05/07/22

Can someone please answer this
I have an unknown volume of gas held at a temperature of 175 K in a container with a pressure of 42 atm. If by increasing the temperature to 270 K and decreasing the pressure to 29.2 atm causes the... more
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05/07/22

Calculate the amount of heat needed to melt 79.2 g of solid octane and bring it to a temperature of -52.5 C. Be sure your answer has a unit symbol and the correct number of significant digits.
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05/07/22

The enthalpy of vaporization of Substance X is 17.0 kJ/mol and its normal boiling point is 102. C. Calculate the vapor pressure of X at 27. C. Round your answer to 2 significant digits.
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05/07/22

Finding the Rate
A student completed a similar lab experiment and got an εavg of 78 M-1cm-1. If their change in absorbance (∆A) for the first 1.5 minutes was 0.559 and the cuvette was 1.0 cm wide, what was the rate... more
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05/07/22

What are the oxidizing and reducing agent from these chemical reactions? And how many electrons did it gain (oxidizing) and lose (reducing)?
a.) CuO + H2 = Cu + H2Ob.) Zn + Pb(NO3)2 = Pb + Zn(NO3)2
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05/07/22

what mass of hydrogen gas can be produced by reacting 6 moles of aluminum with HCI?
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05/07/22

The enthalpy of vaporization of Substance X is 21.0 kj/mol and its normal boiling point is 19. C Calculate the vapor pressure of X at -98. C Round your answer to 2 significant digits.
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05/07/22

Calculate the amount of heat needed to boil 69.7g of acetic acid, beginning from a temperature of 85.1 C Be sure your answer has a unit symbol and the correct number of significant digits.
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05/06/22

How to find the concentration of original solution

If you used 16 mL of 0.05 M HCl to titrate 20 mL of Ca(OH)2, what is the concentration of hydroxide ions in the original solution?
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05/06/22

What is the pH of a46.21M of a 0.048M hydrobromic acid solution

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05/06/22

What is the pH of a 0.065M lithium hydroxide solution
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05/06/22

Need Help PLZ!!
A 76.0-gram piece of metal at 96.0 °C is placed in 120.0 g of water in a calorimeter at 24.5 °C. The final temperature in the calorimeter is 31.0 °C. Determine the specific heat of the metal. Show... more
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05/06/22

calculate the theoretical yield
calculate the theoretical yield of silver if you started with 115.4g of silver nitrate and unlimited amounts of calcium?
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05/06/22

What amount of heat (in kJ) is required to convert 10.1 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? (specific heat capacity of liquid = 1.58 J/g･°C; specific heat...
What amount of heat (in kJ) is required to convert 10.1 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? (specific heat capacity of liquid = 1.58 J/g･°C; specific heat... more
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05/05/22

Molarity Concentration Classwork
What is the molarity of a solution wih a volume of 2.5L that contsins 5.0 moles of NaOH
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05/05/22

Chemistry (Stoichiomitry)

Under certain conditions the reaction of ammonia with excess oxygen will produce 29.5% yield of NO. If the actual yield of NO is 157g, find the theoretical yield
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05/05/22

How to prepare soln. and buffer soln.

25.0 mL 18 M NaOH solution with 5 g KI and 0.15 g NaN3 250.0 mL 1.0 M NH3-NH4+ pH 10 buffer solution from NH4Cl and NH3 100.0 mL 0.0500 M stock Ca2+ solution
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05/05/22

what is the total volume of nitrogen gas dissolved in their blood when they are at 50.0 m depth?
A SCUBA diver spends an hour working at a depth of 50.0 m where the pressure is 5.00 atm. Their blood gas concentration of nitrogen has time to fully equilibrate so that the concentration of... more
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05/05/22

2 NaN3 (s) — 3 N2 (g) + 2 Na (s) at STP, 50 L of N2 can be formed by what amount of NaN3 in grams
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05/04/22

Theoretical yield

Consider the following chemical reaction:Na2Cr2O7(aq) + BaCl2(aq) = NaCl(aq) + BaCr2O7(s)2.20 g sodium dichromate is mixed with 0.0150 moles barium chloride. Calculatetheoretical vield of barium... more
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05/04/22

You need to make 30 grams of CO2, how many grams of C3H8 are needed?
C3H8 + 5 O2 → 3 CO2 + 4 H2OI just need a little more help trying to understand
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05/04/22

Which of the following would not be expected to increase the rate of a reaction?
A. Increasing in tempB. Increasing in quantity of a reactantC. Increasing the amount of a solid catalyst D. Decreasing the surface area of a solid reactant E. Increasing the surface area of a solid... more
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05/04/22

Is this chemical equation a RedOx reaction?
SO2 + H2O = H2SO3
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05/04/22

What is the oxidizing and reducing agent from this chemical reaction? And how many electrons did it gain (oxidizing) and lose(reducing)?
H2SO4 + Ba(OH)2 = BaSO4 + H2O
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05/04/22

What is the weight of arsenic trioxide (98.25% As2O3) that would be used as a sample so that 29.5 ml of 0.1 N iodine would be needed to titrate it?
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