How many half-lives have passed when there are 3 times as much daughter isotope as parent isotope?

At a given temperature the vapor pressure of pure liquid diethyl ether and isopropyl alcohol are 730 torr and 310 torr, respectively. a solution prepared by mixing isopropyl alcohol and diethyl ether obeys raoult's law.

The chemical equation below shows the combustion of methane (CH4). CH4+2O2--CO2+2H2O The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of carbon dioxide (CO2) is 44.01 g/mol. What mass of CO2, in grams, will firm when 8.

How long does it take for 750ml of water boil

True or False, Nuclear fusion occurs when two nuclei are combined, while nuclear fission occurs when a nucleus splits into smaller nuclei; in both reactions, a lot of energy is released.

Why do minor parties have difficulty succeeding in the United States electoral system? A. tend to focus on only a single issue B. quickly join forces with the wrong party C. views are usually tied to strict religious doctrine D.

A student has a solution with a pH of 7. The student adds HF, hydrogen floride, to the solution, hoping to increases the pH of the solution. What is wrong with this student's approach? Select one: A. You cannot change the pH of a solution. B.

What is more likely to happen if wetlands are drained?

A) If you weigh a hydrated compound before and after heating it. Do you expect the mass to be more or less than before heating? Explain why. b) How about if you weigh a bag of popcorn before and after heating it.

Define the term relative molecular mass

It took many of the metals several minutes to begin to react. Once the reaction was initiated, several of these metals continued to react quite vigorously.