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hichkok12 [17]
3 years ago
11

Which of the following elements, essential to life, is a trace element? Which of the following elements, essential to life, is a

trace element? phosphorus carbon calcium iodine
Chemistry
1 answer:
Vikentia [17]3 years ago
7 0

Answer:

The answer to your question is Iodine

Explanation:

Elements can be classified as:

Basic elements of life: Carbon, Hydrogen, Oxygen and, Nitrogen these elements are in great quantity in the body.

Quantity elements are elements in a medium quantity in the body like Sodium, Magnesium, Potassium, Calcium, Phosphorus, Sulfur and Chlorine.

Trace elements are elements in a low quantity example: Selenium, Iodine, Zinc, Copper, Cobalt, Iron and, Manganese.

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Answer:

Density = mass\ volume

So using this relation we can write volume = mass\density

So volume of uranium = (50.8 \ 18.9 ) cm3

= 2.69 cm3 ( ans)

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What is ΔG° at 298 K for the following equilibrium? Ag+(aq) + 2NH3(aq) Ag(NH3)2+(aq); Kf = 1.7 × 107 at 298 K a. 41 kJ b. 0 c. –
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Answer:

ΔG° = 41.248 KJ/mol (298 K); the correct answer is a) 41 KJ

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