Nitrogen (N) has an atomic number of 7 and an atomic mass of 14. Which of the following correctly shows the electron arrangement for nitrogen?

A. 2, 7

B. 2, 5

C. 2, 2, 3

D. 2, 8, 4

A 1.00 liter solution contains 0.42 moles nitrous acid and 0.32 moles sodium nitrite. If 0.16 moles of nitric acid are added to this system, indicate whether the following statements are true or false.

What force is necessary to accelerates a 1250kg car at a rate of 40 m/s

A compound is composed of only C, H, and O. The combustion of a. 519-g sample of the compound yields 1.24 g of CO_2 and. 255 g of H_2O. What is the empirical formula of the compound?

Jane performed the following trials in an experiment. Trial 1: Heat 80.0 grams of water at 15.0 °C to a final temperature of 65.0 °C. Trial 2: Heat 80.0 grams of water at 10.0 °C to a final temperature of 65.0 °C.

If a reaction system has come to equilibrium, the concentration of products can be increased a. only if it is not reversible. c. by applying Le Châtelier's principle. b. only if the temperature is low enough. d. under no circumstances.

This chart shows discrpitions of the atoms for four different substances. Which substance is a solid

What is habitat destruction?

Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall.

What is the function of the ribosome

How much energy, in joules, does 150.0 g of water with an initial temperature of 25 C need to absorb be raised to a final temperature of 75 C