Questions from General Chemistry

Q: Many transition metal salts are hydrates: they contain a fixed number

Many transition metal salts are hydrates: they contain a fixed number of water molecules bound per formula unit of the salt. For example, copper(II) sulfate most commonly exists as the pentahydrate, C...

Q: What volume does a mixture of 14.2 g of He

What volume does a mixture of 14.2 g of He and 21.6 g of H2 occupy at 28 °C and 0.985 atm?

Q: A sample of helium gas occupies a volume of 25.2

A sample of helium gas occupies a volume of 25.2 mL at 95 °C and a pressure of 892 mm Hg. Calculate the volume of the gas at STP.

Q: Consider the following chemical equation: N2(g) +

Consider the following chemical equation: N2(g) + 3H2(g) ( 2NH3(g) What minimum total volume of reactant gases is needed to produce 4.00 g of ammonia if the volume of each gas is measured at 11 °C an...

Q: Gases have (higher/lower) densities than liquids or solids

Gases have (higher/lower) densities than liquids or solids.

Q: On the basis of the electronegativity values given in Fig. 12

On the basis of the electronegativity values given in Fig. 12.3, indicate which is the more polar bond in each of the following pairs. a. O-Cl or O-Br b. N-O or N-F c. P-S or P-O d. H-O or H-N Fr...

Q: The forces that connect two hydrogen atoms to an oxygen atom in

The forces that connect two hydrogen atoms to an oxygen atom in a water molecule are (intermo lecular/intramolecular), but the forces that hold water molecules close together in an ice cube are (inter...

Q: The energy required to melt 1 mole of a solid is called

The energy required to melt 1 mole of a solid is called the .

Q: The following data have been collected for substance X. Construct a

The following data have been collected for substance X. Construct a heating curve for substance X. (The drawing does not need to be absolutely to scale, but it should clearly show relative differences...

Q: The molar heat of fusion of aluminum metal is 10.79

The molar heat of fusion of aluminum metal is 10.79 kJ/mol, whereas its heat of vaporization is 293.4 kJ/mol. a. Why is the heat of fusion of aluminum so much smaller than the heat of vaporization?...