The air outside a classroom has a dry-bulb temperature of 10°C and a wet-bulb temperature
of 4°C. What is the relative humidity of this air?
(1) 1%
(3) 33%
(2) 14%
(4) 54%
PLEASE ANSWER ASAP!!

Part 1: 2KNO3 → 2KNO2 + O2 is the balanced equation.

Part 2: The conversation of mass that demonstrates that there is  no detectable change in the total quantity of matter present in the

Explanation:

Part 1: To balance a chemical equation, the number of atoms in the reactants and the products must be equal. So, the coefficient 2 added before KNO3 and KNO2 to balance the equation.

2KNO3 → 2KNO2 + O2

Part 2:

This chemical reaction demonstrates the conversation of mass that demonstrates that there is  no detectable change in the total quantity of matter present when chemical change occurs (matter converts from one type to another) or physical change occurs (changes among solid, liquid, or gaseous states).

This is clear in the balanced equation.