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3 years ago

What is the mass of 8.98 x 10^24 particles of CaCl2?

Chemistry

1 answer:

vladimir1956 [14]3 years ago

8 0

Answer:

1656.12grams

Explanation:

To calculate the mass of a substance in a particle, we need to calculate the number of moles (n).

n = nA × 6.02 × 10^23

nA = 8.98 x 10^24 particles

number of moles = 8.98 x 10^24 ÷ 6.02 × 10^23

n = 8.98/6.02 × 10^ (24 - 23)

n = 1.492 × 10^1

n = 14.92moles of CaCl2

Molar Mass of CaCl2 where Ca = 40g/mol, Cl = 35.5g/mol

CaCl2 = 40 + 35.5(2)

= 40 + 71

= 111g/mol

Using mole = mass/molar mass

mass = molar mass × mole

mass = 111 × 14.92

mass = 1656.12grams.

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3 years ago

What is newtons 2nd law of motion

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4 years ago

A molecule is known to have a molar absorptivity of 18,650 at a certain wavelength. A spectrometer is tuned to this wavelength a

iren2701 [21]

Answer:

17,932.69 g/mol is the molecular weight of the substance.

Explanation:

Using Beer-Lambert's law :

Formula used :

$A=\epsilon \times c\times l$

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c = concentration of solution =?

l = length of the cell = 1 cm

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Now put all the given values in the above formula, we get the molar absorptivity of this solution.

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Molecular weight of the substance = x

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3 years ago

For each of the esters provided, identify the alcohol and the carboxylic acid that reacted.

Veronika [31]

Answer:

52. The alcohol USED => methanol, CH3OH

The carboxylic acid USED => propanoic acid, CH3CH2COOH.

53. The alcohol USED => Ethanol, CH2CH3OH

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Explanation:

52. To obtain Methyl propanoate, CH3CH2COOCH3, we simply react propanoic, CH3CH2COOH and methanol, CH3OH together as shown below:

CH3CH2COOH + CH3OH —> CH3CH2COOCH3 + H2O

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The carboxylic acid used: propanoic acid, CH3CH2COOH.

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HCOOH + CH3CH2OH —> HCOOCH2CH3 + H2O

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3 years ago

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Helga [31]

Answer:

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3 years ago