Abalance is used to determine: my answer is a weight mass gravity

A balance is used to determine accurate mass of substances.

Explanation: Electronic balance is used to measure the small to large mass of substance from miligrams to grams to kilograms according to their features. Differnt different Electronic balances are used on the basis of amount to be measure.

In pharmaceuticals , other laboratories , schools , colleges mainly electronic balance is used , as it measure accurate weight of the substances.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).