Question

practice unit 3 - spring 2026
question 25 (0.25 points)
listen
what is the correct formula for the compound with the name:
disulfur decafluoride
a) $\ce{na_{10}f_{2}}$
b) $\ce{na_{10}f_{2}}$
c) $\ce{si_{2}f_{10}}$
d) $\ce{s_{10}f_{2}}$
e) $\ce{s_{2}f_{10}}$
f) $\ce{na_{2}f_{10}}$

Explanation:

1. Use prefixes to find element counts:

• "di-" means 2, so there are 2 sulfur (S) atoms.
• "deca-" means 10, so there are 10 fluorine (F) atoms.

1. Combine the elements with their counts in the order given by the name (sulfur first, then fluorine).

Answer:

e) $S_2F_{10}$