Questions from General Chemistry

Q: The density of osmium (the densest metal) is 22.

The density of osmium (the densest metal) is 22.57 g/cm3. What is the mass of a block of osmium with dimensions 1.84 cm * 3.61 cm * 2.10 cm?

Q: The radius of a neon atom is 69 pm, and its

The radius of a neon atom is 69 pm, and its mass is 3.35 3 10223 g. What is the density of the atom in grams per cubic centimeter (g/cm3)? Assume the atom is a sphere with volume=4/3πr3.

Q: Describe how the process of distillation could be used to separate a

Describe how the process of distillation could be used to separate a solution into its component substances. Give an example.

Q: During a filtration or distillation experiment, we separate a mixture into

During a filtration or distillation experiment, we separate a mixture into its individual components. Do the chemical identities of the components of the mixture change during such a process? Explain....

Q: If powdered elemental zinc and powdered elemental sulfur are poured into a

If powdered elemental zinc and powdered elemental sulfur are poured into a metal beaker and then heated strongly, a very vigorous chemical reaction takes place, and the zinc sulfide...

Q: Students often have trouble relating measurements in the metric system to the

Students often have trouble relating measurements in the metric system to the English system they have grown up with. Give the approximate English system equivalents for each of the following metric s...

Q: Classify each of the following as a(n) element,

Classify each of the following as a(n) element, compound, pure substance, homogeneous mixture, and/or heterogeneous mixture. More than one classification is possible, and not all of them may be used....

Q: If a piece of hard, white blackboard chalk is heated strongly

If a piece of hard, white blackboard chalk is heated strongly in a flame, the mass of the piece of chalk will decrease, and eventually the chalk will crumble into a fine white dust. Does this change s...

Q: has a definite volume but takes the shape of its container

has a definite volume but takes the shape of its container.

Q: During a very cold winter, the temperature may remain below freezing

During a very cold winter, the temperature may remain below freezing for extended periods. However, fallen snow can still disappear, even though it cannot melt. This is possible because a solid can va...