what is the charge on the chromium ion in Cr2O3. a -3 b -2 c 0...
what is the charge on the chromium ion in Cr2O3.
a -3
b -2
c 0
d +2
e +3
and how to determine the charge on transition metals
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The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2Cr,0,(s) +...
The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2Cr,0,(s) + 3Si(s) — 4Cr(I) +3510,(s) The reaction is begun with 83.00 g of Si and 117.00 g of Cr2O3. 3rd attempt Part 1 (1 point) l See Part 2 (1 point) * Feedback How many grams of the excess reactant are left after the reaction is complete? 100.8 2nd attempt 1st attempt
The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. $$ The...
The reaction of Cr2O3 with silicon metal at
high temperatures will make chromium metal. $$ The reaction is
begun with 134.00 g of Si and 130.00 g of Cr2O3.
The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2Cr203 (s) + 3Si(s) —— 4Cr(1) +3510,(s) The reaction is begun with 134.00 g of Si and 130.00 g of Cr2O3. 1st attempt Part 1 (1 point) I See Periodic Table Select the limiting reactant. Choose one...
3) What is the charge of the central metal ion in Ca3[Fe(CN)6]2? A) 3+ B) 6+...
3) What is the charge of the central metal ion in Ca3[Fe(CN)6]2? A) 3+ B) 6+ C) 2+ D) 1+ E) 0 4) What is the oxidation number of cobalt in [Co(NH 4) 3)4F2]? A) -3 B) +2 C) +6 D) +1 E) +3
The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2Cr2O3(s) +...
The reaction of Cr2O3 with silicon metal
at high temperatures will make chromium metal.
2Cr2O3(s) + 3Si(s) 4Cr(l) + 3SiO2(s)
The reaction is begun with 188.00 g of Si and 110.00 g of
Cr2O3.
A) What is the limiting reactant?
B) How many grams of the excess reactant are left after the
reaction is complete?
ANSWER ALL QUESTIONS PLEASE 1. What are the characteristic electron configurations of transition metals? 2. What is...
ANSWER ALL QUESTIONS PLEASE 1. What are the characteristic electron configurations of transition metals? 2. What is the general trend in atomic size across a transition metal series? 3. Which electrons, 3d or 4s, have the lowest ionization energies in a transition metal? 4. What is the general trend of the reducing strength across a transition metal series? 5. Why do transition metals have similar chemical properties? 6. Name four transition metals that are essential to the biological system. 1. Write the...
QUESTION 10 What is the theoretical yield of chromium (Cr) that can be produced by the...
QUESTION 10 What is the theoretical yield of chromium (Cr) that can be produced by the reaction of 12.2 g of Cr2O3 with 3.10 g of aluminum according to the balanced chemical equation below? 2 Al + Cr2O3 - Al2O3 +2 Cr 45.8 QUESTION 11 How many grams of the excess reagent is left after the reaction has gone to completion? QUESTION 12 If the reaction produced a 65.2% yield, how many grams of chromium were produced?
Determine the number of electrons in each ion. (a) Sc3 + (b) Cu2+ (c) An ion...
Determine the number of electrons in each ion. (a) Sc3 + (b) Cu2+ (c) An ion with 31 protons and a charge of +3 (d) An ion with 63 protons and a charge of +2
1) Predict the charge that a magnesium (Mg) ion would have A) 5- B) 1+ C)...
1) Predict the charge that a magnesium (Mg) ion would have A) 5- B) 1+ C) 1- D) 2+ 2) Predict the charge that an ion formed from sulfur would have. A) 1- B) 6+ C) 3- D) 4+ E) 2- 3) Which of the following does NOT describe a metal? A) good conductor of heat B) good conductor of electricity C) tends to gain electrons D) forms ionic compounds with nonmetals E) found on the left side of the...
- 2. (4 points) Suppose 46.9 grams of chromium(III) oxide and 31.5 grams of silicon are...
- 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...
3) What type of structure is exhibited by most of the transition metals? A) Trigonal planar...
3) What type of structure is exhibited by most of the transition metals? A) Trigonal planar B) Close-packed C) Trigonal pyramidal D) Tetrahedral 10) In the complex ion [Cr(C2O4)2(H20)21, what is the oxidation number of Cr? A) +1 B) -2 C) +3 D) +2 E) -1
The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2Cr,0,(s) + 3Si(s) — 4Cr(I) +3510,(s) The reaction is begun with 83.00 g of Si and 117.00 g of Cr2O3. 3rd attempt Part 1 (1 point) l See Part 2 (1 point) * Feedback How many grams of the excess reactant are left after the reaction is complete? 100.8 2nd attempt 1st attempt
The reaction of Cr2O3 with silicon metal at
high temperatures will make chromium metal. $$ The reaction is
begun with 134.00 g of Si and 130.00 g of Cr2O3.
The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2Cr203 (s) + 3Si(s) —— 4Cr(1) +3510,(s) The reaction is begun with 134.00 g of Si and 130.00 g of Cr2O3. 1st attempt Part 1 (1 point) I See Periodic Table Select the limiting reactant. Choose one...
The reaction of Cr2O3 with silicon metal
at high temperatures will make chromium metal.
2Cr2O3(s) + 3Si(s) 4Cr(l) + 3SiO2(s)
The reaction is begun with 188.00 g of Si and 110.00 g of
Cr2O3.
A) What is the limiting reactant?
B) How many grams of the excess reactant are left after the
reaction is complete?
QUESTION 10 What is the theoretical yield of chromium (Cr) that can be produced by the reaction of 12.2 g of Cr2O3 with 3.10 g of aluminum according to the balanced chemical equation below? 2 Al + Cr2O3 - Al2O3 +2 Cr 45.8 QUESTION 11 How many grams of the excess reagent is left after the reaction has gone to completion? QUESTION 12 If the reaction produced a 65.2% yield, how many grams of chromium were produced?
1) Predict the charge that a magnesium (Mg) ion would have A) 5- B) 1+ C) 1- D) 2+ 2) Predict the charge that an ion formed from sulfur would have. A) 1- B) 6+ C) 3- D) 4+ E) 2- 3) Which of the following does NOT describe a metal? A) good conductor of heat B) good conductor of electricity C) tends to gain electrons D) forms ionic compounds with nonmetals E) found on the left side of the...
- 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...
3) What type of structure is exhibited by most of the transition metals? A) Trigonal planar B) Close-packed C) Trigonal pyramidal D) Tetrahedral 10) In the complex ion [Cr(C2O4)2(H20)21, what is the oxidation number of Cr? A) +1 B) -2 C) +3 D) +2 E) -1
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