Help MeGodHelpMe

Can someone please help me I’m being timed and need help with 2 questions 1. Calculate the mass of oxygen in 418g of Co2 2. Calculate the number of atoms in 7.38 moles of carbon atoms

I have to write a X and Y subscript. If I wanted to put Fe(iron II) charge +2 and N (niterogen) -3 how would that subscript look? Im not use if those would even be able to go together. But if not can you help me fine a +2 and -3 charge is be able to turn...

1. How many liters of carbon are produced at STP when 295g of methane gas (C3H8) is reacted with excess oxygen? The other products is water vapor. Write out a balanced equation. My answer: C3H8+O—-> CO3+OH8?

Oh ok thank you. I only have one more question then I will post all my answers so someone can check my work. 1. How many liters of carbon are produced at STP when 295g of methane gas (C3H8) is reacted with excess oxygen? The other products is water vapor....

Is that all that I have to do because I feel as if there’s more for some reason. But if there isn’t can you show me how I should make my balanced equation look?