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4 years ago

Heat is most closely related to which kind of energy?

Chemistry

2 answers:

n200080 [17]4 years ago

7 0

Thermal Energy

Explanation:

known as heat energy produced when a rise in temperature causes atoms and molecules to move faster and collide with each other.

Nadusha1986 [10]4 years ago

4 0

Answer:

radial energy because it's a heat energy!

Explanation:

There are more types but that's the closest in my opinion!!

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How much of Earth's atmosphere is made up of nitrogen and oxygen?

Archy [21]

<span>The right answer is the option B. Close to 99 percent. The atmosphere is a mixture of gases: nitrogen, oxygen, CO2, H2O, argon, among others. Nitrogen is about 78% and oxygen is about 21%, so they two together constitute about 99 percent of the Earth's atmosphere.</span>

3 0

3 years ago

Read 2 more answers

both sides in the war used military observers in hydrogen-filled balloons to watch the enemy's movements

lesya692 [45]

Answer:

Yes.

Explanation:

Hydrogen-filled balloons were widely used by the militaries during World War I (1914–1918). The main purpose of these hydrogen-filled balloons to detect movements of enemy troops and to provide direction to the artillery fire. Balloons were the targets of opposing aircraft because they knew the purpose of these balloons so they hit it whenever seen by the enemies so we can say that both sides used hydrogen-filled balloons as military observer to watch the enemy's movements.

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3 years ago

What is the density(in g/L) of a gas with a molar mass of 32.49g/mol at 2.569atm and 458K?

garri49 [273]

Answer:

$2.22~g/L$

Explanation:

According to the ideal gas law equation:

$pV = nRT$

Let's express the number of moles in terms of mass and molar mass:

$pV = \frac{m}{M} RT$

Let's divide both sides by volume:

$p = \frac{m}{MV} RT$

Notice that:

$\frac{m}{V} = d$

So the equation becomes:

$p = \frac{dRT}{M}$

Expressing density:

$d = \frac{pM}{RT}$

Substituting the given values:

$d = \frac{2.569~atm\cdot 32.49~g/mol}{0.08206~\frac{L~atm}{mol~K}\cdot 458~K} = 2.22~g/L$

7 0

4 years ago

The triple point of nitrogen occurs at a temperature of 63.1 K and a pressure of 0.127 atm. Its normal boiling point is 77.4 K.

yulyashka [42]

Nitrogen has a normal boiling point of 77.4 K and a melting point (at 1 atm) of 63.2 K. Its critical temperature is 126.2 K, and its critical pressure is 2.55 * 104 torr. It has a triple point at 63.1 K and 94.0 torr.

<h3>What is the triple point?</h3>

The temperature and pressure at which the solid, liquid, and vapour phases of a pure substance can coexist in equilibrium.

- Normal melting point: 63.2 K.

- Normal boiling point: 77.4 K.

- Triple point: 0.127 atm and 63.1 K.

- Critical point: 33.5 atm and 126.0 K.

In such a way:

- N2 does not exist as a liquid at pressures below 0.127 atm: that is because below this point, solid N2 exists only (triple point).

- N2 is a solid at 16.7 atm and 56.5 K: that is because it is above the triple point, below the critical point and below the normal melting point.

- N2 is a liquid at 1.00 atm and 73.9 K: that is because it is above the triple point, below the critical point and below the normal boiling point.

- N2 is a gas at 0.127 atm and 84.0 K: that is because it is above the triple point temperature at the triple point pressure.

Learn more about triple point here:

brainly.com/question/23307017

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5 0

2 years ago

1 mole solution of NaCl contains

Mamont248 [21]

Answer:

If you dissolve 58.44g of NaCl in a final volume of 1 liter, you have made a 1M NaCl solution, a 1 molar solution.

Explanation:

7 0

4 years ago