chemistry
May 29th, 2022
Question 12 pts<p>The molar mass of CuSO<sub>4</sub>.5H<sub>2</sub>O is 249.69 g/mol. A student measured out 4.9938g CuSO<sub>4</sub>.5H<sub>2</sub>O. How many moles of water molecules are present in the sample?</p>
The molar mass of CuSO4.5H2O is 249.69 g/mol. A student measured out 4.9938g CuSO4.5H2O. How many moles of water molecules are present in the sample?
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Question 22 pts<p>Caffeine has a molar mass of 194.19 g/mol, and a mass percentage composition of 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen and 16.48% oxygen. What is the molecular formula of caffeine? (Format of the answer should be like: C3H3N3O3)</p>
Caffeine has a molar mass of 194.19 g/mol, and a mass percentage composition of 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen and 16.48% oxygen. What is the molecular formula of caffeine? (Format of the answer should be like: C3H3N3O3)