This is a neutralisation reaction, so we know that the products formed are salt and water.
First, we balance the chemical equation:
KOH + HNO3 ----> KNO3 + H2O.
After that, we split the compounds into their respective charges.
K+ + OH- + H+ + NO3- ----------> K+ + NO3- + H2O*
(*note that liquid cannpt be splitted.)
After that we reduce the chemical equation by removing the common ones.
OH- + H+ --------> H2O
Tada.
Answer: 145 L
Explanation:
To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.
The equation given by this law is:
where,
are initial pressure and volume.
are final pressure and volume.
We are given:
Putting values in above equation, we get:
Volume change = (219-74.0 )L = 145 L
Thus the volume CHANGE that occurs is 145 L
Answer:
A = 356 cm²
Explanation:
In this case, you need to use the formula to calculate the area of regular solid.
This is the following expression:
S = 2LH + 2LW + 2WH
Where:
L: length
W: Width
H: Height
But we do not know the height of the solid. We should calculate it with the given data first:
1424 = 2*28*H + 2*28*16 + 2*16*H
1424 = 56H + 896 + 32H
1424 - 896 = 88H
H = 528/88
<em>H = 6 cm</em>
Now that we know the height we can calculate the area of the other solid. In the other solid the length has been reduced to half, so I will assume that the Width and height is also reduced to half.
L2 = 14 cm
W2 = 8 cm
H2 = 3 cm
Replacing we have:
S = (2*14*3) + (2*14*8) + (2*8*3)
<u>S = 356 cm²</u>
<u>And this should be the total surface area, assuming the width and height is reduced to half too.</u>
If you don't assume it's reduced to half, then use the original values of Width and Height. Doing so, the Surface would be:
S = (2*14*6) + (2*14*16) + (2*6*16)
S = 808 cm²
Rutherford's gold foil experiment proved that there was a small, dense, positively charged nucleus at the center, which contained most of the mass of the atom. Which contained electrons orbiting the nucleus.
Nonpolar compound would be symmetrical