Answer:
1: tap water to ice cube
2: electric burner to pot
Next section
1: bonfire to air
2: hand to ice
Next section
1: Molecules in the hot water bottle are moving faster than molecules in the skin
2: Molecules in the skin are moving faster than molecules in the glass
Next section
Collisions result in transfer of energy from molecules of higher kinetic energy to molecules of lower kinetic energy
Warm water molecules slow down while cold water molecules speed up
Explanation:
on edg Good Luck!!
What is the flexible connective tissue shown in blus?
Shoulder Joint
tendon
bong
O cartilage
O muscle
Plssssss i need the answer
Answer:
cartilage
Explanation:
The flexible connective tissue shown in blue in the shoulder joint is cartilage, which provides support and cushioning between bones.
Explanation:The flexible connective tissue in the shoulder joint is primarily cartilage. Cartilage is a tough and resilient tissue that covers the ends of bones where they meet in a joint, providing a smooth surface for low-friction movement. In the shoulder, it is found in the glenoid cavity of the scapula (shoulder blade) and the head of the humerus (upper arm bone).
This articular cartilage naturally reduces friction and cushions the joint during various movements like arm rotation and lifting. While cartilage plays a crucial role in the shoulder joint's flexibility and function, it can be susceptible to wear and tear, leading to conditions like osteoarthritis.
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Suppose 0.09886 M KOH is titrated into 15.00 mL H2SO4 of unknown concentration until the equivalence point is reached. It takes a total volume of 29.25 mL KOH to neutralize the H2SO4. How many moles of acid were neutralized during the titration? Express the answer to five significant figures. 0.00028917 moles acid
Answer:0.0014458
That’s the right one
Answer:
0.0014458
Explanation:
edg
What is the molar mass of Cu(OH)2?
Answer:
97.561 g/mol
Explanation:
The molar mass of Cu(OH)₂ is 97.57 g/mol. This is calculated by adding the atomic masses of copper, oxygen, and hydrogen in the compound. Each element's atomic mass is multiplied by the number of its atoms in the formula.
To find the molar mass of Cu(OH)₂, you need to add up the atomic masses of all the atoms in the compound:
Copper (Cu): 1 atom × 63.55 g/mol = 63.55 g/mol
Oxygen (O): 2 atoms × 16.00 g/mol = 32.00 g/mol
Hydrogen (H): 2 atoms × 1.01 g/mol = 2.02 g/mol
Adding these together gives the total molar mass of Cu(OH)₂:
Cu(OH)₂ molar mass = 63.55 g/mol + 32.00 g/mol + 2.02 g/mol
= 97.57 g/mol
Thus, the molar mass of Cu(OH)₂ is 97.57 g/mol.
City A is located along the shore of an ocean. City B is at the same latitude and altitude, but it is located
about 124 miles (200 km) inland, away from any large bodies of water. Which of the following
statements most likely describe these two cities? Check all that apply.
In the summer, the daytime temperature in City A is typically lower than the daytime temperature
in City B.
In the winter, the daytime temperature in City B is typically lower than the daytime temperature
in City A
City A typically has both higher high temperatures and lower low temperatures than City B.
Answer:
A and B
Explanation:
Answer: A and B.
Explanation:
I took the enginuidy
For the reaction 3 CO + Fe2O3 --> 2 Fe + 3 CO2, how many liters of carbon monoxide at STP are needed to produce 1,001 grams of metallic iron?
Answer:
600.6L
Explanation:
Step 1:
The balanced equation for the reaction.
3CO + Fe2O3 --> 2Fe + 3CO2
Step 2:
Determination of the number of moles in 1001g of Fe.
This is illustrated below:
Mass of Fe = 1001g
Molar Mass of Fe = 56g/mol
Number of mole =?
Number of mole = Mass/Molar Mass
Number of mole of Fe = 1001/56
Number of mole of Fe = 17.875 mole
Step 3:
Determination of the number of mole of CO that reacted during the process.
This is illustrated below:
3CO + Fe2O3 --> 2Fe + 3CO2
From the balanced equation above,
3 moles of CO produced 2 moles of Fe.
Therefore, Xmol of CO will produce 17.875 moles of Fe i.e
Xmol of CO = (3 x 17.875)/2
Xmol of CO = 26.8125 moles
Step 4
Determination of the volume occupied by 26.8125 moles of CO at stp.
1 mole of a gas occupy 22.4L at stp.
