Combustion of 6.90g of this compound produced 13.8g of CO2 and 5.64g of H2O. What is the empirical formula of the unknown compound?

How will the addition of water affect the acidity of a highly acidic solution having pH 2?. A) There will be a slight decrease in the pH value. B) There will be a slight increase in the pH value. C) The pH value will remain constant.

Wich body system makes the energy in food usable for the body to carry out its activities

A driver realizes that she is traveling in the wrong direction on a one-way street. She has already driven 3.5 meters at a velocity of 16 meters per second, cast before deciding to make a U-turn.

If there is 0.2 M glucose along with 0.15 M NaCl in solution, what is the osmolarity of this solution? If there is 0.2 M glucose along with 0.15 M NaCl in solution, what is the osmolarity of this solution? 1. 500 mOsm 2. 2.15 Osm 3. 350 mOsm 4. 2.

A certain ore is 33.0% nickel by mass. How many kilograms of this ore would you need to dig up to have 25.0 g of nickel?

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.