A gas initially occupies 25.0 L at 25.0 degrees C and 3.00 atm.

A gas initially occupies 25.0 L at 25.0 degrees C and 3.00 atm. Calculate
its volume after the temperature is increased to 125 degrees C and the pressure is decreased to 1.00 atm. You must show all work to receive credit

Calculate the number of grams of calcium carbonate in the following solutions–you must show all work in detail to receive credit: (a) 25.0 mL of 0.997 M CaCO3, (b) 10.0 mL of 2.50 M CaCO3, (c) 525.0 mL of 0.501 M CaCO3, (d) 1.25 L of 3.42 M CaCO3

Calculate the pH of the following solutions of HNO3. You must show all work in detail to receive credit: (a) 0.24 M, (b) 0.00087 M, (c) 0.25 M, (d) 0.000001 M.

*Calculate the molarity (M) for each of these solutions–you must show all work in detail to receive credit: (a) 31.45 g of NaCl in 1.50 L, (b) 14.41 g of MgS in 0.750 L, (c) 0.4567 g of CuSO4 in 825 mL, (d) 25.5 mg of NaCN in 5.00 mL

 
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Suppose you have 25.00 mL of phosphoric acid,

Suppose you have 25.00 mL of phosphoric acid, and you do not know
what it’s concentration is. If you titrated it with a 0.733 M potassium hydroxide solution, and it took 39.50 mL of the base to neutralize the acid. what was the concentration of the phosphoric acid? Write the neutralization reaction, balance it, name the products THEN Solve the problem above. You must show all work to receive credit.

Write the chemical formula AND the condensed structural formula for each of the following compounds (be sure to show all work and discuss/explain how you reached your answer in order to receive credit): (a) 1-propene, (b) 2-heptene, (c) 2-octyne, (d) 1-pentyne

Each of the following names of compounds has an error in it. Explain (be specific) why the name is incorrect: (a) 3-methylpropane, (b) 2-propylethane, (c) 4-ethylheptane, (d) 2-methylethane

 
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Hydrogen, a possible future fuel mentioned in Problem 115,

Hydrogen, a possible future fuel mentioned in Problem 115,
can also be obtained from ethanol. Ethanol can be made from the fermentation of crops such as corn. How much hydrogen, in grams, could be obtained from 1.0 kg of ethanol (C2H5OH)?

 
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A solution contains an unknown amount of dissolved magnesium.

A solution contains an unknown amount of dissolved magnesium. Addition of 0.0877 mol of Na23
CO causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in the solution?

 
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