First, convert the grams to moles using the molar mass and then use Avogadro's number to find the number of molecules: \(\mathrm{2g\enspace NaCl\Biggl(\dfrac{1mol\enspace NaCl}{58.44g\enspace NaCl}\Biggr)\Biggl(\dfrac{6.022\times10^{23}\enspace molecules\enspace NaCl}{1mol}\Big...
Chemistry is full of many different confusing conversions. These conversions are important because they ultimately allow us to discover how a particular atom or molecule will interact with other atoms and molecules. Central to chemical conversions is the conversion of grams to moles, and vice versa....
Grams and moles are two ways to express mass.Tomasz Sienicki, Creative Commons Many chemical calculations require the number of moles of a material, but how do you measure a mole? One common way is to measure themass in gramsand convert to moles.Converting grams to molesis easy with these ...
Concept of Moles A mole (abbreviated to mol) is a very large number used to measure units (atoms, electrons, ions or molecules), which is equal to 6.022 x 10^23 (the same number of particles as there are atoms in 12 grams of carbon-12). This is known as Avogadro's number or the...
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:
atmosphere. This process actually helps scientists track how Mars is gradually losing its water to space, as the hydrogen involved comes from water molecules broken apart by sunlight. However, because both types of the planet's auroras are made of ultraviolet light, they are invisible to the ...
If a physician prescribed 4 g of aspirin to be taken daily, how many 5-grain tablets should the patient take each day? (How many grains are in a gram?) How many particles are in a mole? If you have 3 moles of O_2, how many O_2 molecules do you have? How to convert kg to ...
How many moles of chloroethylene (C_2H_3Cl) contain 5.47 \times 10^{26} molecules? How do you solve the following problem? Nick is 6 ft ft tall. He walks around the world. Assuming that the diameter of earth is 7915 miles, how much further does Nick's head travel than his feet?
Chemists routinely perform calculations of the amount of substances necessary to carry out a chemical reaction. Textbooks refer to this topic as "stoichiometry." Chemists base all stoichiometric calculations on moles. A mole represents 6.022 x 10^23 for
The mole fraction of a solute is the ratio of the number of moles of that solute to the total number of moles of solute and solvent in solution. Because it's a ratio of moles to moles, the mole fraction is a dimensionless number, and of course, it's always less than one. Molar ...