Question

1. choose the best answer.

which of these is the correct formula for diphosphorus pentaoxide?
2p5o
p5o2
po3
p2o5

1. choose the best answer.

which of these is the correct name for sf6?
monosulfur hexafluoride
sulfur fluoride
monosulfur hexafluorine
sulfur hexafluoride

Explanation:

Question 5

Step1: Analyze prefixes in the name

The name "diphosphorus pentaoxide" has "di-" (meaning 2) for phosphorus and "penta-" (meaning 5) for oxygen.

Step2: Write the formula

Phosphorus is represented by P and oxygen by O. So, with 2 P atoms and 5 O atoms, the formula is $P_2O_5$.

Step1: Analyze the formula $SF_6$

S is sulfur and F is fluorine. The subscript 6 for F means "hexa-" (6). For the first element (sulfur) in a binary molecular compound, we don't use a prefix if there's 1 atom. For the second element (fluorine), we use the prefix "hexa-" and change the ending to "-ide".

Step2: Determine the name

So the name is sulfur hexafluoride.

Answer:

D. $P_2O_5$

Question 6