For each unbalanced equation below, calculate how many grams of each product would be produced by complete reaction of 12.5g of the reactant indicated. Indicate clearly the mole ratio used for the conversion.

A. TiBr4(g)+H2(g)=Ti(s)+HBr(g), Reactant is H2
B. SiH4(g)+NH3(g)=Si3N4(s)+H2(g), Reactant is SiH4
C. NO(g)+H2(g)=N2(g)+2H2O(l), Reactant is H2
D. Cu2S(s)=Cu(s)+S(g), Reactant is Cu2S

To calculate the grams of each product produced by complete reaction, we need to follow these steps:

Step 1: Determine the balanced equation for each reaction.
Step 2: Find the moles of the reactant using its molar mass and the given mass.
Step 3: Use the balanced equation to find the mole ratios between reactant and product.
Step 4: Convert the moles of the reactant to moles of the product.
Step 5: Convert the moles of the product to grams.

Let's go through each equation one by one:

A. TiBr4(g) + H2(g) = Ti(s) + HBr(g), Reactant is H2
Step 1: The balanced equation is already provided.

Step 2: Calculate the moles of H2:
Given mass of H2 = 12.5g
Molar mass of H2 = 2g/mol
Moles of H2 = (Given mass of H2) / (Molar mass of H2)

Step 3: The balanced equation shows the mole ratio between H2 and HBr is 1:2.

Step 4: Since the mole ratio is 1:2, the moles of HBr produced will be twice the moles of H2.

Step 5: Convert the moles of HBr to grams:
Molar mass of HBr = 80g/mol
Grams of HBr = (Moles of HBr) * (Molar mass of HBr)

B. SiH4(g) + NH3(g) = Si3N4(s) + H2(g), Reactant is SiH4
Repeat the same steps as above for this equation.

C. NO(g) + H2(g) = N2(g) + 2H2O(l), Reactant is H2
Repeat the same steps as above for this equation.

D. Cu2S(s) = Cu(s) + S(g), Reactant is Cu2S
Repeat the same steps as above for this equation.

By following these steps for each equation, you can calculate the grams of each product produced by the complete reaction of 12.5g of the given reactant in each case.

These are stoichiometry problems.

1. Balance the equations.
2. Convert 12.5 g of the reactant indicated to mols. mols = grams/molar mass.
3. Using the coefficients in the balanced equation, convert mols of what you have to mols of what you want.
4. Convert mols of the product to grams.
Post your work if you get stuck. Explain fully what you don't understand.

B) = 3SiH4(g) + 4NH3(g)= SiN4(g) + 12N2

3: 1: 12= ratio
3= 3.125
1= 1.042
12= 12.5