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Answered 2014-04-25 15:47:36

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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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 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


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).


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.


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 molar mass calcium bromide?

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


What is the mass of 1 mole of sodium bromide?

Sodium has an atomic mass of 22.99. Therefore 1 mole of it weighs 22.99 grams. Similarly a mole of bromine weighs 79.9 grams.A mole of sodium bromide - NaBr - contains 1 mole each of sodium and bromine (note that this is not true for all chemical salts) and so 1 mole of it weighs 102.89 grams.



What is the mass number for bromine?

the mass number for bromine is 79.904


What is the Mass number of a bromine atom?

Bromine has an approximate atomic mass of 79.904.


What is Bromine atomic mass?

Bromine is a metal element. Atomic mass of it is 79.90.


What is the molar mass magnessium bromide?

The molar mass of magnesium bromide is approximately 203 g/mol.


What is PBr4?

PBr(4) is an anion. Phosphorus (P) has oxidation number (or valency) of +3 whereas Bromine (Br) has oxidation number -1. The molecular mass is 350.5 g.


What is the gram molecular mass of lithium bromide?

The atomic mass of lithium is 7. The atomic mass of the bromide ion is 80. Therefore the molecular mass is 87u.


What is atomic mass of bromine?

Bromine is a non metal element. Atomic mass of it is 79.


Mass number of bromine?

Bromine is a non metal element. Atomic mass of it is 80.


What is the molar mass of bromine?

The molar mass of Br (bromine) = 79.904 g/mol


What is the the mass number for bromine?

Bromine is a non metal element. Mass number of it is 80.


A piece of aluminum foil 0.550 mm thick and 1.00 cm square is allowed to react with bromine to form aluminum bromide A How many miles of aluminum were used The density of aluminum is 2.699 g cm3?

The answer will depend on how much bromine it reacted with or how much auminium bromide was produced. Since this information is not provided, it is not possible to answer the question.


What is the percentage of hydrogen in hydrogen Bromide?

It all depends on what you're looking for. If you mean ratio of atoms, It is a one:one ratio, so 50% each If you mean mass, 1.0125% of the mass of one molecule is hydrogen and the other 98.9875% is bromine.


What is the unit for the atomic mass of Bromine?

Bromine is a non meta element. Atomic mass of it is 80.


What is relative atomic mass of bromine?

Bromine is a non metal element. Atomic mass of it is 79.90.


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