Questions from General Chemistry

Q: Calculate the mass in grams of hydrogen present in 2.500

Calculate the mass in grams of hydrogen present in 2.500 g of each of the following compounds. a. benzene, C6H6 b. calcium hydride, CaH2 c. ethyl alcohol, C2H5OH d. serine, C3H7O3N

Q: Which of the following substances exhibit hydrogen bonding interactions? a

Which of the following substances exhibit hydrogen bonding interactions? a. CCl2H2 b. BeF2 c. NO3- d. HCN

Q: What is steel?

What is steel?

Q: Some properties of potassium metal are summarized in the following table:

Some properties of potassium metal are summarized in the following table: Normal melting point…………………….63.5 °C Normal boiling point……………………765.7 °C Molar heat of fusion…………….2.334 kJ/mol Molar heat...

Q: Are changes in state physical or chemical changes for molecular solids?

Are changes in state physical or chemical changes for molecular solids? Why?

Q: Why is there no change in intramolecular forces when a solid is

Why is there no change in intramolecular forces when a solid is melted? Are intramolecular forces stronger or weaker than intermolecular forces?

Q: The molar heat of vaporization of carbon disulfide, CS2, is

The molar heat of vaporization of carbon disulfide, CS2, is 28.4 kJ/mol at its normal boiling point of 46 °C. How much energy (heat) is required to vaporize 1.0 g of CS2 at 46 °C? How much heat is evo...

Q: For each of the following sets of pressure/volume data,

For each of the following sets of pressure/volume data, calculate the new volume of the gas sample after the pressure change is made. Assume that the temperature and the amount of gas remain the same....

Q: Which is stronger, a dipole–dipole attraction between two molecules

Which is stronger, a dipole–dipole attraction between two molecules or a covalent bond between two atoms within the same molecule? Explain.

Q: For a liquid to boil, the intermolecular forces in the liquid

For a liquid to boil, the intermolecular forces in the liquid must be overcome. Based on the types of intermolecular forces present, arrange the expected boiling points of the liquid states of the fol...