The gears on a bicycle are an example of what type of simple machine?

Lever

Wheel and Axle

Inclined plane

Pulley

How many electrons do two atoms in a double covalent bond share?

What is concentration

Most of the periodic table is made of what type of element? Metals Nonmetals Metalloids

Which of these is a generic name for a subatomic particle in the nucleus of an atom? A. nuclide B. nucleon C. isotope D. quark

What are the basic building blocks of matter? A elements B compounds C mixtures D solutions

A reaction starts with 20.0 grams of lithium hydroxide (LiOH) and produces 31.0 grams of lithium chloride (LiCl), what is the percent yield of lithium chloride (LiCl) ? * LiOH + KCl - LiCl + KOH A) 64.5% B) 88.6% C) 81.5% D) 92.8%

You aren't sure if your pH meter needs to be calibrated, so you put it in a buffer solution that has a known pH of 7. You take four separate readings of the solution with the pH meter. The meter reports the pH as 5.5, 8.6, 6.3, and 9.4.

Can you explain and read this equation 2Mg + 02 - - 2MgO

The label of a gas cylinder has come off in your laboratory. You know that only one species of gas is contained in the cylinder, but you do not know whether it is hydrogen, oxygen, or nitrogen.

Give two example of compound that decompose to give off oxgyen gas