Sarah measures out 151 grams of SO2. How many moles is this? Express your answer to three significant figures.
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Answer:
150 g so₂ = 2.36 mol so₂
m_r = 32.06 + 2×16.00 = 32.07 + 32.00 = 64.06
moles of so₂ = 151 g so₂ × [1 mol so₂/64.06 g so₂] = 2.36 mol so₂
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