04/10/20

Chemistry 60 Help
Calculate the molarity of 0.300 mol of Na2S in 1.65 L of solution molarity
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04/10/20

Chemistry: moles and mass.
If three (3) grams of solid Zinc (Zn) is mixed with fifty (50) milliliters of Hydrochloric acid (HCl), how much Zinc Chloride (ZnCl2) will be produced in grams?
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04/09/20

What is the relationship between temperature and volume in a redox titration?
I am currently doing an experiment to answer how changing storage temperature of a H2O2 solution affect its concentration, by titration against KMnO4. My results show that when temperature... more
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04/09/20

Fluorine exerts a pressure of 1.3 atm on a piston. When the pressure is changed to 1.4 atm, its volume is 317.7 mL. What was the original volume in mL?

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04/09/20

What is the total pressure in kPa exerted by a mixture containing two gases if the partial pressure of one gas is 34.8 kPa and the partial pressure of the other gas is 74.3 kPa?
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04/09/20

A balloon has 12.1 moles of gas in 97.2 L. If it is reduced to 5.7 moles what is the new volume in liters?
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04/09/20

A 4.98 mole sample of a gas at 4.1 atm is in a 19.8 L container. What is the temperature inside the container?
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04/09/20

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 according to the following reaction? HCl (aq) + NaHCO3 (s) → NaCl (s) + H2O (l) + CO2 (g)
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04/09/20

What is the final chloride ion concentration when 43. g AlCl3 is dissolved in enough water to make 774. mL of solution? The molar mass of AlCl3 is 133.340 g/mol.
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04/09/20

Stock solutions of nitric acid have concentration of 16.0 M. What volume of stock solution is needed to prepare 2.00 L of 2.00 M solution of nitric acid by dilution with water?
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04/09/20

Determine the molarity of a sodium hydroxide aqueous solution that is 91% by mass. The density of the solution is 1.71 g/ml
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04/09/20

Prepare 2L of solution of 60% alcohol from 40% alcohol and 90% alcohol. How many mal will be taken from each strength?

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04/09/20

An experiment requires 0.274 g of hydrobromic acid. Calculate the volume of 0.754 mol/L hydrobromic acid solution that can be used in the experiment.
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04/09/20

What volume of 1.5 M sodium hydroxide solution is required to completely neutralize 250 mL of 4.0 M sulfuric acid?
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04/09/20

How many moles of carbon are needed to produce 45.90 moles of carbon disulfide?
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04/09/20

Write a balanced overall reaction given the unbalanced 1/2 reactions
Na—> Na+Au3+—>AuOverall reaction?
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04/09/20

Separate the redox reaction into its component 1/2 reactions

O2 + 4 Na—>2Na2OHow would you separate into 1/2 oxidation reaction & 1/2 reduction reaction? thank you!
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04/09/20

1.76×10^8 Pa= how many torr
1.76×10^8Pa= how many torr
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04/08/20

how much heat will be released if 2.55 g of hydrogen peroxide H202 decomposes in a bombardler beetle to produce steam spray?
2H2O2 -> 2H2O + O2 DeltaH= -190.0kj
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04/08/20

Arrange these elements according to first ionization energy.
highest to lowest ionization energy LiNBeCBFONe
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04/08/20

Complete and balance the precipitation reaction. Include physical states.
precipitation reaction: CuCl2(aq)+Na2CO3(aq) ------>
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04/08/20

please and thank you
A 2.50 g sample of powdered zinc is added to 100.0 mL of a 2.00 M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/°C . The... more
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04/08/20

chemistry question
If you combine 290.0 mL of water at 25.00 ∘C and 110.0 mL of water at 95.00 ∘C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.Tfinal= ___∘C
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04/08/20

chemistry help please
The specific heat of a certain type of cooking oil is 1.75 J/(g⋅°C). How much heat energy is needed to raise the temperature of 2.23 kg of this oil from 23 °C to 191 °C?q = ___ J
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04/08/20

Chemistry question
Which of the following sugars is predominantly levorotatory? galactose fructose starch sucrose glucose
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