Which of the following elements is radioactive and synthetic?

A.

cesium

B.

xenon

C.

barium

D.

neptunium

During which change is heat energy released? A. Melting B. Boiling C. Sublimation D. Condensation

What is the difference between single, double, and triple covalent bonds? How many shared electrons are in each?

Which of the following pairs are not miscible? Group of answer choices hexane, C6H14 and water benzene, C6H6 and hexane, C6H14 ethyl alcohol, CH3CH2OH and water methyl alcohol, CH3OH and water pentane, C5H12 and hexane, C6H14

How many electrons can copper lend?

lucose, a major energy-yielding nutrient, is present in bacterial cells at a concentration of approximately 0.200 mM. i) What is the concentration of glucose in the E. coli cell in mg/mL?

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