3 years ago

What does X represent for this transmutation?

Chemistry

1 answer:

Cerrena [4.2K]3 years ago

6 0

Answer:

2 4He

Explanation:

Please see attachment for explanation.

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2 years ago

Which statement describes a chemical property that many elements might share?

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3 years ago

The image shows a piston system where gas is compressed. If the uncompressed system is at a standard pressure of 1 atm, what is

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3 years ago

An aqueous solution containing 16.5 g of an unknown molecular (nonelectrolyte) compound in 106.0 g of water was found to have a

salantis [7]

Answer : The molar mass of unknown compound is 152.38 g/mole

Explanation :

Depression in freezing point = $1.9^oC$

Mass of unknown compound = 16.5 g

Mass of water = 106.0 g

Formula used :

$\Delta T_f=i\times K_f\times m\\\\\Delta T_f=i\times K_f\times\frac{\text{Mass of unknown compound}}{\text{Molar mass of unknown compound}\times \text{Mass of water in Kg}}$

where,

$\Delta T_f$ = depression in freezing point

i = Van't Hoff factor = 1 (for non-electrolyte)

$K_f$ = freezing point constant for water = $1.86^oC/m$

m = molality

Now put all the given values in this formula, we get

$1.9^oC=1\times (1.86^oC/m)\times \frac{16.5g\times 1000}{\text{Molar mass of unknown compound}\times 106.0g}$

$\text{Molar mass of unknown compound}=152.38g/mole$

Therefore, the molar mass of unknown compound is 152.38 g/mole

5 0

2 years ago

Read 2 more answers