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Chemistry; homework help?

Chemistry; homework help? Topic: Homework help with chemistry
June 19, 2019 / By Donelle
Question: I have a packet for chemistry homework and I only have a couple more questions I'm having trouble with. I can't find it in my book and our teacher told the class we could use the internet, but I can't find anything on here either. 1. Where is the mass of the Uranium atom located? (The internet gives me the mass but not where it's located) 2. What are a substances chemical properties? (This question sounds like it doesn't make sense but I think she's trying to ask the chemical properties of a substance) Thank you to whoever may answer these... much appreciated! [:
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Best Answers: Chemistry; homework help?

Caryn Caryn | 6 days ago
Where is the mass?Lol,in all atoms of all elements,99,98% of the total atom mass is located in the atomic nucleus(protons and neutrons).The rest of the atom mass(0,02%)is located in the electron shell(electrons).This is because electrons are 1/1836 of the mass of a proton. As for ur 2nd question,here is all what u need:http://en.wikipedia.org/wiki/Chemical_property I hope i helped u!
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Caryn Originally Answered: I need help with Chemistry homework?
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O a) (0.0452 mol H2O) x (7 mol O2 / 6 mol H2O) = 0.0527 mol O2 b) (3.25 mol O2) x (2 mol C2H6 / 7 mol O2) x (30.06924 g C2H6/mol) = 27.9 g C2H6 c) (12.5 g C2H6) / (30.06924 g C2H6/mol) x (4 mol CO2 / 2 mol C2H4) x (22.414 L/mol) = 18.6 L CO2 at STP d) Supposing the O2 to be at STP: (1.48 L O2) / (22.414 L/mol) x (2 mol C2H6 / 7 mol O2) x (6.023 x 10^23 molecules/mol) = 1.14 x 10^22 molecules C2H6
Caryn Originally Answered: I need help with Chemistry homework?
first balance the equation: 2C2H6 + 7 O2 -----> 4CO2 + 6H2O a. (.0452 moles H2O)(7 moles O2/6 moles H2O) = .05273 moles O2 b. first figure out how many grams are in one mole of C2H6. you do this by looking at the molar mass on the periodic table C=12.01 H=1.01 (12.01)2+ 6(1.01)=30.08 g (3.25 moles O2)(2 moles ethane/7 moles O2)(30.08 g C2H6/1 mole C2H6)=13.9657 g C2H6 c. (12.5 g C2H6)(1 mole C2H6/30.08 g C2H6)(4 moles CO2/2 moles C2H6)(22.4 L/1 mole CO2)=22.888 L CO2 d. (1.48L O2)(1 mole O2/22.4L)(2 moles C2H6/7 moles O2)(6.02 x 10^23 molecules C2H6/1 mole C2H6)= 1.14 x 10^22

Anima Anima
So chopping via all of the bullshit, you desire us to support you false lesson plans that you simply have been not ever assigned and chemistry homework that you simply not ever did so your trainer can deliver you a grade that you simply not ever earned? What's your backup plan whilst your chemistry trainer makes an attempt to verify this with the instructor on the exceptional institution? Or will have to we watch for that query for subsequent week? I do not consider I'd be doing you any favors if I "helped" you, however I understand it'll take you decades to discover that. Suck it up and play the playing cards you are dealt.
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Anima Originally Answered: I have chemistry homework, how do i?
You should find a reference key and do the math. I'll help you with the middle one to illustrate. First - Set up the logical thinking to help yourself out. So - 1 Liter = 1000 milliliters ('milli' means 'thousandth') Thus for every Liter there are 1000 milliliters... So 1 L =1000 mL Now - You have 60 Liters So.... 60 x 1000 = 60,000 There are 60,000 (sixty thousand) milliliters in 60 L. Have fun and keep studying science!!!!!
Anima Originally Answered: I have chemistry homework, how do i?
To convert kilo to mega, divide by 1000. To convert liters to milliliters, multiply by 1000. To convert centimeters to microns, multiply by 10,000.

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