Recycling!! And also planting more trees.
Hope this helps!
Which of the following processes moves rock materials across the surface of the earth?
C. Erosion
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Answer:
See explanation
Explanation:
If i have a sodium halide salt which can be any of NaCl, NaBr, or NaI, addition of AgNO3 and ammonia leads to the formation of various colour of precipitate which helps to identify the particular halogen atom that is combined with sodium.
If the sodium halide is NaCl, a white precipitate is formed when AgNO3 is added. The precipitate is soluble in ammonia solution.
If the sodium halide is NaBr, a cream precipitate is formed when AgNO3 is added. This precipitate is sparingly soluble in excess ammonia solution.
If the sodium halide is NaI, a yellow precipitate is formed when AgNO3 is added. This precipitate is insoluble in excess ammonia solution
b) The true color of a halogen is only observed when it is viewed in hexane. iodine in hexane has a purple colour. Hence, the reaction that occured is;
NaI(aq) + Cl2 → NaCl(aq) + I2
I just looked it up and I found this:
Polar substances are likely to dissolve in polar solvents
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Answer is: theory.
Theory is a tested,unifying explanation for a set of verified facts.
Theory is a system of explanations that ties together a lot of facts.
Hypothesis is a suggested explanation for an observable phenomenon.
Steps of the scientific method:
1) ask a question about something that is observed.
2) do background research.
3) construct a hypothesis, an attempt to answer questions with an explanation that can be tested.
4) test of hypothesis.
5) analyze collected data and draw a conclusion.