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3 years ago

Select the correct answer from each drop-down menu.

2 answers:

7 0

The medium sized puddle of spilled hot water has the highest vapor pressure because vapor pressure depends on temperature of the object.

Answer: B

Explanation

Vapor pressure, the pressure of vapor molecules of liquid exerting on the liquid surface.

It helps to determine the evaporation rate, the more the vapor pressure the more rate of evaporation will occur.

This is because the vapor pressure is the quantification of vapor molecules of the liquid on the surface of the liquid on giving an external force like heat.

The vapor pressure depends on liquid temperature and liquid surface area and pressure.

So in the given case, rainwater puddle has small surface area and room temperature, spilled hot water puddle has higher surface area as well as temperature compared to rain water puddle.

Even though the cold water puddle has large surface area but the temperature of cold water is very less compared to the temperature of hot water, so it makes the medium sized hot water puddle the one with the highest vapor pressure as the vapor pressure depends on temperature of the liquid.

tankabanditka [31]3 years ago

3 0

Answer:

The medium-sized puddle of spilled hot water has the highest vapor pressure

Explanation:

The evaporation of water is a clear example of phase change from liquid to gas. The chemicals potentials for both phases α (liquid) and β (vapor) are functions dependig of the temperature (T) and the pressure (P) and they have the same value.

μα(T,P) = μβ(T,P)

Based in that assumption is that the equation of Clausius Clapeyron:

Ln Pv = - L/(RT) +C

Being Pv, the vapor pressure. L the vapor entalpy and R the gas constant.

So, the vapor pressure is a mere function of the temperature, thus if the temperature rises, the vapor pressure increases.

With that said, the puddle of hot water, has more temperature and thus, a higher vapor pressure.

Hope it helped!

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1. Ge
2. Fe
3. Zn
Remember, electronegativity decreases down a group (vertically) and increases across a period (horizontally) on the periodic table. :)

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3 years ago

Calculate the number of Cl atoms that are in 1.1 x 10^-21 moles of Cl atoms.

Margarita [4]

According to Avogadro's number there are 62.53 atoms of chlorine in 1.1x 10 $^-21$ moles of Cl atoms.

<h3>What is Avogadro's number?</h3>

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number or number of moles×Avogadro's number.

ON substitution in above formula number of atoms=1.1×10²¹×6.023×10²³=62.53 atoms

Thus, there are 62.53 chlorine atoms in 1.1x 10 $^-21$ moles of Cl atoms.

Learn more about Avogadro's number,here:

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1 year ago

Calculate the percent composition by mass of the following compounds that are important starting materials for synthetic polymer

notsponge [240]

Answer:

C₃H₄O₂ → 50% C; 5.5 % H; 44.5% O

C₄H₆O₂ → 56 % of C; 7 % of H; 37% of O

C₃H₃N → 68 % of C; 6 % of H; 26 % of N

Explanation:

We determine the molar mass of each compound:

C₃H₄O₂ → 72 g/mol

In 1 mol of acrylic acid (72 g), we have:

3 moles of C → 12 g/mol . 3 mol = 36 g of C

4 moles of H → 1 g/mol . 4 mol = 4 g of H

2 moles of O → 16g/mol . 2 mol = 32 g of O

Then in 100 g of salt, we may have:

100 . 36 / 72 = 50 % of C

4 . 100 / 72 = 5.5 % of H

32 . 100 / 72 = 44.5 % of O

C₄H₆O₂ → 86 g/mol

In 1 mol of methyl acrylate (86 g), we have:

4 moles of C → 12 g/mol . 4 mol = 48 g of C

6 moles of H → 1 g/mol . 6 mol = 6 g of H

2 moles of O → 16g/mol . 2 mol = 32 g of O

Then in 100 g of salt, we may have:

100 . 48 / 86 = 56 % of C

6 . 100 / 86 = 7 % of H

32 . 100 / 86 = 37 % of O

C₃H₃N → 53 g/mol

In 1 mol of acrylonitrile (53 g), we have:

3 moles of C → 12 g/mol . 3 mol = 36 g of C

3 moles of H → 1 g/mol . 3 mol = 3 g of H

1 mol of N → 14g/mol . 1 mol = 14 g of N

Then in 100 g of salt, we may have:

100 . 36 / 53 = 68 % of C

3 . 100 / 53 = 6 % of H

14 . 100 / 53 = 26 % of N

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ss7ja [257]

Chocolate milk is just regular white milk that has chocolate syrup/powder mixed into it
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