How would I determine the formula of butane as they ask in question #7? I've found that the molar mass of butane gas is 0.574 g/mol by dividing the mass of butane (0.1027 g) by the number of moles of butane (0.179 mol).

Determine the mass of each of the following: 2.345 mol LiCl 0.0872 mol acetylene, C2H2 3.3102 mol Na2CO3 1.23103 mol fructose, C6H12O6 0.5758 mol FeSO4(H2O)7

Use a factor derived from the relationships written in Exercise 2.43 and the factor-unit method to determine the following: a.The number of moles of beryllium in a 10.0g sample of beryllium b.The number lead atoms in a 2mol sample of lead c.The number of sodium atoms in a 50.0g sample of sodium

Saccharin, a molecular model of which is shown below, is more than 300 times sweeter than sugar. It was first made in 1807, when it was common practice for chemists to record the taste of any new substances they synthesized. (a) Write the molecular formula for the compound, and draw its structural formula. (S atoms are yellow.) (b) If you ingest 125 mg of saccharin, what amount (moles) of saccharin have you ingested? (c) What mass of sulfur is contained in 125 mg of saccharin?

The most common form of nylon (nylon-6) is 63.68% carbon, 12.38% nitrogen, 9.80% hydrogen, and 14.14% oxygen. Calculate the empirical formula for nylon-6 .

Use the average atomic masses given inside the front cover ofthis book to calculate the mass in grams of each of the following samples. l type='a'> 0.00552 mole of calcium 6.25 mmol of boron (1mmol=11000mole) i>135 moles of aluminum 1.34107 moles of barium 2.79 moles of phosphorus 0.0000997 mole of arsenic