10 moles of water molecules = 10 × (6.022 × 10 23) = 6.022 × 10 24 water molecules The mathematical equation, N = n × N A , can also be used to find the number of atoms of each element in a known amount (in moles) of a compound.How to Convert MOLECULES to MOLES | Chemistry with CatConverting molecules to moles, all you need is Avogadro's Number! It is so important to know the moles ...The representative particles can be atoms, molecules, or formula units of ionic compounds. This relationship is frequently used in the laboratory. The simplest type of manipulation using molar mass as a conversion factor is a mole-mass conversion (or its reverse, a mass-mole conversion). ... By the same token, the ratios we constructed to …How many acetone, CH 3 COCH 3, molecules are in a 0.89 mole sample? 8. What is the mass of 100 billion billion (100 x 10 9 x 10 9) water molecules? This page viewed . This page titled Molecules and Moles (Worksheet) is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Mark Draganjac via source content that …Excel Theorems Molecules To Moles Calculator Molecules are converted to moles and vice versa using the Avagadro's number. The Avogadro's number is a dimensionless …Molar mass of a substance is the mass in grams of one mole of the compound. In a substance, the amount of entities present e.g. atoms, molecules, ions, is defined as a mole. A mole of any substance is 6.022×1023 molecules. Just as we take a standard value to calculate different things e.g. 1 dozen =12 items similarly we use the mole to ...Number of Moles: The quantity of the substance measured in moles. Avogadro’s Number: Approximately 6.022 × 10^23, representing the number of molecules or atoms in one mole of a substance. For example, if you have 2 moles of a substance, the number of molecules would be: Number of Molecules = 2 moles * 6.022 × 10^23 = 1.2044 × 10^24 molecules. mole-mass calculation. , where we start with a given number of moles of a substance and calculate the mass of another substance involved in the chemical equation, or vice versa. For example, suppose we have the balanced chemical equation: 2Al + 3Cl 2 → 2AlCl 3. Suppose we know we have 123.2 g of Cl 2.The conversion between the molecules and moles is done by using the Avogadro’s number as below: For converting moles to molecules, multiply \(6.02214076 * 10^{23}\) by the number of moles; For converting molecules to moles, divide the number of molecules by \(6.02214076 * 10^{23}\) How Many Atoms In A Mole? Converting Molecules to Moles. When converting molecules to moles remember that one mole = 6.02 X 10^23 molecules. So, you are given molecules and want to ... Excel Theorems Molecules To Moles Calculator Molecules are converted to moles and vice versa using the Avagadro's number. The Avogadro's number is a dimensionless …One mole of any substance is equal to the Avogadro number. This number as value \(6.023 \times 10^{23}\). It is useful to measure the products in any chemical reaction. Thus \(6.023 \times 10^{23}\) of atoms, molecules or particles are 1 mol of atoms, molecules or particles. The formula for Number of MolesConversion Between Moles and Atoms, Molecules and Ions. Using our unit conversion techniques learned in Chapter 1, we can use the mole relationship and the chemical formula to convert back and forth between the moles and the number of chemical entities (atoms, molecules or ions). Because 1 N 2 molecule contains 2 N atoms, 1 mol …Number of Molecules = 2.1063 ∗ 10 24. Now we have to perform moles to grams calculation: Molar Mass = 107.868. (for calculations, tap Molar Mass Calculator) By using moles to grams formula: m = n ∗ M. m = 38.99 ∗ 107.868. m = 4205.77332 g. You can also verify the results by fetching the values in our free moles to grams calculator. Chemists use the term mole to represent a large number of atoms or molecules. Just as a dozen implies 12 things, a mole (abbreviated as mol ) represents 6.022 × 10 23 things . The number 6.022 × 10 23 , called Avogadro’s number after the 19th-century chemist Amedeo Avogadro, is the number we use in chemistry to represent macroscopic amounts ... Converting Molecules to Moles. When converting molecules to moles remember that one mole = 6.02 X 10^23 molecules. So, you are given molecules and want to ...Mole to Mass Conversions. We have established that a balanced chemical equation is balanced in terms of moles, as well as atoms or molecules. We have used balanced equations to set up ratios, in terms of moles of materials, that we can use as conversion factors to