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torisob [31]
4 years ago
15

The table shows the number of points scored by the winning men's jumping competition during the Olympics from 1980 to 2000. Afte

r the 2000 Olympics, the mean number of points scored by all winners since 1980 (inclusive) was 241.9. Which of the following choices must have been the winning number of points in 1992?
Chemistry
2 answers:
Neko [114]4 years ago
5 0

the answer is B 222.8

romanna [79]4 years ago
4 0

that would be 241.9 my friend!

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3 years ago
How many moles of NO2 are present in 138.01 g
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Answer:

3.0002 moles

Explanation:

Data Given:

mass of NO₂ = 138.01 g

No. of moles NO₂ = ?

Solution

To find mass of sample mole formula will be used

mole formula

          no. of mole = mass in grams / molar mass

Molar mass of NO₂ = 14 + 2(16)

Molar mass of NO₂ = 14 + 32 = 46 g/mol

Put values in above equation

               no. of mole = 138.01 g / 46 g/mol

               no. of mole = 3.0002 moles

no. of mole of NO₂ = 3.0002 moles

8 0
3 years ago
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