What is the difference between elements, compounds and mixtures in terms of particle theory?

What volume of a 0.20-M K2SO4 solution contains 57 g of K2SO4?

In order to study hydrogen halide decomposition, a researcher fills an evacuated 1.11 L flask with 0.822 mol of HI gas and allows the reaction to proceed at 428°C: 2HI (g) ⇋ H2 (g) + I2 (g) At equilibrium, the concentration of HI = 0.055 M.

If you have 3.45 * 1015 atoms of iron, how many moles of iron do you have?

A flask contains 0.450 mol of liquid bromine, br2. determine the number of bromine molecules present in the flask.

Calculate the density of a liquid if 58.9 ml of it has a mass of 46.08 g. answer in units of g/ml.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?

Which one of the following Acids is most likely to hurt you? Acid A: 1.0 M; Acid B: 0.0001M

Which statement accurately describes the atoms of a specific element? explain your answer in complete sentences. A. A Neon, Ne, atom contains 10 electrons outside the nucleus and 11 neutrons inside the nucleus. OR B.

What is the volume of 2.00 moles of chlorine (cl2) gas at stp, to the nearest tenth of a liter?

A reaction of 12.640 g of copper oxide with 0.316 g hydrogen produces 2.844 g of water and Xg of copper. X=_9