Therefore 26.8125 moles of CO will occupy = 26.8125 x 22.4 = 600.6L
Therefore, 600.6L of CO is needed to produce 1001g of Fe
Answer:
[tex]V=602L[/tex]
Explanation:
Hello,
In this case, for the given chemical reaction:
[tex]3 CO + Fe_2O_3 \rightarrow 2 Fe + 3 CO_2[/tex]
In such a way, for the 1,001 g of iron, we compute the required moles of carbon monoxide by using the 2:3 mole ratio:
[tex]n_{CO}=1,001gFe*\frac{1molFe}{55.845gFe}*\frac{3molCO}{2molFe} \\\\n_{CO}=26.89molCO[/tex]
Finally, we use the ideal gas equation to compute the volute at STP conditions (1atm and 273K):
[tex]V=\frac{nRT}{P}=\frac{26.89mol*0.082\frac{atm*L}{mol*K}*273K}{1atm} \\\\V=602L[/tex]
Best regards.
Based on the chart, determine the identity of a substance that increases in temperature by 11.4oC when 1250J of energy are added to a 55g sample.
Substance Specific Heat (J/g oC)
Lithium 3.56
Vegetable Oil 1.99
Air 1.02
Iron 0.444
Sand 0.290
Gold 0.129
Salt
Air
Lithium
Vegetable Oil
Answer:
LIthium vegetable oil
It earth is like a greenhouse carbon gases in the atmosphere are like the
A: planets
B:glass
C:sun
D:ground
When energy is changed from one form to another
Answer:
When energy is transformed from one from to another, energy is transferred form one form to another.
Explanation:
While the transformation of energy occur, total energy remains constant.
This is the LAW OF CONSERVATION OF ENERGY.
Which of the following is a Brønsted-Lowry base?
A- HCl
B- HCO
C- H3O+
D- H3PO4
C. H₃O⁺ is a Bronsted Lowry base.
Explanation:
Any substance that accepts hydrogen ions or (H⁺) ions or protons during any chemical reaction is termed as a Bronsted Lowry base.
Here HCl donates a proton so it is not a Bronsted Lowry base.
HCO is also not a Bronsted Lowry base.
H₃O⁺ is a Bronsted Lowry base because it accepts H⁺ ion from one of its reactant.
H₃PO₄ is also not a Bronsted Lowry base.
So option C. H₃O⁺ is a Bronsted Lowry base.
Out of the given options, H3PO4 is a Brønsted-Lowry base because it can accept a proton to form its conjugate acid.
The Brønsted-Lowry theory defines an acid as a substance that donates a proton (H+) and a base as a substance that accepts a proton. Based on this definition, out of the options given, D- H3PO4 is a Brønsted-Lowry base because it can accept a proton to form its conjugate acid. The other options, A- HCl, B- HCO, and C- H3O+, are all Brønsted-Lowry acids because they can donate a proton.
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Help me please I don’t know this
which statement best describes a newton
Mosquitoes that carry disease-causing organisms from person to person are called _________________.
Answer:
vector
Explanation:
a vector is an organism that transmits a pathogen from organism to organism.
Solar power and wind power are similar because
A.
they are both non-renewable energy sources.
B.
they both are powered by water.
C.
they are both dependent upon weather and location.
D.
they both are very expensive to operate.
what happens when the amplitude of a sound wave changes?
The amplitude of a sound wave determines its loudness. A higher amplitude results in a louder sound, and a lower amplitude results in a softer sound.
In Physics, the amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, while a smaller amplitude means a softer sound.
For instance, a shout has a higher amplitude compared to a whisper. As sound travels further from its source, its amplitude decreases because the energy of the wave spreads over a larger area and is absorbed by objects like eardrums, converting to thermal energy.This spread of energy follows the inverse square law, meaning that doubling the distance from the sound source reduces its amplitude to one-quarter of its original value. This causes the sound to become softer the further it travels.
Can anyone help me with any of the questions
2. a. Approximately 0.0208 L of the 1.20 M AgNO3 solution is needed to precipitate all the chloride ions.
b. Approximately 2.70 g of AgCl should precipitate.
To find out how much AgNO3 solution is needed to precipitate all the chloride ions, we need to determine the amount of chloride ions present in the HCl solution and then use stoichiometry to find the amount of AgNO3 required.