answer stoichiometric questions—such as how many moles of substance A …Use the periodic table to find the substance's molar mass when making conversions between grams to moles and moles to grams. To convert grams to moles, multiply the number of grams by 1 mole/molar ...Learn how to use the mole as a unit of measure to convert between mass and number of particles of a substance. The mole is equal to 6.022 × 10²³ units of that substance, such as …Similar to atoms, 1 mole of any compound contains the same number of molecules as 1 mole of any other compund. The masses of 1 mole of different compunds, however, are different, since the masses of the individual molecules are drastically different. The molar mass of a compound is the mass in grams of 1 mole of that substance, a property …It is equal to the relative atomic mass expressed in grams. We can easily arrive at the following important relationships. 1. 1 mole of atom of an element. = number of atoms in 1 gram-atom of the element. = 6.022 x 1023 atoms. 2. (a) The absolute mass of 1 atoms of an element. =. =.A mole (mol) is the amount of a substance that contains 6.02 × 10 23 representative particles of that substance. The mole is the SI unit for amount of a substance. Just like the dozen and the gross, it is a name that stands for a number. There are therefore 6.02 × 10 23 water molecules in a mole of water molecules. Step 2: Multiply the number of moles by the Molar Mass of the substance to determine the grams. Step 3: Through correct Dimensional Analysis, the molecules and moles will cancel to leave grams. \[\dfrac{molecules}{Avogadro's}\rightarrow moles\rightarrow moles \cdot MM\rightarrow grams\] Helpful Hints: Avogadro's number: 6.022 x 10 23 mol of a ...We can use these ratios to determine what amount of a substance, in moles, will react with or produce a given number of moles of a different substance. The study of …May 16, 2022 · The mole definition according to the latest conventions (effective 20 May 2019) is that a mole refers to the number of chemical substances that contain 6.2214076 x 10^23 parts, such as atoms and molecules. This number is known by Avogadro’s constant. It is represented by NA (or L). The molar mass is the mass of a mole of a substance, which corresponds to the quantity of matter that contains an Avogadro's number of atoms or molecules (depending on the substance). Molar masses change widely in the periodic table: a mole of hydrogen weighs only 1.008 g , while a mole of uranium weighs 238.03 g .To learn more about Atoms and Molecules, enroll in our full course now: https://infinitylearn.com/microcourses?utm_source=youtube&utm_medium=Soical&utm_camp...Underwater tunnels, like the Marmaray, rely on some extreme construction techniques. Learn more about underwater tunnels at HowStuffWorks. Advertisement Contrary to what super vill...Make new podcast friends. But don't forget to keep the old. New podcasts are popping up so fast, it’s easy to feel like you’re playing a game of Whack-a-Mole with your download que...Learn how to convert molecules to moles using Avogadro's number (6. 02 x 10^23) with examples and steps. Find out the number of moles present in water, phenol, …Oct 24, 2019 ... To convert molecules to grams, we must first convert the number of molecules to moles and then convert the number of moles to grams.Make new podcast friends. But don't forget to keep the old. New podcasts are popping up so fast, it’s easy to feel like you’re playing a game of Whack-a-Mole with your download que...May 11, 2023 · One mole of glycine, C 2 H 5 O 2 N, contains 2 moles of carbon, 5 moles of hydrogen, 2 moles of oxygen, and 1 mole of nitrogen: The provided mass of glycine (~28 g) is a bit more than one-third the molar mass (~75 g/mol), so we would expect the computed result to be a bit greater than one-third of a mole (~0.33 mol). That is, the molar mass of a substance is the mass (in grams per mole) of 6.022 × 10 23 atoms, molecules, or formula units of that substance. In each case, the number of grams in 1 mol is the same as the number of atomic mass units that describe the atomic mass, the molecular mass, or the formula mass, respectively.Divide the mass of the molecular substance by its molar mass to get moles. Then multiply times (6.022xx10^23"molecules")/(1"mol"). Determine the mass of the substance, and its molar mass. Divide the given mass by its molar mass to get moles, then multiply times (6.022xx10^23"molecules")/(1"mol").Oct 17, 2021 ... A mol or mole is a "standard unit (6.02214076 x 10^23) in chemistry for