2 years ago

Which of these scientists diagnosed smallpox and measles?

Chemistry

1 answer:

kotykmax [81]2 years ago

5 0

......................B. Al-Razi

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compound 1 contains 15.0g of hydrogen and 120.0g oxygen. What is the percent compound of each element?

allsm [11]

Note down the formula below

$\boxed{\sf Mass\%\;of\; element=\dfrac{Mass\:of\:the\: element}{Mass\;of\:the\: compound}\times 100}$

Mass of the compound

$\\ \sf\longmapsto 15+120=135g$

Mass % of Hydrogen:-

$\\ \sf\longmapsto \dfrac{15}{135}\times 100$

$\\ \sf\longmapsto \dfrac{1}{9}\times 100$

$\\ \sf\longmapsto 11.1\%$

Mass % of Oxygen:-

$\\ \sf\longmapsto \dfrac{120}{135}\times 100$

$\\ \sf\longmapsto \dfrac{8}{9}\times 100$

$\\ \sf\longmapsto 88.9\%$

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3 years ago

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yarga [219]

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2 years ago

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Vikki [24]

Answer:

Answer is C because in exothermic reactions, energy releases.

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2 years ago

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Viktor [21]

Answer:

A) wrong. The molar is same so A is hevier

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