Answer: False, True, True, True, True
Explanation:
Sound can travel through a vacuum.
False. Sound requires a medium (solid, liquid, or gas) to travel through. It cannot travel through a vacuum because there are no particles in a vacuum to transmit the sound waves.
Sound travels in longitudinal waves.
True. Sound waves are indeed longitudinal waves, which means the particles in the medium vibrate parallel to the direction of the wave.
Sound is caused by vibration.
True. Sound is produced by the vibration of particles in a medium, which creates compressions and rarefactions that propagate as sound waves.
Sound travels most slowly through a gas.
True. Sound generally travels more slowly through gases compared to liquids and solids because the particles in gases are more spread out, leading to a lower transmission speed.
Sound speeds up when the temperature is increased.
True. In general, the speed of sound increases with an increase in temperature. This is because an increase in temperature typically leads to an increase in the speed of the particles in the medium, allowing sound waves to propagate more quickly.
So, the correct statements are 2, 3, 4, and 5.
a car travels 66 kilometers in 3 hours. what is its speed
A car travels 66 kilometers in 3 hours 22 km/h is its speed. The speed of an object, also known as v in kinematics.
What is speed?The speed of an object, also known as v in kinematics, is the size of the change in that object's position over a period of time or the size of the change in that object's position over a given period of time, making it a scalar quantity. The total amount of distance travelled by an object in a time interval is divided by the length of the interval to determine its average speed.
As the length of the time period approaches 0, the speed at that moment is the highest point of the average speed. Velocity and speed are not the same thing. The parameters of speed are time divided by distance. The metre every second (m/s), the SI measure of speed, is the most widely used unit measuring speed.
Speed = distance/time
Speed = 66 km / 3 h
Speed = 22 km/h
Therefore, 22 km/h is the speed.
To know more about speed, here:
https://brainly.com/question/13263542
#SPJ2
Why does a solid change to liquid when heat is added?
O A. The spacing between particles decreases.
B. Particles lose energy.
C.
The spacing between particles increases.
D. The temperature decreases.
Reset
Next
A solid changes to a liquid when heat is added because the energy causes particles to vibrate more vigorously, increasing the spacing between them and allowing them to move more freely, thus overcoming the forces holding them in a solid state. Option C is correct .[The spacing between particles increases]
When heat is added to a solid, it causes the particles (such as atoms or molecules) in the solid to gain energy. This increase in energy causes the particles to vibrate more vigorously, which weakens the forces that hold them together in a fixed position. As a result, the particles can start to move around more freely. This is why the spacing between particles increases, leading to a state change from solid to liquid. This transition from solid to liquid is referred to as melting.
During this phase change, the temperature of the substance does not increase; instead, the added energy is used to overcome the intermolecular forces and change the state of the substance. Once enough energy has been absorbed to weaken these forces sufficiently, the solid becomes a liquid.
Which is an example of a voltaic cell? A. a battery B. electrolysis of water C. electroplating of chrome D. a rechargeable battery
Answer: A. a battery is an example of a voltaic cell
Choice A is the correct option in this question.
Explanation:
When the Silver Nitrate and copper are put in a container then redox reactions takes place which is the reason behind production of charge in a voltaic cell.
In case of battery also the same reaction takes place but it in a greater magnitude Hence a battery can be said to be a combination of several voltaic cells or we can also say that a battery is a bigger voltaic cell that produces current in a much larger magnitude than a simple cell.
Answer:
a battery
Explanation:
Plato
Which statement implies that some ethanol supporters have changed their minds about the fuel?
Answer:
D. “Many people are disappointed in ethanol because they believed that it would help reduce the price at the pump, not increase it.”
Explanation:
Answer:
B.many people are disappointed in ethanol because they believed that it would help reduce the price at the pump, not increase it”
Explanation:
What are the names of the two groups of elements known as the rare earth elements? _________ ___and ____________
Answer:The Rare Earth Elements are: Lanthanide Series and Actinide Series.
Answer:The thirty rare earth elements are composed of the lanthanide and actinide series. One element of the lanthanide series and most of the elements in the actinide series are called trans-uranium, which means synthetic or man-made.