measuring large quantities of very small entities such as atoms or other ...3 days ago · For moles, the unit is simply moles. The number of atoms is just a number; therefore, it is dimensionless, i.e., it does not have any units. Rearrange the formula to find Avogadro's constant: number of atoms / moles = Avogadro's number; So, on the left-hand side, we have no units / moles, which can be expressed as mol-1. We can use the rearranged molarity equation to calculate the moles of NaCl needed for the specified concentration and volume: mol NaCl = [ NaCl] × L of solution = 0.800 mol L × 0.250 L = 0.200 mol NaCl. We can then use the molecular weight of sodium chloride, 58.44 g mol , to convert from moles to grams of NaCl :The number of molecules in one mole is called Avogadro’s number (\(N_A\)) and the value of Avogadro’s number is now known to be \[N_A = 6.02 \times 10^{-23} \, mol^{-1}\]. We can now write \(N = N_An\), where n represents the number of moles of a substance. Avogadro’s number relates the mass of an amount of substance in grams to …The number of molecules in 16 grams of oxygen gas is 3.01*10^23, equal to half of Avogadro’s number. One mole of oxygen gas is approximately 32 grams. Sixteen grams of oxygen gas i...From volume (liters) to moles: Divide your initial volume by the molar volume constant, 22.4 L. From moles to volume (liters): Multiply your mole value by the molar volume constant, 22.4L. From particles (atoms, molecules, or formula units) to moles: Divide your particle value by Avogadro’s number, 6.02 × 10 23.The first conversion factor converts from moles of particles to the number of particles. The second conversion factor reflects the number of atoms contained within each molecule. Figure 4.2.2 4.2. 2: Two water molecules contain 4 hydrogen atoms and 2 oxygen atoms. A mole of water molecules contains 2 moles of hydrogen atoms and 1 …Learn how to convert the number of moles to number of molecules. When converting from moles to molecules we'll multiply the number given for moles by Avogad... The mole is the "counting unit" used by chemists to indicate the number of atoms, ions, molecules, or formula units present in a particular chemical sample.The answer is 6.0221415E+26. We assume you are converting between molecule and kilomole . You can view more details on each measurement unit: molecules or kmol The SI base unit for amount of substance is the mole. 1 mole is equal to 6.0221415E+23 molecules, or 0.001 kmol. Note that rounding errors may occur, so always check the …Apr 10, 2023 · The formula used by the moles to molecules calculator is: Molecules = Moles * 6.02214076 * 10^23. The number 6.02214076 * 10^23 is known as Avogadro’s number and represents the number of particles in one mole of a substance. By multiplying the number of moles by Avogadro’s number, we can calculate the number of molecules in the given amount ... How many acetone, CH 3 COCH 3, molecules are in a 0.89 mole sample? 8. What is the mass of 100 billion billion (100 x 10 9 x 10 9) water molecules? This page viewed . This page titled Molecules and Moles (Worksheet) is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Mark Draganjac via source content that …Moles are overgrowths of skin cells called melanocytes. They are very common but genetic factors in their growth are not well understood. Learn more. Moles are very common, especia...(a) Mass of 1 mole of oxygen atoms = 16u; hence, it weighs 16g. Mass of 0.2 moles of oxygen atoms = 0.2 x 16 = 3.2g (b) Mass of 1 mole of water molecules = 18u; hence, it weighs 18g. Mass of 0.5 moles of water molecules = 0.5 x 18 = 9g. 10. Calculate the number of molecules of sulphur (S 8) present in 16g of solid sulphur. Solution:Although the two terms moles and molecules are distinct terms, the concept of moles can be used to measure the amount of molecules present in a sample. The main difference between mole and molecule is that mole is a unit of measurement of quantity whereas molecule is a chemical species that is made out of atoms. References: 1. “The …The mole is a unit used to measure the number of atoms, molecules, or (in the case of ionic compounds) formula units in a given mass of a substance. The mole is defined as the amount of substance that contains the number of carbon atoms in exactly 12 g of carbon-12 and consists of Avogadro’s number (6.022 × 10 23 ) of atoms of carbon-12. Oct 26, 2020 ... Solution Show Solution · Number of moles = 0.367 mol · Number of molecules of acetic acid = 2.210 × 1023 molecules.One mole of H 2 O is 6.022 x 10 23 