Homework can someone please help me with Chemical equation

1.What mass of silicon carbide (SiC) forms when 17.8 grams of carbon reacts completely with SiO2 according to the following equation (the molar mass of carbon is 12.01 g/mol and the molar mass of SiC is 40.10 g/mol)?

2.If 0.250 moles of bromine and 0.900 moles of ammonia react according to the equation below, what is the maximum amount of ammonium bromide (in moles) produced?

3.A 25.00 mL sample of sulfuric acid, H2SO4, requires 42.13 mL of 0.1533 M NaOH for titration to the equivalence point. The equation of reaction is provided below. What is the concentration of the sulfuric acid?

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1. you take the 17.8 grams

1. you take the 17.8 grams of carbon and divide by 12.01 grams of carbon(atomic mass). then times by 40.10 grams of SiC(atomic mass). which equals 59.481666666 grams of SiC.

2. ? where is the equation??

2. ? where is the equation??

and i have no clue on number

and i have no clue on number 3.

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