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Trava [24]
3 years ago
11

mary walked north her home to sheila home is 4.0 away then turned right and walked another 3.0 kilometers to the supermarket whi

ch is 5.0 kilometers from her own home she walked the total distance in 15 hours what were her average speed and average velocity
Chemistry
1 answer:
Triss [41]3 years ago
6 0
<span>Her average speed would be the total distance so 7 kilometers divided by the total time or 7/1.5 which would be 4 2/3 km/hr.
 
Her average velocity would be the directed distance of 5 km divided by 1.5 (time) or 3 1/3 km directed 36.87 degrees East of North</span>
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The calculation for such a question can be achieved via Avogadro hypothesis

We know molar mass of CO2 is 44g/mole which is the sum of atomic masses i.e; C and 2 oxygen atoms

Molar mass of CO2 =12(C)+2*16(O) = 44 g/mole will contain 6.023 ※10^23 CO2 molecules ..

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=> 1g = (6.023/44) ※10^23 CO2 molecules

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