Introduction to chemistry

Question 1

discuss O2 and O3 (ozone) in terms of structure and properties

Answer 1

different structure and different properties

Question 2

are melting, boiling, etc (phase) changes chemical or physical changes?

Answer 2

physical changes

Question 3

how can sand be separated from salt water?

Answer 3

filtration

Question 4

what 2 things can be substances?

Answer 4

elements and compounds

Question 5

what cannot be chemically separated?

Answer 5

elements (ex: Na or Cl2)

Question 6

discuss compounds and mixtures in terms of ratios

Answer 6

compounds have definite, fixed ratios. mixtures have variable ratios

Question 7

ammonia- what is it and an element or compound?

Answer 7

NH3 compound

Question 8

solutions (Aq) mixture or substance? homogeneous or heterogeneous

Answer 8

homogeneous mixture

Question 9

would 10.0 grams of zinc or copper occupy a smaller volume (use reference table)

Answer 9

copper

Question 10

what does distillation do?

Answer 10

separates a mixture based on different boiling points