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
yaroslaw [1]
2 years ago
5

Care to help me guys please​

Chemistry
1 answer:
earnstyle [38]2 years ago
7 0

Answer:

A. Na₂SO₄ and HCl

C. Polar solutes are soluble in polar solvents but are insoluble in non-polar solvents Non-polar solutes are insoluble in polar solvents but are are soluble in non-polar solvents

Ionic solutes are soluble in polar solvents but are insoluble in non-polar solvents.

Like dissolves like simply means that molecules of substances having similar chemical properties dissolve in each other

Explanation:

A. Ionic substances like Na₂SO₄ are composed of charged particles called ions. These ions are either positively charged or negatively charged, therefore, they are attracted to substances of opposite charges. Also, polar molecules like HCl contains two oppositely charged ends. A polar solvent consists of molecules with two oppositely charged ends, therefore, ionic substances as well polar substances dissolve in them according to the concept of like dissolves like.

Gasoline being non-polar will only dissolve in like substances, polar solvents.

C. Polar solutes are soluble in polar solvents but are insoluble in non-polar solvents Non-polar solutes are insoluble in polar solvents but are are soluble in non-polar solvents

Ionic solutes are soluble in polar solvents but are insoluble in non-polar solvents.

The statement "Like dissolves like" simply means that molecules of substances having similar chemical properties dissolve in each other. For example gasoline, a non-polar substance will dissolve only in a non-polar solvent like kerosene. Also, HCl, a polar molecule will dissolve in a polar solvent like water.

You might be interested in
Calculate the enthalpy change, ∆H in kJ, for the reaction H2O(s) → H2(g) + 1/2O2(g). Use the following information: : +279.9 kJ
Len [333]

Answer:

+ 291.9 kJ

Solution:

The equation given is as;

H₂O ₍s₎ → H₂ ₍g₎ + 1/2 O₂ ₍g₎ ΔH = ?

First, as we know the heat of formation of H₂O ₍l₎ is,

H₂ ₍g₎ + 1/2 O₂ ₍g₎ → H₂O ₍l₎ ΔH = - 285.9 kJ

Now, reversing the equation will reverse the sign of heat as,

H₂O ₍l₎ → H₂ ₍g₎ + 1/2 O₂ ₍g₎ ΔH = + 285.9 kJ

Also, we know that,

H₂O ₍s₎ → H₂O ₍l) ΔH = + 6.0 kJ

Now, adding last two equations,

H₂O ₍l₎ → H₂ ₍g₎ + 1/2 O₂ ₍g₎ ΔH = + 285.9 kJ

H₂O ₍s₎ → H₂O ₍l) ΔH = + 6.0 kJ

-----------------------------------------------------------------------------

H₂O ₍s₎ → H₂ ₍g₎ + 1/2 O₂ ₍g₎ ΔH = + 291.9 kJ

5 0
3 years ago
The town in the video stressed using locally made goods instead of imported goods. How could using locally made goods lower CO2
ladessa [460]

Answer:

It reduces the need to import goods

Explanation:

When you buy locally, the products you buy don't come from far away, so they don't have to cross the country (or the ocean) by boat, plane or trucks to reach the market/store where you're buying, at least not from a long distance away.

The distance a vehicle travels, the less CO2 emissions it produces.

If the good you're buying is made/produced only an hour away, that's not much pollution produced compared as if the good has to come from a distant place spending days on highways to reach you.

6 0
3 years ago
H2O (s) ⇒ H2O What would be the best argument against writing this in the form of a chemical equation?
Goshia [24]

Answer: Since this is merely a Physical Change, it is improper to write it as a chemical equation.

5 0
3 years ago
Of the concentration units below, only ________ uses kg of solvent in its calculation.
oksano4ka [1.4K]

Answer:

E) molality

Explanation:

Molality -

Molarity of a substance , is the number of moles present in a Kg of solvent .

Hence , the formula for molality is given as follow -

m = n / s

m = molality

s = mass of solvent in Kg ,

n = moles of solute ,

Hence , from the given information of the question,

The concentration unit which have Kg of solvent , is molality.

6 0
3 years ago
What is something that has mass and takes up space
Leni [432]
Humans.
Humans have mass and take up space. :)

Hope this helps!
5 0
3 years ago
Read 2 more answers
Other questions:
  • Main ingredients of plastic bags and natural resources used please
    8·1 answer
  • What is the half life of an isotope that is 75% decayed after 16 days?
    13·1 answer
  • One year is the amount of time it takes Earth to ____________. A. complete one rotation B. complete one revolution C. complete 5
    6·2 answers
  • Can anyone check my work and see if it is correct? If not, may someone help me?
    11·1 answer
  • Describe how you can prove that a bicycle is matter
    7·1 answer
  • Which planet is the smallest and the closest to the Sun?
    12·2 answers
  • In Chef’s famous Beef Wellington, you have to get the pastry just right. According to the recipe, Chef uses 400g of butter. But
    5·1 answer
  • According to the conveyor belt mode of ocean circulation, what happens when water reaches the poles
    13·2 answers
  • Choose all the answers that apply.
    11·2 answers
  • _____ Ca(NO3)2 + _____ Fe → _____ Fe(NO3)3 + _____ Ca I need this done quick and fast Balancing chemical equations
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!