Explanation

Similarly, you could input the percentages normally and then divide by $100$:

${\text{M}}_r\left(\text{Ga}\right)=\frac{(68.9256\cdot 60.108)+(70.9247\cdot 39.892)}{100}$

${\text{M}}_r\left(\text{Ga}\right)=69.7231\text{to 4 decimal places}$

Explanation

The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure.

Explanation

Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.

Explanation

Oxygen is necessary for combustion.

Explanation

The molecules in a solid are closely packed together and contain the least amount of kinetic energy. 

Explanation

Temperature increases the kinetic energy of the molecule and hence more collision between molecules will takes place as velocity or particles gets increased hence reaction rate will increases.

Explanation

Sound travels at different speeds depending on what it is traveling through. Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solids.

Temperature also affects the speed of sound.

Explanation

Kerosene, is a combustible hydrocarbon liquid which is derived from petroleum.

It is widely used as a fuel in aviation and households.

Explanation

The symbol of mercury is Hg .

Freezing point of mercury is -38.83C.

Boiling point of Mercury is 356.7 C.

Explanation

Effusion refers to the movement of gas particles through a small hole from a region of high pressure to a region of low pressure.

This phenomenon occurs when gas molecules escape through a tiny opening, often without significant interaction with other molecules.