what mass of hg will occupy a volume of 50.0 mL

1. What are the horizontal (from left to right) parts of the periodic table called? rows periods families

The volume of a given quantity of a gas must increase if:

8. How many atoms of cobalt are in a 0.39 mole sample of CoC

What is the specific name of the covalent compound consisting of nine carbon atoms and 20 hydrogen atoms? A. Nonane B. Nonacarbon decahydroxide C. Nonahydrogen decacarbon D. Hydrocarbon

Which piece of evidence would prove that a reaction is exothermic

What is a neutral atoms oxidation number

Suppose 30 grams of NaCl are placed in 900 mL of water. What is the molarity of this solution?

After a particularly cold day outside you go home to make some tea. you heat the water in the mug so that botch are about 75 degrees celcious. the tea bag is only 30 degrees celcious and the room is around 26 degrees celcious.

For main-group elements using the older numbering system the group number on the periodic table corresponds to which characteristic of the elements of that group

In the vertical columns of the periodic table, as the atomic numbers increase: a. the number of electron shells increases. b. the ionization energies increase. c. the number of electrons in the valence shell increases. d.