01/15/22

In a saturated solution of Al(OH)₃, the concentration of OH⁻ is 2.6 x 10⁻⁵ mol/L. The concentration of Al³⁺ in mol/ L is which of the following?
7.8 x 10⁻⁵ 8.7 x 10⁻⁶ 7.8 x 10⁻¹⁵ 2.6 x 10⁻⁵ 5.2 x 10⁻⁵
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01/15/22

chemistry question
At 60°C, the reaction, PCl₅(g) ⇌ PCl₃(g) + Cl₂(g) has a K value of12.5. If the reaction quotient, Q, calculated from initial concentrations is 19.8 at 60°C, which of the following statements is... more
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01/14/22

Limiting Reactants

Liquid hexane CH3CH24CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 6.9 g of hexane is mixed with 31.9 g of oxygen. Calculate the maximum... more
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01/14/22

CALCULATE THE NUMBER OF MOLES IN 180.0 g Ca

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01/14/22

How many grams of HCIO3 can be produced from 7.2 g of C/O2 according to the following reaction? (7.5 g HCIO3) 6 CI02 + 3 H20 - 5 HCIO + HCI
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01/14/22

How many moles of SO2 are required to convert 6.8 g of HaS according to the following reaction? (0.10 g S02) 2 HaS + S02 - 3 S + 2 H20
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01/14/22

In + Cr2O72− → In3+ + Cr3+ Reduction, oxidation, and net

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01/13/22

Balancing an equation: C4H10 + O2 --> CO2 + H2O
I know how to balance an equation but this one, in particular, seems a bit hard. I kept the C4H10 the same and for the O2 on the reactants side I end up having to put 30? Here's my work:C4H10 + O2... more
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01/13/22

What is the pH of the buffer formed by mixing 50 mL of 0.2 M NaH2PO4 with 50 mL of 0.12 M NaOH. ( Ka1(H3PO4)= 7.11x10-3 Ka2(H3PO4)= 6.32x10-8 Ka3(H3PO4)= 4.5x10-13 )
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01/13/22

electrochemistry
Determine the standard cell potential for the following galvanic cell: Ag(s) | Ag + (aq) || Mg 2+ (aq) | Mg(s)
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01/12/22

pH Calculating

Calculate the pH of a solution prepared by dissolving 2.25 g lactic acid (90 g/mol) in 100 mL of 0.25 M NaOH solution. ( Ka (lactic acid)= 1.38x10-4 )
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01/12/22

Buffer solution pH calculation
What is the pH of the buffer formed by mixing 50 mL of 0.2 M NaH2PO4 with 50 mL of 0.12 M HCl. ( Ka1(H3PO4)= 7.11x10-3 Ka2(H3PO4)= 6.32x10-8 Ka3(H3PO4)= 4.5x10-13 )
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01/12/22

What would be the new volume if the pressure on 600 mL is increased from 90 kPa to 150 kPa? (Answer = 360mL)
What would be the new volume if the pressure on 600 mL isincreased from 90 kPa to 150 kPa? (Answer = 360mL)
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01/12/22

2 NH3  +  3 CuO  --> 3 Cu  +  N2  +   3 H2O
2 NH3  +  3 CuO  --> 3 Cu  +  N2  +   3 H2OIn the above equation how many moles of N2 can be made when 187.7 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a... more
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01/12/22

How would you Slove this qestion?
Caproic acid, C5H11COOH, occurs naturally in coconut and palm oil. It is a weak monoprotic acid, with Ka=1.3x10-5. A certain aqueous solution of caproic acid has a pH of 2.94. How much acid was... more
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01/12/22

How would you slove this qestion?
Sodium acetate, CH3COONa, is used for developing photographs. Find the value of Kb for the acetate ion. Then calculate the pH of a solution that contains 12.5 g of sodium acetate dissolved in 1.00... more
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01/12/22

How would you slove this qestion?
Sodium acetate, CH3COONa, is used for developing photographs. Find the value of Kb for the acetate ion. Then calculate the pH of a solution that contains 12.5 g of sodium acetate dissolved in 1.00... more
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01/12/22

Chemistry Help Please
S   +   6 HNO3 →  H2SO4  +  6 NO2  +   2 H2OIn the above equation, how many grams of water can be made when 12.8 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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01/12/22

For the equilibrium system below, which of the following would result in an increase in the concentration of CO(g)?
decreasing the temperature adding a catalyst decreasing [CH₃OH] increasing the volume increasing [H₂]
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01/12/22

The table below summarizes the experimental observations for the reaction shown. Use the data to answer the questions below.

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01/12/22

Shown below is a proposed mechanism for the overall reaction between HBr and oxygen. Which statement regarding the mechanism is correct?
the rate-determining step is step 2 H₂O(g) is a reaction intermediate step 1 is bimolecular the rate law for the overall reaction is r = k[HBr]⁴[O₂] the reaction will go faster if [Br₂] is increased more
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01/12/22

Determine the activation energy for the catalyzed reaction from the potential energy diagram below. 
75 KJ 25 KJ 15 KJ 10 KJ 90 KJ
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01/12/22

Determine the enthalpy change for the following reaction shown below using the bond energies listed in the box on the right.
- 544 kJ - 1130 kJ + 1130 kJ + 544 kJ + 21 kJ
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01/12/22

Given the following thermochemical step equations below, calculate ΔH for the target reaction: PCl₅(g) → PCl₃(g) + Cl₂(g)
- 5880 kJ + 1000 kJ + 250 kJ - 250 kJ – 1000 kJ
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01/12/22

The structural diagram of glycine is shown below. Choose the correct statement regarding glycine
the N - C₂ - C₁ bond angle is 109.5° the geometric shape around carbon 2 is trigonal pyramidal this molecule has two pi bonds both carbon 1 (carboxyl carbon) and 2 have the same hybridization this... more
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