Explain what it means by a balanced chemical equation

Copper has two isotopes, copper-63 and copper-65. The relative abun- dance of copper-63 is 69.1% and copper-65, 30.9%. Calculate the average atomic mass of copper.

Write the half-reactions for what must have happened at each electrode for each of the reactions in step 4. indicate what was oxidized and what was reduced.

Identify the acid-conjugate base pair in this balanced equation: H2SO4 + 2NaOH → 2H2O + Na2SO4

Which statement about the noble gases is most reliable?

Describe the four types of fronts and the weather associated with each.

What gene is responsible for tumor suppression? A. beta - galactoside B. p53 C. alpha goblin D. beta goblin

How does ur body maintain constant tempature on a hot day?

1. What is the probability of rolling a five on one die three times in a row? 2. The allele for a cleft chin, C, is dominate among humans. Using a punnet square, what are the results of a cross between parents with genotypes Cc and cc

A chemical is placed in a beaker containing 20 g of soil and 500 mL of water. At equilibrium, the chemical is found in the soil ast a concentration of 100 mg. kg-1 of soil.

A solid reactant is placed into a beaker of warm water. The liquid vigorously bubbles as the soild dissolves into the solution. What will most likely happen if the temperature of the liquid is slightly reduced