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3 years ago

Carbon's valence is _____. covalent ionic +4 -4

Chemistry

2 answers:

Morgarella [4.7K]3 years ago

7 0

Answer : +4

Explanation : Carbon's valency is +4.

Valency is defined as the combining or giving away power for required electrons of any element, especially it is measured by the number of hydrogen atoms which can be displaced or combined with.

In carbon which has 6 electrons in its atom. In first shell has 2 electrons and in the second shell 4 electrons are accommodated. It can either donate or accept 4 electrons in its valence shell. Most commonly the valency is +4.

AleksandrR [38]3 years ago

3 0

Answer:

Carbon's valency is +4.

Explanation:

Valency is defined as the combining or giving away power for required electrons of any element, especially it is measured by the number of hydrogen atoms that can be displaced or combined with.

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One mole of copper equals about how many atoms?

Arlecino [84]

One mole of copper equals 6.02 × 10^23 atoms. The answer is letter C. This follows the Avogaro’s law wherein 1 mole of a substance is equal to 6.02 x 10^23 atoms, formula units or molecules. This is applicable to all substances.

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3 years ago

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A reduction reaction involves either the addition of hydrogen or removal of:

Marina CMI [18]

Reduction involves the either the addition of hydrogen and removal of oxygen.

<h3>What is reduction?</h3>

Reduction involves the removal of oxygen.

This implies there is a loss of oxygen in reduction.

This can be represented in the extraction of iron from it ores.

Fe₂O₃ + 3CO → 2Fe + 3CO₂

Reduction is also the addition of hydrogen. This implies it is the gain of hydrogen.

For example

CH₃CHO → CH₃CH₂OH

learn more on reduction here: brainly.com/question/9485345

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2 years ago

The average propane cylinder for a residential grill holds approximately 18 kg of propane. How much energy (in kJ) is released b

brilliants [131]

Combustion is a chemical reaction between a fuel and an oxidant, oxygen, to give off combustion products and heat. Complete combustion results when all of the fuel is consumed to form carbon dioxide and water, as in the case of a hydrocarbon fuel. Incomplete combustion results when insufficient oxygen reacts with the fuel, forming soot and carbon monoxide.

The complete combustion of propane proceeds through the following reaction:
$C_{3} H_{8}$ + $5O_{2}$ --> $3CO_{2}$ + $4H_{2}O$

Combustion is an exothermic reaction, which means that it gives off heat as the reaction proceeds. For the complete combustion of propane, the heat of combustion is (-)2220 kJ/mole, where the minus sign indicates that the reaction is exothermic.

The molar mass of propane is 44.1 grams/mole. Using this value, the number of moles propane to be burned can be determined from the mass of propane given. Afterwards, this number of moles is multiplied by the heat of combustion to give the total heat produced from the reaction of the given mass of propane.

14.50 kg propane x <u> 1000 g </u> x <u> 1 mole propane </u> x <u> 2220 kJ </u>
1 kg 44.1 g 1 mole

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3 years ago

PLS I NEED HELP!! Lucia wants to arrange the four states of matter from lowest kinetic energy to highest kinetic energy. How sho

masya89 [10]

Answer:

Basically, the more hot the state is, the more kinetic energy it will have. This means that answer D. would be right, as it goes from coldest to hottest states!

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3 years ago

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.<br> How many moles are there in 8.5 x 1024 molecules of sodium sulfate, Na2SO4?

NeTakaya

Answer: To solve this question, we need to use the Avogadro's Number, which is a constant first discovered by Amadeo Avogadro, an Italian scientist. He discovered that in a mole of a substance, there are 6,02*10²³ molecules. Using this relationship, we apply the following conversion factor:

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Explanation:

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3 years ago