Calculate the molarity of 0.50 mol MgCl2 in 750 ml of solution.

A) 0.38 M

B) 0.67 M

C) 0.75 M

D) 0.95 M

How does global warming affect people's lives

Diets high in trans and what other type of fatty acid contribute to chronic diseases, including heart disease and cancer?

The standard enthalpy of formation for N2 (g) is 0.0 kilojoules per mole. TRUE FALSE

Which of the following is not an example of a scientific model? a. a diagram of a cell b. a data table c. a three-dimensional representation of an atom d. a graph showing the change in temperature and volume over time for hydrogen gas

Which sentence describes two atoms that form an ionic bond? O A. Each atom has a large electronegativity. B. Each atom has a small electronegativity. O C. The difference in their electronegativities is less than 1.7. O D.

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

What was the result of the atomic theory?