<h2>Hello!</h2>
The answer is: 4.71 grams of Hydrogen
<h2>
Why?</h2>
From the statement, we know that for the studied compound, which has a mass of 124 g, we have that 3.80% is Hydrogen.
So, to find how many grams of Hydrogen is in 124 grams of the compound, we need to do the same calculation:
First, we need to convert the 3.80% percent in a real number, we can do it by dividing the percent into 100:
Then,
So, there are 4.71 grams of Hydrogen in 124 grams of the compound.
Have a nice day!
1)
Volume = 19 / 1000 = 0.019 L
n = M * V
n = 0.100 * 0.019
n = 0.0019 moles
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2)
M₁ * V₁ = M₂* V₂
5.0 * V₁ = 1.0 * 152
5.0 V₁ = 152
V₁ = 152 / 5.0
V₁ = 30.4 mL
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<span>hope this helps!</span>
253.15
The temperature T in degrees Celsius (°C) is equal to the temperature T in Kelvin (K) minus 273.15:
T(°C) = T(K) - 273.15
<span>When a solid is dissolved, the state transitions to a liquid - a higher entropy substance than the previous solid. Therefore, the entropy of the system will increase, and, by convention, the sign of delta S will be positive.</span>