What is the net ionic charge of a calcium ion?

Chemistry

1 answer:

vaieri [72.5K]3 years ago

5 0

Answer:

Ca generally loses two electrons from its outer shell to form a Ca2+ ion.

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C) Ammonia is added to copper sulphate solution till excess?

satela [25.4K]

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Ammonia reacts with copper(II)ions to precipitate light blue copper hydroxide. Ammonia causes the copper ion to go back into the solution as a deep blue ammonia complex. The precipitate dissolves as we add an excess of ammonia.

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3 years ago

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Ganezh [65]

Answer:

The potential energy the apple had due to its height is converted to kinetic energy

Explanation:

When an apple falls from the tree to the ground, its <u>energy of position stored as gravitational potential energy is converted to kinetic energy</u>, the energy of motion, as it falls. When the apple hits the ground, kinetic energy is transformed into heat energy.

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dem82 [27]

Yes, I believe we would have fewer cases of infections. For example, the mosquito virus that was going around is more common in wetter areas because mosquitos are attracted to water.

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4 years ago

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Example of obtuse angle

marishachu [46]

Answer:

when the degree is less than 90

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3 years ago

During an exothermic reaction, ΔH for the reactants was 890 kJ/mol. Which of the following statements is correct about the ΔH fo

kaheart [24]

Answer:-A. It is less than 890 kJ/mol because the amount of energy required to break bonds is less than the amount of energy released in forming bonds.

Explanation: Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and $\Delta H$ for the reaction comes out to be positive.

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and $\Delta H$ for the reaction comes out to be negative.

In the formation of new bonds more energy is released than is required to break the existing bonds, heat is released.

In the formation of bonds less energy is released than is required to break the existing bonds, heat is absorbed.

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