A substance composed of two or more elements in a fixed, definite proportion is
1 answer:
A compound
(i think) because it consists of two + elements, whose ratios are shown clearly in the chemical formula, meaning it has a fixed, definite proportion.
hope that helps :)
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1. the amount of heat that it would take would be :
5.1 x 10^4 J
2. I think the substance would be : Iron
3. the amount of heat required would be :
1.13 x 10^4 kJ
Hope this helps
Well red blood cells carry oxygen to muscles
Circulatory system is probably the answer you are looking for.
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optical (optic is the word used for referring to the eye ie optic nerve)
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It increases because the less oxygen the more pressure there will be on that specific object
Explanation:
