Question

- 2. (4 points) Suppose 46.9 grams of chromium(III) oxide and 31.5 grams of silicon are combined, and the following reaction occurs. 2 Cr2O3(s) + 3 Si(s) — 4 Cr(s) + 3 SiO2(5) a. What is the theoretical yield (in grams) of silicon dioxide? b. How many chromium atoms can be produced? C. How many grams of chromium(III) oxide will be left over? d. How many grams of silicon will be left over? 3. (2 points) How many oxygen molecules are in a 0.0555 m' container at 942 °C if the pressure 86.4 psi? 4. (3 points) A sample of carbon dioxide gas occupies 4.64 liters at 125 kPa and 38.6 °C. At what temperature (°C) will the carbon dioxide occupy 798 milliliters if the pressure changes to 685 torr? 5. (3 points) a. What is the temperature outside now, as you work on this assignment, in F? Convert this to 'C. b. What is the density of chlorine gas at standard pressure and your outside temperature?

Answer 1

2. Given data, 201203 (8) + 3si (s) →40015) + 3 sioz(s) Mass M moles of cozoz = ob.420 molas mass CICA DADOS s 4699 kn 151.9991 moi 2013086 moi ! HINDI moles of Sin massa de M oto molas mass CORREO 31.5 9 24 28.08 gimo = 1.122 mol. a) Theoretic yield of są is, From seaction, 2 moles of Cozez produces 3 moies of Si02. 0:3086 molès Of C8203 poroduces X013086 moles 30.4629 moles, Theoretical yield = moles x molag mass =014629 Moles y 60.08 gimo = 27.819. be forom the deaction, 2 moies of C2203 Produceo y moles of co 0-3086 moles of C0203 Porodences - 4x0.3086

-0.6172 mol Astoms of chromium poroduced + BROOS = 0.46172 Y 6.023 X1023 = 3.72X1023 atoms o 1947 C. AS coroz is limiting reagent. The colore geams of CO2O3 will be loften so, grams of cromium oxide lefet zog von di AS Silicon has 1.122 mol and 3% (0.3086) es used non l122 x 3X D30cc) >> 1.122 -0.9258 Bu bi 30.1962 mO! Creams Of Silicon left over -0.1962 mo1x28-08G/ ma - 5:59