How many molecules are in 0.200 g CO2? C= 12.01 g/mole and O = 16.00 g/mole

What number of molecules (or formula units) are present in 1.69 g of each of the following compounds? H ON a. molecules H b. molecules с. (NH4), Cr,0, formula units

Consider the reaction 4 Al + 3 O2 → 2 Al2O3. How many moles of O2 are needed to make 10.0 moles of Al2O2?

1. Determine the molar mass of (a) MgSO4. (NH4)2CO4 2. What is the percentage of Ca in CaSO4 3. How many moles of (a) C0₂ in 132g of CO₂ and (b) moles of O₂ in 128g O₂ 4. What is the Empirical formula of (a) Glucose, C6H₁2O6 and Cyclohexane C6H₁2 (b) + 5. How do you detect the presence of (a) NH4* ion; (b) CO32- ion; (c) SO4²- ion 6. Zn is 65.4g /mol, what is number of atoms for 0.2g of Zn using the Avogadro's number. 7. Consider the combustion reaction of methane, CH If 2.1 mol of methane is allowed to react with 4.0 mol of oxygen, which is the limiting reagent ? ● 8. Ethane, C₂H₂ react with O₂ to give CO₂ and H₂O. If 5 mols of Ethane is placed with 16 mols of O2, how many mols of CO₂ will be produced.