Part a: Volume of AgNO3 solution needed
1. Calculate moles of Cl⁻ ions in the HCl solution:
Given:
- Volume of HCl solution = 250.0 mL = 0.250 L
- Concentration of HCl solution = 0.100 M
[tex]\[ \text{Moles of } \text{Cl⁻} = \text{Concentration} \times \text{Volume} \][/tex]
[tex]\[ \text{Moles of } \text{Cl⁻} = 0.100 \, \text{mol/L} \times 0.250 \, \text{L} = 0.025 \, \text{mol} \][/tex]
2. Use stoichiometry to find the moles of AgNO3 required:
From the balanced chemical equation:
[tex]\[ \text{AgNO3(aq)} + \text{HCl(aq)} \rightarrow \text{AgCl(s)} + \text{HNO3(aq)} \][/tex]
It's a 1:1 molar ratio between AgCl and Cl⁻ ions. So, moles of AgNO3 required = moles of Cl⁻ ions.
[tex]\[ \text{Moles of AgNO3} = 0.025 \, \text{mol} \][/tex]
3. Calculate the volume of 1.20 M AgNO3 solution:
Given:
- Concentration of AgNO3 solution = 1.20 M
[tex]\[ \text{Moles of AgNO3} = \text{Concentration} \times \text{Volume} \][/tex]
[tex]\[ 0.025 \, \text{mol} = 1.20 \, \text{mol/L} \times \text{Volume} \][/tex]
[tex]\[ \text{Volume} = \frac{0.025 \, \text{mol}}{1.20 \, \text{mol/L}} \][/tex]
[tex]\[ \text{Volume} ≈ 0.0208 \, \text{L} \][/tex]
Part b: Mass of AgCl precipitated
1. Calculate moles of AgCl precipitated:
From the stoichiometry, the moles of AgCl precipitated will be equal to the moles of Cl⁻ ions, which is 0.025 mol.
2. Calculate the mass of AgCl precipitated:
Given:
- Molar mass of AgCl = [tex]\( 107.87 \, \text{g/mol} \) (atomic masses: Ag = \( 107.87 \, \text{g/mol} \), Cl = \( 35.45 \, \text{g/mol} \))[/tex]
[tex]\[ \text{Mass of AgCl} = \text{Moles of AgCl} \times \text{Molar mass of AgCl} \][/tex]
[tex]\[ \text{Mass of AgCl} = 0.025 \, \text{mol} \times 107.87 \, \text{g/mol} \][/tex]
[tex]\[ \text{Mass of AgCl} \approx 2.70 \, \text{g} \][/tex]
Identify whether each compound will ionize or dissociate in water. Sodium sulfate (Na2SO4) Ammonium phosphate ((NH4)3PO4) Sulfuric acid (H2SO4) Potassium iodide (KI)
Answer:
Sodium Sulfate: Dissociate
Ammonium Phosphate: Dissociate
Sulfuric Acid: Ionize
Potassium Iodide: Dissociate
Perchloric Acid: Ionize
Cesium Chloride: Dissociate
Nitric Acid: Ionize
Sodium Sulfate: Dissociate
Ammonium Phosphate: Dissociate
Sulfuric Acid: Ionize
Potassium Iodide: Dissociate
Perchloric Acid: Ionize
Cesium Chloride: Dissociate
Nitric Acid: Ionize
What do ionize and dissociate suggest?Ionization is described because of the method wherein new charged debris is produced. Dissociation is described as the technique wherein a charged particle is separated from the prevailing compound. that is an irreversible system. this is a reversible process.
What's the distinction between dissolving and ionizing?Dissolution is any procedure that consequences in stages (whether it's liquid-liquid for acetic acid or stable-liquid for sodium chloride) creating an unmarried segment. Ionic compounds dissociate to try this, however many compounds (glucose, acetone, and many others.) can have interaction sufficient with water enough to dissolve without ionizing.
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A weather balloon has a volume of 1750 L at 103 kPa. The balloon is then released to the atmosphere. What is the pressure if at its highest point above the ground the volume of the balloon is 5,150 L
I also need help with this... chemistry is so difficult
Answer:
35.0 kPa
Explanation:
As pressure decreases, the volume of a gas increases at a given temperature., so since the balloon got bigger, the new pressure must be less than 103kPa
Assuming the temperature does not change, use Boyles Law
P1V1 = P2V2
(103kPa) (1750L) = P2 (5150L)
P2 = (103)(1750) / 5150
The pressure of the gas is inversely proportional to the volume of the gas. The pressure of the balloon at 5150 L is 35.0 kPa.
