Potassium bromide is KBr, so by adding together their molar masses, we get 39+80=119gmol-1
The molar mass of calcium bromide is........99,88.
The molar mass of KBr is 119.0023 g/mol
The molar mass for potassium iodide is 166,0028.
Since we know the mass and molar mass, we can just insert them into this equation: n = m / M where n is the number of moles, m is the mass and M is the molar mass. I will not do the calculation for you, you should make your homework yourself (the molar mass of potassium can be found in the periodic table) :)
The molar mass of magnesium bromide (MgBr2) is approximately 184.113 grams per mole. This value is calculated by adding the atomic weights of magnesium (24.305 g/mol) and two bromine atoms (79.904 g/mol each) together.
To find the number of moles in 245g of potassium bromide, first calculate the molar mass of KBr by adding the atomic masses of potassium (39.10 g/mol) and bromine (79.90 g/mol). The molar mass of KBr is 119.00 g/mol. Then, divide the given mass by the molar mass: 245g / 119.00 g/mol = 2.06 moles of potassium bromide.
The molar mass of calcium bromide is........99,88.
The molar mass of KBr is 119.0023 g/mol
The molar mass of the element potassium is 39 g/mol.
Sodium iodide has the highest molar mass among the compounds listed, with a molar mass of 149.89 g/mol. Sodium bromide has a molar mass of 102.89 g/mol, sodium chloride has a molar mass of 58.44 g/mol, lithium bromide has a molar mass of 86.85 g/mol, and lithium fluoride has a molar mass of 25.94 g/mol.
The molar mass for potassium iodide is 166,0028.
The chemical formula of potassium bromide is KBr, showing that each formula unit contains equal numbers of potassium and bromine atoms. The gram atomic masses of potassium and bromine are 39.0983 and 70.904 respectively. Therefore, the mass fraction of bromine in KBr is 70.904/(70.904 + 39.0983) or about 0.644568. 50.0 g of potassium bromide therefore contains 32.2 g of bromine, to the justified number of significant digits.
Since we know the mass and molar mass, we can just insert them into this equation: n = m / M where n is the number of moles, m is the mass and M is the molar mass. I will not do the calculation for you, you should make your homework yourself (the molar mass of potassium can be found in the periodic table) :)
The molar mass of magnesium bromide (MgBr2) is approximately 184.113 grams per mole. This value is calculated by adding the atomic weights of magnesium (24.305 g/mol) and two bromine atoms (79.904 g/mol each) together.
"Potassium bromide"
I believe it is 174.2592, but I could be mistaken. I believe it is 174.2592, but I could be mistaken. KNO3 has a molar mass of 101.10303
To find the mass of 1.474 mol of potassium sulfide, you need to multiply the number of moles by the molar mass of potassium sulfide. The molar mass of potassium sulfide (K2S) is approximately 110.26 g/mol. Therefore, the mass of 1.474 mol of potassium sulfide is about 162.62 grams.