Silver (ag) has a molar mass of 107.8682 g, nitrogen has a molar mass of 14.0067 g, and oxygen has a molar mass of 15.9994 g. wh
2 answers:
Answer : The molar mass of silver nitrate is, 169.87 g
Explanation :
Molar mass : It is defined as mass of 1 mole of a substance.
Given:
Molar mass of Sliver (Ag) = 107.8682 g
Molar mass of nitrogen (N) = 14.0067 g
Molar mass of oxygen (O) = 15.9994 g
Now we have to calculate the molar mass of silver nitrate
Molar mass of silver nitrate = Molar mass of Sliver (Ag) + Molar mass of nitrogen (N) + (3 × Molar mass of oxygen (O))
Molar mass of silver nitrate = 107.8682 g + 14.0067 g + 3(15.9994 g)
Molar mass of silver nitrate = 169.87 g
Therefore, the molar mass of silver nitrate is, 169.87 g
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Answer: The millimoles of sodium carbonate the chemist has added to the flask are 256
Explanation:
Molarity is defined as the number of moles dissolved per liter of the solution.
To calculate the number of moles for given molarity, we use the equation:
.....(1)
Molarity of solution = 1.42 M
Volume of solution = 180.0 mL
Putting values in equation 1, we get:
Thus the millimoles of sodium carbonate the chemist has added to the flask are 256.
Answer: All of the statements are true.
Explanation:
(a) Considering the system mentioned in the equation:-
The sum of total moles in the flask will always be equal to 1 which leads to confirmation of this statement as for 60 secs= 0.16 mol A and 0.84 mol B
(b) 0<t< 20s, mole A got reduced from 1 mole to 0.54 moles while at 40s to 60s A got decreased from 0.30 moles to 0.16 moles.
0 to 20s is 0.46 (1 - 0.54 = 0.46)mol whereas,
40 to 60s is 0.14 (0.30-.16 = 0.14) mol
(0.46 > 0.14) mol leading this statement to be true as well.
(c) Average rate from t1 = 40 to t2 = 60 s is given by:
which is true as well
Answer:
Mass of CuSO4.H2O obtained:
Explanation:
The molecular weight of the salt is:
<u>In the solution</u>: 12.5 g of CuSO4
In moles:
<u>Mass of wate</u>r:
5 moles of water per mol of salt:
Mass of CuSO4.H2O obtained: