Homework Help for Chemistry

Determine the molarity for each of the following solutions:

1. 10.5 kg of Na2SO4·10H2O in 18.60 L of solution

Determine the molarity for each of the following solutions:

1. 0.2074 g of calcium hydroxide, Ca(OH)2, in 40.00 mL of solution

Determine the molarity for each of the following solutions:

1. 98.0 g of phosphoric acid, H3PO4, in 1.00 L of solution

Determine the molarity for each of the following solutions:

1. 0.444 mol of CoCl2 in 0.654 L of solution

What does it mean when we say that a 200-mL sample and a 400-mL sample of a solution of salt have the same molarity? In what ways are the two samples identical? In what ways are these two samples different?

Explain what changes and what stays the same when 1.00 L of a solution of NaCl is diluted to 1.80 L.

I need find the pH and pOH please help me

	Concentrations	pH	pOH
1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19

20

 

 

 

 

 

 

Construct a 2-3 paragraph essay to compare and contrast metals and non-metals. Discuss chemical and physical properties, examples, valence electrons, location on the periodic table, etc. in your own words. Please cite any sources you quote directly from.

 The fifth state of matter, the BEC (Bose-Einstein condensate) was first created in what year?

What is made of gas atoms that have been cooled to near absolute zero at which temperature the atoms slow down, combine and forms a single entity known called a superatom?

 Who coined the term “plasma” in 1928?

Who first identified plasma in 1879?

Aside from liquid, gas and solid, there are two other states of matter.

 The process of gaining or losing an electron results to the formation of a charged atom or molecule called

What refers to the measure of the atom’s tendency to attract an additional electron?