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OlgaM077 [116]
3 years ago
8

How does a conductivity apparatus test whether a solution has ionic or covalent substances in it? It fails to light up except in

homogeneous solutions. It lights up when the leads touch each other. Ions complete the flow of electrons to form a circuit. The covalent substances bond to the leads to prevent the lightbulb from lighting.
Chemistry
2 answers:
larisa [96]3 years ago
7 0

Covalent compounds are those which are made up by sharing of electrons between them and the electronegativity of the elements which form covalent compounds are nearly same that is they are generally non-polar in nature whereas ionic compounds are formed by complete transfer of electrons from one element to the other and thus resulting in formation of ions of opposite charges that is cation (with positive charge) and anion (with negative charge). There is a large difference in electronegativity of the element involved in the formation of ionic compounds. They are held together by electrostatic force of attraction between them.

The conductivity of a substance is determined by the flow of electric charge. When the charged particles move that are present in the ionic compounds only in the  conductivity apparatus they complete the circuit by the flow of electrons.

Hence, a conductivity apparatus test whether a solution has ionic or covalent substances in it as ions complete the flow of electrons to form a circuit.

VladimirAG [237]3 years ago
6 0

Answer:

the answer is C

Explanation:

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andrey2020 [161]

It means that 22.5×10^5 J of heat is required to change 1 kg of water into steam.

Latent heat of vaporization is amount of energy required to change 1 gram (in this example 1 kilogram) of material from the liquid to the gaseous state at its boiling point.

Boiling point of the water is 100°C.

Joule (J) is the standard unit for energy (in this example heat).

Evaporization is phase change process in which the water changes from a liquid to a gas (water vapor). Fore example, solar radiation can be the source of energy for evaporation.

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2 years ago
Which of these is an indication that a chemical reaction has occurred?
Sergio039 [100]
D- If there is a color change that is indicative to that being a chemical change.

A, B, and C are examples of physical changes.
5 0
3 years ago
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Boiling point vs melting point
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The main difference between boiling point and melting point is that the melting point is defined as the temperature at which solid and liquid phases are in equilibrium, whereas the boiling point is the temperature at which the vapour pressure of a liquid is equal to the external pressure.

IamSugarBee

3 0
4 years ago
In the following reaction, how many moles of H2O are created when 7 moles of oxygen are consumed?
notka56 [123]

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C

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4 0
4 years ago
3 Cu + 8HNO3 g 3 Cu(NO3)2 + 2 NO + 4 H2O
liubo4ka [24]

24.25 moles of NO can be produced using 97 moles of HNO3.

<h3>What is balanced chemical equation?</h3>

Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations. Varied elements' atom counts in the reactants and products of unbalanced chemical equations are different.

3 Cu + 8HNO3 g → 3 Cu(NO3)2 + 2 NO + 4 H2O

The number of moles consumed can be calculated using comparing with coefficients in the balanced reaction .

So , from above eq we get that 8 moles of HNO3 are consumed to make 2 moles of NO.

⇒  8 HNO3⇔2 NO

⇒ 1 HNO3⇔ 1/4 NO

This means that for each mole of HNO3 produces 1/4 moles of NO.

So , for 97 moles of HNO3 , \frac{1}{4}  *97 moles of NO can be made,

So, total moles of NO made are 24.25 moles.

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2 years ago
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