B6. How old is an object with a molar ratio of 15% bismuth-210 to 85% Thallium-206? A. 5 days B. 10 days C. 15 days D. 20 days

Which values are written in proper scientific notation? Check all that apply. -350 -350.00 -3.50 * 104 0.000350 3.50 * 104 3.50 * 10-4 35.0 * 10-5 3,500

5. The partition coefficient of Compound A is 7.5 in dichloromethane (a. k. a. methylene chloride) with respect to water. a.

Upon the addition of hcl to zinc, explain why a lit bunsen burner should not be in the fume hood

The Kw of water varies with temperature. Calculate the pH of water at 46⁰C with a Kw = 1.219 x 10-14. Show all calculations leading to an answer.

A tank holding 7.80 L of gas is at a pressure of 9.80 atm. If the temperature and number of gas particles do not change, what is the new pressure at a volume of 5.3 L? *Show Work* A. 14.4 atm B. 51.9 atm C. 4.22 atm D. 0.0693 atm

Difference between radical and compound

Water is a produced when 30.0 grams of hydrogen reacts with 80.0 grams of oxygen what is the limiting reagent

How are reactions and products related in a chemical reaction?

Ollie wants to sign up with an online social network called TeensMeet, which other kids at school have joined.

7. A perfect cube has a width of 2 cm. What is the cube's volume? Show your work!