Câu hỏi
What is the empirical formula for a molecule containing 86% C and 14% H? CH_(2) CH_(8) C_(3)H_(7) C_(7)H_(16)
Giải pháp
4.1
(212 Votes)
James Whitaker
Master · Tutor for 5 years
Answer
A.
Explanation
1. Assume 100 g Sample and Convert Percentages to Grams Assume a
sample so that the mass of each element equals its percentage:
C and
H.2. Convert Masses to Moles Calculate moles using atomic masses: - For C:
- For H:
3. Find Simplest Whole Number Ratio Divide both mole values by the smallest number (
):- C:
- H:
So, the ratio is
for C:H.4. Write Empirical Formula The empirical formula is
.