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3.21 moles HBr (6.022 X 10^23/1mole HBr)

= 1.93 X 10^24 molecules of HBr

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โˆ™ 2010-05-30 00:05:16
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Q: How many molecules are in 3.21 moles of HBr?
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How many moles are present in 1.21 molecules of HBr?

2.01 mol


How many moles are in 186 grams of HBr?

For this you need the atomic (molecular) mass of HBr. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel. HBr= 81.0 grams186 grams HBr / (81.0 grams) =2.30 moles HBr


How many moles are in 135 g of hydrobromic acid?

In the English language hydrobromic acid is the solution of HBr in water; the name of the acid HBr is hydrogen bromide. 135 g HBr are equivalent to 1,67 moles.


How many kilojoules are associated with the formation of 2 moles of HBr?

-73


What is the concentration of a HBr solution in 12.0 mL of the solution is neutralized by 15.0 mL of a 0.25 M KOH solution?

Balanced equation. KOH + HBr -> KBr + H2O everything is one to one, so... Molarity = moles of solute/liters of solution ( change ml to liters ) 0.25 M KOH = moles KOH/0.015 liters = 0.00375 moles of KOH this is as many moles that you have of HBr, so... Molarity of HBr = 0.00375 moles/0.012 liters = a concentration of HBr that is 0.31 M


How many grams are in 5.00x10^24 molecules of lithium hydroxide?

A mole is the quantity of any molecule, atom, etc that has the same number of ... If I have 6.022×1023 H2 molecules, I have a mass of 2 gram of hydrogen molecules. ... How many moles are present in 1.21 X 10^24 molecules of HBr? ... How do you convert the amount of atoms in each battery to moles of lithium atoms?


How many grams of solid sodium hydroxide would need to be added to completely neutralize 35.0 mL of 1.45 M HBr?

This is a titration question: we want to have the same number of hydroxide ions as hydroxide ions so that they will form water and the pH will be neutral. In chemistry, we count atoms and molecules in moles, and we can calculate how many moles of HBr we have, because concentration in molarity is the number of moles divided by the volume in liters... M = moles/V. We plug in what we got: 1.45M = moles/0.0350L, and solve for moles: 0.0508 moles. Now we know we need 0.0508 moles of NaOH, whose molecular weight is 40g/mole. MW x moles = grams, so (40g/mole)(0.0508 moles) = 2.03 g of NaOH.


How many kilo-joules are associated with the formation of 2 moles of HBr(g)?

The energy is -72,26 kJ.


How many valence electrons does HBr have?

how many valence electron does HBr have


What volume of a 0.394 M hydrobromic acid solution is required to neutralize 29.2 mL of a 0.140 M sodium hydroxide solution?

HBr + NaOH ------> NaBr + H2O so it is a 1:1 molar reaction. 29.2/1000 x 0.140 = 0.004088 moles of sodium hydroxide present and thus the same number of moles of HBr required. There are 0.394/1000 = 0.000394 moles per mL of HBr and thus 0.004088/0.000394 = 10.38 mL (2 decimal places) of HBr required for neutralization.


How many moles of ammonium bromide can be produced from 250 moles of bromine and 600 moles of ammonia?

Ther answer is none! ammonium bromide is made from hydrogen bromide and ammonia NH3 + HBr = NH4Br i mole of each makes 1mole of ammonium salt.


How many grams HBr are required to produce 150g AlBr3 in the equation 2Al plus 6HBr producing 2AlBr3 and 3H2?

Given the balanced equation2Al + 6HBr --> 2AlBr3 + 3H2In order to find how many grams of HBr are required to produce 150g AlBr3, we must convert from mass to mass (mass --> mass conversion).150g AlBr3 * 1 mol AlBr3 * 6 molecules HBr = 136.52 or 137g HBr----------- 266.6g AlBr3 * 2 molecules AlBr3


What gas would deviate more from ideality H2 or HBr?

HBr because it's a dipole, which increases the force of attraction between the molecules.


Is gas polar?

Some gases have polar molecules as HCl, HBr, SO2, but not all gases have polar molecules.


What is the expression for Ka of hydrobromic acid?

Ka = [H+].[Br-] / [HBr] However the value of this expression is very high, because HBr is a STRONG acid, meaning that much more than 99.9% of the HBr molecules in water are protolized (ionized), making [H+] and [Br-] equal to the original (added) HBr amount, and the [HBr]-value nearly zero.


Why is the boiling point of HI higher than HBr?

This is to do with the intermolecular forces in the two compounds. There are no hydrogen bonds between the molecules of either compound, since Br and I are not electronegative enough to polarise the molecules sufficiently. But since HI molecules contain more electrons than HBr, there are increased van der Waals forces in HI. For the same reason HBr has a higher boiling point than HCl, but HF has a higher boiling point than HCl, HBr or HI because of hydrogen bonding.


How many electrons do HBr have?

46


Which is least polar HF HBr HCl or Hbr?

HBr


Write the expression for Ka for the dissociation of HBr?

Ka={ [H+] [Br-] }/ [HBr] Which turns into Ka= x2/ ([HBr] - x) [HBr] = initial concentration of HBr


How many valence electron does HBr have?

8


What is the balanced equation for H2 Br2-HBr?

H2 + Br2 = 2 HBr


Shape of HBr?

The shape of HBr is linear.


Is HBr a triprotic acid?

No, HBr is monoprotic.


Is hbr an electrolyte?

yes HBr is an electrolyte


What the name of hbr?

HBr is hydrogen bromide