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
alukav5142 [94]
3 years ago
9

A.Identify which of the following substances dissolve in water, explaining why for each example: CH4, He, MgSO4, NaHCO3

Chemistry
2 answers:
viva [34]3 years ago
7 0

Answer:

A) MgSO4 and NHCO3 will dissolve in water

B)C12H22O11,Na2SO4 and KCl will dissolve in water

CHCl3,CH4 and C2H6O will dissolve in gasoline

C2H6O will dissolve in both

Explanation:

There is a saying in chemistry that like dissolves like. Polar substances dissolve in polar solvents because they interact effectively with them. Non polar solutes also dissolve in nonpolar solvents.

Ionic substances such as Na2SO4,KCl will dissolve in water.

C12H22O11 contains polar groups which interact with water and lead to its dissolution. C2H6O could interact with water by hydrogen bonding via its OH group and can also dissolve in gasoline because it is an organic substance and volatile. CHCl3,CH4 are purely nonpolar substances which can only dissolve in gasoline.

Mars2501 [29]3 years ago
6 0

A. MgSO4 and NahCO3 are both ionic compounds and a salt so they are soluble

B.

1. Sucrose (C12H22O11) will dissolve in water

2.Na2SO4 will dissolve in water

3. KCl will dissolve in water

4. CHCI3 will dissolve gas

5. Methane (CH4) will dissolve in gas

6. C2H60 will be dissolved in both

The left side of the ethanol molecule has non-polar characteristics because of the C-C and C-H bonds which allows the alcohol to dissolve in a non-polar solvent and on the right side of the ethanol molecule we see an alcohol functional group (OH). This side of the molecule has polar characteristics which allow the molecule to be dissolved in a polar solvent such as water.

You might be interested in
AL
Helga [31]
Metallic I’m pretty sure. :)
4 0
3 years ago
A centimeter and millimeter differ from each other by a factor of _____ ?
Liono4ka [1.6K]



The answer is:  "10" .
_______________________________________________________________
  " A centimeter and millimeter differ from each other by a factor of "10" .
_______________________________________________________________
Note:
____________________________
100 cm = 1 m


1000 mm = 1m

____________
100 * (10) = 1000 .
_________________
The answer is:  "10".
__________________________________________________________
  " A centimeter and millimeter differ from each other by a factor of "10".
__________________________________________________________
7 0
3 years ago
Convert the following Celsius temperatures to the Kelvin scales
kotykmax [81]
What are the temperatures
5 0
3 years ago
A nuclear fission reaction has mass difference between the products and the reactants of 0.0284 amu. Calculate the
notsponge [240]

Answer:

C) 4.24 x 10^{-12}

Explanation:

E = Δmc^{2}

Δm = 0.0284 x 1.66 x 10^{-27} kg = 4.714x10^{-29}kg

putting value in above equation

E = 4.714x10^{-29}kg x (3x10^{8})^{2} = 4.24 x 10^{-12}

6 0
3 years ago
1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, at 298 K and 1 atm
sashaice [31]
1) Calculate the number of moles of O2 (g) in 300 cm^3 of gas at 298 k and 1 atm


Ideal gas equation: pV = nRT => n = pV / RT


R = 0.0821 atm*liter/K*mol

V = 300 cm^3 = 0.300 liter

T = 298 K

p = 1 atm


=> n = 1 atm * 0.300 liter / [ (0.0821 atm*liter /K*mol) * 298K] = 0.01226 mol


2) The reaction of a metal with O2(g) to form an ionic compound (with O2- ions) is of the type


X (+) + O2 (g) ---> X2O          or   


2 X(2+) + O2(g) ----> X2O2 = 2XO     or


4X(3+) + 3O2(g) ---> 2X2O3


 
In the first case, 1 mol of metal react with 1 mol of O2(g); in the second case, 2 moles of metal react with 1 mol of O2(g); in the third, 4 moles of X react with 3 moles of O2(g)



So, lets probe those 3 cases.


3) Case 1: 1 mol of metal X / 1 mol O2(g) = x moles / 0.01226 mol

=> x = 0.01226 moles of metal X


Now you can calculate the atomic mass of the hypotethical metal:

1.15 grams / 0.01226 mol = 93.8 g / mol


That does not correspond to any of the metal with valence 1+


So, now probe the case 2.



4) Case 2:


2moles X metal / 1 mol O2(g) = x / 0.01226 mol


=> x = 2 * 0.01226 = 0.02452 mol


And the atomic mass of the metal is: 1.15 g / 0.02452 mol = 46.9 g/mol


That is similar to the atomic mass of titanium which is 47.9 g / mol and whose valece is 2+.


4) Case 3


4 mol meta X / 3 mol O2 = x / 0.01226 => x = 0.01226 * 4 / 3 = 0.01635 


atomic mass = 1.15 g / 0.01635 mol = 70.33 g/mol


That does not correspond to any metal.


Conclusion: the identity of the metallic element could be titanium.
5 0
3 years ago
Other questions:
  • What would indicate that a physical change takes place when copper is drawn into wire
    8·2 answers
  • The number of moles of hydrogen that is needed to produce 0.253 mol of water is...
    10·1 answer
  • 1. The
    8·1 answer
  • There are two jars A and B containing food materials. Food in jar 'A' is picked with acetic acid while 'B' is not. food of which
    7·1 answer
  • Which of the following situations is most favorable for solubility? View Available Hint(s) Which of the following situations is
    6·2 answers
  • A student collects 629ml of oxygen at 0.500at, the student collected 0.0337 moles. At what temperature did the student collect t
    8·2 answers
  • In roses, the color red is dominant (R), and the color white is recessive (r). Based on the Punnett Square, what is the probabil
    14·1 answer
  • Please help me with this question please..
    7·1 answer
  • Help me please!
    14·1 answer
  • Why are cars manufactures exploring hydrogen fuel cell technology as a possiable replacement for gasoline burning engines
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!