A substance Y has a melting point of -7°C and a boiling point of 63°C. At which temperature is Y a liquid?​

What happens when an acid dissolves?

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons