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Furkat [3]
3 years ago
7

Which statements about acceleration are true?

Chemistry
1 answer:
steposvetlana [31]3 years ago
8 0

Answer:  B is True: Acceleration is a vector quantity, so that means it should have both magnitude and direction.

Explanation:

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How many moles of oxygen gas (O2) are in a 2.50 L container at standard temperature and pressure?
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Hey there!:

1 mole O2 ----------------- 22.4 L  ( at STP )

( moles O2 ) -------------- 2.50 L

moles O2  = 2.50 * 1 / 22.4

moles O2 = 2.50 / 22.4

moles O2 =  1.12*10⁻¹


Answer B


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Vinegars can be 5-20% acetic acid solutions and has been used for medicinal purposes for thousands of years. If a person takes 3
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3 years ago
One mole of carbon (12.0 g) in the form of crystalline graphite is burned at 25◦C and 1.000 atm pressure to form CO2(g). All of
iogann1982 [59]

Answer:

T₂ = 43.46 °C  

Explanation:

Given that:

The heat of the formation of carbon dioxide = - 393.5 kJ/mol (Negative sign suggests heat loss)

It means that energy released when 1 mole of carbon undergoes combustion = 393.5 kJ = 393500 J

Heat gain by water = Heat lost by the reaction

Thus,    

m_{water}\times C_{water}\times \Delta T=Q

For water:  

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T₂ = 43.46 °C  

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