Inorganic Chemistry Answers

45g of salt are dissolved in 0.10l of solution.what is the concentration in g/l?

Magnesium combines with oxygen to form magnesium oxide. If 21.56 g of magnesium reacts completely with 5.41 g of oxygen, what is the percent by mass of oxygen in magnesium oxide?

. A student is given four solid samples labeled W, X, Y and Z. She is told that the solids
could be gold, lead (II) sulfide, silicon dioxide (quartz) and iodine. The results of her
investigation are: a) W is a good electrical conductor while X, Y and Z are not b) When the
solids are hit with a hammer, W flattens out, X shatters, Y is smashed into a powder and Z is
not affected c) When the solids are heated with a Bunsen burner, Y sublimes but X, W and Z
do not melt d) In treatment with 6M HNO3, X dissolves but there is no affect on W, Y or Z.
On the basis of these test results, identify the solids. (Show your reasoning)

What is more difficult to digest oil or sucrose

In the complete reaction of 18.17 g of sodium with 36.90 g of chlorine, what mass of sodium chloride is formed?

does methane undergoes nitrogenation?if yes or no then why?

If a penny is 19.5 mm in diameter, how many pennies are needed to stretch from the earth to the sun? It takes 8.00 minutes and 30.0 seconds for light to travel from the sun to the earth at a speed of 186,282 miles per second.

How can we show that an element is conductive, insulating or semiconducting?
Some of them use "The Band theory" , what is it about?

Thank you.

What dictates the amount of electrons lost of gained when an atom becomes an ion?

How do you know how many electrons to place in each electron shell/ energy level in different element atoms?