3 years ago

Air is a good insulator because _____.

1 answer:

6 0

Air molecules are spaced far apart is the answer. Since air is a gas, it’s safe to say its particles are separated in random ranges and fits the statement well.

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Help, cant get it. Answers in picture

Aleks04 [339]

Answer:17.0

Explanation:

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3 years ago

List the 5 signs of a CHEMICAL REACTION

SVETLANKA909090 [29]

Color change, formation of a precipitation, formation of a gas, odor change, temperature change

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3 years ago

Hydrogen gas is collected over water in an inverted buret. If the atmospheric pressure is 745 mm Hg, the vapor pressure of water

Varvara68 [4.7K]

Answer:

$P_{H_2}=727mmHg$

Explanation:

Hello there!

In this case, according to the given data, it is possible to infer that the gas mixture lies on the 15.0 cm-high column of water, so that the total pressure or atmospheric pressure is given by:

$P_{atm}=P_{water}+P_{H_2}$

Thus, since the atmospheric pressure is 745 mmHg and the vapor pressure of water is 18 mmHg, the pressure of hydrogen turns out to be:

$P_{H_2}=P_{atm}-P_{water}\\\\P_{H_2}=745mmHg-18mmHg\\\\P_{H_2}=727mmHg$

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3 years ago

A student makes a compound of sulfur and oxygen. She uses 5.00 g of sulfur and 4.99 g of oxygen, and all of the elemental substa

victus00 [196]

First, we apply the law of conservation of mass which states that the total mass in a system remains constant.
Therefore, there must be 5.00 g of sulfur and 4.99 g of oxygen in the product. Now, we determine the mass percentage using:

Mass % = (mass of sulfur x 100) / total mass of compound

Mass % = (5 * 100) / (5 + 4.99)

Mass % = 50.05%

The product contains 50.05% sulfur by mass.

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4 years ago

Calculate the kilograms of iron that would be produced from 1340 g of calcium carbonate.

Elanso [62]

Answer:

1.340kg

Explanation:

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3 years ago