Answer:
The atomic mass is 101.
Explanation:
Protons and neutrons are the only particles that contribute to mass. Electrons do have a mass, but it's so miniscule and insignificant that it doesn't contribute to the mass of an atom. In every instance of calculating atomic mass, add the number of protons to the number of neutrons.
Therefore,
44 + 57 = 101
number of protons + number of neutrons = atomic mass
Also, there can never be a negative amount of protons or neutrons, so if you get a negative number, there's something wrong.
Bonus Information:
<u>Don't confuse mass with charge!</u> As it says in its name, neutrons are neutral or have no charge. Protons (+) and electrons (-) are the only particles that have a charge, so calculating that would be different.
If you were calculating the atomic charge with the same numbers, your answer would be:
44 - 42 = 2
Charge = <u>+2</u>
What To Remember:
M = p + n
C = p - e
C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons
I hope this helps!
The balanced chemical equation for the reaction is as follows;
Ca(OH)2 + 2HCl —> CaCl2 + 2H2O
The stoichiometry of Ca(OH)2 to HCl is 1:2.
Number of Ca(OH)2 moles reacted = 0.00100 mol
Therefore number of HCl moles that should react with base is double the amount of moles of base reacted.
Number of acid moles in 25.00 ml
= 0.00100 mol x2 = 0.00200 mol
Correct answer is 0.002 mol
Answer:
Volume of chlorine solution required is around 1.2 L
Explanation:
Volume of water in the pool = 2.0*10^4 gal
1 gal = 3.79 L
Therefore, volume of water in the pool in units of Liters would be:
Density of water = 1 g/ml = 1000 g/L
The accepted concentration of chlorine = 1 g/ 10⁶ g water
Therefore amount of chlorine required to disinfect the pool water would be:
The given solution is 6.0% w/w chlorine i.e.
6.0 g chlorine in 100 g solution
Therefore, amount of solution corresponding to 74 g chlorine would be:
Density of the solution = 1 g/ml
Answer:
7 Images
Explanation:
n = 360 / a - 1 = 360 / 45 - 1 = 8-1= 7
(Based on multiple reflections)
I hope im right!!