molecules of H 2 O ( Avogadro's number). This relation is then used to 'convert' a number of H 2 O molecules to grams by the ratio: mass of X molecules of H 2 O / X molecules = mass of a mole of H 2 O molecules / 6.022 x 10 23 molecules. Solve for the mass of X molecules of H 2 O.May 11, 2023 · One mole of glycine, C 2 H 5 O 2 N, contains 2 moles of carbon, 5 moles of hydrogen, 2 moles of oxygen, and 1 mole of nitrogen: The provided mass of glycine (~28 g) is a bit more than one-third the molar mass (~75 g/mol), so we would expect the computed result to be a bit greater than one-third of a mole (~0.33 mol). Nov 3, 2010 ... – That is, at room temperature and pressure, the volume of 1 mole of any gas (6 × 1023 atoms of He, or 6 × 1023 molecules of H2 or 6 × 1023 ...One mole, 1 mol, of a substance is defined as: the Avogadro constant number of particles (which is 6.02 × 10 23 atoms, molecules, formulae close formula A combination of symbols that indicates ...One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms ...Formula: The formula to calculate molecules from moles is quite straightforward. It involves multiplying the number of moles by Avogadro’s number, which is approximately 6.02214076 x 10^23. The formula can be expressed as: Molecules = Moles * 6.02214076 x 10^23.The answer is 6.0221415E+26. We assume you are converting between molecule and kilomole . You can view more details on each measurement unit: molecules or kmol The SI base unit for amount of substance is the mole. 1 mole is equal to 6.0221415E+23 molecules, or 0.001 kmol. Note that rounding errors may occur, so always check the …It is important to remember that the number of molecules is not affected by the number of atoms in each molecule, as one mole of any substance ...Conversion Between Moles and Atoms, Molecules and Ions. Using our unit conversion techniques learned in Chapter 1, we can use the mole relationship and the chemical formula to convert back and forth between the moles and the number of chemical entities (atoms, molecules or ions). Because 1 N 2 molecule contains 2 N atoms, 1 mol …How many atoms in 5.5 moles? How many moles is 4.6 x 10^24 sulfur atoms? We'll solve problems like these, where we convert back and forth between moles and t...The Avogadro number is the constant based on which the molecule to moles conversion is done. The constant 6.02 x 10^23 is such number which decides the conversion results. Try this online convert Molecules to Moles Calculator to do the conversion in the most and reliable and simple way. For you to understand the manual calculation steps and ...It is equal to the relative atomic mass expressed in grams. We can easily arrive at the following important relationships. 1. 1 mole of atom of an element. = number of atoms in 1 gram-atom of the element. = 6.022 x 1023 atoms. 2. (a) The absolute mass of 1 atoms of an element. =. =.Monomers are small molecules that are the foundation for much bigger things. Learn more about monomers at HowStuffWorks. Advertisement To understand a monomer, picture a set of bea...A mole ratio is the ratio between the amounts in moles of any two compounds involved in a balanced chemical reaction. The balance chemical equation provides a comparison of the ratios of the molecules necessary to complete the reaction. We cannot calculate mole ratio for an unbalanced equation.Mole ratios are used as conversion factors between ...Molar mass of a substance is the mass in grams of one mole of the compound. In a substance, the amount of entities present e.g. atoms, molecules, ions, is defined as a mole. A mole of any substance is 6.022×1023 molecules. Just as we take a standard value to calculate different things e.g. 1 dozen =12 items similarly we use the mole to ...Learn how to convert molecules to moles using Avogadro's number (6. 02 x 10^23) with examples and steps. Find out the number of moles present in water, phenol, …The conversion between the molecules and moles is done by using the Avogadro’s number as below: For converting moles to molecules, multiply \(6.02214076 * 10^{23}\) by the number of moles; For converting molecules to moles, divide the number of molecules by \(6.02214076 * 10^{23}\) How Many Atoms In A Mole? In mathematical form, this relationship is: PV=nRT P V =nRT. R is a constant known as the ideal gas constant. When you measure the pressure in atmospheres, the value of R is 0.082057 L atm mol -1 K -1 or 8.3145 m 3 Pa mol -1 K -1 (where [L] stands for liters). This relationship is technically valid only for an ideal gas, which is one that has ...The first conversion factor converts from moles of particles to the number of particles. The second conversion factor reflects the number of atoms contained within each molecule. Figure 4.2.2 4.2. 