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valkas [14]
3 years ago
6

3. Answer INCREASE, DECREASE or REMAIN THE SAME. Explain your answer.

Chemistry
1 answer:
Alex17521 [72]3 years ago
7 0

Answer:

a) decrease

b) increase

c) decrease

Explanation:

a) The density of water <u>decreases</u> as water changes from liquid to steam.

The density of substances are higher when their molecules are very close to each other having strongest bonding forces. When water is change from liquid to steam it means water molecules are not close to each other as they are in liquid state because now water is changed into gaseous form and molecules are further apart from each other. Thus, density goes to decrease.

b)  As the temperature increases, the rate of diffusion of a gas<u> increase.</u>

As temperature increases molecules gets more kinetic energy and rate of diffusion increases.

c) At constant volume, if the temperature of a gas is decreases, its pressure <u>decreases.</u>

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

As temperature decreases its pressure also goes to decrease and vice versa.

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A rectangular block of zinc was found to be 11.014 cm wide, 0.2481 m high, and 523.735 mm deep.
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From the stoichiometry of the problem, 2.01  × 10^5 g of zinc phosphate is produced.

<h3>What is volume?</h3>

Volume is the product of width, height and depth. The significant figures of the width, height and depth are 5, 4 and 6 respectively.The volume of the box is; 11.014  × 10^-2 m  × 0.2481 m × 523.735 × 10^-3 = 0.01431 m^3 or 14310 cm^3 or 0.5053ft^3.

Density of zinc = 7.140 g / cm3

Volume of zinc = 14310 cm^3

Mass of zinc = 7.140 g / cm3 ×  14310 cm^3 = 102 Kg

Moles of Zinc = mass /molar mass = 102 × 10^3/65 g/mol = 1569 moles

There are 195 g of zinc in  386 g zinc phosphate

102 × 10^3 g of Zn will produce  x g

x = 102 × 10^3 g ×  386 g / 195 g

x = 2.01  × 10^5 g of zinc phosphate

Learn more about stiochiometry: brainly.com/question/9743981

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2 years ago
Where will you find maximum rate of evaporation ocean,pond
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Oceans, they are larger than ponds hence they possess wider exposure with more number of surface molecules. 
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If the smallest markings on a ruler are one tenth (1/10) of a centimeter, which of the following measurements could be recorded
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I think it should be A 
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The theater director offered every member of the drama one vote for which play they preferred to perform. The director found tha
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