How many atoms are in a 450 gram sample of magnesium?​

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

Distilled water is a completely neutral solution. what is its ph? a. 1 b. 7 c. 14 d. 0

How does water evaporating from a glass show that matter is made up of particles? a. the heat energy from the air causes the glass to fill up with water particles. b. the liquid water particles turn into water vapor that spreads in the air. c. the particles of the glass dissolve in water and cause it to evaporate. d. the tiny particles of the glass evaporate and seem to disappear.