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melomori [17]
3 years ago
15

Which response provides the best explanation as to why ionic compounds easily dissociate in water?

Chemistry
1 answer:
Stella [2.4K]3 years ago
4 0
Ionic compounds easily dissociate in water because H2O is a polar molecule. O atom has partial negative charge and H atom has a partial positive charge. When the substance is placed in H2O, the water molecules pull the positive and negative ions apart from each other ( to dissociate into separate ions ).
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A compound is 12.7% Al, 19.7% N, and 67.6% O. Determine its emperical formula.
gizmo_the_mogwai [7]

Answer:

AlN₃O₉

Explanation:

Assume that you have 100 g of the compound.

Then you have 12.7 g Al, 19.7 g N, and 67.6 g O.

1. Calculate the <em>moles</em> of each atom

Moles of Al = 12.7 × 1/26.98 = 0.4707 mol Al

Moles of N = 19.7 × 1/14.01    =  1.406   mol N

Moles of O = 67.6 × 1/16.00  = 4.225   mol O

2. Calculate the <em>molar ratios</em>.

Al: 0.4707/0.4707 = 1

N: 1.406/0.4707    = 2.987

O: 4.225/0.4707   = 8.976

3. Determine the <em>empirical formula</em>

Round off all numbers to the closest integer.

Al: 1

N: 3

O: 9

The empirical formula is AlN₃O₉.

3 0
4 years ago
Jill and Susan were absent when the instructions were given for the lab investigation. They gathered their materials and watched
MrRissso [65]
Jill and Susan violated safety procedures by not properly listening and/or reading over the instructions to know all the materials, steps, and equipment they need for the lab. Hope this helps!
6 0
3 years ago
Read 2 more answers
If 20.00 moles of KClO3 react, how many molecules of O2 will form?
Tanzania [10]

Answer:

Explanation:

2KClO₃ = 2KCl + 3O₂

2 moles of potassium chlorate gives 3 moles of oxygen gas

20 moles of potassium chlorate will give 30  moles of oxygen gas .

30 moles of oxygen = 30 x 6.02 x 10²³ molecules of oxygen .

= 180.6 x 10²³ molecules of O₂ .

6 0
3 years ago
Vreau si eu un referat la chimie despre Concentratia Procentuala
vaieri [72.5K]

Answer:

Explanation:

‍♀️‍♀️

3 0
3 years ago
Which statement describes the transfer of heat energy that occurs when an ice cube is added to an insulated container with 100 m
ICE Princess25 [194]
<span>The answer to this question would be: (3) The ice cube gains heat energy and the water loses heat energy.

Based on the law of conservation of energy, the energy in an isolated system should be constant. If something receives energy, other must be losing energy. The option 1 and 2  definitely false because the total energy is not constant.
In this case, the ice should have lower heat energy, so the ice should be the one who receives energy from the water</span>
4 0
3 years ago
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