How many valence electrons does a carbon atom have?

How many moles of mgs2o3 are in 229 compound?

Which of these chemical equations is correctly balanced? A. MnO4 + 2 C2H2O4 Mn + 2 CO2 + 4 H2O B. MnO4 + 3 C2H2O4 Mn + 6 CO2 + 4 H2O C. MnO4 + 4 C2H2O4 Mn + 8 CO2 + 4 H2O D. MnO4 + 6 C2H2O4 Mn + 12 CO2 + 12 H2O

what action forms a different chemical substance? A. crushing a rock B. burning a piece of wood C. mixing salt and pepper D. melting an ice cube

What 3 things can molecules moving with kinetic energy do?

If 63.8 grams of aluminum metal (Al) react with 72.3 grams of sulfur (S) in a synthesis reaction, how many grams of the excess reactant will be left over when the reaction is complete?

Does a mole of hydrogen have the same mass as a mole of oxygen? explain your answer.

A 0.500-L sample of H₂SO₄ solution was analyzed by taking a 100.0mL aliquot and adding mL of. After the reaction occurred, an excess of ions remained in the solution. The excess base required mL of for neutralization.

Ammonia can be prepared by the reaction of magnesium nitride with water. The products are ammonia and magnesium hydroxide. Write and balance the equation.

Which period is the shortest in the long form of the periodic table? Name all the elements in this period.

A mole of gas at 0.0oC and 760. torr occupies 22.4 L. What is the volume of this gas at 25. oC and 760. torr