1) The sum of oxidation numbers of all atoms in K2Cr2O7 equals zero? 2) One mole...
1) The sum of oxidation numbers of all atoms in K2Cr2O7 equals zero?
2) One mole of water contains 6.022 x 10^23 hydrogen atoms?
3) The following reaction is unbalanced, what are the coefficients of a balanced equation
Fe(NO3)3(aq)+Na2CO3(aq)-------->Fe2(CO3)3(s)+NaNO3(aq)
4) Using your Balanced equation. What is the net ionic equation? You have to balance question #3 in order to answer this question.
Fe(NO3)3(aq)+Na2CO3(aq)-------->Fe2(CO3)3(s)+NaNO3(aq)
Homework Answers
1) K2Cr2O7 is a neutral compound and sum of oxidation number of elements is zero. True
2) 1 mole of water (H2O) contains 2*6.023*10^23 atoms of H. So, the given statement is false.
3) Balanced reaction,
2Fe(NO3)3(aq) + 3Na2CO3(aq) -----> Fe2(CO3)3(s) + 6NaNO3(aq)
4) 2Fe(3+)(aq) + 6NO3(-)(aq) + 6Na(+)(aq) + 3CO3(2-) ----> Fe2(CO3)3(s) + 6Na(+)(aq) + 6NO3(-)(aq)
2Fe(3+)(aq) + 3CO3(2-)(aq) ----> Fe2(CO3)3(s)
Add Answer to:
1) The sum of oxidation numbers of all atoms in K2Cr2O7 equals
zero?
2) One mole...
Identify the species (atoms/ elements) undergoing oxidation and reduction in the following equations, assign oxidation numbers...
Identify the species (atoms/ elements) undergoing oxidation and
reduction in the following equations, assign oxidation numbers to
each, and write balanced net ionic equations.
a) Cu(s)
Cu2+(aq) + 2e-
b) Cl2(aq) + 2e-
Cl-(aq)
c) Cu(s) + Cl2(aq)
Cu2+(aq) + 2Cl-(aq)
d) 4CuO(s) + CH4(g)
4Cu(s) + CO2(g) + 2H2O(l)
e) 2CuSO4(aq) + 4KI(aq)
2CuI (aq) + 2K2SO4(aq) +
I2(aq)
f) Cu2O(s) + Fe(SO4)3 (aq) +
H2SO4(aq)
2CuSO4(aq) + 2FeSO4(aq) +
H2O(l)
1- Select True or False: The oxidation number of iodine increases by 6 in the following...
1- Select True or False: The oxidation number of iodine increases by 6 in the following reaction. 2MnO4– + I– + H2O → 2MnO2 + IO3– + 2OH– True False 2- Shown here is the balanced molecular equation that would occur between CaCl2(aq) and Na2CO3(aq). Which of the following is the balanced net ionic equation? Molecular equation: CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + 2NaCl(aq) None of the above Net ionic equation: Ca2+(aq) + CO32–(aq) → Ca2+(aq) + CO3(aq) Net ionic...
Can you tell me the oxidation numbers for 1. 2. 3. 4. 5. 6. Experiment 11:...
Can you tell me the oxidation numbers for 1. 2. 3. 4. 5. 6.
Experiment 11: Exploring Types of Reactions Single Displacements Balance the single displacement (Redox) reactions below. Report your observations of the reaction in the space provided. Balance the reaction in the full molecular, full ionic, and net ionic forms. The net ionic form represents the essential reaction, ignoring spectators. It is obtained by canceling components that appear on both sides of the full ionic equation. __Mg(s) +...
RODOX EXAMINATION An oxidation-reduction reaction involves the (1) sharing of electrons &n
RODOX EXAMINATION An oxidation-reduction reaction involves the (1) sharing of electrons (3) transfer of electrons (2) sharing of protons (4) transfer of protons In this reaction, CO→ 2 CO + O2 the oxidation number of carbon changes from: (1) 0 to +4 (3) +3 to 0 (2) +2 to +4 (4) +4 to +2 Which balanced equation represents a redox reaction? AgNO3 (aq) +NaCl (aq) →AgCl (s) +NaNO3 (aq) H2CO3 (aq)...
31). 31) To convert a given number of moles into the number of atoms, one would...
31). 31) To convert a given number of moles into the number of atoms, one would multiply by which of the following factors? A) 1.66 x 10-24 atoms/1 mol B) 1 mol/6.022 x 1023 atoms C) molar mass D) 6.022 x 1023 atoms/1 mol E) 1 mol/1.66 x 10-24 atoms 32) 32) How many atoms of sulfur are present in a 155 g sample of sulfur? [Molar mass: S, 32.06 g/mol] A) 6.02 x 1023 atoms B) 2.91 x 1023...
e precipitate that forms when solutions of Na3PO4 and Fe(NO2)3 are mixed? 43) 2) What is...
e precipitate that forms when solutions of Na3PO4 and Fe(NO2)3 are mixed? 43) 2) What is the precini A) Fe3PO4 B) PO4NO3 C) NaFe D) NaNO3 E) FePO4 RUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 44) One atomic mass unit is the same as one gram. 45) In electrolysis, electrical energy is used to drive a non-spontaneous oxidation-reduction reaction to occur. 45) - 46) One mole of iron contains 6.022 x 1023...
