If an object has a volume of 5 mL and a mass of 50 g, what is the density of the object?

0.10

10

40

250

Which is a characteristic of mixtures? A. They are chemically bonded together. B. They can be classified as pure substances. C. They have fixed ratios between their components. D. They can be separated by physical processes.

What branch of chemistry addresses chemical reactions that involve an electric current?

A 255-mL flask contains pure helium at a pressure of 746 torr. A second flask with a volume of 475 mL contains pure argon at a pressure of 726 torr.

What clues indicate a rusty bike has gone through a chemical change

Which sample of nitrogen gas at STP occupies the largest volume? (A) 14 liters (B) 14 moles (C) 14 grams (D) 1.4 * 10^{24} molecules (E) 4.2 * 10^{24} molecules

Green plants take in water (H2O) and carbon dioxide (CO2) and produce glucose (C6H12O6) and oxygen gas (O2). Calculate the molar masses of carbon dioxide, glucose, and oxygen gas.

Are 3 eggs the same quantity as 3 dozen eggs?

What is an empirical formula? O A. The chemical formula that reveals how the molecule actually exists in nature O B. The chemical formula that is written in terms of percent composition O C.

What part of an original isotope's number of atoms remains after two half lives?

What gas has formed when bubels form when water is boiled?