Progress through this unit of study we will add to your understanding of this type of change.
For each of the numbered scenarios below, watch the video linked and answer the questions
that follow.
1. The reaction of iron and sulfur.
a. Watch the Iron and sulfur video
b. In the video you can observe iron reacting with sulfur to form a new substance,
iron (II)sulfide. Using our classification language, how would you describe iron,
sulfur and iron sulfide. In other words, what type of substance are each of these?
i. Iron:
ii. Sulfur:
iii. Iron (II) sulfide:
c. In the space below draw a formula unit for each of the substances
Iron
sulfur
iron (II) sulfide
Answers: 2
Chemistry, 22.06.2019 06:30, rosieposie27
(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.
Answers: 1
Chemistry, 22.06.2019 10:00, zionlopez543
Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.
Answers: 1
Chemistry, 22.06.2019 10:30, tjjjjjjjjjjjjjjjjjjj
What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature
Answers: 1
Chemistry, 23.06.2019 08:00, 91miketaylor
Why is it important for scientists to review and repeat the work of other scientists? 1.a scientific theory must be tested three times before it is proven. 2.the scientific method only applies to repeated experiments. 3.an experiment may have had errors that the scientists didn't recognize. 4.the results of individual scientists may be influenced by bias. 5.an experiment must be performed twice before the data can be analyzed.
Answers: 3
Progress through this unit of study we will add to your understanding of this type of change.
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