Question

please solve the 3 one.

please balance the equation.​

Answer 1

Explanation:

k2Cr2O7+2KOH -------- 2k2CrO4+H2O

reactant. product

K. 4. 4

Cr. 2. 2

H. 2. 2

O. 9. 9

Answer 2

Explanation:

Nitrogen is considered as an essential element because it helps plants and animals in growth and reproduction. It is also an important part of proteins and DNA that is found in our cells. Plants cannot take in Nitrogen directly from the air. Plants acquire nitrogen with the help of a bacterium known as Rhizobium.