2: Two water molecules contain 4 hydrogen atoms and 2 oxygen atoms. A mole of water molecules contains 2 moles of hydrogen atoms and 1 …A mole calculator that helps you find the number of moles, mass, or molecular weight of a substance using the Avogadro's number. Enter the values to calculate the quantity of a …Underwater tunnels, like the Marmaray, rely on some extreme construction techniques. Learn more about underwater tunnels at HowStuffWorks. Advertisement Contrary to what super vill...See full list on convertunits.com Chemists use the term mole to represent a large number of atoms or molecules. Just as a dozen implies 12 things, a mole (abbreviated as mol ) represents 6.022 × 10 23 things . The number 6.022 × 10 23 , called Avogadro’s number after the 19th-century chemist Amedeo Avogadro, is the number we use in chemistry to represent macroscopic amounts ... Summary. The balanced chemical reaction can be used to determine molar relationships between substances. 8.3: Mole-to-Mole Conversions is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts. Previously, you learned to balance chemical equations by comparing the numbers of each type of atom in the ... The Avogadro number is the constant based on which the molecule to moles conversion is done. The constant 6.02 x 10^23 is such number which decides the conversion results. Try this online convert Molecules to Moles Calculator to do the conversion in the most and reliable and simple way. For you to understand the manual calculation steps and ... Mole to Mass Conversions. We have established that a balanced chemical equation is balanced in terms of moles, as well as atoms or molecules. We have used balanced equations to set up ratios, in terms of moles of materials, that we can use as conversion factors to answer stoichiometric questions—such as how many moles of substance A …To correctly estimate the number of moles, n, of a substance of a specific mass, m, (in grams), you need to follow the grams to moles formula: n = m / M, where: …The mole (symbol: mol) is the base unit of amount of substance ("number of substance") in the International System of Units or System International (SI), defined as exactly 6.02214076×10 23 particles, e.g., atoms, molecules, ions or electrons. Avogadro's number is related to moles of any substance X as follows:Nov 3, 2010 ... – That is, at room temperature and pressure, the volume of 1 mole of any gas (6 × 1023 atoms of He, or 6 × 1023 molecules of H2 or 6 × 1023 ...We can use these ratios to determine what amount of a substance, in moles, will react with or produce a given number of moles of a different substance. The study of the numerical …Aug 22, 2016 ... This general chemistry video tutorial focuses on avogadro's number and how it's used to convert moles to atoms. This video also shows you ...The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is "mol." Definition: Micromole. The SI prefix "micro" represents a factor of 10-6, or in exponential notation, 1E-6. So 1 micromole = 10-6 moles. The definition of a mole is as follows:The mole provides a link between an easily measured macroscopic property, bulk mass, and an extremely important fundamental property, number of atoms, molecules, and so forth. A mole of substance is that amount in which there are 6.02214076 × × 10 23 discrete entities (atoms or molecules).How to Find Moles? First of all, every element has a different molar mass and is expressed as gram per mole. For example, the Chlorine (Cl) has a molar mass of 35.4530 g/mol in the same way Sodium (Na) has a molar mass of 22.9898 g/mol. Moreover, most of the molecules are made up of more than 1 element.The answer is 6.0221415E+23. We assume you are converting between molecule and mole . You can view more details on each measurement unit: molecules or moles The SI base unit for amount of substance is the mole. 1 molecules is equal to 1.660538863127E-24 mole. Note that rounding errors may occur, so always check the results. It is important to remember that the number of molecules is not affected by the number of atoms in each molecule, as one mole of any substance ...
Knowing the molecular mass is necessary to convert grams to moles. Multiply the number of atoms each element contributes to the compound by the atomic weight of that element. Add the total weight of each element in the compound together. For example, (NH 4) 2 S has a molecular weight of (2 x 14.01) + (8 x 1.01) + (1 x 32.07) = …. Faucet repair
