What is the periodic table

Given: SnO2 + 2H2 → Sn + 2H2O Tin oxide reacts with hydrogen to produce tin and water. How many moles of SnO2 are needed to produce 500.0 grams of Sn?

Which of the following molecule (s) is (are) polar? CO2, CH4, CBr4, or CHBr3

For 4NH3 (g) + 5O2 (g) → 4NO (g) + 6H2O (g), if you begin with 16.00 g ammonia and excess oxygen, how many grams of water will be obtained?

Why can ionic table salt and covalent rubbing alcohol both dissolve in water? Alcohol's polar bonds and salt's ions have higher potential energy than the potential energy of the hydrogen bonding between water molecules.

Which group iia metal magnesium or calcium is more active cite your evidence?

What is the pH of a solution with a hydrogen-ion concentration ([H+]) of 8.7 x 10-6M? Is this acidic or basic?

What are three types of beta decay

Bacteria and protists are primarily unicellular organisms. How do bacteria and unicellular protists differ? Options: A) Protists have a single chromosome in a nuclear region, but no nuclear membrane.

A solution contains 0.159 mol K3PO4 and 0.941 molH2O. Calculate the vapor pressure of the solution at 55 ∘C. The vapor pressure of pure water at 55 ∘C is 118.1 torr. (Assume that the solute completely dissociates.)

When 711 J of heat is added to a 41.1 g of an unknown metal, the temperature of the metal increases from 22oC to 94oC. Calculate the specific heat of this metal