How many molecules are in 17 liters of CO2 gas at stp

What’s the percent by mass of carbon in c10h14n2

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5