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Q.

What is the mass of CO2 that contains 3.011 ×1023 molecules?

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a

44.0 g

b

4.4 g

c

11.0 g

d

22.0 g

answer is B.

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Detailed Solution

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We are told that Carbon Dioxide contains 3.011 x 1023 molecules and that we must calculate its mass, for which we have a formula.
n= N/NA
Here, n represents the number of moles, N represents the number of molecules, and NA is the value of Avogadro's Number, which is 6.022 × 1023.
We will obtain this by entering values

n = 0.5 mol

We now understand,
n = m/M
Here, n represents the number of moles, m represents the substance's mass, and M represents its molecular mass.
We have been given The molecular mass of carbon dioxide is 44gms.
When we enter values, we get
m = 0.5×44 = 22gms

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What is the mass of CO2 that contains 3.011 ×1023 molecules?