1 mL=0.000264172 gallons
378541 mL = 100 gallons
378541*50=18,927,050 pages
Concentration of Na2CO3 = 0.600 M
Volume of Na2CO3 = 30.0 ml = 0.030 L
Molarity = moles of solute/volume of solution
Now,
moles of Na2CO3 = M * V = 0.600*0.030 = 0.018 moles
Na2CO3 ↔ 2Na^+ + CO3^2-
As per stoichiometry:
1 mole of Na2CO3 produces 2 moles of Na+ ions
Therefore, 0.018 moles of Na2CO3 would dissociate to give: 2*0.018 = 0.036 moles of Na+ ions.
Now,
1 mole of Na+ has 6.023 * 10^23 ions
therefore, 0.036 moles of Na+ would correspond to:
= 0.036 * 6.023 * 10^ 23 = 2.17 *10^22 Na+ ions
<h2>Answer:</h2>
a) Group 1
b) Yes, they are very reactive
c) They do not occur freely in nature
e) Soft
f) Francium and Caesium
g) They react explosively to produce hydrogen gas
<h2>Explanation:</h2>
Alkali metals are metals that belongs to Group 1. They are known to be very reactive due to its tendency to donate their lone electron to other element to attain their octet configuration.
Due to their reactive nature, they do not occur freely in nature unless when combined with other elements.
These group1 metals are known to be soft metals due to their low ionization energy. The two most reactive element in the group are Francium and caesium since reactivity of elements increases from top to bottom of the periodic table.
When these metals are exposed to water, they react explosively to produce hydrogen gas.
Answer:
The binding energy of a mole of the nuclei is 252KJ
Explanation:
The binding energy is the amount of energy required to separate an atom into its nuclei.
From Einstein's relations,
E = Δm
where E is the energy, Δm is the mass defect and c is the speed.
The mole of nuclei moves with the speed of light, so that;
c = 3.0 × 
m/s
Given that Δm = 0.00084Kg/mol, the binding energy is calculated as;
E = 0.00084 × 3.0 ×
= 252000
= 252KJ
The binding energy of a mole of the nuclei is 252KJ.
Answer:
0.852 mol
Explanation:
First we <u>convert 4.00 g of helium (He) into moles</u>, using its <em>molar mass</em>:
4.00 g ÷ 2 g/mol = 2 mol He
To answer this problem we can use<em> Avogadro's law</em>, which states that at constant pressure and temperature:
V₁n₂=V₂n₁
Where:
We <u>input the data</u>:
- 24.4 L * n₂ = 10.4 L * 2 mol
And <u>solve for n₂</u>:
