X=240 g NaCl salt dissolves in solution.
Example: If we add 68 g sugar and 272 g water to 160 g solution having concentration 20 %, find final concentration of this solution.
Solution:
Mass of solution is 160 g before addition sugar and water.
100 g solution includes 20 g sugar
160 g solution includes X g sugar
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X=32 g sugar
Mass of solute after addition=32 + 68=100 g sugar
Mass of solution after addition=272 +68 + 160=500 g
500 g solution includes 100 g sugar
100 g solution includes X g sugar
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X= 20 % is concentration of final solution.
Answer:
209.3 Joules require to raise the temperature from 10 °C to 15 °C.
Explanation:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m × c × ΔT
Given data:
mass of water = 10 g
initial temperature T1= 10 °C
final temperature T2= 15 °C
temperature change =ΔT= T2-T1 = 15°C - 10°C = 5 °C
Energy or joules added to increase the temperature Q = ?
Solution:
We know that specific heat of water is 4.186 J/g .°C
Q = m × c × ΔT
Q = 10 g × 4.186 J/g .°C × 5 °C
Q = 209.3 J
<h3>
Answer:</h3>
The rate of sea level change is the fastest
<h3>
Explanation:</h3>
To determine the process which is the fastest we need to determine the rate at which each occurs in meters per year.
Rate of sea level changes is 10 m per 1,000 years
Therefore, the rate of sea level change = 10 m ÷ 1000 years
= 0.01 m/yr
Regional erosion occurs at 2 m per 1,000 years
Therefore, Rate in meters per seconds = 2 m ÷ 1,000 years
= 0.002 m/year
Uplift occurs at a rate of 0.1 m per 1,000 years
Thus, rate in meters per seconds = 0.1 m ÷ 1,000 years
= 0.0001 m/yr
Therefore, the rate of sea level change is the fastest at a rate of 0.01 meter/year
<span> electricity and magnetism
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