What is Boyle's Law?Boyle's Law states the relationship between the initial pressure and volume to the final pressure and the volume. It is given as,
[tex]\rm P_{1}V_{1} = \rm P_{2}V_{2}[/tex]
Given,
The initial pressure of the weather balloon = 10.3 kPa
The initial volume of the weather balloon = 1750 L
The final pressure of the weather balloon =?
The final volume of the weather balloon = 5150 L
Substituting values in the above equation:
[tex]\begin{aligned} \rm P_{2} &= \rm \dfrac{P_{1}V_{1}}{V_{2}}\\\\&= \dfrac{103 \times 1750}{5150}\\\\&= 35 \;\rm kPa\end{aligned}[/tex]
Therefore, the final pressure decreases with an increase in volume.
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Can someone please do the last column for me
Answer:
First one is : London dispersion
Second one is: London dispersion
Third One is : dipole-dipole
Fourth one is : induced dipole
Explanation:
An aqueous 0.300 M glucose solution is prepared with a total volume of 0.150 L. The molecular weight of
glucose is 180.16
mol
What mass of glucose (in grams) is needed for the solution?
Answer:
8.11g
Explanation:
Given parameters:
Molarity of aqueous solution = 0.3M
total volume = 0.15L
Molecular weight of glucose = 180.6g/mol
Unknown:
Mass of glucose needed in the solution = ?
Solution:
To solve this problem, we need to understand molarity.
Molarity is the number of moles of solute in a given volume of solution. In this problem, the solute here is the glucose and the solvent is water.
Molarity = [tex]\frac{number of moles of solute}{volume of solution}[/tex]
A solution is made up of solute and solvent.
now, let us solve for the number of moles of the solute which is glucose;
Number of moles of glucose = molarity x volume of solution;
= 0.3 x 0.15
= 0.045mole
Now to find the mass of glucose;
mass of glucose = number of moles x molar mass
input the parameters;
Mass of glucose = 0.045 x 180.16 = 8.11g
To determine the amount of glucose needed for the solution, we calculate the number of moles of glucose in the solution and then use the molecular weight of glucose to convert this to grams. Thus, 8.107 g of glucose is necessary for the solution.
Explanation:To figure out how much glucose we need, we'll have to use molarity, which measures the concentration of a solution. The molarity is defined as the number of moles of solute (in this case, glucose) per liter of solution.
Therefore, we first find the number of moles in the 0.150 L solution by multiplying 0.300 M by 0.150 L, which gives us 0.045 moles of glucose. Then, we multiply this by the molecular weight of glucose, which is 180.16 g/mol. Therefore, to create the solution, we'd need 8.107 g of glucose.
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How many moles of fluorine gas would occupy a volume of 42.3 L at a pressure of 106.1 kPa and a temperature of 940C?
Answer:
5.7
Explanation:
2. Let us say we have a birthday's balloon filled with a volume of 8 liters of 25 points
Helium gas and we measure its pressure to be 0.8 atm. Then after, I've
decided to squeeze it to reduce its volume (size) to 0.5 liters (which
about to pop!), what is the balloon's new pressure?
A.12.8 atm
B.12.0atm
C.10.8 atm
D.11.8 atm
Answer:
Option A.12.8 atm
Explanation:
Step 1:
Data obtained from the question.
Initial Volume (V1) = 8 L
Initial pressure (P1) = 0.8 atm
Final volume (V2) = 0.5 L
Final pressure (P2) =?
Step 2:
Determination of the new pressure. The new pressure of the balloon can simply be obtained by applying the Boyle's law equation as follow:
P1V1 = P2V2
0.8 x 8 = P2 x 0.5
Divide both side by 0.5
P2 = (0.8 x 8) / 0.5
P2 = 12.8 atm
Therefore, the new pressure of the balloon is 12.8 atm
A compound of low solubility
a. is always a strong electrolyte.
b. is always a weak electrolyte.
c. may be a strong or a weak electrolyte.
d. is always a nonelectrolyte.
Answer:
b. is always a weak electrolyte.
Explanation:
Such compounds of low solubility dissociates partly and hence cannot be strong electrolytes
How much energy is released during the formation of 1 mol H2O(g)?
Answer: -241.82 kj
Explanation:
answer: -241.82 then 483.64
Explanation:
_____ H2O2 → _____ H2O + _____ O2
2. How many moles of oxygen form from 0.51 moles of hydrogen peroxide?
Answer : The number of moles of oxygen formed are, 0.255 moles.
