Determine the number of neutrons in an atom of Si-29

Scientists often deal with numbers that are either very large or very small. For example, the radius of the Sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 * 10-4 millimeters.

Calculate the molarity of the solutions described below. A. 10.0 g of sodium chloride is dissolved in 2.0 L of solution. B. 52.5 g of sugar (C12H22O11) s dissolved in 1.0 L of solution. C. 120 g of aluminum sulfate is dissolved in 10.0 L of solution.

Does Silicon form a cation or is it anion?

What type of energy is converted when fireworks relese heat, light, and sound

Hydrazine (N2H4) is a fuel used by some spacecraft. It is normally oxidized by N2O4 according to the following equation: N2H4 (l) + N2O4 (g) - >2N2O (g) + 2H2O (g) Calculate delta Hrxn for this reaction using standard enthalpies of formation.

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?