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Stella [2.4K]
3 years ago
12

When an antifreeze like salt is used, the freezing point of a solution is lowered. The amount by which it is lowered is called t

he _____.
*freezing point depression
*boiling point elevation
*cooling point declension
*freezing point elevation
Chemistry
2 answers:
Ivan3 years ago
5 0
Freezing point depression.
Lena [83]3 years ago
5 0

Answer : The correct option is, freezing point depression

Explanation :

Depression in freezing point : The depression in freezing point is depends on the molarity of the solution that is the number of moles of solute dissolved in 1000 gram of the solvent. It does not depend on the mature of the solute.

When an antifreeze like salt is used, the freezing point of a solution is lowered. The amount by which it is lowered is called the freezing point depression.

Hence, the correct option is, freezing point depression

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An atom with high ionization energy will form a positive ion more easily than an atom with low ionization energy. True False
andrew11 [14]

The statement "An atom with high ionization energy will form a positive ion more easily than an atom with low ionization energy" is false.

In this context , we will define ionization energy as the minimum energy required to remove a valence electron from a neutral atom in it's gaseous state.  In a sense the ionization energy is a measure the amount of 'difficulty' of making something an ion. A high ionization energy means that it takes a lot of energy to remove a valence electron from that atom. A low ionization energy means that it is easy to remove a valence electron from the atom. It is known that group 1 elements generally have a low ionization energy.  On the other hand, it is harder for noble gasses and group 7 atoms to loose electrons because they have higher ionization energy.

To form a positive ion, you have to remove an electron. When an electron is removed from an atom, there ion formed has more positive charges than negative charges in it, making it net positive. We have established that atoms with low ionization energy loose elections much more easily. We have also established that atoms with high ionization energy do not loose electrons easily. From this we can gather that the statement is false. An atom with high ionization energy will not form a positive ion more easily that an atom with low ionization energy.

8 0
3 years ago
What changes occur at the molecular level when ice cream melts and forms a liquid?
Gemiola [76]
When ice cream melts from solid to liquid, the motion of the molecules increases. This is because as the phase change moves from solid to liquid to gas, entropy increases which increases the probability of the molecules to collide and move in the system. This increase may be because of the increase in temp, probable cause of the melting of icecream.
3 0
3 years ago
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2Li+2H2O—>2LiOH+H2
taurus [48]

Explanation:

2Li+2H2O—>2LiOH+H2

Calculate the mass of reacted lithium when H2 is 6.02 * 10 ^ 23 molecules.

I really need the answer with all the calculation please.

3 0
2 years ago
What class of compounds do fats belong to
NARA [144]
Fats are referred to as lipids, or cellular compounds that are insoluble in water.
7 0
3 years ago
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What is the approximate percent by mass of potassium in KHCO3?
lozanna [386]

Answer:

The mass percent of potassium is 39%

Option C is correct

Explanation:

Step 1: Data given

Atomic mass of K = 39.10 g/mol

Atomic mass of H = 1.01 g/mol

Atomic mass of C = 12.01 g/mol

Atomic mass of O = 16.0 g/mol

Step 2: Calculate molar mass of KHCO3

Molar mass KHCO3 = 39.10 + 12.01 + 1.01 + 3*16.0

Molar mass KHCO3 = 100.12 g/mol

Step 3: Calculate mass percent of potassium (K)

%K = (atomic mass of K / molar mass of KHCO3) * 100%

%K = (39.10 / 100.12) * 100%

%K = 39.05 %

The mass percent of potassium is 39%

Option C is correct

8 0
3 years ago
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