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3 years ago

99.9% of the matter that makes up living organisms consist of how many elements

Chemistry

1 answer:

gulaghasi [49]3 years ago

7 0

Answer:

6 elements.

Explanation:

99.9% by weight of most living things is made of the six elements: hydrogen, carbon, nitrogen, oxygen, phosphorus, and sulfur (backwards using just the letter abbreviations this spells SPONCH).

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What does authentic mean?

weqwewe [10]

The definition of authentic is something that is original or true and not a copy of anything else.

<h2>Hope it helps...</h2>

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2 years ago

What is the largest area of a circle that can be made from a piece of thread 25.2cm long assume no knot

Zarrin [17]

Answer:

$50.2 cm^2$

Explanation:

Here we want to find the largest area of a circle that can be made from a piece of thread 25.2 cm long, assume no knot .

This means that the circumference of the circle must equal to the length of the thread, so we can write:

L = 25.2 cm

And the circumference can be written as:

$2\pi r = L = 25.2$

where

r is the radius of the circle

Solving for r, we find the radius:

$r=\frac{L}{2\pi}=\frac{25.2}{2\pi}=4.0 cm$

The area of a circle is given by the formula

$A=\pi r^2$

So in this case, we find:

$A=\pi (4.0)^2=50.2 cm^2$

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4 years ago

What is the solubility of iron in water at 25 degrees Celsius

Hoochie [10]

Fe(No3)2 because Fe(No3)2 is soluble

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3 years ago

What element on the periodic table is named after the european capital where it was discovered in 1923?

vekshin1

i think it would be Hafnium

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3 years ago

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What are the advantages and disadvantages of using an egg to model organelles in an animal c of using an egg to model organelles

aleksandrvk [35]

I think its because an egg doesnt have the right chemical make up

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3 years ago