Assertion: Pure water obtained from different sources such as river, well, spring, sea etc. always
contains hydrogen and oxygen combined in the ratio of 1:8 by mass.
Reason: A chemical compound always contains same elements combined in same fixed proportion by mass
Answers
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Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages.
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Answer:
both are true and r explains a
Explanation:
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