3 years ago

Can Air can be warmed or cooled by the surface below

1 answer:

3 0

I believe it can be warm because usually the surface below us is warm itself, causing the air to be warm as well. The temperature can vary as well

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The mass of the quartz crystal shown below is 10 grams, and its volume is 4 cm3. What is the density of quartz?

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Answer:

${\boxed{\text{b. 2.5 g/cm}^{3}}}$

Explanation:

$\text{Density} = \dfrac{m}{V} = \dfrac{\text{mass}}{\text{volume}}$

Data:

m = 10 g

V = 4 cm³

Calculation:

$\text{Density} = \dfrac{\text{10 g}}{\text{4 cm}^{3}} = \textbf{2.5 g/cm}^{3}\\\text{The density of the crystal is ${\boxed{\textbf{2.5 g/cm}^{3}}}$}$

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A. 24.5 g of ammonia NH3 = how many moles of ammonia?

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23.9 11.00 would be the wrong answer because I guessed

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Answer:

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Explanation:

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Ammonia = NH₃

Hydrochloric Acid = HCl

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In decomposition reaction, the reactant is breaking down into smaller parts. In this case, all of the coefficients are 1. The reaction is already balanced.

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1 year ago

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