Explanation :
The given chemical reaction is:
[tex]H_2O_2\rightarrow H_2O+O_2[/tex]
This reaction is an unbalanced chemical reaction because in this reaction number of oxygen atoms are not balanced.
In order to balance the chemical equation, the coefficient '2' put before the [tex]H_2O_2[/tex] and [tex]H_2O[/tex] then we get the balanced chemical equation.
The balanced chemical reaction will be:
[tex]2H_2O_2\rightarrow 2H_2O+O_2[/tex]
Now we have to calculate the number of moles of oxygen formed.
From the balanced chemical reaction we conclude that,
As, 2 moles of hydrogen peroxide react to give 1 mole of oxygen
So, 0.51 moles of hydrogen peroxide react to give [tex]\frac{0.51}{2}=0.255[/tex] mole of oxygen
Therefore, the number of moles of oxygen formed are, 0.255 moles.
What structures are found in clusters in the mouth and have nerve cells that gather information about whether food is sweet, salty, bitter or sour?
A.
tonsils
B.
saliva glands
C.
taste buds
D.
nostrils
Answer:
taste buds
Explanation:
what does chemical reaction mean?
A process that involve rearrangement of the molecules or ionic structure of substance as distinct from change in the physical form or a nuclear reactions
I hope you are satisfied with this answer
Final answer:
A chemical reaction is a transformation where reactants are turned into products, involving changes at the atomic level including breaking and forming of bonds. Chemical equations represent these reactions, which must be balanced to reflect the conservation of matter.
Explanation:
A chemical reaction is a process that fundamentally changes one or more substances, known as reactants, into one or more different substances, known as products. These transformations involve a combination, separation, or rearrangement of atoms. During chemical reactions, bonds between atoms in the reactants are broken and new bonds are formed to create the products.
Chemical reactions are depicted using chemical equations, which have the reactants on the left side, an arrow representing “yields”, and the products on the right side. For a chemical equation to be useful or valid, it must be balanced, meaning it respects the law of conservation of mass with the same number and types of atoms on both sides. Examples of chemical reactions include the rusting of iron, the combustion of gasoline in a car's engine, and the metabolic processes within a living cell. In each case, the initial substances or reactants are transformed into different substances with new properties.
If you push on a cart, the force of friction will slow it down. Friction is
the conversion of kinetic energy to _____
Select one:
1.heat
2.direction
3.velocity or speed
4.magnetism
Answer:
Heat
Explanation:
Friction can help convert heat into kinetic energy and kinetic energy into heat. Friction can be thought of as particles from different objects hitting each other. Collisions transfer energy converting large scale movement (kinetic energy) into small scale movement (heat).
A volatile liquid is evaporated in a flask in a boiling a water bath (
Temperature = 100°C) with a volume of 297ml. The evaporated gas is
condensed in the flask and it is found to have a mass of 0.435g.
Atmospheric pressure for that day is 765mmHg. What is the Molar Mass of
the Volatile liquid? Show work
Answer:
Molecular Weight of gas = 44.418 grams/mole
Explanation:
PV = nRT = (mass/f.wt.)RT => f.wt. = mass·R·T/P·V
mass = 0.435g
R = 0.08206·L·atm/mol·K
T = 100°C = 372K
P = (765/760)Atm = 1.01Atm
V = 297ml = 0.297L
f.wt. = (0.435g)(0.08206L·Atm/mol·K)(372K)/(1.01Atm)(0.297L) = 44.418 grams/mole
What is the specific heat of copper if a 105 g sample absorbs 15200 joules and the change in temperature is 377 0C ? (Draw a temperature time graph)
Answer : The specific heat of copper is, [tex]0.384J/g^oC[/tex]
Explanation :
Formula used :
[tex]q=m\times c\times \Delta T[/tex]
where,
q = heat absorb = 15200 J
m = mass of sample = 105 g
c = specific heat capacity of copper = ?
[tex]\Delta T[/tex] = change in temperature = [tex]377^oC[/tex]
Now put all the given values in the above formula, we get:
[tex]15200J=105g\times c\times 377^oC[/tex]
[tex]c=0.384J/g^oC[/tex]
Therefore, the specific heat of copper is, [tex]0.384J/g^oC[/tex]
Balance the equation H2+O2=H2O.
Answer:
the answer is written in the picture.
Explanation:
Answer:
2H2 + O2 = 2H2O
Explanation:
To balance the equation, you must place coefficients behind the element and have equal amounts of atoms on both sides. In this case, to balance the equation, it would read:
2H2 + O2 = 2H2O