The balance of nature depends on the food chain. true or False

Nitrous acid, HNO 2, is classified as a weak acid in water. This means that it produces A. 100% of the maximum number of possible hydronium ions. B. no hydronium ions. C. a relatively small fraction of the maximum number of possible hydronium ions.

Based on charles's law, which of the following statements is true for an ideal has at a constant pressure and mole amount? A. The number of collisions is independent of volume B. The number of collisions decreases with increase in volume C.

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.

what mass of sodium fluoride (FW=42.0 g/mol) must be added to 3.50 x 10^2 mL of water to give a solution with pH = 8.40?

770. mL of 0.00639 M NaI (aq) is combined with 285. mL of 0.00146 M Pb (NO3) 2 (aq). Determine if a precipitate will form given that the Ksp of Pbl2 is 1.40x10-8.

How many moles of hydrogen would be required to produce 5.0 mol of water?

What is the biggest difference between an exothermic and endothermic process? A. The direction of energy flow. B. The amount of energy transferred. C. The type of energy being transferred. D. The speed with which energy is transferred.

The mass of 1 mol of chromium (atomic mass 51.996 amu) is

Which of the following elements will tend to form a cation? A. Oxygen B. Nitrogen C. Sulfur D. Lead E. All of the Above

Is pure orange juice a solution or a suspension