Explanation:
the kilocalories in one can of cola if it has 40. g of carbohydrate and no fat or
protein
Answer:
One can of cola contain 0.16 kcal of carbohydrates.
Explanation:
Given data:
mass of cola can = 40 g
kilocalories of carbohydrates = ?
Solution:
we know that there are 4 cal of carbohydrates per gram.
40 g × 4 cal/g = 160 cal
Now we will convert calories into kilocalories. There are 1000 calories in one kilocalories so,
160/1000 = 0.16 kcal
so, one can of cola contain 0.16 kcal of carbohydrates.
Final answer:
To calculate the kilocalories in a can of cola with 40 grams of carbohydrate, multiply the amount of carbohydrate by 4 kilocalories per gram. This results in 160 kilocalories.
Explanation:
The number of kilocalories in one can of cola can be calculated knowing that carbohydrates provide 4 kilocalories of energy per gram. Given that the cola has 40 grams of carbohydrate and no fat or protein, we can simply multiply the amount of carbohydrate by the energy it provides.
So, 40 grams of carbohydrate * 4 kilocalories/gram = 160 kilocalories.
This means that one can of cola, with its 40 grams of carbohydrates and no contribution from fat or protein to its energy content, provides a total of 160 kilocalories of energy.
question 1.
Given Fe2O3, how many atoms are present in one molecule?
A. 1 atom of Fe2O3
B. Three sets of these molecules: 1 atom of Fe, and 2 O's
C. 1 F, 2 e's, 3 O's
D. 2 Fe's, 3 O's
question 2.
When wildfires make Washington air smoky, we use air purifiers in homes to separate the smoke from the air we breathe.
You can read more about these methods here: https://www.airpurifiers.com/pages/air-purifiers-activated-carbon-technology
Do you think activated carbon filters use physical or chemical means (or both) to separate the impurities from the air? Explain your ideas.
Answer:
Explanation:
D. 2 Fe's, 3 O's
An atom is the smallest indivisible particle of a substance. Most notations of elements in actual sense depicts the combining atoms.
In Fe₂O₃, the subscript gives the idea of the number of combining atoms and their combining ratios. Here, weh have 2 atoms of Fe and 3 atoms of Oxygen.
Activated carbon filters use chemical means to seperate impurities from air:
Chemical reactions occurs when compounds are formed. Activated carbon filters are made up of activated carbons in which impurities have been removed and the pores of the carbon structure have become widened. This leaves the carbon with much surface area for chemical reaction to occur between impurities and the carbon in form of chemical adsorption. One important thing to note is that, in chemical change, it is difficult to resolve the reactants after the product is formed. In physical change, simple seperation techniques are used to seperate the reactants out.
Which is the balanced chemical equation representing the reaction between
vinegar and baking soda?
C2H4O2 + NaHCO3 - NaC2H302 + H2O + CO2
O A) C2H4O2 + NaHCO3 - NaC2H302 + H2O + CO2
O B) C2H4O2 + 2NaHCO3 - 2NaC2H302 + H2O + CO2
OC) 2C2H4O2 + NaHCO3 - NaC2H302 + H2O + 2002
OD 2C2H4O2 + NaHCO3 - NaC2H302 + 2H20 + 2002
Answer:
The correct option is OA.
C2H4O2 + NaHCO3 - NaC2H302 + H2O + CO2
Explanation:
To solve this you have to check the number of elements in both sides of the equation.
Answer:
Choice A: [tex]\rm 1\; C_2H_4 O_2 + 1\;NaHCO_3 \to 1\;NaC_2H_3O_2 + 1\;H_2O + 1\;CO_2[/tex].
Explanation:
Indeed it is possible to balance this equation by the conservation of atoms in a chemical reaction. However, knowing what's actually going on in this process will likely make this problem easier to solve.
Vinegar contains acetic acid [tex]\rm C_2H_4 O_2[/tex]. Acetic acid is a monoprotic acid. In other words, each [tex]\rm C_2H_4 O_2[/tex] can dissociate to produce up to one hydrogen ion [tex]\rm H^{+}[/tex]. That is:
[tex]\rm C_2H_4 O_2 \rightleftharpoons {C_2H_3 O_2}^{-} + H^{+}[/tex].
