9. Thallium-208 has a half-life of 3.053 min. How long will it take for 120 g of it to decay to 7.5 g?

Why should the scientific method be used to answer a question? a. it provides a way to test an idea without any bias. b. it provides a way to test a hypothesis. c. it provides a way to ensure all hypotheses are proven correct. d. it provides a way to quickly turn a hypothesis into a scientific theory.

150.0 grams of asf3 were reacted with 180.0 g of ccl4 to produce ascl3 and ccl2f2. if the actual yield of ccl2f2 was 127 g, what is the percent yield?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?