Agroup of organisms which lives together in an area is called a(n): species habitat community environment

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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

What volume of a 0.0606 m solution of strontium bromide is needed to obtain 0.340 mol of the compound? question 42 options: a)5.61 l b) 3.4 l c) 600 ml d) 1 l e) 178 ml