Baking soda is a common name for sodium bicarbonate [tex]\rm NaHCO_3[/tex]. Each formula unit of [tex]\rm NaHCO_3[/tex] contains one bicarbonate ion: [tex]\rm {HCO_3}^{-}[/tex]. Each bicarbonate ion will consume one hydrogen ion to produce water and carbon dioxide:
[tex]\rm {HCO_3}^{-} + H^{+} \to H_2O + CO_2[/tex].
For this chemical equation to balance, the number of hydrogen ions that [tex]\rm C_2H_4 O_2[/tex] supplies shall be the same as the number of these ions that [tex]\rm NaHCO_3[/tex] consumes. Each unit of [tex]\rm C_2H_4 O_2[/tex] supplies one unit of hydrogen ions while each unit of [tex]\rm NaHCO_3[/tex] consumes one unit of hydrogen ions. Reacting the two at a one-to-one ratio will make sure that this reaction neither run short of hydrogen ions or produce more hydrogen ions than it need.
Hence the coefficient in front of [tex]\rm C_2H_4 O_2[/tex] and [tex]\rm NaHCO_3[/tex] shall be the same. Let their coefficients be one.
[tex]\rm 1\; C_2H_4 O_2 + 1\;NaHCO_3 \to ?\;NaC_2H_3O_2 + ?\;H_2O + ?\;CO_2[/tex].
Now, balance this equation with reference to the number of atoms:
One Na atom;Five H atoms;Five O atoms;Three C atoms.[tex]\rm 1\; C_2H_4 O_2 + 1\;NaHCO_3 \to 1\;NaC_2H_3O_2 + 1\;H_2O + 1\;CO_2[/tex].
what is a property that depends on the amount of matter in a sample
Answer:
An extensive property is a property that depends on the amount of matter in a sample. Mass and volume are examples of extensive properties. An intensive property is a property of matter that depends only on the type of matter in a sample and not on the amount.
HOPE THIS HELPED!!!!!!!!!!!!!!XDDDDDDDDD
Final answer:
An extensive property depends on the amount of matter in a sample, examples being mass and volume. Intensive properties such as temperature do not vary with the quantity of matter. The differentiation between these property types is essential for accurately describing and measuring substances in chemistry.
Explanation:
A property that depends on the amount of matter in a sample is called an extensive property. Examples of extensive properties are mass and volume. For instance, a gallon of milk has a greater mass and volume than a cup of milk, illustrating that the value of an extensive property increases with the amount of matter. In contrast, an intensive property does not depend on the amount of matter; temperature is an example of this, where the temperature of small or large quantities of a substance at thermal equilibrium will be the same.
Understanding the difference between extensive and intensive properties is crucial for characterizing substances and engaging in scientific measurements. The amount of heat is an extensive property because it depends on the matter's quantity, whereas temperature is an intensive property as it remains consistent regardless of the sample size. A hot cooking oil drop and a pot of hot oil could have the same temperature, an intensive property, yet the pot contains more heat, showing an extensive property.
GCSE Science - Physics
Reduce Contrast
Show Help
Show Links
Question 6 of 28
2
40%
Which has greater kinetic energy: a bowling ball that has a mass of 5kg travelling at 6m/s or a ship that has a mass of
120000kg and is moving at 0.02m/s?
ship
bowling ball
Answer:
The answer to your question is: the bowling ball
Explanation:
Formula
Kinetic energy = (1/2)mv²
Data
Bowling ball
mass = 5 kg, v = 6 m/s
ship
mass = 120000 kg, v = 0.02 m/s
Substitution
bowling ball
Ke = (1/2)(5)(6)² = 90 Joules
Ship
Ke = (1/2)(120000)(0.02)² = 24 Joules
Fron the results, we conclude that the ball has greater kinetic energy than the Ship.
