How many grams of HF will react with 9.99 g of Na2SiO3? * 16.57 g
13.10 g
24.33 g
30.00 g
(reaction in photo) ​

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.