05/18/21

Practice #2 questions
1.      What is the greatest amount of magnesium oxide in moles that can be made with 6.3 mol Mg and 6.9 mol O2? Which reactant is limiting? How many moles of the excess reactant will be left... more
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05/18/21

The equilibrium constant for a certain reaction is found to be 2.0x10⁴ at a certain temperature. What is the value of the equilibrium constant for the reverse reaction?
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05/17/21

If I have 37 moles of gas at a pressure of 91 kPa and at a temperature of 126 0C, what is the volume of the container that the gas is in?
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05/17/21

How do I solve this type of question
The reaction represented by the balanced chemical equation was studied at 25 oC. The initial rate of reaction was determined by measuring the rates of change in the concentrations of I− (aq) and... more
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05/17/21

Madison prepares solid titanium(IV) oxide by reacting 6.71 x 103 g of titanium(IV) chloride with 2.45 x 103 g of oxygen.    TiCl4(g) + O2(g) --> TiO2(s) + 2Cl2(g)
a) Calculate the number of moles of titanium(IV) chloride and oxygen.b) Which one is the limiting reactant?c) Calculate the maximum moles of titanium(IV) oxide that can form.d) Calculate the the... more
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05/17/21

Alexa  wants to name the following binary compounds. Complete the following table. 
Compound Type Name  CrCl3       Type III  dinitrogen monoxide  NaCl    
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05/17/21

Please help me solve this

Phosgene, COCl2(g) is an extremely toxic gas. It was used during World War 1. Today it is used to manufacture pesticides, pharmaceuticals, dyes, and polymers. It is prepared by mixing carbon... more
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05/17/21

How many grams of calcium fluoride are present in 107.0 g of a 26.0% calcium fluoride in water solution?
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05/17/21

Thermochemical Equation
When a sample of 134.28 g NH4NO3 dissolves in 55.01 g of water, the temperature changes from 25.72 C to 8.24 C. Calculate the heat of reaction in kJ/mol for this reaction (write answer to... more
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05/17/21

Mohammad learned that the number of significant figures for a given measurement is determined by the inherent uncertainty of the measuring device.
Carry out the following mathematical operations, and give each result to the correct number of significant figures. a) 5.18 x 0.0208b) 21 + 13.8 + 130.36
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05/17/21

Mn{+2} + KIO4 --> MnO4 + *what?*
In class we were tasked with writing a balanced reaction for when Mn2+ reacts with KIO4 to form MnO4-. However, we were only told the resulting substance from the oxidation part of the redox... more
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05/17/21

What mass of copper will be produced from 250 mL of a 0.8 M copper (II) chloride solution?

Equations would be greatly appreciated, biggest problem is that I've forgotten them and we're doing a year review.
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05/17/21

Molarity Practice
7. Calculate the mass of glucose (C6H12O6) in a 155 mL sample of a 1.18 M glucose solution.        
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05/17/21

Molarity Practice
8. A laboratory procedure calls for making 580.0 mL of a 1.2 M KNO3 solution.How much KNO3 in grams is needed?        
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05/17/21

Molarity Practice
9. What volume of a 0.31 M Mg(NO3)2 solution contains 88 g of Mg(NO3)2?
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05/17/21

Is this correct?
HEX3(aq) + H2O(l) ⇌ H3O+(aq) + EX3−(aq)∆Go = +47 kJ/molrxnThe reaction between the acid HEX3(aq) and water is shown above. Based on the chemical equation and the value of ∆Go given above, which of... more
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05/17/21

is this correct?
2 EMZ3(g) ⇌ 2 EZ3(g) + M2(g)∆Gorxn = −350 kJ/molrxnA small sample of EMZ3 is placed into an evacuated, rigid metal container and allowed to reach equilibrium. Based on the value of ∆Go and the... more
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05/17/21

is this correct?
Sr2+(aq) + F-(aq) ⇄ SrF+(aq)At 25°C, the equilibrium constant for the reaction represented above has a value of 1.3. At 50°C, the value of the equilibrium constant is less than 1.3. Based on this... more
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05/17/21

is this correct
Fe2+(aq)+Zn(s)→Fe(s)+Zn2+(aq)E°cell=+0.32VA galvanic cell generates a cell potential of +0.32V when operated under standard conditions according to the reaction above. Which of the following pairs... more
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05/17/21

is this correct
M(s) + 3 Ag+(aq) → 3 Ag(s) + M3+(aq)    E° = + 2.06 VAg+(aq) + e- → Ag(s)                   E° = + 0.80 VAccording to the information above, what is the standard reduction potential for the... more
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05/17/21

is this correct
Cu(s) + 2 Ag+ → Cu2+ + 2 Ag(s)If the equilibrium constant for the reaction above is 3.7 x 1015, which of the following correctly describes the standard voltage, E˚, and the standard free energy... more
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05/17/21

Write the abbreviated electron configuration for Al2+
Write the abbreviated electron configuration for Al2+
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05/17/21

what does sulfur dioxide reacts with water make

SO2(g) + H2O(l) -->
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05/17/21

45.5 mL of a 1.25 M solution of ammonium chloride and 23.8 mL of a 1.55 M solution of lead(II) nitrate are added together. Does a reaction occur?
If a reaction occurred, what is the molarity of each free ion when the reaction is over? Summarize values on the table below. Clearly show all work used to determine each amount.IonInitial # of... more
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05/16/21

Sarah finds a compound has 71.65% Cl, 24.27% C and 4.07% H. The molar mass of this compound is known to be 98.96 g.
a) Determine how many grams of each element are present in 100.0 g of this compound.b) Determine the number of moles of each element present in 100.0 g of this compound.c) Determine the empirical... more
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