How many grams of heptane are needed to completely react with 106 g of O2?

21.9g

Explanation:

The balanced reaction for the combustion of heptane is;

C7H16 + 11 O2 > 7 CO2 + 8 H2O

from the balanced reaction,

1 mole of heptane = 11 moles of O2

converting to mass

100g of Heptane = 484g of O2

xg of Heptane = 106g of O2

x = 106×100/484

x = 21.9g

Therefore, 21.9g of heptane is needed to completely react with 106 g of O2

please don't forget to mark brainliest if helpful

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.