Which city is located at 15 degrees south, 50 degrees east
Answer:
Antalaha, Madagascar
Explanation:
The closest city to geographical coordinates 15 degrees south, 50 degrees east - 15°00'00"S 50°00'00"E- is Antalaha, a commune of the Republic of Madagascar. The city is part of the Anthala district in northeastern Madagascar in the Sava Region ; the city population is 34,112 and has a tropical rainforest climate.
A multi-nutrient fertilizer contains several different nitrogen containing compounds. The fertilizer is 54.8% CH4N2O (urea), 26.3% KNO3 , and 14.1% (NH4)2HPO4 by mass. The remainder of the fertilizer consists of substances that do not contain nitrogen. How much fertilizer should someone apply to provide 2.90 g N to a plant?
Approximately 7.80 g of this multi-nutrient fertilizer should be applied to provide 2.90 g of nitrogen to a plant, assuming the nitrogen is 100% available to the plants.
Explanation:To calculate the amount of fertilizer needed to provide 2.90 g of nitrogen, we need to know the nitrogen content in each component of the fertilizer. The nitrogen content of the compounds CH4N2O (urea), KNO3, and (NH4)2HPO4 is approximately 46.6%, 13.9%, and 21.2% respectively. Therefore, the total percentage of nitrogen in the fertilizer is ((0.548 * 46.6) + (0.263 * 13.9) + (0.141 * 21.2))/(0.548 + 0.263 + 0.141) = 37.2%.
To provide 2.90 g of nitrogen, we need to apply: 2.90 g / 0.372 = 7.80 g of fertilizer. This calculation assumes that the nitrogen in the fertilizer is 100% available to the plants, which may not be the case because plants require certain biochemical processes like nitrogen fixation to make nitrogen bioavailable.
Learn more about Fertilizer Calculation here:https://brainly.com/question/36392600
#SPJ3
To provide 2.90 g of nitrogen (N) to a plant, you need to determine the amount of fertilizer required. The multi-nutrient fertilizer consists of urea, potassium nitrate, and ammonium phosphate. The total amount of fertilizer needed is 37.89 g.
Explanation:To provide 2.90 g of nitrogen (N) to a plant, you need to determine the amount of fertilizer required. From the given information, the multi-nutrient fertilizer is 54.8% urea (CH4N2O), 26.3% potassium nitrate (KNO3), and 14.1% ammonium phosphate [(NH4)2HPO4]. We can calculate the amount of each component needed to provide 2.90 g of N:
Urea: (2.90 g N) / (0.548 g N/g fertilizer) = 5.29 g fertilizerPotassium nitrate: (2.90 g N) / (0.263 g N/g fertilizer) = 11.03 g fertilizerAmmonium phosphate: (2.90 g N) / (0.141 g N/g fertilizer) = 20.57 g fertilizerTherefore, to provide 2.90 g of N, a total of 37.89 g of fertilizer is required.
Learn more about fertilizer application here:https://brainly.com/question/29999565
#SPJ2
What is always true of an object with a lot of mass?
A)It contains a lot of matter incorrect answer
B)It has a large volume incorrect answer
C)It has a high-density incorrect answer
D)It cannot be accurately measured
Answer:
A) It contains a lot of matter.
An object with a lot of mass always has a lot of matter. This doesn't mean it necessarily has a large volume or high density, and it can be accurately measured.
Explanation:The statement that is always true of an object with a lot of mass is that it contains a lot of matter. Put simply, the mass of an object is a measure of how much matter the object contains. It's derived from the quantity of atoms and molecules within the object. Mass is different from volume, which is the amount of space an object occupies, and density, which is the ratio between mass and volume. Therefore, it's not necessarily true that an object with a lot of mass will also have a large volume or high density. The mass of an object can always be measured precisely, given the right tools. Therefore, it's incorrect to say an object with a lot of mass cannot be accurately measured.
Learn more about Mass here:https://brainly.com/question/19694949
#SPJ2
What is the definition of a cylinder
Final answer:
A cylinder is a 3-dimensional geometric shape with two parallel circular bases and a curved surface. It has applications across disciplines, including biology and physics, where its volume calculation (V = A*h) is crucial, and its shape influences resistance in electric circuits and the properties of capacitors and sound.
