3 years ago

Через 100 мл одномолярного раствора гидроксида натрия пропустили 896 мл (н.у.) углекислого

Chemistry

1 answer:

fgiga [73]3 years ago

6 0

Yes it is right sir or ma’am

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Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire.

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how many grams og gas must be relased from a 45.2 L sample of N2 at STP to reduce the volume to 45.0 L at stop

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Suppose that you add 26.7 g of an unknown molecular compound to 0.250 kg of benzene, which has a K f of 5.12 oC/m. With the adde

nadya68 [22]

Answer: The molar mass of the unknown compound is 200 g/mol

Explanation:

Depression in freezing point is given by:

$\Delta T_f=i\times K_f\times m$

$\Delta T_f=2.74^0C$ = Depression in freezing point

i= vant hoff factor = 1 (for molecular compound)

$K_f$ = freezing point constant = $5.12^0C/m$

m= molality

$\Delta T_f=i\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}$

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Molar mass of solute = M g/mol

Mass of solute = 26.7 g

$2.74^0C=1\times 5.12\times \frac{26.7g}{Mg/mol\times 0.250kg}$

$M=200g/mol$

Thus the molar mass of the unknown compound is 200 g/mol

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How many moles of xenon gas are necessary to exert a 0.64atm pressure in an 8.5L container at 300.0K?

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Please answer quick

anastassius [24]

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It will be D

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