Measurement of Matter and Uncertainty in Measurement

Density of a gas relative to air is $\frac{1}{3.625}$. Find the mol. mass of the gas $\left[{\mathrm{M}}_{\text{air }}=29 \mathrm{g}/\mathrm{mol}\right]$

Which of the following device is a volume measuring device?

If a pressure of gas is increases, so what will be the volume of gas.

Describe briefly the volume measuring devices like burettes and pipettes in a laboratory.

 Measuring a volume of a liquid with a measuring cylinder is not a good laboratory technique. Give reasons.

Describe briefly the volume measuring devices like beakers, graduated cylinders and volumetric flasks in the laboratory.

The SI unit of volume is cubic centimetre.

Identify the SI unit of volume:

Which of the following is mass unit in metric system?

The world's most widely used system of measurement is

Which of the following is correct?

Which of the following is independent on gravity?

$4\times {15}^3-2\times {10}^2$ is 

What is the metric system in chemistry?

Define Mass and Weight?

The number of significant figures are present in $208$ is _____.

The number of significant figure in$0.000320$ is

Prefix Giga means:

Given the number: $161 \mathrm{cm}; 0.161 \mathrm{cm}; 0.0161 \mathrm{cm}$. The number of signification figures for three numbers is: