List the elements in a hydrocarbon.
What will be an ideal response?
Question 2
How many significant figures are there in the answer for the following problem? 56.4 + 0.8822 + 21 = ?
A) one
B) two
C) three
D) four
Question 3
Which element has the chemical symbol, S?
A) selenium
B) silicon
C) sulfur
D) scandium