How many Zn atoms are in Zn (C102) ?

The statement which describes a physical property of the element oxygen is 1. oxygen is needed for the rusting of iron 2. oxygen supports the burning of paper 3. oxygen has a density of 1.43 grams per liter 4.

What is the change in electrons for sulfur in the following reaction? S + NO3 - - > SO2 + NO A. Lose 4 electrons B. Lose 2 electrons C. Gain 4 electrons D. Gain 2 electrons

Which group of drugs includes legal painkillers like OxyContin? A. Stimulants B. Hallucinogens C. Depressants D. Narcotics

Which is a false statement about the structure of an RNA molecule A) It is a single stranded B) it has a spiral shape C) It contains the nitrogen base uracil D) It contains the nitrogen base thymine

It is snowing where Jenna lives. It's been snowing all day, but now the snow has changed to sleet and then to freezing rain. What is happening to cause these changes?

6. Which of the following statements correctly describes what happens to the diaphragm during an inhalation, when the lungs inflate? O A. The diaphragm returns to its resting state. O B. The diaphragm contracts and flattens. O C.

A column is filled with four different liquids of different densities. A red liquid, a blue liquid, a green liquid, and a purple liquid are all added into the column. This chart shows the densities of the liquids.

Metals are used in many products because of the characteristic properties that most metals have. Which product requires the high luster of metals in order to work?

Sodium is a silvery-white metal that reacts with chlorine gas, which is a yellow-greenish gas that is toxic. The reaction gives off a lot of heat.

Which of the following chemical reactions is an oxidation-reduction reaction? Answer WO3 + 3H2 W + 3H2O KNO3 + LiCl LiNO3 + KCl CaSO4 + 2NaCl Na2SO4 + CaCl2 Mg (NO3) 2 + 2HBr MgBr2 + 2HNO3 According to the collision theory and model created to