General Chemistry Answers

How many moles (of molecules or formula units) are in each samples?

23.1 kg kg  Fe (NO3) 2

Express your answer to three significant figures.

0.2346 g C8H18

Express your answer to four significant figures.

0.2346 g C8H18

Express your answer to four significant figures.

162 kg CaO

Express your answer to three significant figures.

How many oxygen atoms are in 1.60 g

g of quartz?

number of O atoms =

at STP, what mass of CH4 has the same number of molecules as 18.0 grams of H2O

Express each number in scientific notation

a) 12,500

b) 247

c) 10

d) 3,500,000

e) 1430

f) 0.135

g) 0.0024

h) 0.104

i) 0.0306

j) 0.00000072

how many litres of oxygen at STP react with 72 g of aluminum to produce aluminum oxide?

would dichloromethane molecule be polar if the hydrogen and chlorine atoms were placed at the corners of a rectangle surrounding carbon instead of in their actual locations?

The chemical reaction above releases about 2200 kJ of energy. How much energy is released when 2 moles of A₃B₈ combusts?

A 0.500 L sample of a 2.50M solution if K2CO3 contains what mass of potassium carbonate?

If you have 57 g of A₃B₈, how many moles of B₂C would be created? Where the atomic mass of A is 12 grams/mol and that of B is 1 gram/mol.

You have 2.75 moles of O2, how many moles of H2O will you make?