Which statement is true about a catalyst?

A) It decreases the rate of a reaction.

B) It remains unused during the reaction.

C) It reduces the collisions between reactants.

D) It changes the final products of the reaction.

Dustin saw the following moon phase in the sky. What moon phase will he most likely see in 14 days? A. a first-quarter moon B. a new moon C. a last quarter moon D. a full moon Reset Submit

Because amines are basic, they can often accept a proton. draw the protonated structure of n-propylamine

What is the number of valence electrons in each of the main groups on the periodic table?

2000 joules are required to heat 125 grams of an unknown substance from 10 c to 28 c. What is the specific heat of the substance?

Select the steps that are associated with energy entering the system. Check all that apply. View Available Hint (s) Check all that apply. 1. the separation of solvent molecules 2. the separation of solute molecules 3.

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?