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
Alja [10]
2 years ago
7

Molar mass of KAl(SO4)^2·12H2O

Chemistry
2 answers:
xeze [42]2 years ago
3 0

The molar mass is 477.09 g/mol.

To calculate the molar mass, let’s rewrite the formula as KAlS₂O₈H₂₄O₁₂.Then we can write:

   1 K  =   1 × 39.10  u =   39.10  u

   1 Al =   1 × 26.98 u =  29.68 u

  2 S  =  2 × 32.06 u =  64.12  u

  8 O =  8 × 16.00 u = 128.00 u

24 H = 24 × 1.008 u = 24.192 u

12 O = 12 × 16.00 u = <u>192.00  u </u>

                  <em>TOTAL </em>= 477.09 u

The molar mass is 477.09 g/mol.

Vika [28.1K]2 years ago
3 0

<u>Answer:</u> The molar mass of KAl(SO_4)_2.12H_2O is 474.23 g/mol

<u>Explanation:</u>

Molar mass is defined as the sum of the mass of all the atoms each multiplied its atomic masses that are present in the molecular formula of a compound. It is expressed in g/mol.

We know that:

Molar mass of potassium atom = 39.09 g/mol

Molar mass of aluminium atom = 26.98 g/mol

Molar mass of sulfur atom = 32.06 g/mol

Molar mass of oxygen atom = 15.99 g/mol

Molar mass of hydrogen atom = 1.01 g/mol

The chemical formula of the given compound is KAl(SO_4)_2.12H_2O

Molar mass of KAl(SO_4)_2.12H_2O=[(1\times 39.09)+(1\times 26.98)+2(32.06+(4\times 15.99))+12((2\times 1.01)+15.99)]=474.23g/mol

Hence, the molar mass of KAl(SO_4)_2.12H_2O is 474.23 g/mol

You might be interested in
Consider the followong balanced reaction. What mads in g of co2 can be formed from 288 mg of o2. Assume that there is excess c3h
Gwar [14]

<u>Answer:</u>

<em>0.264 g of CO_2 can be formed from 288 mg of O_2</em>

<u>Explanation:</u>

The balanced chemical equation is

2 C_3 H_7 OH+9 O_2> 6 CO_2+8 H_2 O

The conversions are  

Mass in mg O_2 is converted to mass in g O_2  

Mass in g O_2 is converted to moles O_2 by dividing with molar mass  

Moles O_2 is converted to moles CO_2  by using the mole ratio of O_2:CO_2 is 9 : 6

Moles CO_2  is converted to mass CO_2 by multiplying with molar mass CO_2

mass in mg O_2  > mass in g O_2 >moles O_2 > moles CO_2 > mass CO_2

288mg O_2 \times \frac{(1g O_2)}{(1000mg O_2 )} \times \frac {(1molO_2)}{(32gO_2 )}\times\frac {(6mol CO_2)}{(9mol O_2 )} \times \frac {(44.0 gCO_2)}{(1mol CO_2 )}

=0.264g (Answer)

7 0
3 years ago
What is the size of Neptune and the state of matter?
MakcuM [25]
<span>the size of Neptune is 15,299 mi, and is made up of ice
</span>
neptune is known as the "Ice Giant" Hope this helps, <span>Crazzyvibezz!</span>
4 0
3 years ago
The number of positive changes in the nucleus of an atom is equal to
raketka [301]

Answer:

The number of positive charges in nucleus of an atoms are equal to the atomic number and also positive charges are equal to the negative charges which are electrons in neutral atom.

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

Electron:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

Symbol= e⁻

Mass= 9.10938356×10⁻³¹ Kg

It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

Neutron and proton:

Neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.

Symbol of proton= P⁺

Symbol of neutron= n⁰

Mass of proton=1.672623×10⁻²⁷ Kg

Mass of neutron=1.674929×10⁻²⁷ Kg

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

For example

The carbon have six protons and six neutrons so its atomic mass is 12 amu and atomic number is six.

8 0
2 years ago
H2O2 is a polyatomic ion<br> ?
Bogdan [553]

Answer:

If you are meaning O2^2- ion, well, don’t forget that ions have a charge, that has to be specified when referring to them. It is a polyatomic ion just because it consists of more than one atom, irrespective of the fact that these atoms are of the same element or not. It was given that name because at the early times chemistry was founded as a science, it was found that with respect to other oxygenated substances, peroxides contained more oxygen than expected: Latin prefix per- gives the terms it is attached to the meaning of being increased, enhanced, and similar.

Explanation:

3 0
2 years ago
What elements comprise the largest portion of Earth's atmosphere?​
Mrrafil [7]

Answer:

Nitrogen and Oxygen make up 99% of the Earths atmosphere. Then Argon makes up the rest of the atmosphere.

3 0
2 years ago
Other questions:
  • Photosynthesis happens in the _____
    10·2 answers
  • Which of the following does not happen during a chemical change?
    10·1 answer
  • How many moles of Pb(NO3)2 are required if 8 moles of PbCl2 are produced
    12·1 answer
  • How much garbage does a average American generate?
    9·1 answer
  • Indicate which of the following criteria are important for the selection of a buffer to use in an in vitro biochemical reaction.
    11·1 answer
  • How often does the tip of and hour hand on a clock have the same velocity?
    5·1 answer
  • How does the ocean current affect the air temperature in japan.
    10·1 answer
  • Plzzz help pls How many liters are in 6.74 x 1023 particles of PbCl2?
    5·1 answer
  • How many grams are in 3.45 moles CO2
    14·1 answer
  • This question is about salts.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!