Match the assumption with the correct unit of concentration. 1- Molarity
2- Molality
3- mass %
4- mole fraction
5- parts per a million(ppm)
A. 1 kg of solution
B. 1 g of solute
C. 100 g of solute
D. 1 mole solute
E. 1L of solute
F. 100 g of solution
G. 1 mole of solvent
H. 1L of solvent
I. 1 mole of solution
J. 1 kg of solvent
K. 1 g of solution
L. 1L of solution
M. 1 kg of solute

1. D/E

2. D/J

3. B/F

4. D or G/I

5. A

Explanation:

This is about sort of concentrations:

1- Molarity

Moles of solute in 1 L of solution

(we can also say, mmoles of solute in 1 mL)

2- Molality

Moles of solute in 1kg of solvent

3. mass %

grams of solute in 100g of solution

4. mole fraction

moles of solute or solvent per moles of solution

5. ppm

mg of solute in 1kg of solution

(we can also say μg of solute in 1 g of solution, or mg solute in 1L of solution)

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.