Which of the following is a way to conserve water quantity?

Buying bottled water
Reducing the amount of detergent used in the laundry
Decreasing the amount of electricity used for appliances
None of the above

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

Can someone me with questions 15 to 17 plz.

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025