Other Chemistry Answers

A metal 'X' forms a salt 'XSO4'.The salt 'XSO4' forms a clear solution in water which reacts with sodium hydroxide solution to form blue precipitate 'Y'.Metal 'X' is used in making electric wires and alloys like brass.
a)What do you think metal 'X' could be?
b)Write the name,formula and colour of salt 'XSO4'
c)What is blue precipitate 'Y'?
d)Write a chemical equation of the reaction which takes place when salt 'XSO4' reacts with sodium hydroxide solution.Give the state symbols of all the reatants and product which occur in the above equation.

a solution of 7.8gms of C6H6 and 45gms of C6H5CH3. calculate mole fraction of C6H6 and C6H5CH3

A sample of nitrous oxide (N2O) has a volume of 12.5 L at standard temperature and pressure (STP).

How many molecules of nitrous oxide are in the sample?

How many grams of silver, Ag, can be produced from the reaction of 100.0 mL of 3.0 M AgNO3 with an excess of Al metal?

whats the highest filled subshell for sodium atom?

A piece of wood from an archeological site has a carbon-14/carbon-12 ratio that is
12.5% that of the carbon-14/carbon-12 ratio in living materials. How old is the wood
from the temple site? The half –life of C-14 is 5,730 years.

Phosphorus-32 is used in the treatment of leukemia. It has a half-life of 14 days. If a
sample received by a medical lab has a mass of 16.0 g, how many grams of the
sample is still active 8.0 weeks later. Assume 1 week = 7 days.

41.0 g of barium hydroxide, Ba(OH)2 is dissolved in water. The final volume of the
solution is 2.00 L. What is the molarity of the solution? The molar mass of Ba(OH)2 is
171.3 g/mol

6. A student in a lab adds 20.0 mL of 0.150M Al2(SO4)3 solution to 30.0 mL of 0.200M
BaCl2 solution, a precipitate forms.
a. Write a balanced equation for the double replacement reaction that occurs.
(hint: review Ch 7 on Precipitation reactions)
b. What is the formula of the insoluble salt (the precipitate) that forms?
c. Which reactant is the limiting reactant? (Show calculations to support your answer.)
d. How many grams of the precipitate are formed? Molar mass of BaSO4 is 233.4 g/mol
Molar mass of AlCl3 is 133.33 g/mol (hint: you are only calculating grams of 1 of these

Whenever We Combine Two Elements They Form A Complete New Substance But When We Combine Salt Or Sugar With Water , Instead Of Combining With Water , Salt Or Sugar Dissolve In Water - WHY ?