A certain liquid sample has a volume of 14.7 mL and a mass of 22.8 grams. Calculate the density.

3.45 g/mL

2.25 g/mL

1.55 g/mL

4.15 g/mL

How do you know that an organism belongs to the animal kingdom

Helium has an atomic number of 2 and atomic mass of 4. explain.

How can You friend electrons, protons and neutrons in an element?

A cube of iron (cp = 0.450 j/g•°c) with a mass of 55.8 g is heated from 25.0°c to 49.0°c. how much heat is required for this process? rounded to three significant figures.

Using the periodic table, find the molecular mass of H2. H2 = g/mole

A substance that speeds up the rate of a chemical reaction is called a. a catalyst. b. a lipid. c. a molecule. d. an element.

How many moles of Mgs203 are in 245g of the compound

A student was trying to obtain lithium by electrolysis of aqueous lithium chloride. Was he successful?

A Gouy balance is used to determine the magnetic susceptibility of a substance. A strong electromagnet is placed next to the sample, which is on a balance.

Is the bonds that cause gaseous Cl2 to become liquid when cooled intramolecular or intermolecular