What is the mass of 9.44 × 10²⁴ molecules of NO₂? The molar mass of NO₂ is 46.01 g mol^-1.

Question

Quizplus · Accepted Answer

First, we need to calculate the mass of one mole of NOS1U1B12S1U1B0:

46.01 g/mol

Then, we can use this molar mass to convert the number of molecules into grams:

9.44 × 10S1U1P124S1S1P0 molecules x (1 mol/6.022 × 10S2U1P23S1S1P0 molecules) x (46.01 g/mol) = 720.9 g

Rounded to three significant figures, the answer is 721 g. Therefore, the correct choice is C.

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