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Colt1911 [192]
4 years ago
5

I need help on #'s 4 and 5

Chemistry
1 answer:
kompoz [17]4 years ago
3 0
The answer for four is frequency.
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CER sentence starter
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Answer:

CER all starts with a question asked by the teacher. This question is based on a phenomena or lab experience. The student's explanation or answer, as you may have guessed, will consist of three parts: a claim, the evidence, and the student's reasoning. A claim is a statement that answers the question. Start with a hook or attention getting sentence. Briefly summarize the texts • State your claim. Make sure you are restating the prompt. Include a topic sentence that restates your claim and your reason.

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2 years ago
People should be more concerned about the global water budget than the local water budget.
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3 years ago
A 4.94-g sample of an oxide of chromium contains 3.06 g of chromium. Calculate the simplest formula for the compound.
galben [10]

Answer:

CrO2

Explanation:

Firstly, we need to find the mass of the oxygen in the oxide. That is 4.94 - 3.06 = 1.88g

Now, we will need to get the number of moles and this can be obtained by dividing the masses by the atomic mass units. The atomic mass units of chromium and oxygen are 52 and 16 respectively. The division is obtained as follows:

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O = 1.88/16 = 0.12

We then divide by the smallest, which is that of the chromium.

Cr = 0.06/0.06 = 1

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The simplest formula is the empirical formula and it is thus given by CrO2

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4 years ago
(HELP) What were the main themes of the Arab poems?​
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Explanation:

Sorry if its wrong

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Which graph BEST shows the variation of the repulsive force,F, with a distance?
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D is the correct answer

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