stoichiometry help

[siggy]

H₂SO₄ + 2 NaOH >> Na₂ SO₄ + 2 H₂O

b. what mass of H₂SO₄ would be required to react with .75 mole of NaOH?
c. what mass of each product is formed by this reaction?

Copper reacts with silver nitrate through single replacement.

a. if 2.25g of silver are produced from teh reaction, how many moles of copper (II) nitrate are produced?
b. How many moles of each reactant are required in this reaction?
c. what is this equation.

PLEASE HELP!! THANK YOU!

[Xen]

H₂SO₄ + 2 NaOH >> Na₂ SO₄ + 2 H₂O

b. what mass of H₂SO₄ would be required to react with .75 mole of NaOH?
c. what mass of each product is formed by this reaction?

b.
m(H₂SO₄) = M(H₂SO₄) * n(NaOH) / 2 = 98.0791 * 0.75 /2

c.
m(Na₂SO₄) = M(Na₂SO₄) * n(NaOH) / 2 = ...
m(Na₂SO₄) = M(H₂O) * n(NaOH)* (2 / 2) = ...
M is molar mass, you can calculate it here: http://www.webqc.org/mmcalc.php

Copper reacts with silver nitrate through single replacement.

a. if 2.25g of silver are produced from this reaction, how many moles of copper (II) nitrate are produced?
b. How many moles of each reactant are required in this reaction?
c. what is this equation.

c.
Cu + 2AgNO₃ = Cu(NO₃)₂ + 2Ag
a.
n(Ag) = m(Ag)/M(Ag) = ...
n(Cu(NO₃)₂) = n(Ag) / 2 = ...
b.
n(Cu) = n(Ag) / 2 = ...
n(AgNO₃) = n(Ag) = ...