Chemistry, 16.10.2020 18:01 krystal408
15. During an investigation, students dropped a tarnished penny into a
solution of acetic acid and sodium chloride. Tiny bubbles formed around
the penny, and the penny was less tarnished after two minutes of soaking
in the acetic acid and sodium chloride solution. The student inferred that a
chemical reaction occurred. What evidence supports the student's
inference? *
The penny experienced a color change, and a gas was produced.
The penny experienced a color change, and a precipitate was formed.
The penny experienced a color change and is in a new state of matter.
The penny experienced a color change and produced light.
O
Answers: 2
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Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?
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Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.
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Chemistry, 22.06.2019 16:00
The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride
Answers: 1
15. During an investigation, students dropped a tarnished penny into a
solution of acetic acid and...
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