04/26/21

How many moles of electrons (n) are transferred between the oxidizing agent and the reducing agent in the following overall redox reaction?

5 Ag+(aq) + Mn2+(aq) + 4H2O(l) → 5 Ag(s) + MnO4-(aq) + 8H+(aq)
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04/26/21

HI has a normal boiling point of -35.4°C, and its ΔHvap is 21.16 kJ/mol. Calculate the molar entropy of vaporization (ΔSvap).

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04/26/21

A galvanic cell has the following overall reaction: Zn(s) + 2Eu(NO3)3(aq) → Zn(NO3)2(aq) + 2Eu(NO3)2(aq) What is the half reaction that occurs at the CATHODE?
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04/26/21

Answer this & explain im so confused

I think the correct answer is the second one but not sure..A solution is prepared by mixing equal volumes of 0.20M HC2H3O2 and 0.40M NaC2H3O2. Which of the following correctly describes what occurs... more
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04/26/21

Please help I’m so confused

When lead (II) sulfide is burned in air, lead (II) oxide and sulfur dioxide are produced. If 0.890 moles of sulfur dioxide were produced, how many moles of oxygen gas were required to react with... more
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04/26/21

A 25.0 mL solution of HNO₃ is neutralized with 17.6 mL of 0.250 M Ba(OH)₂. What is the concentration of the original HNO₃ solution?
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04/26/21

ASAP Show all workout and answer all parts ( Im just reviewing for AP exams so its not graded, but I want it to help me.
A weak acid, HZ, has a Ka value of 6.52 x 10-5.(a) Write the reaction of HZ with water. (b) Write the equilibrium expression for the reaction of HZ with water.(c) Calculate the pH of a... more
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04/25/21

A mixture of He , N2 , and Ar has a pressure of 12.0 atm at 28.0 °C. If the partial pressure of He is 2381 torr and that of Ar is 2249 mm Hg, what is the partial pressure of N2 ?
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04/25/21

Consider a galvanic cell in which Al3+ is reduced to elemental aluminum and magnesium metal is oxidized to Mg2+ . Write the balanced half-cell reactions that take place at the cathode.
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04/25/21

Balance the redox reaction by inserting the appropriate coefficients.
H2O + Br- + Al^3+ --> Al + BrO3^- + H+
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04/25/21

2Mg (s) +O 2(g) 2MgO (s) How many moles of solid magnesium are required to form 10.00 moles of Magnsium oxide?
2Mg (s) +O 2(g) 2MgO (s) How many moles of solid magnesium are required to form 10.00 moles of Magnsium oxide?
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04/25/21

2Mg (s) +O 2(g) 2MgO (s) How many moles solid magnesium are required to form 10.00 moles of Magnsium oxide?
2Mg (s) +O 2(g) 2MgO (s) How many moles solid magnesium are required to form 10.00 moles of Magnsium oxide?
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04/25/21

How many moles of H 3 PO 4 are produced when 82.2 g P4010 reacts completely to form H 3 PO 4 ?P 4 O 10 (s)+6H 2 O(l) 4H 3 PO 4 (aq) Answer in standard notation to two decimal places.
How many moles of H 3 PO 4 are produced when 82.2 g P4010 reacts completely to form H 3 PO 4 ?P 4 O 10 (s)+6H 2 O(l) 4H 3 PO 4 (aq) Answer in standard notation to two decimal places.
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04/25/21

Please help with this question
1.3 Provide the common name for each of the following compounds:1.3.1 Ethanoic acid1.3.2 1,2,3-propantriol
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04/25/21

Please help with this question! Given a solution with a pH of 2, determine the pOH of the solution. Type in a numerical answer.
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04/25/21

What pressure is exerted by 727.2 g of CH4 in a 0.950 L steel container at 221.9 K ?
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04/25/21

A balloon is filled with 1.00 mole of hydrogen gas. Using the ideal gas law, calculate the volume (𝑉) of the balloon at standard temperature and pressure (STP).
I need help please, like i get confused when setting the Ideal Gas Law.
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04/24/21

A chemist wants to extract the gold from 69.59 g of AuCl3 · 2 H2O (gold(III) chloride dihydrate) by electrolysis of an aqueous solution. What mass of gold could be obtained from this sample?
A chemist wants to extract the gold from 69.59 g of AuCl3 · 2 H2O (gold(III) chloride dihydrate) by electrolysis of an aqueous solution.What mass of gold could be obtained from this sample? Answer... more
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04/24/21

0.05g of magnesium react in 23.92mL of 2M formic acid (HCOOH, Ka=1.8x10-4). Determine the resulting pH.
0.05g of magnesium react in 23.92mL of 2M formic acid (HCOOH, Ka=1.8x10-4). Determine the resulting pH.
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04/24/21

Consider the two reactants below: Iron (III) nitrate + Magnesium sulfate Write out the whole reaction (using chemical formulas)
make sure to include aqueous or not for each reactant and each product!
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04/24/21

The pH equation is pH = -log [H+] It is a log base 10 equation. How does the concentration of a pH 5 solution compare to a pH 6 solution?
The pH equation is pH = -log [H+] It is a log base 10 equation. How does the concentration of a pH 5 solution compare to a pH 6 solution?
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04/23/21

The temperature of a 85.6 g piece of a material increases from 21.0 C to 35.00 when it absorbs 648 J of heat. What is the specific of this substance?
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04/23/21

How many kilojoules of heat are produced when 4.20 mol Fe^2O^3 with unlimited CO using the following reaction : Fe 2 O 3 +3CO 2Fe+3CO 2 +26.3 kJ
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04/23/21

If exactly 65.1g of nitrogen is needed to inflate an airbag to the correct size, how many grams of NaN3 would you need to decompose?
I think this would be the balanced equation? 2 NaN3 --> 2Na + 3N2
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04/23/21

If exactly 65.1g of nitrogen is needed to inflate an airbag to the correct size, how many grams of NaN3 would you need to decompose?
I think this would be the balanced equation? 2 NaN3 --> 2Na + 3N2
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