Please please please answer this?

Question

i forget how to do this

in this equation Al2S3 + 6H2O --> 2Al(OH)3 + 3H2S

how many grams of aluminum hydroxide are obtained from 10.5 g of aluminum sulfide?

Answer 1

school doesn't start for 2 more weeks.

Answer 2

Step 1: Balance Equation

Al2S3 + 6H2O ---->2Al(OH)3 + 3H2S

Step 2: Since this is a limiting reagent question you must find the reagent first!!.

moles of Al2S3 = 158 g / 150.14 g/mol

= 1.052 mol

now find the moles of H2O ( Water)

n H2O

= 131g / 18.02 g/mol

= 7.269 mol

The mole ratio in the balanced equation indicates the mole ratio to be 1: 6 ( Al2S3 : H2O)

Therefore, the limiting reagent is Al2S3 since the minimum required moles for it to complete a reaction is 1.2115mol but only contains 1.052 mol.

Step 3: Mole Ratio (Al2S3: H2S)

The mole ratio from the balanced equation is 1:3

moles of H2S = 3(1.052 mol)

= 3.156 mol.

now find the mass of H2S.

m = (M) (n)

m = (34.08 g/mol) ( 3.156 mol)

m = 107.56 g.

Hope that helped!!!.

Answer 3

Sorry I got a C- in math.

Answer 4

ok for the balanced equation 1 mole of Al2S3 yields 2 moles of Al(OH)3

10.5 grams of Al2S3 ios 10.5/150grams /mol = 0.07 moles

so if 1 mole yield =s 2 moles of Al(OH)3 then 0.07 moles will yield 2 X 0.07 moles of the hydroxide

0.14 moles x 78 grams/mole = 10.92 grams

proof 150 grams Al2S3 yields 156 grams (2 X 78 grams) so 10.5 grams will yield

150/156 = 10.5 /x = 10.92  

Answer 5

There's a website called math answers and they answer your questions right away.  Try it out, google it!!!  Sorry, I'm not smart enough to answer that question, but Good Luck!!!!

Answer 6

okay this is how you do it:

find out how many moles of al2s3 you have (moles = mass (g) divided by formula mass (add up 2 al on the periodic table and 3 s)

then however many mloes you have of that, you have twice the number of moles of the hydroxide. so what you need to do is double that number and then work out the grams by rearranging the moles= mass divided by formula mass equation

Answer 7

idk

Answer 8

I don't understand a thing and I am not good in science.

Answer 9

hi whats your name?

Answer 10

10.9 g

and i am completely sure about that.

i took chem in 11 grade im a senior

Answer 11

I bet Google can help. :D