What number of atoms of carbon is in 1.00-carat diamond

A student is running an experiment in which 40.0 grams of BeSO4 is needed, but the only jar of reagent in the lab is labelled beryllium sulfate tetrahydrate. How many grams of the hydrate must the student weigh out in order to get the desired amount of the anhydrous compound? g BeSO4 4H₂O

A scientist is trying to discover information about an unknown metal in a compound. The formula for the compound is believed to be XBr, where X is the unknown metal. The scientist determined that a 4.720 g sample of this compound contains 4.745 x 10-2 mol Br. Calculate the atomic mass of the unknown metal, X. atomic mass = amu What is the identity of the metal? Provide the name or symbol of the element. metal:

1212

What is the mass of 7.10 moles of magnesium chloride, MgCl2? Express your answer with the appropriate units. How many moles of nitrogen, N, are in 77.0 g of nitrous oxide, N2O? Express your answer with the appropriate units.

What mass of Na2CO3 would contain 2.50 x 1025 sodium (Na) atoms? Express your answer in units of grams using at least three significant figures. 4

1a) 1b)

Calcium nitrate (Ca(NO3)2) and ammonium fluoride (NH4F) react to form calcium fluoride (CaF2), dinitrogen monoxide (N2O), and water vapor (H2O). In one experiment, 16.8 g of calcium nitrate and 17.5 g ammonium fluoride were allowed to react completely. What mass of N2O was produced in the reaction?

What number of Ge atoms and what amount (moles) of Fe atoms are in 500.0 g of iron

Part A. What is the mass of 9.50 moles of magnesium chloride, MgCl2? Express your answer with appropriate units. Part B. How many moles of nitrogen, N, are in 76.0g of nitrous oxide, N2O? Express your answer with the appropriate units.