The numbers of liters that is needed is 40 liters of 25% solution and 40 liters of 65% solution.
<h3>What is the litters about?</h3>
Note that:
We take x = volume of 25% solution.
We take y = volume of 65% solution.
So, Equation of total volume:
x + y = 80
Hence the equation of amount of acid:
0.25x + 0.65y = 0.45(80)
0.25x + 0.65y = 36
Solve x + y = 80 for x.
x = 80 - y
Then Substitute into the second equation.
0.25(80 - y) + 0.65y = 36
20 - 0.25y + 0.65y = 36
0.4y = 16
y = 40
x + y = 80
x + 40 = 80
x = 40
Therefore, The numbers of liters that is needed is 40 liters of 25% solution and 40 liters of 65% solution.
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Answer: miss Grey is wearing the white dress.
Miss white is wearing the grey dress
miss black is wearing the white dress
Explanation: "Isn't it strange," says Miss Gray, "that the colors of our dresses match our names, but not one of us is wearing a dress that matches her own name?"
The above statement shows that miss Grey is either wearing a white or black dress.
That is strange!" said the lady in white: the lady in white can't be miss white, so she's either miss Grey or miss black. But miss Grey can't wear Grey so the lady in white is miss black.
This leaves miss Grey wearing white and miss white wearing Grey.
The complex number represented by the point graphed on the complex plane below is -3-3i
Complex number is generally expressed as z = x + iy
where:
- x is the real axis
- y is the imaginary axis
From the complex plane shown, we can see that the point lies in the Quadrant III of the xy plane.
The coordinate of the point on the plane is given as (-3, -3). This can be represented in complex notation as -3 - 3i
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When calcium forms an ion, it loses its two valence electrons and becomes a calcium ion with a 2+ charge. In that case the highest energy level occupied by the calcium ion's electrons in its ground state would be the third energy level.
