Say you need to make a solution of 1M NaCl for a reaction you are running. How would you know how much salt to weigh out and then add to a given volume of water? To do this, you need to find a way to relate the mass of a compound (salt) to the number of moles of that comp...
To calculate the molecular mass of a compound, you need to know two things. The first is the molecular formula, and the second is the atomic mass number of each of the elements that comprise it. The atomic mass number for each element is listed in atomic mass units under its symbol in...
Now it’s high time to get closer to science. If you’ve been assigned to calculate the molar mass of a certain compound, you can actually use the periodic table as well as the amount of the given compound. Let’s recall the fact that the molar mass of the given compound is the mas...
Themolecular massor molecular weight is the total mass of a compound. It is equal to the sum of the individual atomic masses of each atom in the molecule. It's easy to find themolecular massof a compound with these steps: Determine themolecular formulaof the molecule. Use the periodic tabl...
Calculating Molar Mass of Compounds:To calculate molar mass of compounds, add the masses of the constituent elements multiplied by the number of atoms per molecule. For example, for water with the formula {eq}H_2O {/eq}, add 2 x 1.00 g H/mol H + 1 x 16.00 g ...
To calculate empirical formula of a compound, find the mass of each element present in the compound and convert it to moles, calculate the individual mole ratios and then write out the empirical formula. There are numerous ways in which information regarding the molecular structure and composition...
Concentration is defined as the amount of a substance or compound in a given volume. It is usually found in the unit of Molarity, molality, Normality, ppm or ppb. It is important to know the concentration of your solution since it is a factor in different reactions. Some methods or ...
The molar mass is: 23 + 16 + 1.008 = 40.008 g Thus, the equivalent weight is 40.008g/1 or 40.008 g/equivalent. What is the difference between equivalent weight and molecular weight? Molecular weight is the total atomic mass of a molecule for a compound. Equivalent weight, on the other...
Say, MgO is a compound. In this compound oxygen is 27.6%. If the total compound is 100g, If I want to calculate the moles of oxygen, that would be16g O weigh 1 mole of O So, 27.6g O weighs 1.725 moles of O.Now my second question is that If I want to count the mole of Mg...
Moles to Grams Example Problem Sometimes you're given a value inmolesand need to convert it to grams. To do this, first calculate the molar mass of a sample. Then, multiply it by the number of moles to get an answer in grams: