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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.

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Q: What is the mass of bromine in 50.0g potassium bromide?
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What is the molar mass of potassium bromide?

Molar mass for Potassium is 39 mole. Molar Mass for Bromine is 80 mole. So by adding them both we get Molar mass for Potassium Bromide which is 119. Thank you.


What is the mass of kbr in 2.50 moles of the compound?

The mass number of potassium is about 39. The mass number of bromine is about 80. Total is 119. 119* 2.5 = 297.5. So 297.5 grams of potassium bromide has got 2.5 gram moles.


What mass of KBr is contained in 2.50 moles of the compound?

The mass number of potassium is about 39. The mass number of bromine is about 80. Total is 119. 119* 2.5 = 297.5. So 297.5 grams of potassium bromide has got 2.5 gram moles.


What is the atomic mass of bromide?

The atomic weight of bromine is 79,904 amu.


What is The formula mass of potassium bromide?

Potassium bromide is KBr, so by adding together their molar masses, we get 39+80=119gmol-1


Calculate the molecular mass of hydrogen bromine?

The atomic mass of hydrogen is 1u. Atomic mass of bromine is 80u. Therefore, the molar mass of hydrogen bromide is 1+80=81u.


Aluminum will react with bromine to form aluminum bromide Al2Br6 What mass of bromine g is needed to form 1.42 mol of Al2Br6?

The gram formula unit or molar mass for aluminum bromide is 533.38.* Therefore, 1.42 moles has a mass of 757.4 grams. The mass of 6 moles of bromine atoms is 479.42. Therefore, the mass fraction of bromine in aluminum bromide is 479.42/757.4 or 0.633, and the mass in grams of bromine required to form 1.42 moles of aluminum bromide is 0.633 X 757.4 or 479 grams, to the justified number of significant digits (limited by the precision given for the number of moles.) ___________________ *This is equal to the sum of (2 times the gram atomic mass of aluminum) and (6 times the gram atomic mass of bromine).


How many moles are contained in 245g of potassium bromide?

Potassium bromide is KBr, the atomic mass of this compound is ca. 119.1. no.moles = mass/relitive molecular mass, so in this case that's 245/119.1 = 2.057 moles of KBr.


How many neutrons are there in a bromide ion?

In a bromide ion there are 45 neutrons. There are also 35 protons, as shown by the atomic number of 35. The atomic mass of bromine is 80.


What is the density of a piece of metal that has a volume of 10cm3 and a mass of 500g?

Volume = mass/volume = 500g/10cm3 = 50g/cm3


What is the molar mass calcium bromide?

The molar mass of calcium bromide is........99,88.


What is the mass number for bromine?

the mass number for bromine is 79.904

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