Answer:
cause it has more
space between molecules.
O C. Ice has a higher density than li
Explanation:
Answer: 1. 
2. 
3. .
4.
has highest nitrogen content.
Explanation:
To calculate the mass percent of element in a given compound, we use the formula:
1.

2.

3.

4.

Thus
has highest nitrogen content of 82.4%.
Answer:
Rotting vegetation and erupting volcanoes release some chemicals that can cause acid rain, but most acid rain is a product of human activities. The biggest sources are coal-burning power plants, factories, and automobiles.
Answer:
A
Explanation:
When you add the water, KNO3 will be in solution, but sand is not soluble.
So, we can use filtration.