What is the percent of oxygen by mass in C2H4O2? (H:1.00 amu, C: 12.01 amu, O:16.00 amu)

Explanation:

Molar mass of all the elements are given in small below the name of that element. Eg. For C, molar mass 12.011 gm etc.

So, molar mass of C2H4O2 = (2× 12.011)+(4×1.008)+(2×15.999) = 60.052 gm

Now molar mass of O present in this molecule= 2×15.999 =31.998 gm

60.052 gm molecule contain 31.998 gm oxygen

So, 100 gm molecule contains (31.998/60.052)×100 gm = 53.28 %

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence