A layer of peat beneath the glacial sediments of the last ice age had a carbon-14 content of 25 % of that found in living organisms. How long ago was this ice age?

Ca3 (PO4) 2 organic or inorganic

An isotope with 8 protons, 9 neutrons, and 8 electrons would have which symbol? A) 16F B) 16O C) 17F D) 17O

The space exploration program has hired you for Advice on how to keep astronauts healthy in the space shuttle. how can the program's doctors make sure the astronauts' bodies work well enough to exercise in space

Ammonium sulfate is used as a fertilizer to supply nitrogen to crops. Write the equation for the disassociation of this compound when it dissolves in water and include states in your answer.

2H2 + O2 → 2H2O What mass of water forms when 1.45 * 10-3 g O2 react completely? (Molar mass of O2 = 32.00 g/mol; molar mass of H2O = 18.02 g/mol) 1.63 * 10-3 g 8.16 * 10-4 g 1.29 * 10-3 g

What direction do electrons flow in an electrolytic cell? A. From cathode to anode B. From anode to cathode C. Through the salt bridge D. From electrode to electrolyte

What is the atomic nucleus made of? only neutrons electrons only protons nucleons

How many ml of 2.50 m hno3 are needed to prepare a 75.0 ml of 1.00 m hno3?

For the reaction CH3OH + O2 → HCO2H + H2O, what is the maximum amount of HCO2H which could be formed from 8.02 mol of CH3OH and 15.49 mol of O2?

How are large polymers formed?