General Chemistry Answers

what is the ratio of diffusion of the following:

A. Ne and Ar

B.PH3 and NH3

C.C4H10 and C2H4

Thermite reaction is necessary to produce molten iron. this reaction involves Fe3O4 and Al and is described by:

8 Al + 3 Fe3O4 --> 9 Fe + 4 Al2O3

If 198.5 g Al and 365.5 g Fe3O4 are used, what mass of the excess reagent remains unused at the end of the reaction?

How many grams of KOH would be needed to make 50.0 mL of a 3.00 M KOH solution? 

What molarity of sugar water would be made if you diluted 100.0 mL of 6.0 M sugar water solution to a total volume of 500.0 mL? 

How much heat is evolved when 1249 g of water condenses to a liquid at 100.°C?

A sample of oxygen gas occupies a volume of 0.250 L at 740 torr pressure. What volume will it occupy at 800 toor pressure?

Pentane is burnt with 96000 cm3 of oxygen gas at room temperature and pressure.

a) write the balance chemical equation for the reaction.

b) calculate the volume of carbon dioxide in cubic centimeters produce in the reaction at room temperature and pressure

c) calculate the mass of zinc needed to react with 50 cubic centimeters of 0.8 M of Hydrochloric acid

Determine the number of moles of Pd in 4.80 x 10²¹ atoms of Pd.

nitric oxide?

What mass of CaH3N can be made when 21.6 g of CaH6 react with 21.6 g of

C5H12 (l) + 8O2 (g) → 5CO2 (g) + 6 H2O (g)

1. Given 4.3 x 1024 atoms of oxygen (O), how many moles of carbon dioxide (CO2) are present? Answer with 2 sig figs.