1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
gogolik [260]
3 years ago
5

The percentage by mass of Br in the compound

Chemistry
2 answers:
tino4ka555 [31]3 years ago
8 0
What you have to do it find the percentage / solve it. Divide the mass by the entire mass. 
<span>239.7 </span>÷<span> 266.68 = 0.898 </span>×<span> 100 = 90% Br.</span>
Sholpan [36]3 years ago
6 0

Answer: The correct answer is option(4).

Explanation:

Molar mass of the aluminium bromide, AlBr_3=266.69 g/mol

Atomic mass of bromine = 79.90 g/mol

Percentage of Mass of bromine in AlBr_3:

\% Br\text{ by mass}=\frac{\text{Atomic mass of Br}\times \text{Number of Br atoms}\times 100}{\text{Molar mass of }AlBr_3}

\% Br\text{ by mass}=\frac{79.90 g/mol\times 3\times 100}{266.69 g/mol}=89.97\%\approx 90\%

Hence, the correct answer is option(4).

You might be interested in
Si tuvieras que definir los atomos segun los postulados de Dalton, dirias que los atomos son particulas:
Arada [10]

Answer:

Según el científico inglés John Dalton, los átomos son esferas elásticas e indivisibles. Así, según él, el átomo es el bloque de construcción más pequeño de la materia. Es homogéneo e indivisible, y todos los átomos de un elemento químico dado son idénticos (es decir, tienen el mismo conjunto de propiedades).

Aunque se descubrió a finales del siglo XIX que los átomos están hechos de partículas aún más pequeñas y pueden sufrir transformaciones, y que los átomos de un elemento dado pueden diferir ligeramente entre sí (isótopos), la teoría de Dalton fue la base para el desarrollo de la tecnología química moderna.

3 0
3 years ago
What is the molality of a solution made by dissolving 15.20 g of i2 in 1.33 mol of diethyl ether, (ch3ch2)2o?
Paraphin [41]
The  molarity   of solution  made  by  dissolving  15.20g  of i2  in 1.33 mol  of diethyl ether (CH3CH2)2O  is    =0.6M

   calculation

molarity  =moles of solute/  Kg of the  solvent

mole  of the solute  (i2)  =  mass /molar mass
the molar mass of i2 = 126.9 x2 = 253.8 g/mol

moles is therefore=  15.2 g/253.8 g/mol  =  0.06  moles


calculate the Kg of solvent  (CH3CH2)2O
mass =  moles  x  molar mass
molar mass  of  (CH3CH2)2O= 74 g/mol

mass  is therefore = 1.33 moles  x  74 g/mol =  98.42 grams
in Kg = 98.42 /1000 =0.09842  Kg

molarity  is therefore = 0.06/0.09842 = 0.6 M

3 0
3 years ago
What is the correct chemical equation for the reaction between methane and oxygen to produce carbon dioxide and water?
kodGreya [7K]

Answer:

The answer to your question is:   CH₄     +    3/2 O₂     ⇒     CO₂    +   2 H₂O

Explanation:

Methane = CH₄

Oxygen = O

Carbon dioxide = CO₂

Water = H₂O

                      CH₄     +    3/2 O₂     ⇒     CO₂    +   2 H₂O

        This is the balanced equation

                 

3 0
3 years ago
A homogeneous mixture is made by dissolving some salt in a beaker of water. The mixture is referred to as a
CaHeK987 [17]
In that case, the salt<span> would be the </span>solvent<span> and the </span>water<span> the </span><span>solute. 
So, it would be solution!

Have a nice day! :D</span>
3 0
3 years ago
Read 2 more answers
What are four ways to measure matter?
Cerrena [4.2K]

Answer:

C

The answer is C pleaaaaaaase

6 0
3 years ago
Other questions:
  • Select the correct answer.
    13·1 answer
  • What happens when you put on deodorant? does it absorb heat and give off thermal energy
    8·1 answer
  • Calculate the mass of 6.45 x 10^22 atoms of carbon​
    8·1 answer
  • In CaSO4, the oxidation number of Ca is<br> that of S is<br> and that of O is
    8·1 answer
  • I need help this one:(( please help me
    10·1 answer
  • I NEED HELP PLEASE !!!!!
    14·2 answers
  • Each period in the periodic table corresponds to a
    6·2 answers
  • An object has a mass of 20 g and a volume of 5 mL what is the objects density
    8·1 answer
  • When the absolute value of the difference in electronegativity of two adjacent atom in a compound is 1, they are most likely bon
    7·1 answer
  • What colors are absorbed Best Buy the plant gizmo
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!