How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons?

An element Z contains 80% of \(^{16} _8\)Z and 20% of \(^{18} _8\)Z. Its relative atomic mass is

When the end alkyl groups of ethyl ethanoate are interchanged, the compound formed is

The part of the total energy of a system that accounts for the useful work done in a system is known as

Which of the following factors will speed up the rate of evolution of carbon (iv) oxide in the reaction below?
2HCl + CaCO\(_3\) → CaCl\(_2\) + H\(_2\)O + CO\(_2\)