05/26/22

13. What is total mass of hydrogen in 2 moles of ethanol? 14. How many atoms of hydrogen are in 5 molecules of ethanol? 15. How many atoms of hydrogen are in 5 moles of ethanol?
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02/25/22

How do you solve this?
Calculate the volume in liters of a 1.2M sodium chloride solution that contains 150.g of sodium chloride NaCl. Round your answer to 2 significant digits.
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02/25/22

How many microliters to add to meet dilution factor criteria for samples?
I am looking for an equation. I have a sample with a dilution factor of 0.8, and another with a dilution factor of 0.6. I need to create a vial of each, with various dilution factors. Each will... more
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02/24/22

Calculate the mass percent of 3.97 g KCl dissolved in 51.1 g H2O.
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02/24/22

Calculate the number of moles of solute in 86.05 mL of 0.1545 M K2Cr2O7(aq).
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02/23/22

For the reaction below, Kc = 1.10 × 10⁻⁴. Note Kc is sometimes called K. What is the equilibrium concentration of C if the reaction begins with 0.200 M A and 0.400 M B? 2 A (aq) + B (aq) ⇌ C (aq)
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02/23/22

If 725.0g of glucose yields 137.8mL of ethanol, what is the percent yield for the reaction?

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02/23/22

How many grams of NaCl should be added to 4.78 kg of water if a 6.48m solution is needed?
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02/21/22

Chemistry Equilibrium
A gaseous mixture of NO2 and N2O4 is in equilibrium. If the concentration of N2O4 is 7.1 x 10^-4M what is the concentration of NO2?2 NO2 = N2O4, Kc= 170Thank you in advance! If you could explain... more
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02/21/22

Fe(NO3)3 + 3NaOH ---> Fe(OH)3 + 3Na(NO)3
a. Given 7.45 mol of Fe(NO3)3 with an excess of 3NaOH, calculate the mol of 3Na(NO)3 that should be formedb. Given 7.45 g of Fe(NO3)3 with an excess of 3NaOH, calculate the mass of 3Na(NO)3 that... more
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02/20/22

The rate constant for this first-order reaction is 0.0442 s−1 at 300 °C.

A⟶products If the initial mass of A is 18.00 g, calculate the mass of A remaining after 0.791 min.Mass of A: ___ g
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02/18/22

How do I write the equilibrium constant expressions for these quantities?
A. N2O4(g) <=> 2NO2(g)B. CO(g) + 3H2(g) <=> CH4(g) + H2O(g)C. 4NH3(g) +5O2(g) <=> 4NO(g) +6H2O(g)D. CH4(g) + 2H2S(g) <=> CS2(g) + 4H2(g)
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12/11/21

Help please....
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12/10/21

How many moles of FeO are needed to produce 1 mole of Fe3O4?
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11/17/21

2C2H6+7O2=4CO2+6H2O how many moles of CO2 will be produced with 2 moles of C6H6
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11/10/21

Chemistry Homework
How many milliliters of a 0.180 M potassium chloride solution should be added to 24.0 mL of a 0.330 M lead(II) nitrate solution to precipitate all of the lead(II) ion?
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