Answer:
mmoles of potassium ion = 75.264 mmoles
mmoles of dichromate ion = 37.632 mmoles
Explanation:
Considering:-
For :
Molarity = 0.0840 M
Volume = 448 mL
The mmoles of are;-
In 1 mmole of , 2 mmoles of potassium ion and 1 mmole of dichromate ion is present.
In 37.632 mmole of , 2*37.632 mmoles of potassium ion and 1*37.632 mmole of dichromate ion is present.
<u>mmoles of potassium ion = 75.264 mmoles</u>
<u>mmoles of dichromate ion = 37.632 mmoles</u>
Answer:
Explanation:
Option B is the correct answer
10) Arsenic is a chemical agent which was used in preserving dead bodies in the past. It is mainly a formaldehyde mixture with coloring agents to give a dead body the look of life. Sylvester was a third mummy that was embalmed with arsenic in the late 1800s and is now on exhibit at Ye Olde Curiosity Shop in Seattle, Washington. His mummified body showed an extremely unusual since the remains weighed approximately 80 lbs when a body is composed of 70-80% water, after dehydration, the weight should be about 20-30% the premortem weight. The solution was also used during Civil War to preserve dead bodies <span>as the dead were being shipped home from the battlefield.
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9) R<span>esearch can yield dates when certain plants/animals became domesticated and entered the standard diets of people, meaning you would not see masses eating beef before the cow became domesticated. To further this you can look at when a specific food was introduced into the diets of people in the geographic area of the person you are studying. </span>
It is 10 times larger. 1 centigram = 10 miligrams, which means that it is 10 times larger.
Answer:
24dm³
Explanation:
Given parameters:
Mass of CO = 30g
Unknown:
Volume of CO at STP = ?
Solution:
To solve this problem, we need to find the number of moles of CO in the given mass.
Number of moles of CO =
Molar mass of CO = 12 + 16 = 28g/mol
Number of moles = = 1.07moles
Now;
1 mole of a gas occupies 22.4dm³ volume at STP
1.07moles will occupy 1.07 x 22.4 = 24dm³