Give reasons: Arteries have thick walls.
Answers
Answered by
5
Explanation:
In the first experiment:-
Weight of copper oxide, (CuO)=1.288g
Weight of copper =1.03g
Weight of oxygen = Wt. of copper oxide − Wt. of copper =1.288−1.03=0.258g
∴
Wt. of oxygen
Wt. of copper
=
0.258
1.03
≈
1
4
In the second expriment:-
Weight of copper oxide (CuO)=3.672g
Weight of copper =2.938g
Weight of oxygen = Wt. of copper oxide − Wt. of copper =3.672−2.938=0.734g
∴
Wt. of oxygen
Wt. of copper
=
0.734
2.938
≈
1
4
The proportion of elements of copper and oxygen in the reactions is same.
Hence law of constant proportion is proved.
Answered by
7
The heart pumps blood at high pressure. If arteries have thin walls they would burst because of high blood pressure. That is why arteries have thick walls.
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