10/29/18

How many grams of oxygen are required to produce 43.0 g of water vapor
How many grams of oxygen are required to produce 43.0 g of water vapor. Please help due tonight! cant seem to figure this equation out!
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10/29/18

If the pressure of 25.0 mL of air is 0.750 atm, what would the pressure be if you increased the volume to 55.0 mL
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10/29/18

4. Analysis of antacid tablets
Tablet mass / g Start Volume/mL Finish Volume/mL Titre/mL 1.30 4.90 21.25 16.35 1.27 21.25 38.60 17.35 From the titration of the antacid tablets, determine the number of moles... more
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10/28/18

Dont know what I'm doing wrong
If 10.0 mL of 0.50 M NaOH is added to 50.0 mL of 0.10 M HCl, what will be the pH?
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10/28/18

PLEASE HELP****************************
Calculate the pH when 20.5 mL of 0.30 M HCl is titrated with 20.0 mL of 0.30 M NaOH
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10/28/18

🔴I NEED HELP ASAPPPPPPP🔴

What are the products of this unbalanced reaction? Na3N (s) → ?
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10/28/18

What is potassium fluoride plus sodium
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10/27/18

Chemistry, unit convertion
While in Europe, if you drive 109 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 28.0 mi/gal ? Assume that... more
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10/27/18

work question please help!
26 grams of N2 is placed in clyinder at 25 degrees celisus and the piston is adjusted so that the gas occupies a volume of 37.6 L. A pressure of 1.8 atm is now applied to the piston and olume... more
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10/27/18

thermochemistry

Determine heat of formation of CCl4g, at 298K, CH4 + Cl2 --> CCl4 + 4HCl reaction's, is -397.3kJCH4= -78.4 kjHCl= -92.3Cl2 = 0I tried to do the sum of the products - reactents = -397.3 but my... more
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10/27/18

molecular formula of a compound is BnH11.the relative molecular mass is 66.find n
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10/27/18

Whats a gram stain
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10/26/18

4 NH3 + 6 NO = 5 N2 + 6 H2O
I don't understand moles and don't know how to ratio this equation. The equation is already balanced. 10 moles of NO react with __________ moles of NH3- 5 moles of NO produce __________ moles of... more
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10/26/18

Copper to Copper Sulfide
How many kilograms of copper are needed to make 100.0 kg of copper sulfide?Cu + S → CuS
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10/26/18

Fe3O4 + 4H2 yields 3Fe + 4H2O, 49grams of Fe3O4 produces 78.25% yield of Fe. How many grams are produced?
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10/26/18

CH3COF + H2O Yields CH3COOH + HF, 28grams of H2O produces a 79.59% yield of HF. How many grams are produced?

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10/26/18

enthalpy change
When 3.02 g of NH4Cl  is dissolved in enough water to make 20.05 mL of solution, the temperature dropped from 19.8°C to 9.1°C. Calculate the enthalpy change (in kJ) when 1 mole of NH4Cl is... more
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10/26/18

3H2(g)+N2(g)→2NH3(g) 1.83 g H2 is allowed to react with 9.84 g N2, producing 3.00 g NH3. What is the theoretical yield in grams for this reaction under the given conditions?
The answer in Value and unit.
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10/26/18

__ N2 + __2 -> __ NH3
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10/26/18

What has a higher electronegativity Rb or Te? Explain (using CER)
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10/26/18

What has a higher ionization energy? Ca or Ba and Ca or Br Explain. (using CER)
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10/26/18

What has a larger atomic radii? Li or Cs and Li or O Explain. (using CER)
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10/26/18

Need Help With solving this Chemistry Questions?
1(a) Fluoroacetic acid, HC2H2FO2, occurs in Gifblaar, one of the most poisonous of all plants: HC2H2FO2(aq) + H2O (l) ------> H3O+(aq) + C2H2FO2–(aq). A 0.50 M solution of fluoroacetic acid has... more
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10/26/18

Need Help With This Chemistry Questions
1(a). The pH of a 0.0060 M solution of butanoic acid, HC4H7O2,is 3.52, but the pH of a 0.0060 M solution of perchloric acid is 2.22. Why is the pH of the butanoic acid solution different from the... more
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10/26/18

If the temperature is 23 in degrees Celsius, what is the temperature in kelvins?
How can you figure what 300 kelvins is to 25 degrees Celsius.
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