2 years ago

Potassium impart purple colour but beryllium do not impart any colour to the flame.Why?

1 answer:

6 0

Answer:

<h2>The electrons in beryllium and magnesium are too strongly bound to get excited by flame. Hence, these elements do not impart any color.</h2>

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2 years ago

Dmitrij [34]

Answer:

<h2>127.57 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{7.68 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 127.574750...$

We have the final answer as

<h3>127.57 moles</h3>

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2 years ago

marusya05 [52]

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3 years ago

Potassium impart purple colour but beryllium do not impart any colour to the flame.Why?​