Answer:
This question lacks options, the options are:
A. 2.89 x 1022
B. 8.66 x 1022
C. 3.66 x 1023
D. 1.10 x 1024
E. 3.29 x 1024
The answer is C. 3.66 × 10^23
Explanation:
In the chemical compound given as follows: Co2(HPO4)3, hydrogenphosphate ion is (HPO4)3.
Number of moles of hydrogenphosphate ion can be calculated using the formula
mole (n) = mass (m) /molar mass (MM)
Molar mass of (HPO4)3;
{1 + 31 + 16(4)}3
= {32 + 64)3
= (96)3
= 288g/mol
mole = 175/288
mole = 0.6076
mole = 0.607mol
The formula of units of hydrogenphosphate ion can be calculated by multiplying number of moles by Avogadro's number (6.022 × 10²³)
6.022 × 10²³ × 0.607
= 3.655 × 10²³
= 3.66 × 10²³
I think it's either b or c
Smaller, there are many human and systematic errors that can alter the amount of product that can be obtained.
Answer:
The total water content in the earth remains nearly constant.
Explanation:
- The amount of water on earth is nearly same as the amount of water that was on earth in Mesozoic era.
- Plants and animals use water as a raw material in their growth, but that water is eventually returned to earth.
- When the UV light breaks the water molecules in higher atmosphere, some water is lost.But it is compensated by the water that enters the earth through meteors and comets.
- The water content is not constant but through the series of biochemical reactions,the water level is nearly the same.
