A student analyze two diagrams of a nitrogen atom. both diagram shows seven protons in the nucleus, but the number of neutrons differered. what are two nitrogen atoms?

(A) electrons

(B) isotopes

(C) covalent bonds

(D) ionic bonds

A 1.00x10^2-g aluminum block at 100.0 degrees celsius is placed in 1.00x10^2g of water at 10.0 degrees celsius. the final temperature of the mixture is 26.0 degrees celsius. what is the specific heat of the aluminum

In terms of pH what would happen if you mixed vinegar with a solution of ammonia. What type of product will form?

Which of the following is false? Charged molecules are insoluble in water. Hydrophobic molecules tend to be nonpolar and hydrophilic molecules tend to be polar. Gasoline has partial positive and negative charges which allows it to dissolve in water.

A __ has a definite shape and a definite volume. A. Solid B. Liquid C. Gas D. Molecule

When we add 2.0 g of a solute to a solution, the mass of the solution always increases by 2.0 g. If we add 2.0 mL or 2.0 cm3 the volume does not increase by the same amount. Why not? Briefly explain.

Sodium's atomic number is 11. What does this tell you about an atom of sodium?

Convert from °F to °C 36.8 °F → °C

2. How many grams of sucrose would be needed to prepare 100. mL of a solution of 0.10 M sucrose? Show your calculations.

You have two separate containers each filled with a gas. The containers have the same volume and are at the same temperature. The gases also exert the same pressure. Which of the following statements are true? a.

Here is an important message is chemistry code. scandium, iodine, europium, nitrogen, cerium, iodine, sulfur, gallium, ruthenium, oxygen, oxygen, vanadium, yttrium. What is the message