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kap26 [50]
3 years ago
11

Listed below are blood groups of o, a, b, and ab of randomly selected blood donors (based on data from the greater new york bloo

d program). o a b o o o o o ab o o o o b o b o a a a o a a b ab a b a a a a o a o o a a o o a o o o o a a a a a ab identify the frequency of the blood group o
Chemistry
2 answers:
Agata [3.3K]3 years ago
8 0

Answer:

Frequency = 22

Relative frequency = 44%

Explanation:

Hello,

To find the frequency of the blood group o, we've just got to count the amount of blood group o donors, thus, the result is 22. On the other hand, if you're required to find the relative frequency, you divide the aforesaid result by the total amount of donors as shown below:

RF=\frac{22}{50}*100%

RF=44%

Best regards.

KIM [24]3 years ago
3 0
The answer to this is 22, confirmed by gradpoint
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2.56 g of hydrogen reacts completely with 20.32 g of oxygen<br> to form X g of water. X = g
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Answer:

Mass of water produced is 22.86 g.

Explanation:

Given data:

Mass of hydrogen = 2.56 g

Mass of oxygen = 20.32 g

Mass of water = ?

Solution:

Chemical equation:

2H₂ + O₂   →  2H₂O

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 20.32 g/ 32 g/mol

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Number of moles of hydrogen:

Number of moles = mass/ molar mass

Number of moles = 2.56 g/ 2 g/mol

Number of moles = 1.28 mol

Now we will compare the moles of water with oxygen and hydrogen.

                    O₂            :            H₂O

                     1              :             2

                  0.635        ;            2×0.635 =  1.27

                   H₂             :              H₂O

                    2              :              2

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The number of  moles of water produced by oxygen are less thus it will be limiting reactant.

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3 years ago
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2 years ago
How many moles are present in
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Answer: (a) There are 0.428 moles present in 12 g of N_{2} molecule.

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Explanation:

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