What is the mass of potassium chloride when 6.75g of potassium reactants with an excess of chlorine gas the balanced chemical equation

Answers

Answer 1
Answer: 2K+Cl₂→2KCl
First you need to find the number of moles of potassium that is present in a 6.75g sample.  To do this you need to divide the mass of potassium (6.74g) by its molar mass (39.1g/mol) to get 0.172mol K.  Since we are told that the reaction happens with excess chlorine we know that potassium is the limiting reagent and we can therefore ignore chlorine gas and convert the moles of potassium straight to the moles of potassium chloride.  Since we know that 2 moles of potassium creates 2 moles of potassium chloride we can say that 0.172mol K turns into 0.172mol KCl since the molar ratio is 2/2 which can be thought of as 1.  The final step is to multiply 0.172mol KCl by its molar mass (74.55g/mol) to get 12.85g of potassium chloride.

I hope this helps.  Let me know in the comments if anything is unclear.

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The questions refer to the following graphs of mechanical waves. A
B
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The wave with the longest wavelength is (A,B,C). The wave with the smallest amplitude is (A,B,C). The wave with the most energy is (A,B,C).

Answers

A is the wave with the longest wavelength. The graph clearly shows this since wave A has a larger wavelength than waves B and C. Wave A has the longest wavelength when compared to the other two waves.

What is the C wave ?

C is the wave with the least amplitude. The graph shows this since wave C has a significantly lesser amplitude than waves A and B. Wave C has the least amplitude when compared to the other two waves. B is the most energetic wave.

The graph shows this because wave B has a larger amplitude than waves A and C. Wave B has the greatest amplitude when compared to the other two has the more energy in comparison to the two.

The longest wavelength wave has the lowest frequency and the lowest energy. A wave's wavelength is inversely related to its frequency, which implies that as the wavelength grows, so does the frequency. Because energy is proportional to frequency, the wave with the longest wavelength has the least energy.

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Do you have pictures of the graphs??

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Answers

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Express your answer as a chemical formula.

Answers

Butane is from the family of alkanes with –ane as its family name. The but- prefix stands for having four carbon atoms. The C4H10 is the general formula of butane and can also represent other forms or structures of butane. However if the question asks for the molecular formula of butane, think of how many electrons it can share to the hydrogen atom. The carbon atom can share 4 and hydrogen 1.  So if the three hydrogen atoms are attached to the first carbon, the other shared electron is attached to the second carbon. The second carbon atom can accommodate two hydrogen and 1 carbon. The third carbon can accommodate 2 hydrogen atoms and 1 carbon and the fourth carbon can accommodate 3 hydrogen atoms. The molecular formula is CH3-CH2-CH2-CH3.

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Answer is: hydroxyl group (-OH).

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Functional group for alcohol is hydroxyl group or hydroxy group (-OH).

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The atoms of functional groups are linked to each other and to the rest of the molecule with covalent bonds.

The functional group in Alcohol is the Hydroxyl group.

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Answers

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Which scientist invented a model of the atom that most closely resembles the modern electron cloud model?j.j. Thomson

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John Dlaton

Answers

Neil Bohr is the scientist who  invented a model of the atom that most closely resembles the modern electron cloud model.

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The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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The scientist that invented a model that shows the electron cloud is Neil Bohr.