What is the Mr of an ammonia molecule (NH3)? Round your answer to the nearest whole number.

Final answer: The Mr of an ammonia (NH3) molecule is 17. Explanation: The molecular weight or Mr of an ammonia molecule (NH3) is calculated by adding up the atomic masses of all the atoms in the molecule. In this case, nitrogen (N) has an atomic mass of 14.01 amu, and each hydrogen (H) atom has an atomic mass of 1.01 amu. So, to find the Mr of NH3, we add: 14.01 amu + (1.01 amu x 3) = 17.04 amu. When rounded to the nearest whole number, the Mr of NH3 is 17. Learn more about Molecular weight of an ammonia molecule here: brainly.com/question/13154566