Other Chemistry Answers

the ksp of magnesium fluoride is 3.7x10^-8.When 400.0 ml of 0.600 M NaF is mixed with 600. ml of 0.217 M Mg(NO3)2, a precipitate forms.
(a) what mass of megangsim fluoride(M MASS=62.30g/mol) is produced ?
(b) what will be the equilibrium concentrations go Mg^2+ and F^- in the resulting solution?

Light with a wavelength of 400 nm strikes the surface of cesium in a photocell, and the maximum
kinetic energy of the electrons ejected is 1.54 x 10‐19J. Calculate the longest wavelength of light that
is capable of ejecting electrons from that metal. (1 nm = 10‐9 m)

The first aid given to a person that ingested poisonous chemical in the laboratory include all these EXCEPT ----------------.
cold water to drink
Cold milk to drink
inducing vomiting
seek emergency medical assistance

Aluminum + silver sulfide = ?
a) what element is reduced and what is its charge before and after?
b) what element is oxidized and what is its charge before and after?

1.Sally and Dave are both trying to chemically smother small fires. They forgot their decomposition reactions, but they both have sodium carbonate and sodium chlorate on hand. Sally dumps some sodium carbonate on her fire, and Dave dumps some sodium chlorate on his fire. One person succeeds in putting out his/ her fire, and the other person needs to go to the hospital to be treated for burns. Who succeeded and who got burnt? Explain your answer (with words and full sentences), and write any balanced chemical reactions that would help you justify your claims

Write the balanced molecular equation for each reaction and the net ionic equation?

a) Solutions of ammonium phosphate and lithium hydroxide are mixed
b) Solutions of aluminum and magnesium sulfide are mixed
c) A piece of aluminum is dropped into a solution of zinc nitrate

explain the production of various spectral lines in the emission spectrum of hydrogen as explained by bohr

10g of calcium carbonate reacted with phosphoric acid to produce calcium phosphate, water and carbon di oxide. write a balanced chemical equation

1 Why substance sublimes?
2. How to calculate the density of marsh gas?
3. Show hydrogen bonding in chloroform and acetone?
4. Why iodine is solid while bromine is liquid?
5. Why ethanol is soluble in water?

a piece of chromium metal with a mass of 24.26g is heated in boiling water to 98.3 degrees celsius and then dropped into a coffee-cup calorimeter containing 82.3g of water at 23.3 degrees celsius. when thermal equilibrium is reached, the final temperature is 25.6 degrees celsius. calculate specific heat capacity of chromium.