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kap26 [50]
3 years ago
9

After transferring the electron, which ion is negatively charged? ________________ Why is the ion negatively charged? __________

________________________ Write the symbol for the negative ion: __________________________________-
Chemistry
1 answer:
pychu [463]3 years ago
7 0

After transferring an electron, the ion that lost an electron, assuming it was neutral before, would be a cation. The atom that gained an electron would be an anion.

The ion is negatively charged because it has gained an ion, adding a negative charge to the atom's neutral state. Because it has no protons to cancel the charge, it gains 1 negative charge, making it an anion.

The symbol for a negative ion would be (-) and a positive would be (+)

For example, when oxygen is an ion, here's how it would look: O2-

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Answer:

B

Explanation:

An exothermic reaction is one in which heat is liberated to the surrounding by a reaction.In this case,the enthalpy of the product is less than that of the reactant and such  a reaction has a negative enthalpy (ΔH).

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3 years ago
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A sample of copper absorbs 4.31E+1 kJ of heat, resulting in a temperature rise of 6.71E+1 °C. Determine the mass (in kg) of the
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Answer: 1.67 kg

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed=4.31\times 10^1kJ = 43100J   (1kJ=1000J)

m= mass of substance = ?

c = specific heat capacity = 0.385J/g^0C

Change in temperature ,\Delta T=T_f-T_i=6.71\times 10^1^0C=67.1^0C

Putting in the values, we get:

43100J=m\times 0.385J/g^0C\times 67.1^0C

m=1670g=1.67kg   (1kg=1000g)

Thus the mass (in kg) of the copper sample is 1.67

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The chemical equation of photosynthesis includes 6O2. What does the small number after the O represent?
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Lemur [1.5K]

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A) Stage 1: Chlorophyll captures light energy. Stage 2: Light energy is converted to chemical energy.

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