3 years ago

Michael tells Sara he weighs 104 pounds. Sara says she is 44 kilograms. who is heavier?

Chemistry

1 answer:

Flura [38]3 years ago

4 0

Answer: Michael weighs more

Explanation: 44 kilos to pounds is around 97 pounds. hope this helps:)

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Which of the following solutions is more concentrated?<br> 0.50M KCl or 5.0% (w/v) KCl

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.50 M KCl because 5% is the same as .05, which makes the .50M more concentrated.

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When a piece of metal is irradiated with UV radiation (λ = 162 nm), electrons are ejected with a kinetic energy of 3.54×10-19 J.

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We have that the work function of the metal

$\phi=1.227*10^{-18}J$

From the Question we are told that

UV radiation (λ = 162 nm)

Kinetic energy $K.E =3.54*10-19 J.$

Generally the equation for Kinetic energy is mathematically given as

$KE =\frac{hc}{\pi-\phi} \\\\\phi =\frac{ 6.626*10^{-34} * 3*10^8}{162*10^{-9} -3.54*10^{-19}}$

$\phi=1.227*10^{-18}J$

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