14C has a half-life of 5600 years. An analysis of charcoal from a wood fire shows that

its 14C content is 25% of that in living wood.

How many years have passed since the wood for the fire was cut?

How is gibbs free energy related to a spontaneous reaction

An isotope of cesium has 55 protons and 78 neutrons. What is the mass number of this isotope?

Which of the following are weak electrolytes in aqueous solutions? Select ALL that apply. Group of answer choices HgCl2 LiOH HClO4 NH3 HI

What is the formal charge on the xenon atom (xe) in xef2?

A toothpick pencil and log are all the same type of wood explain which would be most dense

The molar mass of water (H2O) is 18.02 g/mol. Yun needs 0.025 mol H2O for a laboratory experiment. She calculates that she needs 72.0 g H2O for the experiment. Yun's calculation was incorrect because she set up her unit conversion incorrectly.

I'm doing isotope homework and I need the find the number of protons, neutrons, and electrons first one is chromium-58 and chromium-63

Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid.

what mass of magnesium is required to react with excess nitrogen to produce 0.500 mol magnesium nitrade

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate