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

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas. in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

Right anwser gets marked brainliest newton's discovery concerning how fast an object will change speed is the: 1st law 2nd law 3rd law universal gravitation