what is the mass in grams of 5.40 moles of lithium?

you have 10.0 g each of Na, C, Pb, Cu and Ne. which contains the largest number of moles?

how many moles are there in 17.5 grams of sodium?

how many moles of bromine gas are in 37.7 grams?

how many hydrogen atoms are in 35.0 grams of hydrogen gas?

how many moles of Pb are in 4.71 * 10 x²¹ Pb atoms?

in comparing a balloon containing 25 grams of helium to a balloon containing 25 grams of neon, which one of the following statements is TRUE?

which of the following contains 9.02 * 10²³ atoms?

what is the molar mass of aluminium sulfate?

calculate the molar mass of calcium nitrate.

how many molecules of nitrogen monoxide are in a 22.5 gram sample?

one mole of (NH₄)₂HPO₄ contains how many moles of hydrogen atoms?

one mole of potassium sulfate contains:

how many moles of fluorine are in 3.2 moles of xenon hexafluoride?

a 15.5 gram sample of phosphorous pentoxide contains how many grams of phosphorous?

an iron ore sample is found to be 35.00% Fe by mass. how many grams of ore are needed to obtain of Fe?

a 500 gram iron ore sample was determined to contain 242 grams of iron. what is the mass percent of iron in the ore?

what is the mass percent of hydrogen in water?

what is the mass percent of carbon in oxalic acid, H₂C₂O₄?

which of the following statements about empirical formulas is incorrect?

the simplest formula for hydrogen peroxide is HO. to determine its molecular formula, it is necessary to know:

which of the following is already in its empirical formula?

a chromium oxide compound contains 104.0 grams of chromium and 48.0 grams of oxygen. what is the most likely empirical formula of this compound?

determine the empirical formula of a compound containing 83% potassium and 17.0% oxygen.