The answer would be 5. because the last zero is a holding place because the number is in front of the decimal. They other zero counts because they are being sandwiched.<span />
Im assuming that the 2 is a sub of the Al and not the # for O and that u made a type of AL which is Al
its been a while but
Al2O3 + 6HCl = 2ALCl3 + 3H2O
The charge of proton and electron is equal in magnitude that is 
. The distance between electron and proton is 
or 
.
Force exerted on electron by proton is calculated as follows:
Here, k is Coulomb's constant, 
is charge on proton, 
charge on electron and r is distance between them.
Putting the values,
Now, according to second law of Newton,
Here, 
is mass of electron and a is acceleration.
Also, 
Rearranging,
Thus, the acceleration of an electron in this atom is 
.
Answer:
That means, under 10.0kPa of pressure, 0.4g of gas can be dissolved in 1L
Explanation:
Based on Henry's law, the solubility of the gas is directly proportional to the pressure. The equation is:
P1S2 = P2S1
<em>Where P is pressure and S solubility of 1, initial state and 2, final state of the gas.</em>
Replacing:
P1 = 50.0kPa
S1 = 2.0g/L
P2 = 10.0kPa
S2 = ??
50.0kPa*S2 = 10.0kPa*2.0g/L
S2 = 0.4g/L
That means, under 10.0kPa of pressure, 0.4g of gas can be dissolved in 1L
Answer:88.8%
Explanation:
%yield= actual yield/theoretical yield * 100/1
41.9/47.2*100/1= 88.8%
