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eduard
3 years ago
6

What phase of matter is a tree?

Chemistry
2 answers:
Nataliya [291]3 years ago
6 0
Physical state of. Manner
Bas_tet [7]3 years ago
5 0

Like states of matter? A tree is a solid

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How can radioactivity be used to help find the age of an object ?
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Hope this answers your question Mariaduong159

Radiometric Dating. It's used to find the dates of ricks and other objects based on what the known decay rate of radioactive isotopes. Different forms of this method can also estimate the age of natural and man-made materials.

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3 years ago
Calculate the number of molecules in a deep breath of air whose volume is 2.15 L at body temperature, 37 ∘C, and a pressure of 7
Zinaida [17]
PV = nRT 
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First, convert 735 torr to atm. Divide by 760. 
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735 torr * 1 atm / 760 torr = 0.967 atm 
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<span>0.0786 mol * 6.02 * 10^23 molecules / 1 mol = 4.73 * 10^22 molecules </span>
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3 years ago
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