5. What mass of Na2SO4 is needed to make 2.5 L of 2.0 M solution?
178 g
284 g
356 g
710 g
6. The volume of 6.00M HCI needed to make 319 mL of 6.80M HCi is ___.
0.128 mL
7.8 mL
281 mL
362 mL
7. If the percent for a solute is 4% and the mass of the solution is 200 g, what is the mass of the solute in solution?
8.0 g
50 g
80 g
800 g
8. Colligative properties depend upon the ____.
nature of the solute
nature of the solvent
number of solute particles in a solution
freezing point of a solute
12. Which compound can act as both Bronsted-Lowry Acid and a Bronsted-Lowry Base?
water
ammonia
sodium hydroxide
hyrdrochloric acid
15. Which type of solution is one with a pH of 8?
acidic
basic
neutral
the type varies, depending on the solution
17. A 0.12 M solution of an acid that ionizes only slightly in solution would be termed _____?
Concentrated and weak
strong and dilute
dilute and weak
concertrated and strong
(Please help me)
From periodic table , add
2 sodium
1 sulfur
4 oxygen
then multiply x 2 and then multiply x 2.5 for the first one......