Which statement is correct?
.
O
The volume of 1 mol of CO2 is greater than that of 2 mol of Oz.
The volume of 1 mol of CO2 is greater than that of 1 mol of Nz.
The volumes of 2 mol of O2 and 1 mol of N, gases are the same.
The volumes of 1 mol of CO2 and 1 mol of N, gases are the same.

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

What is a number added in front of a formula in order to balance the equation