A 100g sample of

Carbon-14 has a half-life

of 5 years. How much

Carbon-14 is left after 10

years?

When water boils, bubbles form at the base of the container what gas has formed

10cm3 of an unknown hydrocarbon was sparked with 100cm3 of oxygen (an excess). When the resulting gases were cooled back to the original temperature, they had a volume of 75cm3.

Which of the following Ka values represents the weakest acid A: Ka=1.82x10^-1 B: Ka=3.24x10^-7 C: Ka=1.29x10^-4 D: Ka=1.62x10^-12

A fusion example is the combining of hydrogen isotopes. a. True b. False

Identify three types of coral reefs

Coffee is decaffeinated industrially using supercritical (sc) CO2. One advantage to using scCO2 is that the polarity of the supercritical fluid can be tuned by varying temperature, pressure and cosolvent additives.

The relationship between pressure and temperature of a gas, when volume and moles of a gas are held constant, is: P*T = k. TRUE FALSE

The system is said to be in dynamic equilibrium when: Select one: a. there is no longer any net change in the concentrations of products or reactants. b. the forward and reverse reactions come to a halt. c. None of these d.

You have a 1 L container of a gas at 20 C and 1 atm. Without opening the container, how could you tell whether the gas is chlorine or fluorine? a. measure the mass of the gas b. measure the speed of the gas molecules c.

A 1.268 g sample of a metal carbonate, MCO3, was treated 100.00 mL of 0.1083 M H2SO4, yielding CO2 gas and an aqueous solution of the metal sulfate. The solution was boiled to remove all of the dissolved CO2 and then was titrated with 0.1241 M NaOH.