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viva [34]
3 years ago
6

Choose the number of significant figures indicated. 90

Chemistry
2 answers:
Verizon [17]3 years ago
8 0

There are 2 significant figures. Hope this helps :)

kvv77 [185]3 years ago
3 0
There are 2 significant figures. All numbers in a whole number are significant.
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How much faster does helium escape through a porous container than ozone?
otez555 [7]
According to Graham's Law ," the rates of effusion or diffusion of two gases are inversely proportional to the square root of their molecular masses at given pressure and temperature".

                                r₁ / r₂  =  \sqrt{M2 / M1}   ---- (1)

r₁    =  Rate of effusion of He

r₂    =  Rate of Effusion of O₃

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M₂  =  Molecular Mass of O₃  =  48 g/mol

Putting values in eq. 1,

                                r₁ / r₂  =  \sqrt{48 / 4}

                                r₁ / r₂  =  \sqrt{12}

                                r₁ / r₂  =  3.46

Result:
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4 0
3 years ago
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