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son4ous [18]
4 years ago
11

Rubidium has two naturally occurring isotopes, rubidium -85 ( atomic mass = 84.9118 amu; abundance = 72.15%) and rubidium -87 (a

tomic mass = 86.9092; abundance = 27.85%). Calculate the atomic weight of rubidium
Chemistry
1 answer:
son4ous [18]4 years ago
6 0

Answer:

The answer to your question is: 85.458 amu

Explanation:

data

Rubidium-85   A = 84.9118 amu   abundance = 72.15%  

Rubidium - 87  A = 86.9092 amu abundance = 27.85%

Atomic weight = ?

Atomic weight = 84.9118(0.7215) + 86.9092(0.2785)

Atomic weight = 61.2538 + 24.2042

Atomic weight = 85.458 amu

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3 years ago
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Osmium is the most dense element we know of. A 22 g sample of Osmium has a volume of 100 cL. Calculate the density of Osmium in
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Answer:

a. V = 1000 mL

b. Denisty = 0.022 g/mL

Explanation:

a.

First we need to convert the volume of the Osmium into mL. For that purpose we are given the conversion unit as:

1 mL = 0.1 cL

Hence, the given volume of Osmium will be:

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b.

The density of Osmium is given by the following formula:

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3 years ago
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Novay_Z [31]

Answer:

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3 years ago
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A solution has a higher boiling point than its associated pure solvent does.
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En una estructura de concreto cuyo peso es de 8500 n se apoyo sobre un area de 25cm2,hallar la presion ejercida sobre su base
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Respuesta:

340 N/cm²

Explicación:

Paso 1: Información provista

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Area superficial (A): 25 cm²

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