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PolarNik [594]
2 years ago
6

A librarian is interested in the numbers of books that visitors check out from the library. She examines the checkout records of

250
randomly selected adult visitors.
Identify the population and sample for this situation.

A The population is all visitors of the library; the sample is the adult visitors
of the library.
B The population is all adult visitors of the library; the sample is the 250
visitors selected.
C The population is all visitors who check out at least 1 book from the
Library; the sample is the 250 visitors selected.
D The population is the 250 visitors selected; the sample is the 250 visitors
who check out at least 1 book from the library.​
Chemistry
2 answers:
kirill115 [55]2 years ago
8 0

Answer:

The Answer is B.)The population is all adult visitors of the library; the sample is the 250 visitors selected.

Explanation:

The population is the entire group of people or things to be studied. The sample is part of the population.

miss Akunina [59]2 years ago
6 0

Answer:

The answer B

Explanation:

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Convert mass to moles for both reactants. (round to 2 significant figures.)
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Answer:

Explanation:

Given parameters:

Mass of CuCl₂  = 2.50g

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Unknown:

Number of moles of CuCl₂ and Al  = ?

Solution:

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