Which element is a metal that is in the liquid phase at STP?

(1) bromine (3) hydrogen

(2) cobalt (4) mercury

A sample of a gas has a volume if 852mL at 288K. What temperature did s necessary for the gas to have a volume of 945mL?

How do atoms usually combine? In a way that makes each atom less stable. In a way that makes each atom more stable. In a way that increases the number of valence electrons. In a way that decreases the number of valence electrons.

Aluminum is an element. Which best describes what makes up a sample of aluminum? A. one kind of atom B. two different kinds of atoms C. all carbon-based atoms D. a carbon atom and non-carbon atoms

Sound travels most quickly through? a gas, liquid. Solid

Consider just the first sentence of this multistep word problem. Sentence 1: The sum of the ages of a brother and sister is 26. Give an equation that represents this statement using b as the age of the brother and s as the age of the sister.

An acid (X) reacts with a base (Y) to produce Mg3 (PO4) 2. What are X and Y? X = H3PO3; Y = Mg (OH) 2 X = H3PO4; Y = Mg (OH) 2 X = H3PO4; Y = Ca (OH) 2 X = H3PO3; Y = Ca (OH) 2

What are the pros of using steel?

The atomic mass of chlorine is listed as 35.454 amu on the periodic table. It has two naturally occurring isotopes, Cl-35 and Cl-37. What are the approximate percentages of each?

What is the breaking down of rock into sediment called

Enter the molecular formula for butane, C4H10. express in a chemical formula