"Tengo un peine en mi mochila, pero mi mochila está en mi casa."

Translation: I have a comb in my backpack, but my backpack is at my house.

[LeeCalvert]

They accept backpack but not pack. Check the Larousse spanish dictionary and they define: pack, rucksack, knapsack. They do not use the word bag. I think Duolingo should not confuse bag and pack.

[Iago]

I've never heard "pack" used as a noun on its own, only as a verb. Backpacks, rucksacks and knapsacks are frequently referred to as "bags" where I live. Backpack is perhaps the most common though.

I've never heard of "packsack" before though :þ

[Daniel-in-BC]

I was happy that DL accepts "está en mi casa" = " is at home"

[banjostevens]

First world problems

[AlexCopeland1]

"I have a comb in my rucksack, but my backpack is in my house."
Apparently this is correct, but using the word rucksack twice is wrong.

[mexicanfoodfreak]

You should report this because it is clearly inconsistent to accept "rucksack" as a translation of "mochila" only once in the same sentence.

[floffybis]

however could be used instead of but