Learn how to convert the number of moles to number of molecules. When converting from moles to molecules we'll multiply the number given for moles by Avogad...Molecules are the simplest unit of a covalent compound, and molecules can be represented in many different ways. Atoms are the smallest units of matter that still retain the fundamental chemical properties of an element. Much of the study of chemistry, however, involves looking at what happens when atoms combine with other atoms to form …Oct 3, 2022 ... Avogadro's number is the number of items in one mole. The number is experimentally determined based on measuring the number of atoms in ...Formula: The formula to calculate molecules from moles is quite straightforward. It involves multiplying the number of moles by Avogadro’s number, which is approximately 6.02214076 x 10^23. The formula can be expressed as: Molecules = Moles * 6.02214076 x 10^23.The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is "mol." Definition: Micromole. The SI prefix "micro" represents a factor of 10-6, or in exponential notation, 1E-6. So 1 micromole = 10-6 moles. The definition of a mole is as follows:Diatomic elements are molecules composed of only two atoms, every time, always. There are only seven of them on the entire periodic table. Advertisement Diatomic elements hate to b...See full list on convertunits.com Mole, standard unit (6.02214076 x 10^23) in chemistry for measuring large quantities of very small entities such as atoms, molecules, or other specified particles. The number of units in a mole also bears the name Avogadro’s number, or Avogadro’s constant, in honor of the Italian physicist Amedeo Avogadro.Chemists use the term mole to represent a large number of atoms or molecules. Just as a dozen implies 12 things, a mole (abbreviated as mol ) represents 6.022 × 10 23 things . The number 6.022 × 10 23 , called Avogadro’s number after the 19th-century chemist Amedeo Avogadro, is the number we use in chemistry to represent macroscopic amounts ... A balanced chemical equation gives the identity of the reactants and the products as well as the accurate number of molecules or moles of each that are consumed or produced. Stoichiometry is a collective term for the quantitative relationships between the masses, the numbers of moles, and the numbers of particles (atoms, molecules, and ions) of ... We know that the mass of water is 56g. The molecular mass is noted for this calculation instead of atomic mass, as water is a molecule. Molecular mass of water = 18.015g/mol. Grams to moles conversion equation is, Moles = 56/18.015.Mar 26, 2016 · From volume (liters) to moles: Divide your initial volume by the molar volume constant, 22.4 L. From moles to volume (liters): Multiply your mole value by the molar volume constant, 22.4L. From particles (atoms, molecules, or formula units) to moles: Divide your particle value by Avogadro’s number, 6.02 × 10 23. Feb 14, 2020 · Notice the number of moles is used from Step 2 to start the calculation from moles to molecules: 0.54 mol of CaCl 2 × 6.022 x 1023 molecules / 1 mol of CalCl 2 = 3.25 x 1023 molecules. To answer the example question, there are 3.25 × 10 23 molecules in 60.50 grams of calcium chloride. Steps 2 and 3 can be combined. The total number of atoms/molecules in a sample can be calculated by multiplying the number of moles with the Avogadro constant. This formula can be written as: Number of Atoms or Molecules = (Number of Moles)* (6.022*1023) The relationship between the atomic mass unit (amu) and the gram is given by: One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles.. Created by Sal Khan. For example, 10 molecules of nitrogen would react with 30 molecules of hydrogen to produce 20 molecules of ammonia. The most useful quantity for counting particles is the mole. So if each coefficient is multiplied by a mole, the balanced chemical equation tells us that 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 …Learn how to convert molecules to moles using Avogadro's number (6. 02 x 10^23) with examples and steps. Find out the number of moles present in water, phenol, …Divide the mass of the molecular substance by its molar mass to get moles. Then multiply times (6.022xx10^23"molecules")/(1"mol"). Determine the mass of the substance, and its molar mass. Divide the given mass by its molar mass to get moles, then multiply times (6.022xx10^23"molecules")/(1"mol")..