Chemistry Answers

Substance A melts at 2300 °c, and it doesn’t conduct electricity even when molten and doesn't dissolve in water. What is the structure and bonding of this?

What is the vapor pressure of the pure solvent if the vapor pressure of a solution of 10g sucrose (C12H22O11) in 100g of ethanol (C2H5OH) is 55 mmHg?

A solution prepared by adding 10g of an unknown non-volatile, non-electrolyte solute to 100 g of water. The Boiling point of the solution is elevated by 0.433 0C above the normal boiling point of the solvent. What is the molar mass of the unknown substance?

You add 1 kg of ethylene glycol (C2H6O2) antifreeze to 4450g of H2O in your car’s radiator. What would be the freezing point of the solution?

How many grams of Lactic acid (C6H10O5) should be dissolved in 647g of cyclohexane (C6H12) to raise the boiling point to 84.910C? The normal boiling point of cyclohexane is 810C and its molal boiling point is 2.75 0C/m.

The osmotic pressure of 210mL of an aqueous solution containing 0.150g of the enzyme lysozyme is found to be 0.0013atm at 24.850 Calculate the molar mass of lysozyme.

A solution prepared by adding 10g of an unknown non-volatile, non-electrolyte solute to 100 g of water. The Boiling point of the solution is elevated by 0.433 0C above the normal boiling point of the solvent. What is the molar mass of the unknown substance?

for the particle-in-a-box problem in (0, l), the value of (x³) in the n→ ∞ limit would be

What type of bonds form between chloride ion and water mole cules when table salts dissolve in water

What are the empirical and molecular formulas of a compound that is 40.27% potassium, 26.78% chromium, and 32.95% oxygen? The molar mass of the compound is 194.2 g/mol.

2.Determine the concentrations of H+ and OH ions in the blood at alkalosis if its pH is equal to 7.5.

1.Calculate the pH and pOH a solution if the concentration of hydrogen ions is equal to 5.35103 mole/L.

1. If you react 100.0 grams of nitrogen with 100.0 grams of hydrogen, how many grams of ammonia will be produced?

Reaction between solid phosphorous, P4 and oxygen gas, produces P3O5 and 1640.1kJ of heat.