Problem 1
a. Determine the mass of \(0.752\) mol of \(\mathrm{H}_{2}\) gas. b. How many moles of molecular hydrogen are present in \(6.022\) grams of \(\mathrm{H} 2 ?\) c. If you have \(22.414\) grams of Cl2, how many moles of molecular chlorine do you have?
Problem 1
a. A compound is determined to have a molar mass of \(58.12 \mathrm{~g} / \mathrm{mol}\) and an empirical formula of \(\mathrm{C}_{2} \mathrm{H}_{5}\); determine the molecular formula for this compound. b. Benzene is an intermediate in the production of many important chemicals used in the manufacture of plastics, drugs, dyes, detergents and insecticides. Benzene has an empirical formula of CH. It has a molar mass of \(78.11 \mathrm{~g} / \mathrm{mol}\). What is the molecular formula?
Problem 1
a. Find the percentage of fluorine in calcium fluoride (CaF2).
Problem 1
Find the molar mass of each of the following compounds: Sand, silicon dioxide (SiO2) Draino^{TM} , \text { sodium hydroxide } ( \mathrm { NaOH } ) Nutrasweet \(^{\mathrm{TM}}\), Aspartame (C \(\left._{14} \mathrm{H}_{18} \mathrm{~N}_{2} \mathrm{O}_{5}\right)\) Bone phosphate, calcium phosphate Ca3(PO4)2
Problem 1
a. It is estimated there are \(7 \times 10^{22}\) stars in the universe. How many moles of stars is this? b. It is estimated there are \(7.5 \times 10^{18}\) grains of sand on the earth. How many moles of sand grains is this? c. You have \(0.0555\) moles of jelly donuts. What number of donuts would that be? d. You drink a small bottle of drinking water that contains 13 moles of water. What is the number of molecules of water you drank?