A sample of hydrogen has an initial temperature of 50.°

c. when the temperature is lowered to - 5.0° c, the volume of hydrogen becomes 212 cm3. what was the initial volume of the hydrogen in dm3?

Which element in group 16 has the greatest metallic character?

A solution of NaCl (aq) is added slowly to a solution of lead nitrate, Pb (NO 3) 2 (aq), until no further precipitation occurs. The precipitate is collected by filtration, dried, and weighed. A total of 12.11 g CaCl2 (s) is obtained from 200.

The equation, 2 H2 (g) + O2 (g) arrow 2 H2O (l), represents an equation for a standard formation reaction. True False

Hydrogen and carbon atoms bonded with single bonds are called: a. Carboxylic acids c. Alkanes b. Stereo isomers d. Hydracarbons

What is the term for the force exerted on an object by another object? Cascollision force reaction force action force net force

How is this model useful?

What is the frequency of a wave? A. The amount of time that one full cycle takes B. The distance traveled by the wave during one full cycle C. The amount of cycles that occur in a given time D. The distance from the beginning to the end of a cycle

How many of the elements in the second row of the periodic table (li through ne) will have at least one unpaired electron in their electron configurations?

The Modern atomic model includes electrons orbiting the nucleus. WHich of the following parts of the Dalton's atomic model was disproved by the discovery of the electron?

Explain why bromine does not react with aqueous potassium chloride