Multiply the following numbers and write the answer in scientific notation: (3.45 * 107) * (6.25 * 105).

How is a chemical reaction different from a physical reaction

How many atoms of hydrogen are present in 2.92 g of water?

Many substances are soluble in water. Which property of water makes this possible? A. water can dissolve a wide variety of substances B. water has the ability to cleanse itself through the water cycle C.

Suppose an nitrogen atom gains two electrons to become an nitrogen ion. what is its electrical charge?

On the present Periodic table of the elements, the elements are arranged according to increasing what?

What is the lowest energy level that contains d orbitals? O A. 4 O B. 1 O c. 3 O D. 2

What is the nature of the Ca-Cl bond in a molecule of calcium chloride (CaCl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.167 O A nonpolar covalent B. moderately polar covalent C.

Which statement is true about oxidation and reduction in an electrochemical cell? (1) Both occur at the anode. (2) Both occur at the cathode. (3) Oxidation occurs at the anode and reduction occurs at the cathode.

For a solar eclipse to occur,

How many times does the citric acid cycle occur for each molecule of glucose?