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Multiply the mass of the compound by the conversion factor based on the percent composition of the element in the compound

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How many MOLES of sodium nitrate are present in 2.85 grams of this compound?

To find the number of moles, first calculate the molar mass of sodium nitrate (NaNO3), which is 85 grams/mol. Then, divide the given mass (2.85 grams) by the molar mass to obtain the number of moles present, which is approximately 0.0335 moles.


How many moles of Na SO4 are in 25.0 of this compound?

To find the number of moles of Na2SO4 in 25.0 g of the compound, you need to convert the mass to moles. First, determine the molar mass of Na2SO4, then divide the given mass by the molar mass to obtain the number of moles.


Which statement shows how to correctly convert from the mass of a compound in grams to the amount of that compound in moles?

To convert from the mass of a compound in grams to the amount of that compound in moles, you need to divide the mass of the compound in grams by its molar mass (which is found on the periodic table). This will give you the number of moles of the compound. The formula to use is: moles = mass (g) / molar mass.


How can one determine the empirical formula from given percentages of elements in a compound?

To determine the empirical formula from given percentages of elements in a compound, you first need to convert the percentages to grams. Then, divide the grams of each element by its molar mass to find the moles of each element. Next, divide the moles of each element by the smallest number of moles to get the simplest whole number ratio. Finally, use these ratios to write the empirical formula of the compound.


0.871 moles is how many grams?

Multiply the number of moles by the molecular weight of the compound (or atomic weight for an element) to find the mass in grams.


Formula for moles?

number of moles = mass of the material/molar mass


How many moles of Na are in 42 grams of Na?

To find the number of moles of Na in 42 grams, we can use the molar mass of Na, which is approximately 23 grams/mol. First, calculate the number of moles by dividing the given mass by the molar mass: 42 grams / 23 grams/mol = 1.83 moles of Na.


Convert grams to moles?

To convert grams to moles, you need to know the molar mass of the substance. Divide the given mass in grams by the molar mass to find the number of moles. This calculation is done using the formula: moles = grams / molar mass.


How do calculate how many mole are in grams?

To calculate the number of moles in grams, you need to divide the given mass in grams by the molar mass of the substance (in g/mol). The formula is: Moles = Mass (g) / Molar mass (g/mol). This will give you the number of moles of the substance.


Empirical formula for a compound that contains 32.2 percent Ca and 67.8 percent N by mass?

Assume the compound has a molar mass of 100 grams, from the information given, 32.2 grams is Calcium and 67.8 grams is Nitrogen.You then find the moles of each, which would be moles of Ca and moles of N.Dividing the two moles gives you the mole fraction: which we approximate to 6. This means that for every 1 mole of Ca, there are 6 moles of N, thus the answer is


How many moles are in 150 grams what compound NaCl?

To calculate the number of moles in 150 grams of NaCl, you need to know the molar mass of NaCl, which is approximately 58.44 g/mol. You can then divide the given mass (150 grams) by the molar mass to get the number of moles. In this case, 150 g / 58.44 g/mol ≈ 2.57 moles of NaCl.


How many moles of sodium carbonate were present in 2 grams of hydrated sodium carbonate?

To determine the number of moles of sodium carbonate in 2 grams of hydrated sodium carbonate, we first need to calculate the molar mass of Na2CO3·xH2O. Once we have the molar mass, we can use the formula: Moles = Mass / Molar mass. Given that hydrated sodium carbonate has the molar mass of Na2CO3·xH2O, we can determine the number of moles in 2 grams of the compound.