7. A sample contains 9,000 particles of the original isotope for every 63,000 particles of the daughter isotope. The half-life of the original isotope is 19 years. Find the age of the sample.

Q: What is the median of the values 7.79, 8.24, 5.81, 4.97, 1.04, 7.39, and 7.22?

A: Median value can be calculated as:

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Q: estimate

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A: Since you have asked multiple questions, we will solve the chemistry question for you.

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Q: 4100 I d 3000 2000 NOVEMBER 1500 2000

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Q: the density of silver is 10.5 g/cm what is the density in kg/m3

A: 1 Kg = 103 g 1 g = 10-3 Kg 1 L = 103 mL 1 L = 103 cm3 1 L = 10-3 m3 10-3 m3 = 103 cm3 10-6 m3 = 1…

Q: A quantity of substance that can be seen would be considered the A level.

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Q: a) b) c) d)

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A: Pyridine is a base which can abstract the hydrogen (proton) and form product.

Q: What is the answer in ML?

A: Volume can be converted in mL using conversion factor .

Q: C2H6 + Cl2 C2H5CI + HC

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Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.