20 cm3 of 1.0 molar NH4OH solution when neutralized with 20.05cm3 of 0.1 molar HCl liberated -102 joules of heat. Calculate the heat of neutralization of NH...

10cm3 of hydrogen fluoride gas react with 5cm3 of dinitrogen difluoride gas (N2F2) to form 103 of a single gas. Which of the following is the most likely equ...

The relationship between the velocity (U) of gas molecules and their relative molecular mass (M) is shown by the equation

An element with atomic number twelve is likely to be

Which of the following groups of physical properties increases from left to right of the periodic table? i. Ionization energy ii. Atomic radius iii. Electron...

The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as?

The number of atoms of chlorine present in 5.85g of NaCl is [Avogaro's Number = 6.02 x 1023]

When 50cm3 of a saturated solution of sugar (molar mass 342.0g) at 40oC was evaporated to dryness, 34.2g of dry solid was obtained. The solubility of sugar a...

How much of magnesium is required to react with 260cm3 of 0.5 M HCl? [Mg = 24]