Explanation:
The definition of a cylinder in mathematics refers to a 3-dimensional geometric shape with two parallel circular bases connected by a curved surface. This surface is perpendicular to the bases and extends the same distance from every point on one base to the corresponding point on the other base. Cylinders can be found in various applications, from everyday objects like pipes and cans to biological structures and fluid dynamics.
In biology, cylinders are significant structures for mobility in organisms. For example, stolons in plants and rhizomorphs in fungi have cylindrical shapes that allow them to spread and cover territory effectively. Similarly, in physics, the concept of a cylinder is used to understand resistance in electric circuits and fluid mechanics. The volume of a cylinder is calculated by multiplying its cross-sectional area A by its height (V = A*h), which is a crucial factor in determining its capacity or the amount of substance it can hold.
In addition, when discussing capacitors or sound in physics, a cylindrical shape is a fundamental part of the structure affecting their properties. These examples demonstrate the importance of understanding cylindrical geometry in both theoretical and practical applications.
25.0 g of mercury is heated from 25°C to 155°C, and absorbs 455 joules of heat
in the process. Calculate the specific heat capacity of mercury.
Answer:
The answer to your question is: Cp = 0.14 J/g°C
Explanation:
Data
mass = 25 g
T1 = 25°C
T2 = 155°C
Q = 455 joules
Cp = ?
Formula
Q = mCpΔT
Clear Cp from the equation Cp = Q /(mΔT)
Cp = 455 /((25(155-25))
Cp = 455 / (25(130))
Cp = 455 / 3250
Cp = 0.14 J/g°C
The specific heat capacity of the mercury is 0.14 J/gºC
To solve this question, we'll begin by calculating the change in the temperature of the mercury. This is illustrated below:
Initial temperature of water (T₁) = 25 °C
Final temperature of water (T₂) = 155 °C
Change in temperature of water (ΔT) =?ΔT = T₂ – T₁
ΔT = 155 – 25
Change in temperature of mercury (ΔT) = 130 °CFinally, we shall determine the specific heat capacity of the mercury. This can be obtained as follow:Mass of mercury (M) = 25 g
Change in temperature of mercury (ΔT) = 130 °C
Heat absorbed (Q) = 455 J
Specific heat capacity of mercury (C) =? Q = MCΔT455 = 25 × C × 130
455 = 3250 × C
Divide both side by 3250
[tex]C = \frac{455}{3250} \\\\[/tex]
C = 0.14 J/gºCTherefore, the specific heat capacity of the mercury is 0.14 J/gºC
Learn more: https://brainly.com/question/24813298
you are driving down the road at 35 mph. what is your speed in m/s?
Answer:
15.64m/s
Explanation:
This is a unit of speed which is the rate of change of distance with time
I am driving at 35mph: and I want to express as m/s
mph means miles per hour
This suggests that I have to convert miles to m and hrs to secs:
for distance 1.609km = 1mi
1000m = 1km
for time:
1hr = 60minutes
1min = 60seconds
Using dimensional analysis:
[tex]\frac{35miles}{1hour}[/tex] x [tex]\frac{1.609km}{1miles}[/tex] x [tex]\frac{1000m}{1km}[/tex] x [tex]\frac{1hour}{60min}[/tex] x [tex]\frac{1min}{60seconds}[/tex]
= 15.64m/s
Which requires more heat to warm from 22.0°C and 85.0°C, 45.0 g of water or 200. g of aluminum metal?
water
aluminum
What is the heat produced in each case? Use 0.905 J/cal°C for Al.
water
______ J
Aluminum
______ J
Answer:
The answer to your question is Aluminum
Explanation:
We need to warm from 22°C to 85°C
a) 45 g of water
b) 200 g of aluminum Cp = 0.905 J/cal°C
a) Water
Q = mCpΔT
Q = (45)(1)(85 - 22) = 45(63) = 2835 cal
b) Aluminum
Q = (200)(0.905)(85 - 22) = 114030 cal
an object is found to have a mass of 77 g find the objects density if its volume is 46.55cm³ answer in units of g/cm3
Answer:
1.654 g/cm3
Explanation:
density can be define as mess per unite volume of any object.
