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almond37 [142]
3 years ago
15

The reason salt crystals, such as kcl, hold together so well is because the cations are strongly attracted to

Chemistry
2 answers:
Lynna [10]3 years ago
5 0
<span>The answer is anions. Cations are positively-charged ions (in this case K+) while anions are negatively-charged ions (in this case Cl-). The ions attract each other  through electrostatic charges and arrange themselves in an ordered fashion to form a lattice</span>




Anna007 [38]3 years ago
3 0

Explanation:

A bond formed due to the transfer of electrons is known as an ionic bond.

For example, KCl is an ionic compound and due to the difference in electronegativity potassium has partial positive charge and chlorine have partial negative charge.

Also, it is known that opposite charges attract each other. So, cations have positive charge and anions have negative charge.

Thus, we can conclude that the reason salt crystals, such as kcl, hold together so well is because the cations are strongly attracted to anions.

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When was copper discovered?​
Vesna [10]

Answer:

9000 BC

Explanation:

Although various copper tools and decorative items dating back as early as 9000 BCE have been discovered, archaeological evidence suggests that it was the early Mesopotamians who, around 5000 to 6000 years ago, were the first to fully harness the ability to extract and work with copper.

3 0
3 years ago
The nearest star to the earth is Proxima Centuri. It is 4x1016 meters from New York City. The distance to Perth on the exact
Travka [436]

Answer:

Proxima Centuri is 9 orders of magnitude further from New York compared to Perth

Explanation:

Distance of Proxima Centuri to New York = 4 × 10^16 meters

Distance of Proxima Centuri to Perth = 11000 miles

Since 1 mile = 1609 meters, distance to Perth in meters = 11000 × 1609

Distance to Perth = 17699000 = 1.7699 × 10^7 meters

Order of magnitude of the distances of Proxima Centuri to New York and Perth = 10^16/10^7

Order of magnitude = 10^9

Therefore, Proxima Centuri is 9 orders of magnitude further from New York compared to Perth.

3 0
3 years ago
The law of the conservation of mass states that the total mass before and after a
ehidna [41]

Answer:

<u>reaction are equal.</u>

Explanation:

The law of the conservation of mass states that the total mass before and after a reaction are equal.

In a reaction, the mass of the reactants are always equal to the mass of the products. Nothing ever disappears from the equation, although substances may become gas and "disappear" the air.

6 0
4 years ago
2. Use the graph below to answer the following questions.
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Answer:

The graph represents an endothermic reaction.

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80kJ

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80kJ

160kJ

6 0
2 years ago
How many moles are in 187.54 grams of magnesium chlorate?
Svetlanka [38]

Hey there!

Magnesium chlorate: Mg(ClO₃)₂

Find molar mass.

Mg: 1 x 24.305 = 24.305

Cl: 2 x 35.453 = 70.906

O: 6 x 16 = 96

------------------------------------

                      191.211 g/mol

We have 187.54 grams.

187.54 ÷ 191.211 = 0.9808

There are 0.9808 moles in 187.54 grams of magnesium chlorate.

Hope this helps!

3 0
4 years ago
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