When water is heated from $0^{\mathrm{o}} \mathrm{C}$ to $4^{\mathrm{o}} \mathrm{C}$, its density _____. 

Identify the incorrect statement for the reaction $2{\mathrm{H}}_2\mathrm{S}+{\mathrm{SO}}_{2 }\to 3\mathrm{S}+2{\mathrm{H}}_2\mathrm{O}$ is:

(Atomic mass of $\mathrm{S}=32$)

The visible universe is estimated to contain ${10}^{22}$ stars. How many moles of stars are present in the visible universe.

What is the maximum number of states of matter?

The reaction of the burning of carbon in oxygen is represented by equation

$\mathrm{C}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right) \stackrel{}{\to } {\mathrm{CO}}_2\left(\mathrm{g}\right)+\mathrm{Heat}+\mathrm{Light}$

When 9.0 g of solid carbon is burnt in 16.0 g of oxygen gas the mass of carbon dioxide gas formed would be:

(Note: Atomic mass of C-12,o u, O=16.0 u)

The molecular mass of sulphuric acid is $98$. If $49$ g of the acid is dissolved in water to make one litre of solution, what will be the strength of the acid?

How many hydrogen atoms are contained in $1.50$g of glucose (C₆H₁₂O₆)?

The phenomenon of scattering of light by colloidal particles is called ______.