Calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 amu) and 1.100% are C-13 atoms (13.003354 amu). Give your answer to the correct number of significant figures.

Reactant A can participate in both of these reactions: 1) A + B - -> C + D Grxn = - 15.6 kJ 2) A + E - -> F + G Grxn = - 20.5 kJ Reaction 1 has a much higher rate than Reaction 2 under the same reaction conditions.

An isotope undergoes radioactive decay. The new isotope that forms has an atomic number that is 2 less than the original isotope's.

What is the balanced chemical equation for the reaction between Hydrochloride acid and calcium carbonate when the products of the reaction are calcium chloride Carbon Dioxide and water

Which of the following examples is a molecule with a covalent bond? a. KCl b. CO c. RbBr d. BeO

When ethyl acetoacetate (ch3coch2co2ch2ch3) is treated with one equivalent of ch3mgbr, a gas is evolved from the reaction mixture, and after adding aqueous acid, ethyl acetoacetate is recovered in high yield.

Which question can be answered using the scientific method? A) Which dog food is best for healthy teeth? B) What color is the most attractive? C) What is my purpose in life? D) Which flower smells the best?

For the galvanic cell reaction, expressed below using shorthand notation, what half-reaction occurs at the cathode?

Explain how do you would count the sig figs in the following number, 0.00340670, and what is the answer?

Choose the best answer to each question. Which has the most kinetic energy? a bowling ball with a velocity of 1.5 m/s Or a golf ball with a velocity of 0.5 m/s

Acid indigestion is sometimes neutralized with an antacid such as magnesium hydroxide (Mg (OH) 2). What products will be released when the antacid is mixed with the hydrochloric acid in the stomach