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
damaskus [11]
3 years ago
15

A compound is found to contain 9.224 % boron and 90.74 % chlorine by mass. To answer the question, enter the elements in the ord

er presented above. QUESTION 1: The empirical formula for this compound is . QUESTION 2: The molar mass for this compound is 117.2 g/mol. The molecular formula for this compound is .
Chemistry
1 answer:
motikmotik3 years ago
3 0

Answer:

Empirical formula of a compound means that it provides simplest ratio of whole number.

Explanation:

QUESTION-1

Given,

Mass of boron and chlorine is 9.224% and 90.74%

Then, Boron- 9.224×\frac{1}{10.811}=0.85 mol   (Mass value of boron=10.811)

      Chlorine- 90.74×\frac{1}{35.453}=2.559 mol.(Mass value of chlorine=35.453)

By dividing the mole value with smallest number, then we will get-

Boron-\frac{0.85}{0.68}=1

Chlorine-\frac{2.559}{0.68}=3

The empirical formula of the compound is -BCl₃

QUESTION-2

BCl₃⇄B+ 3.Cl  (Putting the actual mass number of boron and chlorine we will get-)

           1×(10.811)+ 3×(35.453)=117.17g/mol

Molecular formula=\frac{molar mass}{empirical formula}

                               = \frac{117.17}{117}≈1

  The molecular formula is same with the empirical formula.

You might be interested in
When 5ml of HCl was added
777dan777 [17]

Answer:

A. There was still 140 ml of volume available for the reaction

Explanation:

According to Avogadro's law, we have that equal volumes of all gases  contains equal number of molecules

According to the ideal gas law, we have;

The pressure exerted by a gas, P = n·R·T/V

Where;

n = The number of moles

T = The temperature of the gas

R = The universal gas constant

V = The volume of the gas

Therefore, given that the volumes and number of moles of the removed air and added HCl are the same, the pressure and therefore, the volume available for the reaction will remain the same

There will still be the same volume available for the reaction.

5 0
3 years ago
Which molecules is converted directly to acetyl CoA without the intermediate step of being converted first to pyruvate
Hitman42 [59]

Answer:

Fatty acids

Explanation:

Acetyl coA is a compound vital for the process of cellular respiration in the mitochondria. It is the starting material of the kreb's cycle or TCA cycle, which takes place in the mitochondria. During the metabolism of glucose (glycolysis), a molecule called PYRUVATE is first synthesized before becoming acetyl coA in the mitochondrion.

However, the metabolism of FATTY ACIDS (monomers of lipids) directly gives rise to acetyl coA without first becoming pyruvate. The fatty acids molecule undergo Beta- oxidation to produce acetyl coA, which enters the TCA cycle to continue cellular respiration.

6 0
3 years ago
How does thermal energy flow between a hot or cold pack and the atmosphere?
barxatty [35]

Answer:

Heat is the transfer of energy. During energy transfer, the energy moves from the hotter object to the colder object. This means that the hotter object will cool down and the colder object will warm up. The energy transfer will continue until both objects are at the same temperature.

Explanation:

7 0
3 years ago
Which statement correctly describes the actual yield and the theoretical yield of a reaction? (1 point)
Furkat [3]

Answer:

C: The actual yield depends on the reaction conditions, but the theoretical yield varies only with reactant amounts

Explanation:

Looking at the options, the correct one is Option C because the actual yield usually depends on the conditions of the reaction, while the theoretical yield usually varies with only the amount of reactant.

8 0
3 years ago
A reaction has ∆H = −356 kJ and ∆S = −36 J/K. Calculate ∆G (kJ) at 25°C.
Cloud [144]

Answer: -345.2 KJ

Explanation: As we know that ,dG=dH-TdS

T=25+273=298 K

dG= -356 x1000-298(-36)= -356000+10728

=-345272 j

= -345.2 KJ

5 0
3 years ago
Other questions:
  • Sprinters set in the starting blocks at the beginning of a race rely on what kind of energy conversion?
    12·1 answer
  • Most chemical reactions take place in labs true or false
    10·2 answers
  • What is the kinetic energy of a 10 kg object that has a velocity of 1.5 m/s
    14·2 answers
  • What is alchemy??????!
    11·2 answers
  • Why did Chief John Ross decided to sign a treaty with Albert Pike? A. The victory at Wilson’s Creek convinced Ross the Confedera
    11·2 answers
  • What is the formula for trihydrogen dioxide?
    14·1 answer
  • According to the following reaction, how many grams of carbon tetrachloride will be formed upon the complete reaction of 27.7 gr
    5·1 answer
  • Question 6 (1 point)
    11·1 answer
  • The diagram and data below represent gas and the conditions of pressure, volume, and temperature of the gas in a rigid cylinder
    9·1 answer
  • how many grams of the excess reactant are left over according to the reaction below given that you start with 10.0 g of al and 1
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!