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3 years ago

How to find volume with mass and density

Chemistry

1 answer:

AURORKA [14]3 years ago

5 0

Volume is mass divided by density or mass/density.

so 244/2.70
is equal to 90.3703703704 which is the volume

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If you are asked to compare matter in solid, liquid, and gaseous states, which statement best defines a gas?

Elza [17]

I am pretty sure that <span>If I were asked to compare matter in solid, liquid, and gaseous states, the statement which would best defined a gas is </span>highest energy, highest molecular motion, and least dense packaging of molecules. I choose this one because it's not sensible to <span>heat CO2 (in case of safety) and in the last option the amount of energy is not satisfying.

Hope it helps!</span>

8 0

3 years ago

Read 2 more answers

Two 10g blocks, one of copper and one of iron, were heated from 300 K to 400K (a temperature difference of 100 K).

12345 [234]

1) 385 J

2) 450 J

Explanation:

The amount of energy that must be absorbed by a certain substance in order to increase its temperature by $\Delta T$ is given by the equation:

$Q=mC\Delta T$

where

m is the mass of the substance

C is its specific heat capacity

$\Delta T$ is the increase in temperature of the substance

For the block of copper in this problem, we have:

m = 10 g is the mass

$C=0.385 J/gK$ is the specific heat capacity of copper

$\Delta T=400-300 = 100 K$ is the change in temperature

So, the energy absorbed by the block of copper is

$Q=(10)(0.385)(100)=385 J$

Similarly for the block of iron, the energy absorbed by the iron is given by

$Q=mC\Delta T$

where

m is the mass of the block of iron

C is its specific heat capacity of iron

$\Delta T$ is the increase in temperature of the block

Here we have:

m = 10 g is the mass of the block

$C=0.450 J/gK$ is the specific heat capacity of iron

$\Delta T=400-300 = 100 K$ is the change in temperature

So, the energy absorbed by the block of iron is

$Q=(10)(0.450)(100)=450 J$

6 0

3 years ago

What is the symmetry of n??

Aleks [24]

Answer:

n don't hv symmetry lines.

so the symmetry of n is 0

6 0

3 years ago

Select the true statements about protein secondary structure.

netineya [11]

Answer:

The α‑helix is held together by hydrogen bonds between the amide N−H and C=O groups.

Disulfide bonds stabilize secondary structure.

Explanation:

Proteins have primary, secondary, tertiary and quartinary structures.

The secondary structure of a protein is the regular, recurring sequence of amino acid in a polypeptide chain. Secondary structure of proteins give rise to the folding observed in the structure of a protein.

The major secondary structures of a protein are α-helices and β-structures.

7 0

3 years ago

Which of the following explains the formation of the curved surface of water in the graduated cylinder shown below?

lara [203]

Answer: option D, Attractive forces form between polar water molecules and polar glass molecules in the cylinder.

Explanation:

1) The curved surface of water in the cylinder shown in the figure is named concave meniscus.

2) The situation shown reflects two forces that oppose each other.

These are the adhesive force and the cohesiive force.

3) The adhesive force is the of attraction between molecules of different substances, while the cohesive force is the attraction between molecules of the same substance.

4) Water has a strong cohesive force property in virtue of the hydrogen bonds (the particles of water tends to remain together due to the high intensity of the hydrogen bonds). This is why water form drops.

But also, there is a strong cohesive force between the polar water molecules and the polar glass molecules in the cylinder.

The concave meniscus is the result of the fact that the adhesive force between the surface of the glass cylinder and the molecules of water overcomes the cohesive force of the water molecules.

6 0

3 years ago