A)Calculate the percent by mass of each element (H and O) in water (H2O): b)Calculate the mass of hydrogen in your 50.0 mL of water. |
c)Calculate the mass of oxygen in your 50.0 mL of water.
d)Use the density of water to calculate the volume of one mole of water, in mL.
one mole of water is 50 ml
e)One swallow of water is about 20 mL of water.
f)How many moles of water are in one swallow?
g)How many molecules of water are in one swallow?

Blank allows you to do calculations for situations in which only the amount of gas is constant a)boyle's law b)combined gas law c)ideal gas law d)dalton's law

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.