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
snow_lady [41]
2 years ago
15

A compound is found to contain 25.24 % sulfur and 74.76 % fluorine by weight. The molecular weight for this compound is 254.14 g

/mol. What is the molecular formula for this compound
Chemistry
1 answer:
Savatey [412]2 years ago
4 0

Answer:

S_2F_{10}

Explanation:

Hello!

In this case, since the empirical formula of a chemical compound is determined by assuming the by-mass percentages are masses, we can firstly compute the moles of sulfur and fluorine based on their atomic masses:

n_S=25.24gS*\frac{1molS}{32.01gS}=0.789molS\\\\n_F=74.76gF*\frac{1molF}{19.00gF}=3.93molF

Next, we compute the subscript of each element in the formula by dividing each moles by the fewest moles:

S=\frac{0.789}{0.789}=1\\\\F=\frac{3.93}{0.789} =5

Whose molar mass is 127.01 g/mol. Now, we can compute the ratio between the molecular and empirical formulas as follows:

ratio=\frac{254.14}{127.01} =2

Thus, the molecular formula is:

S_2F_{10}

Regards!

You might be interested in
When you strike a match, what do you provide that enables the flame to appear?
Alexeev081 [22]

Explanation:

The minimum amount of energy required by a substance to begin a reaction is known as the activation energy.

Therefore, we can conclude that when you strike a match, you provide activation energy that enables the flame to appear.

Whereas a catalyst helps in increasing the rate of reaction but it does not start the reaction. On the other hand, when reactants combine together then we get products.

Thus, we can conclude that options (a), (b), (c), and (e) are not correct.

Hence, option (d) is the correct answer.

3 0
3 years ago
A homogeneous mixture of two or more substances is known as a
Illusion [34]
It is known as a Solution
3 0
3 years ago
Read 2 more answers
Consider the following chemical equilibrium: Now write an equation below that shows how to calculate from for this reaction at a
borishaifa [10]

Answer:

Kp=Kc *(RT)+-3

Explanation:

The relation between Kp and Kc is given below:

Where,

Kp is the pressure equilibrium constant

Kc is the molar equilibrium constant

R is gas constant , R = 0.082057 L atm.mol⁻¹K⁻¹

T is the temperature in Kelvins

Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)

For the first equilibrium reaction:

Δn = (0)-(2+1) = -3

Thus, Kp is:

Kp=Kc *(RT)+-3

6 0
2 years ago
Water enters a 4.00-m3 tank at a rate of 6.33 kg/s and is withdrawn at a rate of 3.25 kg/s. The tank is initially half full.
Naya [18.7K]

Explanation:

The given data is as follows.

            Volume of tank = 4 m^{3}

             Density of water = 1000 kg/m^{3}

Since, the tank is initially half-filled. Hence, the volume of water in the tank is calculated as follows.

                        \frac{1}{2} \times 4 = 2 m^{3}

Also, density of a substance is equal to its mass divided by its volume. Therefore, initially mass of water in the tank is as follows.

                    Mass = Density \times initial volume

                              = 1000 \times 2

                              = 2000 kg

Whereas mass of water in tank when it is full is as follows.

                     Mass = Density \times final volume

                               = 1000 \times 4

                               = 4000 kg

So, net mass of the fluid to be filled is as follows.

                  Net mass to be filled = Final mass - initial mass

                                                      = 4000 kg - 2000 kg

                                                      = 2000 kg

Mass flow rate (m_{in}) = 6.33 kg/s

Mass flow rate (m_{out}) = 3.25 kg/s

       Time needed to fill tank = \frac{\text{net mass to be filled}}{\text{net difference of flow rates}}

                                       = \frac{2000 kg}{m_{in} - m_{out}}

                                       = \frac{2000 kg}{6.33 kg/s - 3.25 kg/s}

                                       = 649.35 sec

Thus, we can conclude that 649.35 sec is taken by the tank to overflow.

5 0
3 years ago
The dissociation of a salt in water to from an aqueous solution is called enthalpy of solution, ΔHsoln. The ΔHsoln for CaCl2 is
Troyanec [42]

Answer:

A) the temperature of the water will increase.

Explanation:

Consider, first, the dissolution of anhydrous calcium chloride, CaCl2 in water. CaCl2 is a very water soluble ionic compound that, in solution, dissociates into the component ions, Ca2 + and Cl-, which interact strongly with water molecules.

The thermochemical equation that represents the process of dissolution of CaCl2 (s) indicates that it is a strongly exothermic process:

CaCl2(s) --> Ca+2(aq) + 2Cl- (aq)   ΔH = -82.8 kJ

Therefore, dissolving CaCl2 in water will produce the release of energy in the form of heat (82.8 kJ per mole of dissolved CaCl2)

5 0
3 years ago
Other questions:
  • Use the pop-up menus to label the following statements as either True of False.
    7·1 answer
  • Select the answer that CANNOT be used to fill in the blank in the following sentence:
    11·1 answer
  • 4. Cuál es la aplicación de las reacciones de óxido-reducción en la vida diaria y en la industria?
    9·1 answer
  • Calculate the molecular (formula) mass of each compound: (a) iron(ll) acetate tetrahydrate; (b) sulfur tetrachloride; (c) potass
    15·1 answer
  • I can't understand this I need it done by 4:20​
    8·1 answer
  • Calculate the concentration of formate in a 100mm solution of formic acid at ph 4.15. The pka for formic acid is 3.75
    6·1 answer
  • In what way do scientists think differently about rainbows than most people?
    8·2 answers
  • Chemical reaction for acrylic fiber (7th grade chemistry) pllllzzzzzz help ASAP.
    14·1 answer
  • I give brainliest
    13·2 answers
  • What are 5 examples of monosaccharides? What is also known as monosaccharide?​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!