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
vekshin1
3 years ago
13

what is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g​

Chemistry
1 answer:
LekaFEV [45]3 years ago
4 0

Answer:

K8S4O16 or K8(SO4)4 depending on if the SO4 is supposed to represent sulfate or not

Explanation:

Find the molar mass of K2SO4 first:

2K + S + 4O ≈ 174 g/mol

Divide the goal molar mass of 696 by the molar mass of the empirical formula:

696 / 174 = 4

This means you need to multiply everything in the empirical formula by 4:

K2SO4 --> K8S4O16 or K8(SO4)4 depending on if the SO4 is for sulfate or not

You might be interested in
Sulfur trioxide, so3, is made industrially in enormous quantities by combining oxygen and sulfur dioxide, so2. what amount (mole
DedPeter [7]

The answer is 37.5 moles

The explanation:

1- when we have the mass of SO3 in Kg so, first we have to convert it to grams:

mass = 3 * 1000 = 3000 g

2- we need to get the molar mass of SO3 :

molar mass of SO3 = 32 + (16*3)

= 80 g/mol

3- then we can use this formula to get number of moles:

moles = mass / molar mass

= 3000 g / 80 g/mol

= 37.5 moles

6 0
3 years ago
The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is -5084.1 kj . f the change in e
TEA [102]

<u>Given:</u>

Change in internal energy = ΔU = -5084.1 kJ

Change in enthalpy = ΔH = -5074.3 kJ

<u>To determine:</u>

The work done, W

<u>Explanation:</u>

Based on the first law of thermodynamics,

ΔH = ΔU + PΔV

the work done by a gas is given as:

W = -PΔV

Therefore:

ΔH = ΔU - W

W = ΔU-ΔH = -5084.1 -(-5074.3) = -9.8 kJ

Ans: Work done is -9.8 kJ


6 0
3 years ago
Help asap <br><br> i have to get a good grade on this
baherus [9]
I think The answer is 34.5l
4 0
3 years ago
Write about an object's motion in your own words.
arlik [135]

Answer:

An objects motion is called kinetic energy.  Which is energy that is cause by movement or motion

Explanation:

8 0
3 years ago
Read 2 more answers
Write balanced equations for the following reactions
Arte-miy333 [17]

Answer:

See explanation

Explanation:

The shorthand nuclear reaction equations have been given; the first particle in the parentheses is a reactant particle while the second particle is a product particle. These can now be rewritten as the longhand equations as follows;

238/92U + 4/2 He -------> 241/94Pu + 1/0 n

238/92U + 4/2 He ------> 241/94Pu + 1/0 n

14/7N + 4/2 He------> 17/8O + 1/1 p

56/26Fe + 2 4/2 He----> 60/29Cu + 4/2 He

4 0
3 years ago
Other questions:
  • 16.34 g of CuSO4 dissolved in water giving out 55.51 kJ and 25.17 g CuSO4•5H2O absorbs 95.31 kJ. From the following reaction cyc
    10·1 answer
  • when you use the terms heavier or lighter to compare different objects with the same volume, what property of the objects are yo
    8·1 answer
  • Why does a solution of acid and sodium thiosulfate go cloudy
    8·1 answer
  • How many electrons would be transferred in either a voltaic or electrolytic cell that uses the following half reactions
    13·1 answer
  • The chemical hazard label indicates the class of hazard. It uses three major color-coded categories: Health (yellow), Flammabili
    9·1 answer
  • Provide at least three reasons why friction is needed.
    9·2 answers
  • Many tall buildings have a
    9·1 answer
  • How many joules of heat are lost when 150.0 g of steam are cooled from 124. C to 86 C?
    14·1 answer
  • Actual Value = -273 Experimental Value = -274 calculate the percent error of your value for absolute zero (in Celsius) Percent e
    15·1 answer
  • Why is copper used to make hot water tanks not steel.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!