What are three of Leonardo divinci's contributions to science?

Electrons and protons (attract/repel) each other

A scientist is mixing a chemical for a solution foe an experiment. The solution contains 5/8 ounce of water and 1/6 ounce of saline. What is the unit rate of water to saline solution?

What makes up oxygen?

Who discovered infrared light

The standard molar volume of a gas at STP is

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s) + N2 (g) → 2Li3N (s) How many moles of lithium are needed to produce 0.60 mol of Li3N when the reaction is carried out in the presence of excess nitrogen?

7. Convert 5.2 cm of magnesium (Mg) ribbon to mm of Mg ribbon.

If you place a crystal substance on a tabletop, return to view it after some time passes, and find it as a powdered substance, which of the following processes most likely took effect? A. Efflorescence B. Distillation

What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?

Calculate the molar mass for HCN. 0.2703 g/mol 2.703 g/mol 27.03 g/mol 270.3 g/mol