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Lana71 [14]
3 years ago
7

How did john dalton explain a chemical reaction using his atomic theory?

Chemistry
1 answer:
Archy [21]3 years ago
7 0
Hi! Dalton said that the atoms of reactants are rearranged to form new substances as products.
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Assuming that all the energy given off in the reaction goes to heating up only the air in the house, determine the mass of metha
nirvana33 [79]

Answer:

0.92 kg

Explanation:

The volume occupied by the air is:

35.0m\times 35.0m \times 3.2m \times \frac{10^{3}L }{1m^{3} } =3.9 \times 10^{6} L

The moles of air are:

3.9 \times 10^{6} L \times \frac{1.00mol}{22.4L} =1.7 \times 10^{5}mol

The heat required to heat the air by 10.0 °C (or 10.0 K) is:

1.7 \times 10^{5}mol \times \frac{30J}{K.mol} \times 10.0 K = 5.1 \times 10^{7}J

Methane's heat of combustion is 55.5 MJ/kg. The mass of methane required to heat the air is:

5.1 \times 10^{7}J \times \frac{1kgCH_{4}}{55.5 \times 10^{6} J } =0.92kgCH_{4}

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3 years ago
Protons and neutrons are composed of what?<br> A electrons<br> B.quarks<br> C.ions<br> D.molecules
leonid [27]
B. Quarks is the answer.
6 0
2 years ago
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true or false, Valence bond theory states that a bond between two atoms is the strongest when the nuclei of the atoms are touchi
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Valence bond theory stating that a bond between two atoms is the strongest when the nuclei of the atoms are touching each other is true.

<h3>What is Valence bond theory?</h3>

This theory states that when two valence orbitals of two different atoms overlap on each other, the bond is usually strong.

The bond formed in this scenario is usually covalent which involves sharing of the valence electrons.

Read more about Valence bond theory here brainly.com/question/11625586

#SPJ1

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Consider four elements from Group 7A: fluorine in the second period, chlorine in the third period, bromine in the fourth period,
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<span>Out of the possible answers for this question, fluorine in the second period is correct. Of the four elements fluorine, chlorine, bromine and iodine, fluorine has the largest first ionization energy, with a Enthalpy number of 1681.0. Of all the elements, helium has the highest first ionization energy figure.</span>
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The absorbance of a garbanzo bean solution that had been diluted by a factor of three was 0.528. what was the concentration of t
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The Beer-Lambert law states that A = E*c*l where A is absorbance, E is the molar absorbance coeffecient, c is concentration and l is path length. Therefore the absorbance is directly proportional to concentration, and by increasing the concentration by a factor of 3, absorbance will increase by a factor of 3 giving   A = 1.584
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