Which of the following is an example of a phase change from solid to liquid?

A shining metal M, on burning gives a dazzling white flame and changes to a white powder N. a) Identify Mand N. b) Represent the above reaction in the form of a balanced chemical equation.

A sponge and a bar of soap occupy the same amount of space, but the soap is much more dense than the sponge. Why is that?

Which is a property of every heterogeneous mixture? a. The mixture is made up of at least two different states. b. The mixture is made up of something dissolved in a liquid. c. The composition of the mixture is the same throughout. d.

Substance in which all atoms are alike

How many carbons are in a molecule of hexane?

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.0 L of water upon warming from 25 ∘C to 50 ∘C.

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure.

When you light a fire place what energy transformation takes place

Correctly identify the generic formula for a synthesis reaction. a. AB + A+B b. A+B → AB c. CxHx + O2 → CO2 + H2O d. AB + C + AC + B e. AB + CD → AD + CB

Zinc phosphide, Zn3P2, is often used as a rat poison. Phosphorus has 5 valence electrons. How many valence electrons does each zinc atom lose?