05/24/21

What amount of phosmet in grams is required to prepare 450 mL of a 0.100 M solution in water?
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05/20/21

Calculate the delta H for 2C + H2 = C2H2
Given the following data:C2H2 + 5/2 O2 = 2CO2 + H2O delta H= -1300kJC + O2 = CO2 delta H=-394 kJH2 + 1/2 O2 = H2O delta H=-286 kJ
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05/20/21

How many moles of H2O are produced by 2 moles of KOH?
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05/20/21

How many moles of H2O are produced by 2 moles of KOH?
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05/20/21

Helpppppppppppp lol
A 50.00 mL sample of a NaOH solution is titrated with a 1.605 M solution of H2SO4. The titration requires 24.09 mL of the acid solution to reach the equivalence point. What is the molarity of the... more
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05/20/21

Help with chem homework
A H2SO4 solution of unknown molarity is titrated with a 1.209 M NaOH solution. The titration requires 42.27 mL of the NaOH solution to reach the equivalent point with 25.00 mL of the H2SO4... more
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05/20/21

What volume of 4.494 M H2SO4 would be required to react to the equivalence point with 250 mL of a solution containing 7.2280 g of LiOH?
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05/20/21

What volume of 0.12 M HCl is needed to neutralize a solution containing 3.56 g of Mg(OH)2 dissolved in enough water to make a 300 mL solution.?
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05/20/21

What is the molarity of Al(OH)3, if 250.0 mL is exactly neutralized by 125.0 mL of 1.50 M of H2SO4?
What is the molarity of Al(OH)3, if 250.0 mL is exactly neutralized by 125.0 mL of 1.50 M of H2SO4?0.500 M1.00 M2.00 M0.750 M
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05/20/21

Compare a solution with a pH of 13 to a solution with a pH of 4. Which of the following are correct statements about the two solutions?
1. The solution with a pH of 13 has a pOH of 1.0, while the solution with a pH of 4 has a pOH of 10.2. The solution with a pH of 13 has a pOH of 13 while, the solution with a pH of 4 has a pOH of... more
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05/20/21

A student is in the chemistry lab trying to determine the pH of a particular solution. Using the data below and the indicator chart above, what is the pH range of this solution?
zoom_inA student is in the chemistry lab trying to determine the pH of a particular solution. Using the data below and the indicator chart above, what is the pH range of this solution? Colorless in... more
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05/20/21

Compare a solution with a pH of 13 to a solution with a pH of 4. Which of the following are correct statements about the two solutions?
Compare a solution with a pH of 13 to a solution with a pH of 4.Which of the following are correct statements about the two solutions?1. The solution with a pH of 13 has a pOH of 1.0, while the... more
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05/20/21

Which of the following are correct conclusions about the solutions in the diagram?
zoom_inWhich of the following are correct conclusions about the solutions in the diagram?1. Solutions A & D are weak acidic solutions.2. Solutions A & D are strong acidic solutions.3.... more
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05/20/21

If a solution has a [OH-] 1.30 x 10-5 M, what is the pOH and the pH?
If a solution has a [OH-] 1.30 x 10-5 M, what is the pOH and the pH?pOH = 13 pH = 1pOH = 4.89 pH = 9.11pOH = 9.11 pH = 4.89pOH = 1 pH = 13
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05/20/21

CHEMISTRY - THERMOCHEMISTRY
A gas expands against a variable opposing pressure given by P = 10/V atm, where V is the volume of the gas at each stage of expansion. Further, in expanding from 10 to 100 liters, the gas undergoes... more
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05/20/21

Gallium Bed energy creation in a bedroom that’s 16 C.
If two people both 1.5 m tall and similar shape slept under a blanket both without a temperature (37 degrees C) for 8 hours. Would any energy transfer from the bed as, Phase change of the gallium... more
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05/19/21

i neeed help pleaase
6)At 127◦C, the pressure of a sample of nitrogen is 2 atm. What will the pressure be at 274◦C, assuming constant volume? Answer in units of atm.7)The volume of a gas is 11 mL at 43◦C and 0.849 atm.... more
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05/19/21

i need help please
11)A gas occupying 73 mL at standard conditions is heated to 16◦C while the pressure is reduced to 0.8152 atm. What is the new volume occupied by the gas? Answer in units of mL.12)A sample of... more
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05/19/21

Mass of potassium
A patient requires an IV infusion of an isotonic saline solution containing equal molar amounts of potassium chloride and magnesium chloride. In clinical practice, a saline solution is said to be... more
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05/19/21

Mass of potassium
A patient requires an IV infusion of an isotonic saline solution containing equal molar amounts of potassium chloride and magnesium chloride. In clinical practice, a saline solution is said to be... more
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05/19/21

Which is true for a substance that releases energy?
A. The energy release decreases the molecular motion and the kinetic energy of the substance.B. The energy release decreases the molecular motion but increases the kinetic energy of the... more
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05/19/21

10 g H2O = ? g LiOH
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05/18/21

You need to produce 5.00 grams of pure aspirin for a research project. The yield of the reaction is reported to be 80.0% from salicylic acid.

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05/18/21

How do i answer this

How do you thing the energy exchange digram for the combustion of ethane differ from the digram for methane?
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05/18/21

ASAP J.R. potential table is given below.
Answer the following questions regarding the electrochemical cell shown. A portion of the standard reduction potential table is given below.L+ + e- → L     E° = 0.20 VR2+ + 2e- → R   E° = 0.90 VUse... more
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