What is a chemical bond?

a. the attraction of two atoms that holds the atoms together

b. a representation of chemical properties

c. the force that holds together the elements in a compound

d. a substance that's composed of atoms?

A mixture containing particles that settle our if left undisturbed is a

A chemistry student must separate should barium sulfate from the aqueous solution. Equipment and glassware normally found in the chemistry classroom are available to the student.

If a substance decreases in temperature from 270K to 220K, the kinetic energy of that substance increases.

Formation of a lipid bilayer is energetically favorable. how does this arrangement result in higher entropy for the system, and thus make bilayer formation energetically favorable? select one: a. fatty acid tails are highly saturated and flexible. b.

What type of bond does sodium and bromine form?

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