Oxidation Numbers 1. Assign oxidation numbers to the atoms in each of the following. a) SO2...
Oxidation Numbers 1. Assign oxidation numbers to the atoms in each of the following. a) SO2 d) Mgl b) HCIO e) CaH c) Cr,0,2 f) Fe, 2. For each of the following: •assign oxidation numbers •indicate whether the equation represents a redox reaction .if redox, identify OA and RA a) Cu + 2 AgNO, 2 Ag + Cu(NO3)2 b) Pb(NO3)2 + 2 KI Pbl, + 2 KNO, c) Cl2 + 2 KI I2 + 2 KCI d) 2 NaCl 2...
4. True False section circle one (1 pts each) A) T F 1 mole of atoms...
4. True False section circle one (1 pts each) A) T F 1 mole of atoms or molecules is 6.022 x 1023. T F F F The net ionic equation for many acid base reactions is H + OH + H2O A copper solution turning from clear to green is the sign of a chemical reaction. If a metal goes from a solid to cation in solution it has been oxidized if in a reaction, the reactant iron (III) becomes...
Assign oxidation numbers to all of the atoms of each element in the following reaction a) Cu(s) + NO3-1(aq) => &...
Assign oxidation numbers to all of the atoms of each element in the following reaction a) Cu(s) + NO3-1(aq) => Cu+2(aq) + NO(g) The oxidizing agent in this reaction is_________________ The reducing agent is this reaction is_________________
all 18. Consider the two beakers labeled A and B. Beaker A contains 1 mole of...
all
18. Consider the two beakers labeled A and B. Beaker A contains 1 mole of iron atoms, and Beaker B contains 1 mole of lead atoms. Which statement concerning these samples is known with certainty? A) Beakers A and B contain an equal number of atoms. B) Beakers A and B contain equal masses of atoms. C) Beakers A and B contain an equal volume of atoms. D) Beakers A and B contain samples with the same density E)...
Identify the species (atoms/ elements) undergoing oxidation and
reduction in the following equations, assign oxidation numbers to
each, and write balanced net ionic equations.
a) Cu(s)
Cu2+(aq) + 2e-
b) Cl2(aq) + 2e-
Cl-(aq)
c) Cu(s) + Cl2(aq)
Cu2+(aq) + 2Cl-(aq)
d) 4CuO(s) + CH4(g)
4Cu(s) + CO2(g) + 2H2O(l)
e) 2CuSO4(aq) + 4KI(aq)
2CuI (aq) + 2K2SO4(aq) +
I2(aq)
f) Cu2O(s) + Fe(SO4)3 (aq) +
H2SO4(aq)
2CuSO4(aq) + 2FeSO4(aq) +
H2O(l)
Can you tell me the oxidation numbers for 1. 2. 3. 4. 5. 6.
Experiment 11: Exploring Types of Reactions Single Displacements Balance the single displacement (Redox) reactions below. Report your observations of the reaction in the space provided. Balance the reaction in the full molecular, full ionic, and net ionic forms. The net ionic form represents the essential reaction, ignoring spectators. It is obtained by canceling components that appear on both sides of the full ionic equation. __Mg(s) +...
31). 31) To convert a given number of moles into the number of atoms, one would multiply by which of the following factors? A) 1.66 x 10-24 atoms/1 mol B) 1 mol/6.022 x 1023 atoms C) molar mass D) 6.022 x 1023 atoms/1 mol E) 1 mol/1.66 x 10-24 atoms 32) 32) How many atoms of sulfur are present in a 155 g sample of sulfur? [Molar mass: S, 32.06 g/mol] A) 6.02 x 1023 atoms B) 2.91 x 1023...
e precipitate that forms when solutions of Na3PO4 and Fe(NO2)3 are mixed? 43) 2) What is the precini A) Fe3PO4 B) PO4NO3 C) NaFe D) NaNO3 E) FePO4 RUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 44) One atomic mass unit is the same as one gram. 45) In electrolysis, electrical energy is used to drive a non-spontaneous oxidation-reduction reaction to occur. 45) - 46) One mole of iron contains 6.022 x 1023...
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all
18. Consider the two beakers labeled A and B. Beaker A contains 1 mole of iron atoms, and Beaker B contains 1 mole of lead atoms. Which statement concerning these samples is known with certainty? A) Beakers A and B contain an equal number of atoms. B) Beakers A and B contain equal masses of atoms. C) Beakers A and B contain an equal volume of atoms. D) Beakers A and B contain samples with the same density E)...
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