Pretty sure it's D. El Nino but not positive.
I believe the compound is Phosphorus pentoxide
Answer:
2n² means 2 × n × n . the power on the n represent the no. of time it is multiplied.
for ex 3x² = 3 × x × x
4x⁴ = 4 × X× X × X× X
(P1V1/T1)=(P2V2/T2)
I just took the test and this should be correct
