How many grams of hydrogen gas would be needed to form 8.0 grams of water? H2+O2=H2O

What is the law of conservation of energy as it applies to exothermic dissolution processes? Energy given off by the system during dissolution equals the energy absorbed by the surroundings.

What is the family number for helium?

Frank wants to make a simple electromagnet. Which of these does Frank need to have to create the electromagnet? A. iron filings B. light bulb C. battery D. magnet

Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed.

Four people are needed to lift a TV set with a single fixed pulley. How many people will be needed to lift the same TV set with a 2 fixed, 2 moveable pulley system? (Ignore friction.)

Convert 1.67 x10^24 atoms of carbon to moles of carbon

The knowledge of chemistry not important in one of the following? A, in agriculture B, in Geology C, in medicine D, none

Which is the balanced equation for: Al2O3 + Fe - Fe3O4 + AL

Why are lab apparatus made of ceramics

The volume of oxygen required for complete combustionof a mixture of 5 cm3 of ch4 and5 cm3 c2h4