What is the mass of 18.8 moles of helium atoms?

Assign the oxidation number for (NH4) 3PO4

What are the subatomic particles that are responsible for comprising the atom's atomic mass?

Give the formula %error = theoretical value - experimental value / theoretical value * 100 calculate the percent error for the experiment.

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

Why does a leak in a car tire (at constant temperature) decrease the pressure of the tire? A) It removes kinetic energy from the system. B) The number of molecules decreases. C) The temperature decreases. D) The volume decreases.

Which statement accurately describes the atoms of a specific element? explain your answer in complete sentences. A. A Neon, Ne, atom contains 10 electrons outside the nucleus and 11 neutrons inside the nucleus. OR B.

What is the volume of 2.00 moles of chlorine (cl2) gas at stp, to the nearest tenth of a liter?

A reaction of 12.640 g of copper oxide with 0.316 g hydrogen produces 2.844 g of water and Xg of copper. X=_9

If i burn steel wool inside a closed jar or bottle will the oxygen be completly gone

700 grams of glucose reacted fully with oxygen How many moles of gas will be created