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shtirl [24]
3 years ago
12

Where do molecules humans need come from

Chemistry
1 answer:
grigory [225]3 years ago
6 0

Answer:

manila hahaha

i dont now

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Calculate the mass of 9.0x10^17 molecules of He gas at STP
Brrunno [24]
6,02*10^{23} \ \ \ \ \ \rightarrow \ \ \ \ 4g \ He\\
9,0*10^{17} \ \ \ \  \ \ \rightarrow \ \ \ \ m_{x}\\\\
m_{x}=\frac{9*10^{17}*4g}{6,02*10^{23}}\approx5,98*10^{-6}g
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3 years ago
A balloon occupies 1.50 L with 0.205 mol of carbon dioxide. How many moles would be required to increase the size of the balloon
Gekata [30.6K]

Answer:

0.683 moles of the gas are required

Explanation:

Avogadro's law relates the moles of a gas with its volume. The volume of a gas is directely proportional to its moles when temperature and pressure of the gas remains constant. The law is:

V₁n₂ = V₂n₁

<em>Where V is volume and n are moles of 1, initial state and 2, final state of the gas.</em>

<em />

Computing the values of the problem:

1.50Ln₂ = 5L*0.205mol

n₂ = 0.683 moles of the gas are required

<em />

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