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What is the empirical formula for 1.443 g Se 5.841g Br?
To find the empirical formula, you need to convert the given masses of Se and Br into moles. 1.443 g Se is 0.018 moles Se, and 5.841 g Br is 0.036 moles Br. Next, divide the moles of each element by the smallest number of moles to obtain the simplest whole-number ratio. Thus, the empirical formula is SeBr2.
How do you convert 200mL to moles?
To convert 200mL to moles, you need to know the substance's molar mass. Once you have the molar mass, you can use the formula moles = volume (in liters) / molar volume to determine the number of moles. Remember to convert milliliters to liters by dividing by 1000.
How many moles of NF3 are in 850.49 grams of nitrogen trifluoride?
To find the number of moles of NF3 in 850.49 grams, you first need to convert the mass to moles using the molar mass of NF3, which is 71.00 g/mol. Moles of NF3 = 850.49 g / 71.00 g/mol = 11.98 moles.
How do you convert 65.0 g HCl to moles?
To convert grams of a substance to moles, you need to divide the given mass by the molar mass of the substance. The molar mass of HCl (hydrochloric acid) is 36.46 g/mol. Therefore, 65.0 g of HCl is equivalent to 65.0 g / 36.46 g/mol = 1.78 moles of HCl.
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.
What is the empirical formula for 1.443 g Se 5.841g Br?
To find the empirical formula, you need to convert the given masses of Se and Br into moles. 1.443 g Se is 0.018 moles Se, and 5.841 g Br is 0.036 moles Br. Next, divide the moles of each element by the smallest number of moles to obtain the simplest whole-number ratio. Thus, the empirical formula is SeBr2.
What mass of KI is present in 276 mL of a 0.50 M solution?
To calculate the mass of KI in the solution, first calculate the number of moles of KI present using the formula moles = Molarity x Volume (in liters). Then, use the molar mass of KI (potassium iodide) to convert moles to grams. The molar mass of KI is 166 g/mol.
How do you convert 200mL to moles?
To convert 200mL to moles, you need to know the substance's molar mass. Once you have the molar mass, you can use the formula moles = volume (in liters) / molar volume to determine the number of moles. Remember to convert milliliters to liters by dividing by 1000.
How many moles of NF3 are in 850.49 grams of nitrogen trifluoride?
To find the number of moles of NF3 in 850.49 grams, you first need to convert the mass to moles using the molar mass of NF3, which is 71.00 g/mol. Moles of NF3 = 850.49 g / 71.00 g/mol = 11.98 moles.
How do you convert 26.7kg of helium into moles of helium?
To convert grams to moles, divide the given mass by the molar mass of helium. The molar mass of helium is approximately 4g/mol. Therefore, 26.7kg of helium is equal to 26,700g, which would be 6,675 moles of helium.
How do you convert 65.0 g HCl to moles?
To convert grams of a substance to moles, you need to divide the given mass by the molar mass of the substance. The molar mass of HCl (hydrochloric acid) is 36.46 g/mol. Therefore, 65.0 g of HCl is equivalent to 65.0 g / 36.46 g/mol = 1.78 moles of HCl.
A sample of Se weighs 20.5 grams will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams?
A sample of Se weighs 20.5 grams. Will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams? (more, less): _______Calculate the mass of a sample of V that contains the same number of atoms. _______ grams of VAnswer:Since the atomic weight of V is smaller than the atomic weight of Se, each atom will have a smallermass, and the sample will weigh less.Since the same number of moles will contain the same number of atoms, regardless of the element, it is only necessary to find the number of moles of Se in the 20.5 gram sample, and then to find the mass of the same number of moles of V.The atomic weight of Se is 79.0 g/mol1. Convert grams of Se to moles of Se:moles Se= 20.5 g Se1 mol = 0.260 mol Se79.0 gMultiply by moles per gram. Grams cancel out.The atomic weight of V is 50.9 g/mol2. To convert 0.260 moles of V to grams of V:grams V = 0.260 mol V50.9 g = 13.2 g V1 molMultiply by grams per mole. Moles cancel out.
Convert the number of grams in 7.4 moles of aluminum phosphate?
The answer is 902,45 g.
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 do you convert moles to pounds?
To convert moles to pounds, you need to know the molar mass of the substance in grams/mol. Once you have the molar mass, you can convert moles to grams using the formula: moles x molar mass. Finally, you can convert the grams to pounds by dividing by 453.59 grams per pound.
What will be the molarity for a solution prepared by dissolving 30mg Se in 5ml 1-Octadecene?
To find the molarity, you need to calculate the number of moles of Se first. Since the molar mass of Se is about 78.97 g/mol, 30 mg is 0.03 g or 0.00038 moles. Next, calculate the volume of the solution in liters (5 ml is 0.005 L). Finally, divide the moles of Se by the volume in liters to get the molarity, which is around 0.076 M.
How many moles of MgSiO3 are in 215 g of the compound?
To find the number of moles, we first need to calculate the molar mass of MgSiO3. The molar mass of MgSiO3 is approximately 100.4 g/mol. To convert 215 g to moles, we divide the given mass by the molar mass: 215 g / 100.4 g/mol ≈ 2.14 moles of MgSiO3.