Formula
D=m/v
Given data:
Mass= 77 g
Volume= 46.55 cm3
Now we will put the values in formula:
D=77 g/ 46.55 cm3= 1.654 g/cm3
So the density of object is 1.654 g/cm3.
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 24.0 g of carbon were burned in the presence of 82.7 g of oxygen, 18.7 g of oxygen remained unreacted. What mass of carbon dioxide was produced?
Answer:
mass of CO2 = 88 g
Explanation:
It is stated in question that 18.7 g of oxygen remained unreacted which means that carbon is limiting reactant. Thus the amount of carbon dioxide produced depend upon the amount of carbon.
Given data:
mass of carbon = 24 g
total mass of oxygen 82.7 g
mass of unreacted oxygen = 18.7 g
mass of carbon dioxide = ?
Solution:
First of we will calculate the moles of carbon.
number of moles of carbon = mass of carbon / atomic weight
number of moles of carbon = 24 g/ 12 g/mol = 2 mol
Chemical equation:
C + O2 → CO2
now we compare the number of moles of carbon and carbon dioxide,
C : CO2
1 : 1
2 : 2
Now we will calculate the mass of carbon dioxide from moles.
number of moles of CO2 = mass of CO2 / molar mass of CO2
2 mol × 44 g/mol = mass
mass of CO2 = 88 g
What determines the amount of energy an electron has?
Answer:
The energy of an electron in many–electron atom is determined by both principal quantum number (n) and azimuthal quantum number (l)
Glucose is a simple sugar made up of a carbon, hydrogen, and oxygen. What kind of molecule is glucose?
Glucose falls under aldoses group of monosaccharides which are one of the carbohydrates.
Explanation:
Generally, a molecule formed by combination of carbon, hydrogen and oxygen are termed as carbohydrates. The smallest of the saccharides are mono and disaccharides. The saccharides can contain an aldehyde or a ketone group in their structural formula.
The molecular formula of glucose is C6H12O6. It falls under monosaccharide as the molecular formula of monosaccharides are (CH2nO)n where the n will be 3,5 or 6. So the molecular formula of glucose exactly matches with the molecular formula of monosaccharide family.
Also, it is known that glucose contains an aldehyde so it can be termed as aldose for being a carbohydrate in monosaccharide family containing aldehyde group.
Answer:
Glucose is nothing but a type of carbohydrate molecule which is also called as monosaccharides.
Explanation:
They are the smallest unit or simplest part of Carbohydrates which accumulates and join together to make bigger molecules of carbohydrates, Since these are made up of carbon, hydrogen, and oxygen.
These three elements mix together in given parts to make this smallest part of Carbohydrates or sugar. The Other bigger carbohydrates that are formed with these three elements are disaccharides or sucrose.
What are the bonds inO^3 expected to be?
Answer:
One single coordinate covalent bond and one double covalent bond between the oxygen atoms, not in the expected triangular but in 1 bond structure.
Explanation:
O³ is also called ozone, and has three atoms in each molecule which makes it an allotropic form of oxygen.
Compared to oxygen, ozone is much more chemically active.
⇒The structure of ozone has 3 oxygen atoms, but due to steric hindrance, they can't form the expected triangular structure, with each O atom.
⇒Instead each Oxygen forms only 1 bond, with the remaining negative charge being spread throughout the molecule, with one single coordinate covalent bond and one double covalent bond.
⇒The two O-O that share the double covalent bond are nonpolar as there is no electronegativity between atoms of the same element (they share the same number of electrons, so there is no difference).
⇒ However, the distribution of the electrons along the 3 oxygen atoms is uneven, because the central atom must share electrons with the two atoms at both sides. The outer atoms only share electrons with the central atom.
So we can say that the central atom is more deprived of electrons than the 2 other oxygen atoms.
In terms of geometry,the molecule is bent, which is the result of this sharing of electrons and thus results in a dipole force across the ozone molecule.
You are given a solution of sugar and sand and water your task is to separate sugar from sand which of the following experimental designs would you choose
Answer:
Explanation:
Filtration followed by evaporation:
To separate the mixture of sand and sugar, it is best to use the separation technique of filtration then evaporation.
