A cube of gold-colored metal with a volume of 54 ml has a mass of 980 grams. the density of pure gold is 19.3g/ml. Is the metal pure gold? why?

Identify which best describes the energy used to pluck guitar strings to make sound. A) electrity b) electromagnetic c) heat d) mechanical

A campfire is made from sticks and logs why do the sticks ignite before

Which of the following substances are not homogeneous mixtures? A. Gold Ring B. Spaghetti Sauce C. Cane Sugar D. Window Glass E. River Water F. Bottled Water

In the reaction N2 + 3H2 ⇌ 2NH3, an experiment finds equilibrium concentrations of [N2] = 0.1 M, [H2] = 0.05 M, and [NH3] = 0.001 M. What is the equilibrium constant Kc for this reaction? a. 0.08 b. 0.20 c. 5.0 d. 12.5

3. A 0.500 g sample of nitrogen gas combines with 1.140 g of oxygen gas to form NO2. If the atomic mass of oxygen is 16.000, calculate the atomic mass of nitrogen from this data.

Which of the following is not a source of air pollution related to human activities

You see rainforests a is far as the eye can see It rains every day and the humidity is fiercel Where might you be? Polar climate Tropical climate Subtropical climate Temperate climate

2. A balloon is dunked into a tank of cold water. How will this affect the size of the balloon?

Which of the following correctly describes a compound?

If the [H+] of a solution is 1.0 x 10 to the power of - 2 mol/L the pH is: (pH = - log (H+] 1 12 -2 2 chemistry