2 years ago

Please help IM IN HURRY!!!

1 answer:

3 0

1.9000 kilogram/cubic meter
8400 kilogram/cubic meter
19300 kilogram/cubic meter

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Anna35 [415]

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3 years ago

In-s [12.5K]

Molality is defined as 1 mole of a solute in 1 kg of solvent.

Molality=

$\frac{Number of moles of solute}{Mass of solvent in kg}$

Number of moles of solute, n=

$\frac{Given mass of the substance}{Molar mass of the substance}$

Given mass of the nitrobenzene=0.2 g

Molar mass of the substance= 123.06 g mol⁻¹

Number of moles of nitrobenzene,

$n= \frac{0.2 }{123.06}$

Number of moles of nitrobenzene, n= 0.0016 mol

Mass of 10.9 g of naphthalene in kg=0.0109

$Molality= \frac{0.0016}{0.0109 }$

Molality= 0.146 m

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2 years ago

wlad13 [49]

8.4 moles equals 469.14g Fe

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2 years ago

Kaylis [27]

Answer:

I pretty sure it's the pH level 7

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3 years ago

nirvana33 [79]

Try to untie the knot from the balloon let some air out and tie if back....

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2 years ago