How many moles would you need to have 7.85 x 10^22 molecules of ammonia (NH3).

0.130 moles NH₃

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 7.85 × 10²² molecules NH₃

[Solve] moles NH₃

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.130355 moles NH₃ ≈ 0.130 moles NH₃

i'm pretty sure its b i might be wrong though!

elements make up everything, and they combine to make compounds.

the answer is c