What type of reaction takes two elements or molecules and combines them together to produce a single molecule? A. a synthesis reaction B. a hydrolysis reaction C. an electrolytic reaction D. a decomposition reaction

The density of water is 62.4 lb/ft3. If a swimming pool holds 10,000 gallons of water, the weight of water in the pool is lbs. (231 in3 per gallon; 1728 in3 per ft3) (Only place the numerical value in blank) (Round to the nearest whole number)

When an atom gives off energy in the form of light, a. it becomes excited. b. it becomes more stable. c. it returns to ground state. d. both b & c e. none of the above.

What is the oxidation number of cl in naclo3

Is 70 degree hot or cold

In any chemical compound the elements are always combined in the same proportion by__. a) charge b) mass c) volume d) density

The organisms living together in a community are interdependent upon one another. Look at the food web below. In which of the following ways is a puffin dependent upon salmon? A. Puffins have a commensalistic relationship with salmon. B.

2) Which of the following is a true statement? A: All the atoms of an element must be identical. B: Compounds may be separated by physical means. C: Mixtures may not be separated. D: Homogeneous is one type of compound.

How to tell the difference between ionic and covalent bonding?

The combustion of propane may be described by the chemical equation C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) How many grams of O2 (g) O2 (g) are needed to completely burn 83.3 g C3H8 (g) ?

Was the relationship among temperature, heat, and thermal energy?