Explanation

ہائیڈرو جن کا کیمیائی فارمولا H ہے۔

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RY 13-01-2023

Explanation

Hydrogen is the most abundant element in the Universe.

Helium is second making up almost all of the remaining 25%. Oxygen is third most abundant element of universe.

Hydrogen and helium are by far the most abundant elements found in the Sun, making up about 98 percent of its mass.

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FIA VU ASSISTANT  02-01-2022

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

Given numbers. of molecules are, 3.01 *10^22 so

using the formula:

no. of mole = given no. of molecule /avagadro no.

so, here

no of mole. = 3.01*10´22/ 6.022*10´23

0.04998339422 mole.

Explanation

Schonbein (1840) concluded that Van Marums observations in 1785 of a peculiar smell,

when an electric discharge was passed through oxygen (or air), was in fact a new gas.

He named it Ozone,

which is derived from a Greek word ozoaterr meaning smell.

Soret in 1860, assigned the molecular formula O3.

Explanation

Potato chips packets are filled with air but with NITROGEN GAS.

This is done to prevent Oxidising which ultimately results in stale.

Explanation

The most popular renewable energy sources currently are:

1.      Solar energy

2.      Wind energy

3.      Hydro energy

4.      Tidal energy

5.      Geothermal energy

6.      Biomass energy

RK12-12-2022

Explanation

Infrared radiation is strongly absorbed by water and by the atmosphere.

Although invisible to the eye, infrared radiation can be detected as warmth by the skin.

Nearly 50 percent of the Sun's radiant energy is emitted in the infrared region of the electromagnetic spectrum, with the rest primarily in the visible region.

Explanation

This relationship is called Boyle's Law and makes up part of the ideal gas law.

When the volume of a gas shrinks, the gas molecules have less space to move around and so they hit their container.

Explanation

•  Water Extinguishers are used for Solids
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• Water extinguishers are very common and should be used on solid materials only.
• This can include paper, wood, or any other solid fuel.
• Water-based extinguishers are essentially filled with water and use compressed air to help this come out.
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• Solid Material fire is called A class fire and Water is often used on it.