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makvit [3.9K]
3 years ago
9

Question 2 of 5

Chemistry
2 answers:
alex41 [277]3 years ago
7 0
Precision relates to how close the answers are to each other, so I’d think it would be D because of the limited range between data points.
belka [17]3 years ago
6 0
A Group c 32.1 g 35.0 g 24.0 g
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Iron filings were mixed together with salt crystals. What unique property of iron would be BEST to separate the filings from the
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Iron has magnetic properties, so you would just need to hold a magnet over the mixture and the filings will come right out.
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3 years ago
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Which part of the periodic table contains elements with the greatest metallic properties?
KiRa [710]
The bottom of group 1. Francium (or Fr) is the element with the greatest metallic properties.

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7 0
3 years ago
Using the information in the table, calculate the number of moles in a \pu{7.89 kg}7.89 kg7, point, 89, space, k, g sample of as
Karolina [17]

We have to find the number of moles in a 7.89 kg sample of aspirin.

The formula of aspirin is: C₉H₈O₄

We are given the molar mass of C, H and O:

H: 1.008 g/mol C: 12.01 g/mol O: 16.00 g/mol

Since one molecule of aspirin has 9 atoms of C, 8 atoms of H and 4 atoms of O, and using the molar masses given, we can calculate the molar mass of aspirin:

molar mass of aspirin = 9 * 12.01 g/mol + 8 * 1.008 g/mol + 4 * 16.00 g/mol

molar mass of aspirin = 180.154 g/mol

Before we find the number of moles we can convert 7.89 kg to g. Since we know that there are 1000 g in 1 kg, we can convert it like this:

1000 g = 1 kg

mass of sample = 7.89 kg * 1000 g/1 kg

mass of sample = 7890 g

Finally, we can find the number of moles in the sample using the molar mass.

number of moles = 7890 g * 1 mol/180.154 g

number of moles = 43.795 moles

Answer: The number of moles in the sample is 43.8 moles (using 3 SF)

7 0
1 year ago
Alex is 1.67 meters tall. His
nekit [7.7K]

Answer: A

Explanation:

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3 years ago
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kenny6666 [7]
Answer A )

Potassium chloride

K+   Cl-

hope this helps!.
8 0
3 years ago
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