To calculate the mass of 2x10^12 atoms of potassium, you first need to find the molar mass of potassium (39.10 g/mol). Then, divide the number of atoms by Avogadro's number to get the moles of potassium. Finally, multiply the moles by the molar mass to find the mass in grams, which in this case would be 0.01566 grams.
To calculate the number of potassium atoms, you first need to convert the mass of potassium to moles using the molar mass of potassium (39.10 g/mol). Then, use Avogadro's number (6.022 x 10^23 atoms/mol) to find the number of potassium atoms present in the given mass.
To find the grams of potassium in K2CrO7, first determine its molar mass. Potassium (K) has a molar mass of 39.10 g/mol, and K2CrO7 has two potassium atoms, so (39.10 g/mol) * 2 = 78.20 g/mol. Then, divide the mass of K2CrO7 by its molar mass to get the grams of potassium: (27.8 g) / (294.19 g/mol) ≈ 9.45 g of potassium.
In potassium dichromate (K2Cr2O7), there are 7 oxygen atoms per molecule. Therefore, two moles of K2Cr2O7 would contain 14 moles of oxygen atoms. Each mole of oxygen atoms has a molar mass of approximately 16 grams, so there would be 224 grams of oxygen in two moles of potassium dichromate.
To find the molar mass of an element in grams, you can look up the atomic mass of the element on the periodic table. This atomic mass is the mass of one mole of atoms of that element in grams.
The molar mass of potassium iodide (KI) is approximately 166.0 grams per mole.
The mass is 2.86 grams but the weight will be 0.028 Newtons.
To calculate the number of potassium atoms, you first need to convert the mass of potassium to moles using the molar mass of potassium (39.10 g/mol). Then, use Avogadro's number (6.022 x 10^23 atoms/mol) to find the number of potassium atoms present in the given mass.
The gram atomic mass of gold is 196.967 and that of potassium is 39.0983. Therefore, equal numbers of atoms of potassium are supplied by 39.0983/196.967 the mass of potassium compared with gold. 5 X 9.85 = 49.25. This contains the same number of gold atoms as 49.25(39.0983/196.967) or 9.78 grams of potassium contains of potassium atoms, to the justified number of significant digits (limited by the number "9.85", assuming that "5" is intended to be exact.)
To find the grams of potassium in K2CrO7, first determine its molar mass. Potassium (K) has a molar mass of 39.10 g/mol, and K2CrO7 has two potassium atoms, so (39.10 g/mol) * 2 = 78.20 g/mol. Then, divide the mass of K2CrO7 by its molar mass to get the grams of potassium: (27.8 g) / (294.19 g/mol) ≈ 9.45 g of potassium.
The molar mass of potassium (K) is approximately 39.10 g/mol. This means that one mole of potassium atoms would weigh about 39.10 grams. In a liter of potassium, there would be approximately 1 mole of potassium atoms, so the mass would be around 39.10 grams.
Every atom of potassium has a mass of 39 amu. Each mole of potassium has a mass of 39 grams.
In potassium dichromate (K2Cr2O7), there are 7 oxygen atoms per molecule. Therefore, two moles of K2Cr2O7 would contain 14 moles of oxygen atoms. Each mole of oxygen atoms has a molar mass of approximately 16 grams, so there would be 224 grams of oxygen in two moles of potassium dichromate.
To find the molar mass of an element in grams, you can look up the atomic mass of the element on the periodic table. This atomic mass is the mass of one mole of atoms of that element in grams.
The molar mass of potassium iodide (KI) is approximately 166.0 grams per mole.
To find the number of moles in 5 grams of potassium sulfate (K2SO4), first calculate the molar mass of K2SO4 by adding the atomic masses of potassium (K), sulfur (S), and four oxygen (O) atoms. Then, divide the given mass (5 grams) by the molar mass of K2SO4 to get the number of moles.
To find the mass of the sample, you would first determine the molar mass of potassium (approximately 39.1 g/mol). Then, you would multiply the number of atoms by the molar mass to find the total mass. In this case, you would calculate (1.72 x 10^23 atoms) x (39.1 g/mol) = mass of the sample.
The atomic mass of potassium, K is 39.1. This means that 1 mole of potassium has a mass of 39.1g. Mass of 0.5mol of K = 0.5 x 39.1 = 19.6g