A rock weighing 50 g is broken into 2 pieces. what age the possible weights for the two pieces of rock?

Explain how manipulation of light waves can cause reflection, refraction, diffusion, and absorption; and describe how different media (solid, liquid, or gas) affect wave behavior.

A slice of Swiss cheese contains 47 mg of sodium. (a) What is this mass in grams?.047 (b) What is this mass in ounces? (16 oz = 453.6 g) 0.0016 X (c) What is this mass in pounds? (1 lb 453.6 g) 0.0001x

Which choice contains a FALSE statment? A. For the vaporization of liquid benzene ΔH is positive. B. For the formation of 1 mol nitrogen dioxide from its elements (heat is absorbed) ΔH is negative. C.

Three types of stress that occurs in earths crust

Chopping wood is an example of a physical change. Burning wood logs in a fire is a chemical change. What distinguishes the chemical change from the physical change? A. The chemical change takes away weight. B.

Sound waves travel fastest through? A.) Air B.) Steel C.) Water D.) Vacuum

Which of the following combinations will result in a reaction that is never spontaneous? 1) positive enthalpy change and positive entropy change 2) positive enthalpy change and negative entropy change 3) negative enthalpy change and positive entropy

Which of the formed elements is present in the greatest concentration?

A compound has a percent composition of 24.74% potassium (molar mass = 39.10 g/mol), 34.76% manganese (molar mass = 54.94 g/mol), and 40.50% oxygen (molar mass = 16.00 g/mol).

What would be the saturation concentration (mole/L) of oxygen (O2) in a river in winter when the air temperature is 0°C if the Henry's law constant at this temperature is 2.28 * 10-3 mole/L-atm? What would the answer be in units of mg/L?