Pour the water into the mixture. The sugar will dissolve with time in the water. Sand is made up of quartz and does not dissolve in water.
After the dissolution, filter the solution to separate the sand using a filter paper.
Dry the sand thereafter then proceed to evaporate the sugar with water solution. Evaporation will turn water into vapor and the sugar crystals will be left behind.
To separate sugar from sand in a water mixture, filtration followed by evaporation is the most effective method. Sand is retained on the filter paper, while the sugar dissolves in the water and can be retrieved through evaporation.
Explanation:To separate sugar from sand in a solution with water, we can use the concept that sugar is soluble in water whereas sand is not. The separation can be achieved by a process called filtration. First, we stir the mixture to ensure that all the sugar dissolves in the water. Then, we pour the mixture through a filter paper. The sand particles will be trapped by the filter paper, while the sugar-laden water will pass through. After collecting the filtrate (the sugar-water solution), we can recover the sugar by evaporating the water, leaving the sugar behind.
Additionally, we can consider the density difference between sugar and sand as a factor irrelevant to this method of separation but interesting to note for other purposes such as differentiating substances in a pile, as with the take-home experiment with sugar and salt. Also, while this experiment doesn't involve visiting virtual labs, such labs can be useful for understanding the dissolution behaviors of substances like sugar and salt in water.
Learn more about Separation Techniques here:https://brainly.com/question/31048712
#SPJ6
the volume and amount of gas are constant in a tire. the initial pressure and temperature are 1.82 atm and 293k. at what temperature will the gas in the tire have a pressure of 2.35 atm?
Answer:
378k
Explanation:
Why would a patient need to be in prone position?
The prone position in medical contexts involves a patient lying face-down and can aid in breathing and medical procedures, offering benefits like improved air intake for artificial respiration.
Prone position is when a person is lying face-down. In medical settings, patients might need to be in a prone position for reasons such as aiding in breathing or allowing for specific medical procedures.
One major advantage of the prone position is that it allows for better air intake into the lungs, which can be crucial in scenarios like artificial respiration.
Artificial respiration, such as in cases of drowning, can benefit from the prone position as it facilitates the removal of mucus and water from the airways.
Calculate the number of grams of CO that can react with 0.400 kg of Fe2O3.
Express your answer in grams to three significant figures.
Answer:
The number of grams of CO that can react with 0.400 kg of [tex]Fe_2 O_3[/tex] is 210 g.
Explanation:
The balanced chemical equation is
[tex]$F e_{2} \boldsymbol{O}_{3}(s)+3 \boldsymbol{C} \boldsymbol{O}(\boldsymbol{g})>2 \boldsymbol{F e}(\boldsymbol{s})+3 \boldsymbol{C} \boldsymbol{O}_{2}(\boldsymbol{g})$[/tex]
[tex]$0.400 \mathrm{kg} \mathrm{Fe}_{2} \mathrm{O}_{3} \times \frac{1000 \mathrm{g} \mathrm{Fe}_{2} \mathrm{O}_{3}}{1 \mathrm{Kg} \mathrm{Fe}_{2} \mathrm{O}_{3}} \times \frac{1 \mathrm{mol} \mathrm{Fe}_{2} \mathrm{O}_{3}}{159.7 \mathrm{gFe}_{2} \mathrm{o}_{3}} \times \frac{3 \mathrm{molCO}}{1 \mathrm{molFe}_{2} \mathrm{o}_{3}} \times \frac{28 \mathrm{g} \mathrm{CO}}{1 \mathrm{mol} \mathrm{CO}}$[/tex]
=210g CO is the Answer
The number of grams of CO that can react with 0.400 kg of [tex]Fe_2 O_3[/tex] is 210 g.
An enzyme works best at 98.6°F.
The equation used to describe it requires the temperature to be in K.
please help asap
What is the correct temperature?
Use (F×0.555)+255.37=K or (K−255.37)×1.8=F .
