What is an isotope? Give an example (use the full name! Simply listing the element is not a correct answer!)

Muscle contraction is triggeredA) in response to an increase in the cytoplasmic Ca2+concentration. B) in response to a decrease in the cytoplasmic Ca2+concentration. C) in response to an increase in the cytoplasmic cAMP concentration.

Which of the following is not produced by nuclear decay? A) Alpha particles B) Beta particles C) Gamma rays D) Delta particles

Use the balanced chemical equation to work the following problem. 2C4H10 + 13O2 → 8CO2 + 10H2O How many grams of CO2 (molar mass = 44.01 g/mol) would be formed from the total reaction of 5.00 g of C4H10 (molar mass = 58.1 g/mol) ? 15.1 g 0.947 g 0.

Carbon dioxide and methane increases in the atmosphere are most associated by scientist with

Which of the following is accurate when discussing specific heat? A. Specific heat values for liquids will never vary for different ranges of temperature. B. The specific heat of a gas may be measured at constant pressure. C.

How much heat is released if 7.15 g cao (s) is added to 152 g of h2o (l) ? cao (s) + h2o (l) → ca (oh) 2 (s) δh°rxn = - 64.8 kj/mol?

Hydrogen sulfide gas and sulfur dioxide gas react to form solid sulfur and water. If 10.0g of gaseous hydrogen sulphide is mixed with 10.0g of gaseous sulfur dioxide, how many grams of solid sulfur can form?

Describe the contributions of the following scientists to our knowledge of atomic structure: J. J. Thomson, R. A. Millikan, Ernest Rutherford, and James Chadwick

If you have 400 grams of a substance that decays with a half-life of 14 days, then how much will you have after 56 days?

As an electron gains energy, it becomes excited and jumps to a lower energy level?