STEM 11 1.How many moles of carbon dioxide does 250 grams of the substance have? How many molecules of CO2 are there?
2. Determine the percent composition of each element in the compound in tartaric acid (C4H6O6)
3. What are the empirical and molecular formula of a compound that is 40.27% potassium, 26.78%
chromium, and 32.95% oxygen?
4. Balance the following equations
1. _ C + _ O2 → ___ CO
2. _ Mg + _ O2 → _ MgO
3. _ H2O2 → _ H2O + _ O2
4. _ CH4 + O2 → _ CO2 + _ H2O
5. _ N2O5 → _ N2O4 + _ O2