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Olin [163]
3 years ago
12

7. A solution containing 90grams of KNO3 per 100. grams of H2O at

Chemistry
1 answer:
Tomtit [17]3 years ago
5 0

Answer:

(4) concentrated and supersaturated

Explanation:

At 50.°C, 90g of KNO3 lies above the solubility curve [on the Regents Reference Table G]. This indicates that the solution is supersaturated, meaning it contains more solute than will naturally dissolve, and was formed when a saturated solution cooled. Furthermore, the percent concentration of this solution is 90% KNO3 making this solution concentrated. This can be calculated using the formula for mass percent concentration.

Percent Mass = <u>Mass of Solute (g)</u> x 100

                         Mass of Solution (g)

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Lattice energy is ____.
Citrus2011 [14]

Answer:

(B) the energy required to break apart one mole of an ionic compound into its gaseous ions

Explanation:

Lattice energy is the energy that would be obtained from the formation of an ionic compound from its gaseous ions. Therefore, the reverse process that responds the question would be the energy required to break apart an ionic compound and convert its component atoms into gaseous ions.

Lattice energy provides a measure of the stability of an ionic compound. When the ions bind to form the crystalline structure, heat (energy) is released. To break the ionic compound into the ions that form it, it is necessary to provide an energy equal to that released when formed, i.e. the lattice energy.

3 0
4 years ago
What would a general formula of an acid always start with? What does the general formula of an acid have to end with? Where woul
NeTakaya
A general formula of an acid always start with H or the hydronium ion. It has to end with an anion. As acids, these compounds are named starting with the prefix "hydro-," then adding the first syllable of the anion, then the suffix "-ic." Hope this answers the question.
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6 0
4 years ago
Read 2 more answers
14. What is the total number of kilojoules of heat needed to change 150. G of
Nadusha1986 [10]

Answer:

\boxed {\boxed {\sf 50.1 \ kJ}}

Explanation:

When water changes from ice (solid) to water (liquid), it is melting or fusion. Therefore, we can use the following formula to find energy:

q=mH_f

where <em>q</em> is the energy, <em>m </em>is the mass, and <em>Hf</em> is the heat of fusion.

1. Define Values

The mass is 150 grams. The heat of fusion for water is 334 Joules per gram.

m= 150 \ g \\H_f=334 \ J/g

2. Calculate Energy

Substitute the values into the formula.

q=150 \ g * 334 \ J/g

Multiply. Note that the grams (g) will cancel each other out and leave Joules as our units.

q=150 *334 \ J

q=50100 \ J

3. Convert Units

We found the answer in joules, but the question asks for kilojoules, so we must convert.

There are 1000 Joules in 1 kilojoule. Therefore, we can divide the joules calculated by 1000.

50100 \ J *\frac{1 \ kJ}{1000 \ J}

\frac{50100 \ kJ}{1000 \ }

50.1 \ kJ

<u>50.1 kilojoules </u>are needed to change 150 grams of ice to water.

8 0
3 years ago
What is the strongest type of intermolecular force between solute and solvent in each solution?
Elenna [48]

Hydrogen bonding is the strongest type of intermolecular force between solute and solvent.

<h3>What is Intermolecular Force ?</h3>

Intermolecular force is also called secondary force is the force of attraction between molecules. It acts between ions and atoms.

<h3>What is Hydrogen Bonding ?</h3>

Hydrogen bond is the attractive forces which binds the hydrogen atom of 1 molecule with electronegative atom of other molecule.

CH₃OCH₃ form hydrogen bonding and H₂O can also form hydrogen bonding.

Thus from the above conclusion we can say that Hydrogen bonding is the strongest type of intermolecular force between solute and solvent.

Learn more about the Hydrogen Bonding here: brainly.com/question/1420470

#SPJ4

5 0
2 years ago
Perform the following
vivado [14]
The correct number of significant figures and digits is 3
5 0
3 years ago
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