If silicon has a charge of - 4, how many electrons does it have

During a chemical reaction, mass and energy are both: increased. decreased. consumed. conserved.

What is the molarity of 200 mL of solution in which 2.0 molesof sodium bromide is dissolved?

When do you use a graduated cylinder

Empirical formula of a compound composed of 32.1 g potassium (k) and 6.57 g oxygen (o) ?

A new non-electrolyte molecule is discovered. When 241 mg of the molecule is dissolved in 250.0 mL of water, it has an osmotic pressure of 0.072 atm at 25 oC. What is the molar mass of the molecule

How does an atom with too few neutrons relative to protons undergo radioactive decay? * by converting proton to a neutron by converting a neutron to a proton by emitting an alpha particle

What is the chemical formula for the compound formed between sodium and iodine?

8. Write a balanced chemical equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, and Cas.

Is calcium carbonate a compound element or mixture?

Why do covalent bonds not involve the transfer of electrons