Moles are a measure of the number of atoms or molecules in a sample. It can be calculated by dividing the mass of the sample by its molecular weight, which is 1/12 times its atomic weight. In this blog post, we will explore how to use molarity and molality to solve problems that involve moles!
What is the number of moles in a sample? To find out, divide the mass by its molecular weight. Since sulfur’s molecular weight is 32 and 232/32=approximately six, there are approximately six molecules or atoms of sulfur that make up this sample.
How much energy does it take to heat one mole (unit) of water from 273 K to 373 k using an external source with constant power input? The specific heat capacity for water at 20°C is 0.55 J/(g·K).
Answer: 11.0634 joules per mole
How many Joules would be needed if each molecule had a different amount of kinetic energy?
