Answered

Get comprehensive answers to your questions with the help of IDNLearn.com's community. Get prompt and accurate answers to your questions from our community of experts who are always ready to help.

What percentage of the total mass of KHCO₃ is made up by nonmetallic elements? 
a. 17% 
b. 83% 
c. 61% 
d. 20% 
e. 50%

Sagot :

Pyromorphiteidn
Mass of K = 39.1g/mole
Mass of H = 1g/mole
Mass of C = 12g/mole
Mass of O = 16g/mole
Mass of KHCO3 = 39.1 + 1 + 12 + 3*16 = 100,1g/mole

100% ------------ 100.1g of KHCO3
x% ----------------- 12g of C
x = 11,99% of C in KHCO3

100% -------------- 100.1 of KHCO3
y% --------------------3*16g of O
y = 47,95% of O in KHCO3

100% ------------- 100.1g of KHCO3
z% ---------------- 1g of H
z = 0,99% of H in KHCO3

11,99% + 47,95% + 0,99% = 60,93% ≈ 61%

answer: C
We value your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. Discover the answers you need at IDNLearn.com. Thank you for visiting, and we hope to see you again for more solutions.