how do you solve the mass in mg of 19 representative particle step by step?
To solve for the mass in milligrams (mg) of 19 representative particles, you need to know the molar mass of the substance. The molar mass represents the mass in grams of one mole of a substance. Here are the steps to calculate the mass in mg:
Step 1: Identify the substance and determine its molar mass using the periodic table. For example, let's consider water (H2O). The molar mass of water is calculated by adding the atomic masses of its constituent atoms, which are 2 hydrogen (H) and 1 oxygen (O) atom.
Step 2: Calculate the molar mass of the substance using the atomic masses. In the case of water, the atomic mass of hydrogen is approximately 1 g/mol, and the atomic mass of oxygen is around 16 g/mol.
Molar mass of water (H2O) = (2 * atomic mass of hydrogen) + (1 * atomic mass of oxygen) = (2 * 1 g/mol) + (1 * 16 g/mol) = 18 g/mol
Step 3: Convert the molar mass from grams (g) to milligrams (mg) by multiplying it by 1000 since there are 1000 milligrams in one gram.
Molar mass of water in milligrams = 18 g/mol * 1000 mg/g = 18000 mg/mol
Step 4: Calculate the mass of 19 representative particles in milligrams using the molar mass calculated above. One mole of any substance contains 6.022 x 10^23 particles, which is called Avogadro's number.
Mass in mg of 19 representative particles = (19 / Avogadro's number) * molar mass in mg/mol
For water:
Mass in mg of 19 molecules of water = (19 / 6.022 x 10^23) * 18000 mg/mol
By plugging in the values into the equation and performing the calculations, you will get the final answer for the mass in milligrams of 19 representative particles of water.