Question: The diffusion coefficient for O2 - in Cr2O3 is 4×10−15 cm2/s at 1150∘C and 6×10−11 cm2/s at 1715∘C. Calculate (a) the activation energy; and (b) the constant D0. Show transcribed image text

2016年7月26日 · "Cr"_2"O"_3 The first thing to notice here is that you're dealing with an ionic compound that contains chromium, "Cr", a transition metal, and oxygen, "O", a non-metal. The interesting thing about this compound is that it contains a transition metal as its cation, i.e. its positively charged ion. As you know, the name of a transition metal cation is written using …

How many grams of Cr2O3 is produced if 0.185 grams of chromium metal is converted completely to the oxide? Chromium metal can be produced by the reduction of Cr2O3 with elemental silicon: 2 Cr2 O3 + 3 Si --> 4 Cr + 3 SiO2 If 350.0 grams of Cr2O3 are reacted with 235.0 grams of elemental silicon and 213.2

The diffusion coefficient for Cr3+ in Cr2O3 is 6x10^-15 cm2/s at 727°C and 1x10-9 cm2/s at 1400°C. Calculate (a) the activation energy; and

Which atom has a change in oxidation number of +4 in the following redox reaction? K2Cr2O7 + H2O + S arrow KOH + Cr2O3 + SO2; In the chemical reaction shown below, which element was oxidized? 2K + Cl2 arrow 2KCl A. K because it lost one electron B. K because it gained one electron C. Cl because it lost one electron D. Cl because it gained one ...

Question 9 Consider this reaction: 2Al + Cr2O3 → Al2O3 + 2Cr If the percent yield of Al2O3 was 66.4% and 17.3 g of Al2O3 were experimentally isolated, what mass of aluminum was reacted? Selected Answer: Answers: 13.8 g 2.50 g 4.73 g 17.4 g 13.8 g 5 out of 5 points 29.9 g

Answer to: What is the correct name for the compound Cr2O3? By signing up, you'll get thousands of step-by-step solutions to your homework...

Question: "Give the name for the compound Cr2O3. Use a roman numeral in parentheses to indicate the charge of the metal ion."

If the liquid phase was determined to have a composition of 20 wt% Cr2O3- 80 wt% Al2O3 – what is the Answer the questions below based on the Al2O3-Cr2O3 phase diagram a) For a sample of composition 30 wt% Cr2O3- 70 wt% Al2O3 starting from the liquid state, upon cooling we reach a temperature at which a solid phase and a liquid phase coexist ...

Chromium (III) oxide has a molecular formula of Cr2O3 and is comprised of two chromium atoms and three oxygen atoms. It is primarily used as a pigment and produces a bright green color in paint. It is also a polishing compound used to even and sharper the edges of knives or finish the surface of glasses, telescopes, and microscopes.