Most of these look like dilution questions which follow a general pattern;
<span>Use M1V1 = M2V2 (because moles in a solution stays constant if diluted) </span>
<span>so, the Concentration before * Volume before = Concentration after * Volume after </span>
<span>Using the first question as an example; 0.2*50 = 100 * M2 </span>
<span>Rearranging for M2: 0.1 </span>
<span>Therefore the concentration of the final solution is 0.1 M </span>
<span>we know that to work out pH you must use negative logs to base 10; i.e. -log(0.1) gives you the pH for this solution which is 1</span>
Answer:
Energy transfers to the metal from the water and calorimeter until they are all at room temperature.
Explanation:
i hope this helps
<u>Answer:</u> The partial pressure of hydrogen is 705.9 mmHg
<u>Explanation:</u>
Dalton's law of partial pressure states that the total pressure of the system is equal to the sum of partial pressure of each component present in it.
To calculate the partial pressure of hydrogen gas, we use the law given by Dalton, which is:
We are given:
Total pressure of the collection tube, = 729.8 mmHg
Vapor pressure of water, = 23.8 mmHg
Putting values in above equation, we get:
Hence, the partial pressure of hydrogen is 705.9 mmHg
Answer:
The answer to your question is: Molarity = 0.30
Explanation:
Data
V1 = 76 ml
C1 = 1.4 M
V2 = 208 ml
V3 = 104 ml
V water = 153 ml
Process
C1V1 = C2V2
C2 = C1V1/ V2
C2 = (1.4)(76) / 208
C2 = 0.51 M
Molarity = moles / volume
moles = Molarity x volume
moles = 0.51 x 0.208
moles = 0.11 Final volume = 0.208 + 0.153
Molarity = 0.11 / 0.361
Molarity = 0.30
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