Which element does not contain any neutrons

Type the letter that represents the correct location for each particle type below.

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?