Use mass number in a sentence

How many molecules of nitrogen gas are in 22.4 L? A. 6.022 * 10^22 B. 6.022 * 10^23 C. 6.022 * 10^24 D. 6.022 * 10^25

Upon decomposition, one sample of magnesium fluoride produced 0.764 kg of magnesium and 1.19 kg of fluorine. A second sample has a total mass of 5.75 kg. How much magnesium did the second sample produce?

How many grams of oxalic acid dihydrate H2C2O4 ·2H2O, a diprotic acid, are needed to react with 20.00 mL of 0.4500 M NaOH?

Styrene has the empirical formula CH. It has a molar mass of 104 g. What is the multiplier to get the molecular formula?

Balance HCN+CuSO4"H2SO4+Cu (CN) 2

The compound KOH is called

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?

If 100 mL of a gas were enclosed in a buret at 500 mm Hg, what volume would the gas occupy at 1000 mm Hg at the same temperature? P1V1=P2V2

Would Mn (HPO4) 2 be manganese (II) monohydrogen phosphate?

The fundamental frequency of a violin string is 440 hz. the frequency of its second harmonic is