General Chemistry Answers

1. If 35ml of 0.15 M HCl was used to neutralize 25 mL of a calcium hydroxide solution, what was the concentration of the base?

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I. A student calculated the molarity of a solution prepared by dissolving 0.730 mol of table sugar (sucrose, C₁₂H₂₂O₁₁) in 1.8x10^3 mL of water as 4.06x10^-4 M C₁₂H₂₂O₁₁. 

Calcium carbide, CaC2, is an important preliminary chemical for industries producing synthetic fabrics and plastics. CaC2 may be produced by heating calcium oxide with coke: CaO + 3C → CaC2 + CO.

In a reaction, 1.5kg of carbon was reacted with calcium oxide and calcium carbide was produced. calculate the percent yield of calcium carbide.

If 0.00100 moles of hydrogen gas at 155 C exert a pressure of 323 mmHg. What is the volume?

Note: Show process complete solution of calculation

1. Camphor (C10H1602) freezes at 175 °C, and it has a particularly large freezingpoint-depression constant, K = 40.0 °C/m. When 0.086 g of an organic substance of unknown molar mass is dissolved in 22.01 g of liquid camphor, the freezing point of the mixture is found to be 1.7 °C below of pure camphor. What is the molar mass of the solute?

2. You add 0.25 g of an unknown solute to 11.1 g of benzene. The boiling point of the benzene rises from 80.10 °C to 80.46 °C. What is the molar mass of the compound? Ko=2.53 °C /m 3. A solution of an unknown non-dissociating solute was prepared by dissolving 0.300 g of the substance in 40.0 g of CC14. The boiling point of the solution was 0.357 °C higher than that of the pure solvent. Calculate the molar mass of the solute. Ko=5.02 C/m

Note: Show process complete solution of calculation

The chloride in the sample is to be determined gravimetrically by precipitating and weighing AgCl. What weight

in grams of sample should be taken so that the percentage of Cl is obtained by simply multiplying the weight of

the AgCl precipitate by 10?

 A 1.000 g sample of an aluminum is dissolved and the sulfate precipitated as BaSO4. The precipitate weighed 

0.3486 g after it was washed and ignited. Assuming all the sulfate and aluminum in the sample were in the form 

of K2Al2(SO4)3 • 24 H2O, calculate the percentage of Al2O3 in the sample.

what is the mg amount of the 10 ml chlorpromazine (drug) 1N ?

1.00 M NaOH and mystery HBr of ph balance 7

1. Camphor (C10H1602) freezes at 175 °C, and it has a particularly large freezingpoint-depression constant, K = 40.0 °C/m. When 0.086 g of an organic substance of unknown molar mass is dissolved in 22.01 g of liquid camphor, the freezing point of the mixture is found to be 1.7 °C below of pure camphor. What is the molar mass of the solute?

2. You add 0.25 g of an unknown solute to 11.1 g of benzene. The boiling point of the benzene rises from 80.10 °C to 80.46 °C. What is the molar mass of the compound? Ko=2.53 °C /m 3. A solution of an unknown non-dissociating solute was prepared by dissolving 0.300 g of the substance in 40.0 g of CC14. The boiling point of the solution was 0.357 °C higher than that of the pure solvent. Calculate the molar mass of the solute. Ko=5.02 C/m

Provide the process complete solution...