70 points chemistry need it to be done asap if you know the answer

question 1
in a solution, there is 1 g of nacl for every 5 g of water.

what is the ratio of sodium to water?

a)1nacl : 6h2o, because the mass of the solution equals 1 g of nacl
b)1nacl : 5h2o, because in the solution, for every 1 g of nacl there are 5 g of h2o
c)6nacl : 1h2o, because the total mass of the solution will be 1 g of h2o
d)5nacl : 1h2o, because in the solution, for every 5 g of h2o there is 1 g of nacl

question 2
how many mol of potassium (k) are present in cereal that claims to have 7.00 g of potassium per serving?
2.7^4 × 10^2 g k
1.7^9 × 10^–1 g k
3.1^3 × 10^–1 g k
1.5^7 × 10^1 g k

question 3
how many particles are in 1.40 x 107 mol of aluminum (al)?

(hint: remember that there are 6.02 x 1023 particles in a mol of an element.)

2.3^3 × 10^–17 particles al
8.4^3 × 10^30 particles al
3.7^8 × 10^8 particles al
6.2^5 × 10%5 particles al

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.