What is the molarity of a copper (II) nitrate solution prepared by diluting 25 mL of a 1.0 M copper nitrate solution to 75 mL with water?

A. 0.33 M

B. 0.23 M

C. 2.50 M

D. 75.0 M

What number of moles of O2 will be produced by the decomposition of 4.4 moles of water?

It is possible for humans to come into contact with radioactive decaying elements? A. No B. Yes

Select the sketches that show aqueous solutions of a strong and weak acid.

Consider the reaction of zn metal with hydrochloric acid: zn (s) + 2hcl (aq) → zncl2 (aq) + h2 (g) if 7.50 g of zn is reacted with 0.225 moles of hcl in a 2.00 l container what pressure does the generated h2 exert against the container walls at 25.

How is this an improvement on the traditional, paper coffee filters? A: they are less wasteful and more cost effective because they last longer B: a permanent filter is more expensive than a traditional filter C: they contain plastic which does not

A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L. If the temperature changes to 70 ∘C, and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

Which is a waste product of aerobic respiration? A. water B. energy C. oxygen D. glucose

Match the following: Part A 1. matter with no definite shape or volume 2. matter with no definite shape but with definite volume 3. the process of a solid changing directly to a gas without forming a liquid 4.

What is the mass in grams of 390 mL

Around 1910, Rutherford bombarded gold foil with alpha particles. Most of the alpha particles passed straight through. To his surprise, a smaller number were deflected by 180°. This summary recounts the scientific discovery of A.