AP Chemistry Composition of Substances and Solutions — practice questions
25 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP Chemistry Composition of Substances and Solutions in the app →To count atoms easily, how can the formula of calcium phosphate, Ca3(PO4)2, be rewritten in a simpler format?Calcium phosphate, Ca3(PO4)2, has a formula mass of 310.18 amu. What is the mass of 0.500 mol of calcium phospWhat is the mass of 0.443 mol of hydrazine, N2H4? Use N = 14.007 and H = 1.008 g/mol.A prospector collects 15.00 g of pure gold. Given that 2.561 mol of gold has a mass of 504.4 g, how many Au atThe approximate minimum daily requirement of the amino acid leucine, C6H13NO2, is 1.1 g. How many moles is thiA 55 kg woman has 7.5 x 10^-3 mol of hemoglobin, molar mass 64,456 g/mol, in her blood. What mass of hemoglobiA 55 g serving of cereal supplies 270 mg of sodium, which is 11% of the recommended daily allowance. How many Aluminium sulfate, Al2(SO4)3, has a formula mass of 342.14 amu. How many moles are in 78.452 g of it?When a formula is being determined from measured element masses, why must each mass first be converted to moleA compound sample contains 1.71 g of carbon and 0.287 g of hydrogen. What is its empirical formula? Use C = 12A compound is 49.47% C, 5.201% H, 28.84% N and 16.48% O by mass, with a molecular mass of 194.2 amu. What is iTea sweetened to a sucrose molarity of 0.05 M is poured out. What volume of the tea holds 0.004 mol of sucroseWhat volume of a 1.50 M KBr solution contains 0.555 mol of KBr?What is the molarity of a solution holding 7.0 x 10^-3 mol of iodine, I2, in a total volume of 100.0 mL?A solution contains 0.444 mol of CoCl2 in 0.654 L. What is its molarity?A 0.150 L sample of 0.556 M NaCl is left to evaporate until only 0.105 L remains. What is the new concentratioA laboratory needs 250 mL of 2.00 M HCl. How many millilitres of 11.9 M HCl must be diluted to prepare it?What volume of a 1.00 M Fe(NO3)3 stock can be diluted to prepare 1.00 L of a 0.250 M solution?If 4.12 L of 0.850 M H3PO4 is diluted to a final volume of 10.00 L, what is the resulting concentration?D5W intravenous fluid is 5.0% dextrose, C6H12O6, by mass and has a density of 1.029 g/mL. Taking the molecularLiquid bleach is 7.4% sodium hypochlorite by mass. What mass of NaOCl is in a 250.0 g bottle of the bleach?The EPA maximum safe level of fluoride ion in tap water is 4 ppm. At that level, what mass of fluoride is in 1Aspirin is C9H8O4 with a molar mass of 180.159 g/mol. Using H = 1.008 g/mol, what is its mass percentage of hyWhat is the mass of 0.600 mol of ozone molecules, O3? Use O = 16.00 g/mol.In ammonia, NH3, the three hydrogen atoms together weigh 3.024 amu and the formula mass is 17.03 amu. What is