Chemistry, 29.09.2021 20:30, Katiecool290
STEM 11
1.How many moles of carbon dioxide does 250 grams of the substance have? How many molecules of CO2 are there?
2. Determine the percent composition of each element in the compound in tartaric acid (C4H6O6)
3. What are the empirical and molecular formula of a compound that is 40.27% potassium, 26.78%
chromium, and 32.95% oxygen?
4. Balance the following equations
1. _ C + _ O2 β ___ CO
2. _ Mg + _ O2 β _ MgO
3. _ H2O2 β _ H2O + _ O2
4. _ CH4 + O2 β _ CO2 + _ H2O
5. _ N2O5 β _ N2O4 + _ O2
Answers: 2
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Consider the following unbalanced equation for the combustion of hexane: Ξ±c6h14(g)+Ξ²o2(g)βΞ³co2(g)+Ξ΄h2o(g) part a balance the equation. give your answer as an ordered set of numbers Ξ±, Ξ², Ξ³, use the least possible integers for the coefficients. Ξ± Ξ± , Ξ², Ξ³, Ξ΄ = nothing request answer part b determine how many moles of o2 are required to react completely with 5.6 moles c6h14. express your answer using two significant figures. n n = nothing mol request answer provide feedback
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STEM 11
1.How many moles of carbon dioxide does 250 grams of the substance have? How many molecule...
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