What is a substance that by its presence increases the speed of a chemical reaction between other substances and yet is itself unchanged by the reaction?

a. accelerator

b. catalyst

c. inducement

d. reactor

Which of these are examples of physical changes? Check all that apply. burning wood freezing water cutting paper iron rusting mixing water and acetone

What is the mass in grams of 3.05*1025 gold atoms

Find the number of moles in 3.70 x 10^-1 g of boron. 1) What is the molar mass of boron to three significant figures? 2) What is the conversion factor you will use to convert grams of boron to moles of boron?

Why sulphur used for food preservation?

If you pick a rock up off the ground, What if the action force? A) the normal force B) your hand pulling up on the rock C) the rock pressing down on your hand D) friction between the rock and your hand

A chemist exploring potential fuels for use in outer space is considering using vaporized aluminum chloride as a fuel.

Dinitrogen monoxide has a structural formula of NNO and requires resonance structures in order to draw the Lewis structures of the molecule.

Mg + 2HCI >MgCI2 + H2 What is the answer of the chemical reaction?

Why is galvanized steel preferred for outdoor uses?

Which of the following factors renders a species more susceptible to disease and infertility?