37 K
236 K
310 K
482 K
Answer:
310.093K
Explanation:
Given parameters:
Temperature of the enzyme = 98.6°F
Unknown:
We are to convert the temperature from the fahrenheit scale to Kelvin scale:
Solution
Properly writing the equation given to solve the problem:
K = (F x 0.55) + 255.37
F = (K - 255.37) x 1.8
K stands for the temperature in kelvin and F is the temperature in fahrenheit.
The first equation would be a lot more easier to use:
K = (98.6 x 0.555) + 255.37 = 54.723 + 255.37 = 310.093K
What change causes a substance to change states of matter?
Options:
A) The amount of kinetic energy in the substance’s particles changes
B) The temperature of the substance decreases a small amount
C) The temperature of the substance increases a small amount
D) A chemical reaction happens
Answer: Option (A) is the correct answer.
Explanation:
It is known that kinetic energy is the energy obtained by an object due to its motion.
And, when we increase the temperature of a substance then there will occur an increase in the kinetic energy of its molecules.
Also, K.E = [tex]\frac{3}{2}kT[/tex]
So, kinetic energy is directly proportional to the temperature. As a result, on increasing the temperature more number of collisions will take place between the molecules.
Therefore, we can conclude that amount of kinetic energy in the substance’s particles changes its states of matter.
A substance changes its state of matter primarily due to changes in the amount of kinetic energy in its particles, often induced by temperature changes.
Explanation:A change in a substance's state of matter is primarily due to the change in the amount of kinetic energy in the substance's particles, which is often triggered by changes in temperature (Option A). Kinetic energy is the energy a particle possesses due to its motion. An increase in kinetic energy (which could be due to an increase in temperature) typically causes the substance to go from a solid to a liquid (melting) or a liquid to a gas (evaporation). Conversely, a decrease in kinetic energy (for example during cooling) can cause a substance to go from a gas to a liquid (condensation) or a liquid to a solid (freezing).
Learn more about Kinetic Energy here:https://brainly.com/question/33783036
#SPJ6
How many grams of cs in a sample of cs that contains the same number of moles as a 109 gram sample of sn
Answer:
122.04g
Explanation:
Cs is Caesium
Mass of Sn, tin = 109g.
Solution
we must first find the number of moles of the Sn from the given mass:
number of moles = [tex]\frac{mass}{molar mass}[/tex]
molar mass of Sn = 118.7g/mol
number of moles = [tex]\frac{109}{118.7}[/tex] = 0.918moles
Now since the number of moles of the Sn is the sameas that of Cs, we can find the mass of Cs that will equal that.
Mass of Cs = number of moles x molar mass of Cs = 0.918 x 132.9 = 122.04g
To find the mass of cesium with the same number of moles as a 109-gram sample of tin, we calculate the moles of tin and then use the molar mass of cesium to find that it would be approximately 125.766 grams.
Explanation:The student's question is asking for the mass of cesium (Cs) in grams when it contains the same number of moles as a 109-gram sample of tin (Sn). To find the answer, we first calculate the number of moles in the 109-gram sample of tin using the molar mass of tin (118.7 g/mol), which gives us approximately 0.918 moles.
Since we are looking for the same amount of moles in cesium, and knowing that one mole of cesium has a mass of 137 grams according to the given information, the mass of cesium would be approximately 125.766 grams (0.918 moles × 137 g/mol = 125.766 g).
Learn more about Molar Mass Calculation here:https://brainly.com/question/25879634
#SPJ12
ME APPRECIATES IT
which measurements are needed in order to calculate the density of a given object
Answer:mass and volume
Explanation: as i know you should divide mass and volume for obtain density
Answer : The correct option is, Mass and volume.
Explanation :
Density : It is defined as the mass of a substance contained per unit volume.
The unit of mass is gram (g) and the unit of volume is milliliter (ml). So, the unit of density is g/ml.
Formula used :
[tex]Density=\frac{Mass}{Volume}[/tex]
For example : If mass of object is 550 grams and volume of water displaced 25 ml. Calculate the density of an object.
By using formula, we get:
[tex]Density=\frac{550g}{25ml}=22g/ml[/tex]
Thus, density of the object will be 22 g/ml
Hence, the mass and volume measurements are needed in order to calculate the density of a given object.