01/05/22

2 Al + 6HBr → 2AlBr3 + 3H2 Non-negotiable (must solve): What is the limiting and excess reagent if 45.6g of Al reacted with 43.7g of HBr?
2 Al + 6HBr → 2AlBr3 + 3H2Non-negotiable (must solve):What is the limiting and excess reagent if 45.6g of Al reacted with 43.7g of HBr?Negotiable (Solve a and one more of your choice):a) How much... more
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01/04/22

Chemistry Questions
Which of the following gases effuses most rapidly?Select one:a. Carbon monoxideb. Oxygenc. Nitrogend. Ammoniae. Hydrogen chlorideArrange the following gases in order of increasing rate of... more
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01/04/22

Questions about Gases
A weather balloon was initially at a pressure of 0.950 atm, and its volume was 35.0 L. The pressure decreased to 0.750 atm, without loss of gas or change in temperature. What was the change in the... more
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01/04/22

When glucose is converted to pyruvate, what are the byproducts? a. ______________ b._______________
When glucose is converted to pyruvate, what are the byproducts? a. ______________ b._______________
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01/04/22

The value of ΔH for the potential energy diagram in Image 2 is? 
The value of ΔH for the potential energy diagram in Image 2 is?  40 kJ 25 kJ 135 kJ - 40 kJ - 25 kJ IMAGE 2
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01/04/22

The value of Ea for the potential energy diagram in Image 2 is?
The value of Ea for the potential energy diagram in Image 2 is?  25 kJ - 65 kJ - 40 kJ 40 kJ - 25 kJ IMAGE 2
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01/03/22

C2H4 + 3O2 → 2CO2 + 2H2O At STP, 56.2L of C2H4 reacts with 42.6g of O2 What is the limiting reagent? What is the mass of CO2 expected?
C2H4 + 3O2 → 2CO2 + 2H2OAt STP, 56.2L of C2H4 reacts with 42.6g of O2 What is the limiting reagent? What is the mass of CO2 expected?
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12/29/21

Can you please tell how electrons are formed in cathodes, and WHY are they even forming?? HOW can electricity make an anode metal loose electrons??
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12/26/21

What is Entropy

I am confused with what is degree of randomness and how it is related to entropy
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12/25/21

What do you think if, there are two tubes containing the enzyme and substrate (A and B), tube A is the control. and if we double the enzyme levels in tube B; how about Km and Vmax in tube B ?

(whether constant or increasing, I intentionally didn't include the amount of enzyme levels.)
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12/22/21

Nitrogen gas and hydrogen gas are combined in a reaction to produce ammonia. If 6.0 moles of N2 and 6.0 moles of H2 are present in the mixture, which is the limiting reactant?

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12/21/21

can someone help me? i have to write BrCH=CHBr+Br_2\Rightarrow , its halogenation of Alkyne

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12/21/21

Calculate for pH related problem
Determine the pH of a 0.25M aqueous solutiob of KF,in which the Ka of HF is 3.5 x 10-5
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12/21/21

A 0.110 L sample of an unknown HNO3 solution required 35.3 mL of 0.100 M Ba(OH)2 for complete neutralization. What is the concentration of the HNO3 solution?
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12/21/21

What volume of a 0.390 M NH4I solution is required to react with 227 mL of a 0.320 M Pb(NO3)2 solution? How many moles of PbI2 are formed from this reaction?
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12/20/21

Consider the following equilibrium: 2O3 (g) ↔ 3O2 (g) Keq = 36
What is the concentration of O3 when the equilibrium concentration of O2 is 6.0 X 10 - 2 mol/L?Select one:a. 6.0 X 10 - 2 mo/Lb. 4.0 X 10 - 2 mol/Lc. 9.0 X 10 - 2 mol/Ld. 2.4 X 10 - 3 mol/L
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12/20/21

In general, increasing the temperature of the solvent _________.
Select one:a. Affects the solubility of solid solutes onlyb. Increases the solubility of solid, liquid, but decreases the solubility of gaseous solute.c. Increases the solubility of liquid solutes,... more
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12/20/21

26.4 g of hydrogen, H2, is produced from 100.0 g of methane, CH4, reacting with excess water as shown, what is the percentage yield? CH4 (g) + H2O (g) → CO (g) + 3 H2 (g)
Select one:a. 100%b. 69.9%c. 23.4%d. 57.1%
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12/20/21

Identify which substance will undergo oxidation and reduction. Then, indicate the oxidizing and reducing agent. 2 Al + 3FeSO4 → Al2(SO4)3 + Fe
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12/19/21

0.5436g of liquid benzene c6h6 is burned with excess o2 in a constant pressure calorimeter
0.5436g of liquid benzene c6h6 is burned with excess o2 in a constant pressure calorimeter, producing CO2 and H2O asthe only products. The temperature of the calorimeter, which has a heat capacity... more
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12/19/21

What is the pH of 0.35 M NH3 aqueous solution if the Kb for NH3 is 3.5 x 10-5?
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12/19/21

Determine the pH of a 0.25 M aqueous solution of KF, in which the Ka of HF is 7.0 x 10-4
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12/19/21

What is the pOH value of a solution that consists of 1.94 x 10-5 M hydrogen ions?
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12/19/21

What is the pH of an aqueous solution that contains 0.0035 M of [OH-]?
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12/19/21

Chemistry pH pOH Questions
A chemi‎cal fac‎tory has be‎en illeg‎ally disp‎osing their che‎mical wast‎es wi‎thout necessary pret‎reatments dire‎ctly onto a riv‎er. To asse‎ss the ext‎ent of con‎tamination, the H+... more
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