Answer:
I deeply believe that it would be options 1, 2, and 4? Sorry if i'm wrong and good luck!
The equation for density is mass/volume. Make sure your units match what is given in the problem.
0.0782
You take the molar mass of Mg(OH)2 and divide 4.56 by that number and then make sure to round significant digits.
The 4 second rule is used to estimate your total stopping distance under ideal conditions.
Answer:
3%
Explanation:
We have heard about the clean water crisis, but how can that happen if earth mostly covered in water? Even though 70% of the earth is covered in water, most of those water is at ocean and has a high concentration of salt. We can't drink those water because the salt will take more water from our bodies. Freshwater only makes up about 2.5-3% water bodies while the ocean makes up 97% of the rest. Out of 3% freshwater, we have, only 1% of them that easily accessible.