Assuming that a sample of ethanol weighs 560 grams. What is the mass of hydrogen in grams for the sample?
1 answer:
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Complete Question
49.9 ml of a 0.00292 m stock solution of a certain dye is diluted to 1.00 L. the diluted solution has an absorbance of 0.600. what is the molar absorptivity coefficient of the dye
Answer:
The value is
Explanation:
From the question we are told that
The volume of the stock solution is
The concentration of the stock solution is
The volume of the diluted solution is
The absorbance is
Generally the from the titration equation we have that
=>
=>
Generally from Beer's law we have that
=>
Here l is the length who value is 1 cm because the unit of molar absorptivity coefficient of the dye is
So
=>
Answer : False, there will be two lithium and one oxygen atoms in a unit molecular structure of lithium oxide.
Explanation:
Electronic configuration of lithium is :
In order to attain stable electronic configuration it will loose an electron and form positively charge cation.
The electronic configuration of oxygen is:
Oxygen being second most electronegative atom requires two electrons to attain noble gas configuration stability and form negatively charge ion with 2- charge.:
When two atom of lithium and oxygen comes together , one electron from each lithium atom get transferred to an oxygen atom which results in formation of lithium oxide.