Answer:
Ursus: genus
Arctos: Species
Explanation:
If you think of the way the chart flows from the most broad to the most specific: kingdom, phylum/division, class, order, family, genus, species, you see that genus name comes first then the species name.
GCSE Science - Physics
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Question 6 of 28
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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.
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).
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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
Does nickel form a precipitate when mixed with ammonia or does it form a soluble product?
Answer:
initially it will form precipitate and with excess of ammonia it will form soluble product.
Explanation:
The reaction of nickel with ammonia is:
With aqueous ammonia nickel precipitate out as green gelatinous Ni(OH)₂:
[light green][tex]Ni^{+2}(aq) + 2 OH^{-}(aq)--->2 Ni(OH)_{2}(s)[/tex] (green colored).
If we add further more of ammonia, it will dissolve to form blue solution as:
[tex]Ni(OH)_{2}(s) + 6NH_{3}(aq) <==> [Ni(NH_{3})_{6}]^{+2}(aq) + 2OH^{-}(aq)[/tex]
So initially it will form precipitate and with excess of ammonia it will form soluble product.
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.
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.
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 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.
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
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What coefficients would balance the following equation?
__Al + __O2 → __Al2O3
Question 4 options:
(A) 2Al + 3O2 → 1Al2O3
(B) 2Al + 3O2 → 2Al2O3
(C) 3Al + 3O2 → 2Al2O3
(D) 4Al + 3O2 → 2Al2O3
Answer:
The answer to your question is: Letter D.
Explanation:
To have a balanced reaction, the number of elements in the reactants, must be equal to the number of elements in the products.
So, count the number of elements in each side.
__Al + __O2 → __Al2O3
reactants elements products
1 Al 2
2 O2 3
It's unbalanced
Write a coefficient 4 in Al 4 Al + 3O2 → 2Al2O3
3 in O2
2 in Al2O3
And count again the number of elements
reactants elements products
4 Al 4
6 O2 6
Now, the reaction is balanced
The balanced equation for the formation of aluminum oxide from aluminum and oxygen is 4Al + 3O2 → 2Al2O3, where the ratio of Al to O2 to Al2O3 is 4:3:2. The correct option that reflects these coefficients is (D).
Explanation:The coefficients that would balance the chemical equation for the formation of aluminum oxide (Al2O3) from aluminum (Al) and oxygen (O2) are found by ensuring that the number of atoms of each element is the same on both sides of the equation. The balanced chemical equation will have the following form:
4Al + 3O2 → 2Al2O3
To balance the equation, we assign coefficients to make sure that the number of aluminum atoms and oxygen atoms are the same on both sides. After placing the coefficients, we confirm that for aluminum, 4 Al atoms on the reactants side balance with 4 Al atoms as part of the 2 units of Al2O3 on the products side. For oxygen, 3 O2 molecules on the reactants side provide 6 O atoms, which balance with the 6 O atoms in the 2 units of Al2O3 on the products side. Therefore, the correct option is (D).
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.
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.
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
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:
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.
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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
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
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.
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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.
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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.
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 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.
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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)
how do chemicals affect our lives?
Answer:
Chemicals can affect our lives positively and negatively.
Explanation:
Positively: can help cleaning be easier, can keep bugs from eating plants, etc.
Negative: They can burn you if it is dangerous and your skin is exposed, can be hazardous to your health.
Answer:
Explanation:
Chemicals can affect lives positively and negatively.
Positively: The chemicals are the source of food for building up body and maintaing energy in it.
The chemicals can be in the form of insecticide or pesticide which kill pests, and disease causing insects.
Negatively: The chemicals are in the form of posionous gases like carbon dioxide, sulphur dioxide and others can be responsible for respiratory problems and even death.
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).
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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.
What do you call everything to the "right" of the arrow in a chemical reaction?
Answer:
The symbols on the right of the arrow in a chemical reaction is called the "products". The symbols to the left of the arrow is called the "reactants".
Final answer:
In a chemical reaction, the substances to the right of the arrow are known as the 'products.' They are the new compounds formed as a result of the reactants undergoing the chemical reaction.
Explanation:
In a chemical reaction, the substances that appear to the right of the arrow are called the products. These substances are the result of the reactants undergoing a chemical change during the reaction. For example, in the chemical equation:
Zn + S =ZnS
Zinc (Zn) and sulfur (S) are the reactants found on the left side of the arrow, and zinc sulfide (ZnS) is the product found on the right side. During the reaction, zinc and sulfur combine to form zinc sulfide. It is important to note that in reversible reactions, indicated by a double arrow, the terms 'reactant' and 'product' can change based on the direction of the reaction. Overall, the standard convention for writing chemical equations involves reactants on the left, an arrow indicating the direction, and products on the right.
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.
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
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].