06/28/22

N2H4 + 2Fe(OH)2 ------> N2 + 2Fe+ 4 H2O
N2H4 + 2Fe(OH)2 ------> N2 + 2Fe+ 4 H2OIn the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.a)... more
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06/28/22

Oxalic acid dihydrate is a solid, diprotic acid that can be used in the laboratory as a primary standard. Its formula is H2C2O4•2H2O.
Oxalic acid dihydrate is a solid, diprotic acid that can be used in the laboratory as a primary standard. Its formula is H2C2O4•2H2O.A student dissolves 0.851 grams of H2C2O4•2H2O in water and... more
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06/28/22

An aqueous solution of hydrobromic acid is standardized by titration with a 0.173 M solution of potassium hydroxide.
An aqueous solution of hydrobromic acid is standardized by titration with a 0.173 M solution of potassium hydroxide.If 18.9 mL of base are required to neutralize 29.7 mL of the acid, what is the... more
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06/28/22

How many mL of a 0.149 M aqueous solution of sodium sulfate, Na2SO4, must be taken to obtain 5.14 grams of the salt?
How many mL of a 0.149 M aqueous solution of sodium sulfate, Na2SO4, must be taken to obtain 5.14 grams of the salt?
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06/28/22

Gas Laws in Chemistry

Calculate the density (in g/L) of nitrogen dioxide gas at STP: _____________ g/L Then calculate the density at 1.01 atm and 27.6 ˚C.______________ g/L 
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06/28/22

Gas Laws in Chemistry

0.9811 g sample of an unknown gas occupies a 1.436 L glass container at a pressure of 0.540 atm and 29.6 ˚C. What is the molecular weight of the gas?
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06/28/22

Gas Laws in Chemistry

If a 23.1 g sample of nitrogen gas has a volume of 870 mL at 27.2 ˚C, what is its pressure in mm Hg? 
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06/28/22

Gas Lews in Chemistry

What pressure results when 2.65 x 10-3 g of Cl2(g), initially at 21.5 ˚C under a pressure of 645.3 mm Hg in a 0.606 L container, are heated to 26.8 ˚C and the volume is allowed to expand... more
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06/28/22

Help me solve this!
The enthalpy of fusion for aluminum metal is 10.9kJ/mol. How much heat is required to melt 9.75g of solid aluminum metal at its melting point? Report your answer in units of kJ. (Show steps)
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06/28/22

Help me solve this problem?
The enthalpy of vaporization for chlorine is 20.41kJ/mol. How much heat is required to vaporize 223.05g of chlorine liquid at its boiling point? Report your answer in units of kJ. ( show steps)
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06/28/22

Help me solve this problem??
You have prepared a solution by dissolving 16.323g of dextrose (C6H12O6) in 23.50mL of water at 25°C. What is the expected vapor pressure (in units of atm) of this solution? The vapor pressure of... more
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06/27/22

Use that equation to determine the number of liters of oxygen gas that could be produced from 10.0 g of KClO3 at STP. Show your work. 2KClO3---> 2KCl + 3O2
gg/molmolL22.4= L/molmol
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06/27/22

Chemistry 102:Kinetics: Concentration
The rate of decomposition of PH3 was studied at 951.00 °C. The rate constant was found to be 0.0595  s–1.4PH_3 --> P_4 +6H_2If the reaction is begun with an initial Ph_3 concentration of PH_3... more
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06/27/22

What mass of carbon dioxide is produced from the complete combustion of 5.90×10−3 g of methane? Express your answer with the appropriate units.
When methane (CH4CH4) burns, it reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reaction isCH4(g)+O2(g)→CO2(g)+H2O(g)
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06/27/22

What mass of carbon dioxide is produced from the complete combustion of 5.90×10−3 g of methane? Express your answer with the appropriate units.
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06/27/22

How many grams of solute would you use to prepare the following solutions? 1.08 L of 0.438 M glucose (C6H12O6) Express your answer with the appropriate units.
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06/27/22

How many grams of solute would you use to prepare the following solutions? 241.0 mL of 1.11 M NaOH Express your answer with the appropriate units.
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06/27/22

The concentration of cholesterol (C27H46O) in normal blood is approximately 0.005 M. How many grams of cholesterol are in 610 mL of blood?
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06/27/22

1.48 g H2 is allowed to react with 9.97 g N2 , producing 1.81 g NH3 . What is the theoretical yield in grams? What is the percentage yield in grams?
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06/26/22

If 0.123 L of h2o2 are completely decomposed, how many moles of oxygen gas will be produced? The density of hydrogen peroxide is 1.45 g/ml
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06/24/22

Consider the balanced chemical equation for the reaction between nitrogen gas and hydrogen gas to produce ammonia.

A quantity of 24 liters of nitrogen gas, at 25oC and 760 torr, is used in an experiment. What volume of hydrogen gas, at the same temperature and pressure, is needed to react completely with the... more
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06/24/22

Balance the following chemical equations by filling in all blanks.(even if the coefficient is

1) a) ______Bi2S3 + ______HI  ______BiI3 + ______H2S b) ______NaCl + ______Pb(NO3)2  ______NaNO3 + ______PbCl2 d) ______C3H8 + ______O2  ________ +... more
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06/24/22

) A quantity of 10.0 g Iron is reacted with 20.0 g Oxygen gas. Calculate the the amount of Iron(III) oxide that could be made. 4Fe(s) + 3O2(g)  2Fe2O3(s).

when the reaction is finished, 12.7 g of iron oxide is measured. calculate the percent yield
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06/24/22

A quantity of 20.00 g of mercury(II) oxide is decomposed by heating. Calculate the mass of oxygen gas that could be produced. 2HgO(s)  2Hg(l) + O2(g)
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06/24/22

A quantity of 10.0 g Iron is reacted with 20.0 g Oxygen gas. Calculate the the amount of Iron(III) oxide that could be made. 4Fe(s) + 3O2(g)  2Fe2O3(s)
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