Name an element in the fourth period (row) of the periodic table with three 3d electrons.

The amount of gas in a rigid container is tripled. What happens to the gas pressure?

In the forward reaction of this equilibrium, which substance acts as the brønsted-lowry base? h2s (aq) + ch3nh2 (aq) ⇋hs - (aq) + ch3nh+3 (aq) express your answer as a chemical formula.

6 (-4) + 15 6 (-4) + 15

67.029g to three significant figures

Which best describes the motion of iron atoms in solid iron?

What is the symbol for the second most common element in the universe? a. H b. C c. Fe d. He?

Which class of organic compound would neutralize a carboxylic acid? O aldehyde amine alkyl halide ether

Calculate the molarity of the solution. 29 g of NaCl (g. f. w. = 58.5 g/mol) in 0.030 liters. 0.015 M 17 M 67 M

How can scientists study the composition of distant stars?

When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions (Na+) and chloride ions (Cl-). In contrast, the atoms of covalently bonded molecules (e. g.