Which of the following is NOT a chemical reaction?

a. ice melts from water

b. ammonia breaks up into nitrogen and hydrogen

c. hydrogen and oxygen combine to make water

What is the molar mass of CH2O2? (C = 12.01 g/mol, H=1.008 g/mol, O=16.00)

In your own words, describe two patterns on the periodic table. Write at least two sentences, and be as specific as you can.

Which of the following should be classified as a solution? muddy water a soft drink with no fizz foam soil

If you are given a 1.0 L (1000mL) of an unknown liquid which has the mass of 500 grams it is most likely which of the above substances? Show work to back up your answer. Distilled water density 1.0 g/cm^3 propane density 0.

The nucleus of an atom holds 4 neutrons and 4 protons, how many electrons does it have

A very simple assumption for the specific heat of a crystalline solid is that each vibrational mode of the solid acts independently and is fully excited and thus cv=3NAkB=24.9 kJ / (kmol⋅K). This is called the law of Dulong and Petit.

How many elements are found in the following chemical equation? K + Cl → KCl A. 1 B. 2 C. 3 D. 0

How many liters of 0.85 M HCl solution would react completely with 3.5 moles Ca (OH) 2?

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.897 J/g•°C x 22°C B. Q = 0.75 g x 0.

Carbon dating advisable for measuring materials ages for a few years, thousands of years, millions of years