2 years ago

Can you help me plz

Chemistry

1 answer:

ira [324]2 years ago

3 0

Answer:

convection

Explanation:

convection is the movement of a fluid (in this case air) as it rises and lowers in temperature

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Isotopes of the same element have different numbers of protons electrons neutrons

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Answer:

Protons and electrons

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3 years ago

Energy in a chemical reaction can be identified as which of the following?

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I believe it’s A..but I’m not quite sure.

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When a paper towel absorbs water, is it a physical or chemical change?

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2. If 1.75 L of a gas is at 700. K and is under 250. kPa of pressure, what will the new

Andrews [41]

Answer:

Final volume is 3.50L

Explanation:

It is possible to find volume of a gas using combined gas law:

$\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}$

Where P is pressure, V is volume and T is temperature of 1: initial state and 2: final state

If initial state of the gas is:

1.75L of a gas is at 700K and is under 250kPa of pressure

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298K and 53.2kPa.

Replacing:

$\frac{250kPa*1.75L}{700K} =\frac{53.2kPa*V_2}{298K}$

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3.50L = V₂

Thus, final volume is 3.50L

3 0

3 years ago

Dima020 [189]

The correct answer is b hope this helps air

5 0

2 years ago

Can you help me plz ​

Can you help me plz