What occurs when a substance melts

Metals lose electrons and become

What volume (mL) of a concentrated solution of sodium hydroxide (6.00 M) must be diluted to 200.00 mL to make a 1.50 M solution of sodium hydroxide?

In a car piston shown above, the pressure of the compressed gas (red) is 5.00 atm. If the area of the piston is 0.0760 m^2. What is the force exerted on the piston in Newtons (N) ?

A change in the identity of a substance where a new substance is formed

The half reaction of an oxidation-reduction shows that iron gains electrons. What does this electron gain mean or iron?

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.