Chemistry test

star goldstar goldstar goldstar gold greystar greyFemaleMale
24 Questions - Developed by: Dan - Developed on: - 26.620 taken - User Rating: 3.33 of 5.0 - 12 Votes

Here we go

  • 1
    Chemistry is the study of?
  • 2
    What is the first step in the scientific process?
  • 3
    A scientific hypothesis is a(n) ________
  • 4
    Why do scientists run control experiments and repeat their tests several times?
  • 5
    Which of the following best describes a theory?
  • 6
    Which of the following statements about science is not true?
  • 7
    Which statement best describes Aristotle's belief about matter?
  • 8
    What was the main difference with early chemists such as Boyle and Lavoisier compared to the Greek philosophers?
  • 9
    Which of the following statements best describes the Law of Conservation of Mass?
  • 10
    If you heat 50 grams of wood in the absence of air and produce 10 g of ash, what is the total mass of the products?
  • 11
    You place a piece of shiny aluminum that weighs exactly 1 gram into a container and seal it. The weight of the container and its contents is exactly 10 g. You allow it to sit for a week and then reweigh the container. After one week the weight of the container and its contents is still 10 g. The mass of the sample inside is now 1.5 g. What is the best explanation for this observation?
  • 12
    Which of the following statements best summarizes the Law of Definite Proportions?
  • 13
    Which of the following oxygen: hydrogen mass ratios is the same as the mass ratio found in water (8 g oxygen for every 1 g hydrogen)?
  • 14
    If the mass ratio of lead sulfide (PbS) is 86.6 g of lead (Pb) to 13.4 g of sulfur (S), how much sulfur is needed to completely react 15 g of lead?
  • 15
    The mass ratio of lead sulfide (PbS) is 86.6 g Pb to 13.4 g S. How much product is formed when you react 86.6 g of Pb with 86.6 g of S to form PbS?
  • 16
    Which of the following early chemists initially proposed the concept of an element being composed of a single component?
  • 17
    Which of the following early chemists initially stated and studied the Law of Conservation of Mass?
  • 18
    Which of the following statements from Dalton's atomic theory would best describe the following observation:
    Nine grams of water always contains 8 grams of oxygen and 1 gram of hydrogen?
  • 19
    Which of the following statements from Dalton's atomic theory would best describe the following observation:
    One liter of oxygen gas weighs 32 grams while one liter of hydrogen gas weighs 2 grams?
  • 20
    Which of the following elements is not a diatomic molecule in its natural state?
  • 21
    Which of the following volumes of N2 react with three liters of H2 to form two liters of NH3?
  • 22
    Which of the following scientists would be considered the father of the modern periodic table?
  • 23
    What was the main advantage of arranging the periodic table so that the elements were grouped by chemical properties?
  • 24
    Arrange the following chemical discoveries in chronological order (starting with earliest).
    1. Elements are made of atoms.
    2. Chemicals react in definite whole-number ratios.
    3. Relative masses of atoms can be measured.
    4. The periodic table can be used to predict the properties of the elements.
    5. Mass is conserved in a chemical reaction.

Comments (0)

autorenew