Which lab equipment tool would you use to measure exactly 4 ml of water
1 answer:
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Answer: The number of moles of the weak acid in the solution is 0.00396
Explanation:
To calculate the number of moles for given molarity, we use the equation:
a)
The balanced chemical reaction is:
1 mole of base uses = 1 mole of
0.00396 moles of base use = moles of
Thus the number of moles of the weak acid in the solution is 0.00396
Answer:
85.5 mmHg is the pressure of the gas sample when the valve is opened.
Explanation:
The combined gas equation is,
where,
= initial pressure of gas in container A = 165 mmHg
= final pressure of gas = ?
= initial volume of gas in container A=
= final volume of gas = 135 mL + 117 mL = 252 mL
= initial temperature of gas in container A =
= final temperature of gas =
Now put all the given values in the above equation, we get:
85.5 mmHg is the pressure of the gas sample when the valve is opened.