QUESTION 17 3.00 g Na2CO3 is dissolved in H2O and titrated with HCl. 28.0 mL of...

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QUESTION 17 3.00 g Na2CO3 is dissolved in H2O and titrated with HCl. 28.0 mL of...

QUESTION 17

3.00 g Na₂CO₃ is dissolved in H₂O and titrated with HCl.
28.0 mL of a HCl  solution were required to titrate the Na₂CO₃ solution. What is molarity of HCl solution?
Na₂CO₃(aq) + 2HCl(aq) --> 2NaCl(aq) +   H₂O(l) + CO₂(g)

1.88 molar

3.21 molar

0.0417 molar

9.37 molar

2.59 molar

0.123 molar

0.553 molar

2.02 molar

8 points

QUESTION 18

A metal object at 28.0 ^oC is heated by gaining 2.31 kJ of heat
from the environment.
The final Temp is 30.2 degrees C.
What is the Heat Capacity, C, of the metal ?

25.4 kJ/^oC

612 kJ/^oC

416 kJ/^oC

1.05 kJ/^oC

21.4 kJ/^oC

39.5 kJ/^oC

35.7 kJ/^oC

25.3 kJ/^oC

QUESTION 19

A 63.1 g piece of metal whose T = 73.8 ^oC is placed in a coffee cup calorimeter containing 155 g water. When the system reaches equilibrium, the water has changed from 19.20 ^oC to 23.40 ^oC. What is specific heat of metal? Density of water is 1.00 g/mL. Specific heat of H ₂O is 4.184 J/(g °C).

0.483 J/g ^oC

0.900 J/g ^oC

3.82 J/g ^oC

0.0150 J/g ^oC

0.237 J/g ^oC

0.856 J/g ^oC

3.53 J/g ^oC

0.981 J/g ^oC

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QUESTION 17 3.00 g Na2CO3 is dissolved in H2O and titrated with HCl. 28.0 mL of...

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QUESTION 17 3.00 g Na2CO3 is dissolved in H2O and titrated with HCl. 28.0 mL of...

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