10/19/21

Calculate Kp for the following reaction at 500.0°C

3NO(g) <--> N2O(g) + NO2(g) using the free-energy data for the following reaction at the same temperature.6NO(g) <--> 2N2O(g) + 2NO2(g)  ΔG° = −209.1 kJ 
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10/19/21

Calculate the heat required in Joules to convert 18.0 grams of water ice at a temperature of -20° C to liquid water at the normal boiling point of water.
Calculate the heat required in Joules to convert 18.0 grams of water ice at a temperature of -20° C to liquid water at the normal boiling point of water. Given: -specific heat of ice = 2.09 J/g°C... more
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10/19/21

Can someone please check-over my answers to these questions on catalysts?
Which of the following statements is true?A. The rate of all chemical reactions doubles for every 10 oC increase in temperature.B. Decreasing the activation energy of a reaction decreases the... more
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10/19/21

Calculate all the ions present in the solution when 45 mL of 0.23 M mercury (II) nitrate is mixedwith 95 mL of lead (IV) nitrate.

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10/19/21

What does adding a catalyst to a reaction do? Select all that apply.
alter the orientation of reactants in the reaction lower the activation energy of the reaction increase the rate of the reaction increase the amount of each product formed by the reaction
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10/19/21

What happens when there is an increase in temperature for a reaction rate? Select all that apply.
It increases the chance that the reaction will be endothermic It increases the activation energy of a reaction It increases the total number of molecular collisions that occur It increases the... more
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10/19/21

Why do you add water to the reaction product and heat again before recording the final mass?
Lab 8, Empirical formula of Magnesium oxide.
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10/19/21

Calculate the mass in grams of BaCl2 that will be required to produce 47.5 grams of Ba3(PO4)2.
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10/19/21

ap chem question
For each of the following write the blanched, net ionic reaction.a) Solid zinc hydroxide is sprinkled into a solution of iron (III) acetateb) A solution of cesium chloride has bromine liquid... more
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10/19/21

Starting with the following equation, MgCl₂(aq) + Na₃PO₄(aq) → Mg₃(PO₄)₂(s) + NaCl(aq) calculate the moles of MgCl₂ that will be required to produce 545 grams of Mg₃(PO₄)₂.
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10/18/21

What is the concentration in %m/v of a 0.631 M aqueous solution of propylene glycol (MM = 76.09 g/mol)?
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10/18/21

General Chemistry

For the following reaction, identify the number of moles of SO2 and CrO42– required to form 1 mole of Cr2(SO4)3. Enter your answers as integers.2CrO4 2−+ 3SO2 +4H+ > Cr2(SO4)3 +2H2OMoles of... more
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10/18/21

4HCl(aq)+MnO2(s)⟶MnCl2(aq)+2H2O(l)+Cl2(g) A sample of 38.5 g MnO2 is added to a solution containing 50.3 g HCl. What is the limiting reactant?
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10/18/21

How much of a stock solution of 10.0 mg/L phosphate standard, do you need to use to make a final solution containing a volume of 3 mL and 5.3 mg/L phosphate?
Enter your numerical answer to one decimal place, the units are assumed to be milliliters.
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10/18/21

A piece of copper at 125c
A piece of copper at 125 °C is placed in a styrofoam coffee cup containing 29.0 g water at 25.0 °C. The final temperature of both substances at thermal equilibrium is 35.0 °C. Assuming that no heat... more
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10/18/21

What is the mass, in grams, of 0.150 moles of I2?
I2 is the accurate style for iodide in the question above.
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10/18/21

Explain the role of a salt bridge in a voltaic cell.
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10/18/21

In order for a reaction to happen spontaneously, which reaction (oxidation or reduction) needs to be higher on the redox table? Why?

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10/17/21

Calculate the lenght of each edge of a cube that has a volume of 2.57 cm³
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10/17/21

What is the concentration of the HNO3 solution?
A 0.100L  sample of an unknown  solution required 28.5ml of 0.150 for complete neutralization. What is the concentration of the HNO3 solution?
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10/17/21

How many moles of PbI2 are formed from this reaction?
What volume of a 0.510 M NH4I solution is required to react with 981 mL of a 0.680 M Pb(NO3)2 solution? How many moles of PbI2 are formed from this reaction?
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10/17/21

How many grams of the precipitate are formed?
An aqueous solution containing 9.38 of lead(II) nitrate is added to an aqueous solution containing  of potassium chloride. The percent yield for the reaction is 89.2%. How many grams of the... more
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10/16/21

Given the equation N2+ 3 H2-> 2 NH3 ; How many grams of ammonia can be made from 44g of H2?
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10/15/21

Write the balanced chemical equation for the combination (synthesis) reaction of magnesium with oxygen gas. Phases are optional.
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10/15/21

How many moles of aluminium metal are required to make 300 mol of hydrogen gas?
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