Question

Gas pressure is caused by:
A.) too many gas molecules in a gas tank
B.) too few gas molecules in a gas tank.
C.) collsions of the gas particles with the walls of the tank
D.) an increase in temperature.
What is the molarity of a solution prepared by dissolving 20grams of sodium hydroxide (MW = 40g/mol) in water and diluting to 1.0L?
A.) 0.25M
B.) 0.50M
C.) 1.0M
D.) 2.0M
The solute in a solution...
A.) is the substance being dissolved.
B.) is the substance being dissolved.
C.) is the solute plus the solvent.
D.) is the solvent plus the solution.

Answer 1

C , A, (M=n/V --> if in 40g iI have 1 mol, in 20g I have 0.5 mol. so M=0.5/1L= 0.25M, A and B, is the substance being dissolved.

Answer 2

Thanks so much @diogop110

Answer 3

=)

Answer 4

I have another question can you help me?