The atomic number of sodium (Na) is 11. This is also the number of which of the following?

atomic mass

ionic charge

neutrons

protons

If 0.3720 g of sulfur dioxide dissolves in 2.000 L of water 772.0 torr at what pressure would you be able to dissolve 0.4960 g in the same amount of water

An atom of aluminum has 13 protons and 14 neutrons. what is the atomic mass

5. How much heat (in kJ) is given out when 85.0 g of lead cools from 200.0 °C to 10.0°C? (Cp of lead = 0.129 J/g °C)

When 4.0 mol H2O react with 4.0 mol Al in the reaction below, 2.7 mol of Al are used up in the reaction. How many moles of Al are left over unreacted? 2 Al + 3 H2O → Al2O3 + 3H2 (C?) 2.7 mol Al left over 2.0 mol Al left over 1.3 mol Al left over 0.

Is material that has a density of 0.2g/ml good for building a bridge or for making couch cushions

Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, nh4br, and aqueous lead (ii) acetate, pb (c2h3o2) 2.

A magnesium atom has 2 valence electrons in its third shell. Which is a TRUE statement about what happens when it forms an ion? A. It will be an anion. B. It will have more electrons than protons. C.

What scientific discoveries led to changes in Dalton's atomic theory?

What does berkelium react with

Classifying living things