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
Harman [31]
3 years ago
13

Which part of making a solution always releases energy?

Chemistry
1 answer:
emmainna [20.7K]3 years ago
4 0
<span>The part of making a solution that always releases energy is the overall change in forming the solution. The answer is letter D. Although letters A, B and C can be viable answers but, it is not always the case. There are some substances that when you mix or separate them requires more energy or less energy. An example would be w</span>hen the formation (or enthalpy of formation) of carbon dioxide is negative, it means that it releases heat to the surroundings. When it releases heat to the surroundings, the reaction is exothermic. Another example is when you mix baking soda and muriatic acid, the resulting mixture is colder. When it is cold, it means that the reaction is endothermic. So the best answer is letter D.
You might be interested in
A(n) ____ is an object, person, or other entity that is a potential risk of loss to an asset
agasfer [191]
A threat is a potential risk loss to an asset
6 0
3 years ago
Which of the following substances is formed deep under earth
EastWind [94]

Answer:

Oil

Explanation:

everything else is above the earth

6 0
2 years ago
An aqueous solution of a soluble compound (a nonelectrolyte) is prepared by dissolving 33.2 g of the compound in sufficient wate
stiv31 [10]

Answer:

2710.2g/mol

Explanation:

Step 1:

Data obtained from the question. This include the following:

van 't Hoff factor (i) = 1 (since the compound is non-electrolyte)

Mass of compound = 33.2g

Volume = 250mL

Osmotic pressure (Π) = 1.2 atm

Temperature (T) = 25ºC = 25ºC + 273 = 298K

Gas constant (R) = 0.0821 atm.L/Kmol

Molar mass of compound =.?

Step 2:

Determination of the molarity of the compound.

The molarity, M of the compound can be obtained as follow:

Π = iMRT

1.2 = 1 x M x 0.0821 x 298

Divide both side by 0.0821 x 298

M = 1.2 / (0.0821 x 298)

M = 0.049mol/L

Step 3:

Determination of the number of mole of compound in the solution. This can be obtain as follow:

Molarity = 0.049mol/L

Volume = 250mL = 250/1000 = 0.25L

Mole of compound =..?

Molarity = mole /Volume

0.049 = mole / 0.25

Cross multiply

Mole = 0.049 x 0.25

Mole of compound = 0.01225 mole.

Step 4:

Determination of the molar mass of the compound. This is illustrated below:

Mole of the compound = 0.01225 mole.

Mass of the compound = 33.2g

Molar mass of the compound =.?

Mole = Mass /Molar Mass

0.01225 = 33.2/Molar Mass

Cross multiply

0.01225 x molar mass = 33.2

Divide both side by 0.01225

Molar mass = 33.2/0.01225

Molar mass of the compound = 2710.2g/mol

Therefore, the molar mass of the compound is 2710.2g/mol

6 0
2 years ago
Carbon forms a great variety of stable compounds. Which of the following is not a reason for this variety?
katen-ka-za [31]

Answer:

D.

Explanation:

Carbon atoms are not strongly electronegative  and  tend to form  covalent bonds.

4 0
2 years ago
What mass of AI2O3 forms from 16 g O2 and excess AI?
vlada-n [284]

Answer:

2Al+1.5O2→Al2O3

Thus, 2 mol of Al combine with 1.5 mol of oxygen to form 1 mol of Al2O3.

2 mol of Al corresponds to 2×27=54 g.

Thus, the weight of Al used in the reaction is 54 g.

4 0
2 years ago
Other questions:
  • He following balanced equation shows the formation of water. 2H2 + O2 mc020-1.jpg 2H2O How many moles of oxygen (O2) are require
    6·2 answers
  • 3. A mass of 0.15 ounces is equal to how many grams?
    6·1 answer
  • Which statement describes the electron sea model for metallic bonding?
    8·2 answers
  • What is different about beaker 4 compared to beaker 1
    11·1 answer
  • Which statement is always true about a reversible chemical reaction?
    10·1 answer
  • Look at the diagram below. What type of nuclear decay is shown?
    8·1 answer
  • Why does electronegativity increase as you move from left to right across
    15·1 answer
  • Answer this correctly please...
    7·1 answer
  • Five difference between igneous rock and sedimentary rock.<br>​
    6·2 answers
  • Does someone know the combustion in a jacket potato???
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!