An enzyme is: a. A biological reactant b. A biological product c. A biological catalyst d. a biological co-factor

Do all the molecules in 1 mol sample of oxygen gas have the same energy at 273 K?

If 2.00 g of Zn is allowed to react with 2.00 g of CuSO4, how many grams of Zn will remain after the reaction is complete? CuSO4 (aq) + Zn (s) - > ZnSO4 (aq) + Cu (s)

Shifting the layers of an ionic crystal causes the crystal to

A 0.3146-g sample of a mixture of nacl (s) and kbr (s) was dissolved in water. The resulting solution required 45.30 ml of 0.08765 m agno3 (aq) to precipitate the cl - (aq) and br - (aq) as agcl (s) and agbr (s).

the absolute tempertaure of a gas is increased four times while maintaining a constant volume. what happens to the pressure of the gas

High-purity silicon is obtained using a three-step process. the first step involves heating solid silicon dioxide, sio2, with solid carbon to give solid silicon and carbon monoxide gas.

If an experiment produces 5g but should have made 500 g what is the percent yield

Satellites orbit Earth in the.

In a basic solution A. concentration of OH - > concentration of H+. B. concentration of OH - < concentration of H+. C. concentration of OH - = concentration of H+. D. concentration of H + > concentration of OH-.

You have two balloons of equal volume at room temperature and 1 atm pressure. One balloon is filled with He and the other is filled with H2. Which statement is true about the relative number of gas particles in the two balloons?1.