How many electrons are there in the third shell of sodium, na (atomic number 11) ?

A mixture containing nitrogen and hydrogen weighs 3.49 g and occupies a volume of 7.45 L at 305 K and 1.03 atm. Calculate the mass percent of these two gases. Assume ideal-gas behavior. slader

Mixture with metallic properties

Are most volcanoes formed on land

You will be adding a solution containing potassium carbonate to a solution containing hydrochloric acid. What risk is associated with this?

Identify the brønsted base in the forward reaction hpo2 - 4 (aq) + hno3 (aq) ⇀↽ no - 3 (aq) + h2po - 4 (aq). 1. h2po - 4 (aq) 2. hno3 3. hpo2 - 4 4. no - 3

Kool-Aid is made up of sugar (C6H12O6), food coloring, and water. It is an example of a (n) element heterogeneous mixture homogeneous mixture compound

A laboratory experiment requires 250 millimeters of water for boiling. It also requires 100 millimeters of water for a cooling process.

Which set of procedures and observations indicates a chemical change? A) Ethanol is added to an empty beaker and the ethanol eventually disappears. B) A solid is gently heated in a crucible and the solid slowly turns to liquid.

If 100 grams citric acid react with 100 g baking soda how many grams of carbon dioxide?

What state of matter undergoes changes in volume most easily? a. solidb. liquidc. gasd. frozen