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...
1. Find the Number of Moles of Each Element The molar mass of hydrogen is 1 g (rounding to one decimal place), so the number of moles present in the compound is 0.675/1 = 0.675. The molar mass of oxygen is 16 g, and the molar mass of calcium is 40.1 g. Performing the same ...
Mole:A mole is Avogadro's number of atoms or molecules or particles. Mole Ratio General Chemical Formula:{eq}A_a B_b C_c ... {/eq} where the capital letters represent the atomic elements and the small letters represent the number of moles. ...
As discussed in Raymond Chang’s introductory textbook “Chemistry,” a mole is a measure of molecules, equal to approximately 6.022x10^23 molecules, where the caret ^ refers to exponentiation. Using the ideal gas formula, you can find the number of moles of carbon dioxide (CO2) in a contai...
Number of Moles :The number of moles of solute is given by the ratio of the mass of the solute to the molar mass of the same solute. We can write it as : n=mM Where, n is the number of moles m is the mass of a given solute M...
Calculate the molarityof a solution prepared by dissolving 23.7 grams of KMnO4into enough water to make 750 mL of solution. This example has neither the moles nor liters needed tofind molarity, so you must find the number ofmolesof thesolutefirst. ...
How many molecules are found in 0.4 moles of SO2?Calculate the empirical formula of a compound containing 14.7 g of nickel and 40.0 g of bromine.Show work.就这两个……急求! 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 请把它翻译过来,这题的化学知识非常简单.但是英文...
Grams to Moles Step 1 Find the number of gramsof the substance. You will know from the problem how many grams and what the substance is, for example, 12 g of water. Step 2 Find the molecular weight of each atom in the substance. The molecular weight is how much each molecule of the...
molecular mass. Gram molecular mass is equal to the sum of the masses of all the component atoms present in a molecule. If we have a given mass of a sample, then we can find the number of moles of molecu...
n = number of moles (which is related to the mass of the gas, i.e. 1 mol = 6.023x1023 molecules of the gas, and n = mass (in grams)/molar mass(MM)), R = the ideal gas constant, and T = the absolute temperature.What...