How many molecules are there in 0.250 moles of oxygen?

An aqueous solution is 3.00% by mass dextrose (C6H12O6) in water. If the density of the solution is 1.0097 g/mL, calculate the molarity of dextrose in the solution.

Color tests are more specific that microcrystalline tests in identifying a particular drug. A. True B. False

A plastic bottle holds 2.0 L of CO2 at 1.0 atm of pressure. the pressure is decreased to. 50 atm, what is the new volume of the gas?

Kinetic molecular theory states particles of an ideal gas are in what type of motion

A balloon contains 0.76 mol n2, 0.18 mol o2, 0.031 mol he and 0.026 mol h2 at 749 mm hg. what is the partial pressure (in mm hg) of o2? give a numeric answer only, no units.

Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g) When combining zinc metal with hydrochloric acid, you notice that you run out of zinc and still have plenty of hydrochloric acid to continue the reaction. What is the term used to describe the zinc?

Engineers increase output in crop production by combining the strengths of two plants. This can be done by using one plant to pollinate a different plant so that their strengths are combined into a new plant. What is this technique called?

Using the first volume and temperature reading on the table as V1 and T1, solve for the unknown values in the table below. Remember to use the rules of significant figures when entering your numeric response. A: B: C: D: A 2-column table with 5 rows.

Which scientist performed the cathode ray experiment leading to the discovery of electrons

Why does the temperature remain constant during melting till all the ice has melted?