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
trasher [3.6K]
3 years ago
14

You have ice cubes in your freezer at home. The ice cubes melt into water. This type of change is called a... O a. nuclear chang

e O b.physical change O c. chemical change
Chemistry
1 answer:
blagie [28]3 years ago
3 0
B ) its a physical change
You might be interested in
What is the ratio of [a–]/[ha] at ph 2.75? the pka of formic acid (methanoic acid, h–cooh) is 3.75?
Varvara68 [4.7K]

The dissociation of formic acid is:

HCOOH \rightleftharpoons HCOO^{-} + H^{+}

The acid dissociation constant of formic acid, k_a is:

k_a = \frac{[HCOO^{-}]  [H^{+}]}{HCOOH}

Rearranging the equation:

\frac{[HCOO^{-}]}{[HCOOH]} = \frac{k_a}{[H_+]}

pH = 2.75

pH = -log[H^{+}]

[H^{+}]= 10^{-2.75} = 1.78 \times 10^{-3}

pk_a = 3.75

k_a = 10^{-3.75} = 1.78\times 10^{-4}

Substituting the values in the equation:

\frac{[HCOO^{-}]}{[HCOOH]} = \frac{k_a}{[H_+]}

\frac{[HCOO^{-}]}{[HCOOH]} = \frac{1.78\times 10^{-4}}{1.78\times 10^{-3}}

Hence, the ratio is \frac{1}{10}.

4 0
3 years ago
A voltaic cell is constructed from an Ni2+(aq)−Ni(s)Ni2+(aq)−Ni(s) half-cell and an Ag+(aq)−Ag(s)Ag+(aq)−Ag(s) half-cell. The in
eduard

Answer:

+1.03 V

Explanation:

The standard emf of the voltaic cell is the value of the standard potential of it, which is calculated by the standard reduction potential (E°).

The standard reduction potential is the potential needed for the reduction reaction happen, and it's determined by the reaction with the hydrogen cell (which has E° = 0.0V). The half-reactions of reduction of Ni⁺² and Ag⁺, are:

Ni⁺²(aq) + 2e⁻ → Ni(s) E° = -0.23 V

Ag⁺(aq) + e⁻ → Ag(s) E° = +0.80 V

The value is calculated by a spontaneous reaction, in which the cell with the greater E° is reduced (gain electrons), and the other is oxidized (loses electrons). So, Ag⁺ reduces.

emf = E°reduces - E°oxides

emf = 0.80 - (-0.23)

emf = +1.03 V

8 0
3 years ago
Isn't gelatin just edible slime
weqwewe [10]

Answer:

Huh?

Explanation:

am confused as u lol

tx for free points

8 0
2 years ago
Read 2 more answers
Coefficients of the correct balanced equation for the reaction, CaCl2 + AgNO3 ⟶ AgCl + Ca(NO3)2.
mote1985 [20]

Answer:

CaCl2 + 2 AgNO3 ---> 2 AgCl + Ca(NO3)2

6 0
3 years ago
In which instance is a gas most likely to behave as an ideal gas?A.) At low temperatures, because the molecules are always far a
kiruha [24]

Answer:

C.) At room temperature and pressure, because intermolecular interactions are minimized and the particles are relatively far apart.

Explanation:

For gas to behave as an ideal gas there are 2 basic assumptions:

  • The intermolecular forces (IMF) are neglectable.
  • The volume of the gas is neglectable in comparison with the volume of the container.

<em>In which instance is a gas most likely to behave as an ideal gas?</em>

<em>A.) At low temperatures, because the molecules are always far apart.</em> FALSE. At low temperatures, molecules are closer and IMF are more appreciable.

<em>B.) When the molecules are highly polar, because IMF are more likely.</em> FALSE. When IMF are stronger the gas does not behave as an ideal gas.

<em>C.) At room temperature and pressure, because intermolecular interactions are minimized and the particles are relatively far apart.</em> TRUE.

<em>D.) At high pressures, because the distance between molecules is likely to be small in relation to the size of the molecules.</em> FALSE. At high pressures, the distance between molecules is small and IMF are strong.

3 0
3 years ago
Other questions:
  • What is the melting point of a solution in which 3.5 grams of sodium chloride is added to 230 mL of water?
    11·2 answers
  • Which term names enzymes in the body that speed up chemical reactions? A. catalysts B. cells C. concentrations D. chloroplasts
    11·2 answers
  • What is the approximate tilt of the earth?<br> 18°<br> 23°<br> 45°<br> 60°
    5·2 answers
  • Balance this compound
    7·2 answers
  • Which of the following can be mixed in solution with NH2 to make a buffer?
    15·2 answers
  • 4. Which of these are environmental costs of using
    10·1 answer
  • An object has a mass of 48g and it has a height of 5cm, a width of 2cm and a length of 5cm.
    6·1 answer
  • I’ll mark you brainley if you help me figure out which answer it is!!!
    14·1 answer
  • The pH of a solution can be calculated using which formula?
    10·1 answer
  • Which describes the oxidizing agent in a chemical reaction?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!