Answer: a. 0.05mol/dm3
bi. 0.045mol/dm3
bii. 4.41g/dm3
c. 84.8%
Explanation:Please see attachment for explanation
Coal _____.
2 answers:
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Explanation: An element is represented in the form of where,
X = Symbol of the element
A = Atomic Mass of the element X
Z = Atomic Number of element X
Hence, For the element Justwondoricium,
Symbol = Jw
Atomic number = 120
Atomic Mass = 224
Now, Atomic number = Number of electrons = Number of Protons
Number of electrons = 120
Number of Protons = 120
and Atomic Mass = Number of neutrons + Number of protons
Number of neutrons can be calculated as we know atomic mass and number of neutrons, Putting the numbers we get
Number of neutrons = 224 - 120 = 104
The nearest noble gas to the element having atomic number 120 is Oganesson (Og), which has an atomic number of 118, so the next two electrons will be filled in the 8s orbital.
Electronic Configuration of Jw is
This electronic configuration lets us know about the location of the element in periodic table.
As the electron is entering the 8th shell, it belongs to the 8th period and as the last electron enters the s-orbital, it belongs to the S-block of the periodic table.
When the s-electrons are 1, it belongs to Group 1.
When the s-electrons are 2, it belongs to Group 2.
As this element has 2 s-electrons, it belongs to the Group 2.
Answer:
0.88 g
Explanation:
Using ideal gas equation to calculate the moles of chlorine gas produced as:-
where,
P = pressure of the gas = 805 Torr
V = Volume of the gas = 235 mL = 0.235 L
T = Temperature of the gas =
R = Gas constant =
n = number of moles of chlorine gas = ?
Putting values in above equation, we get:
According to the reaction:-
1 mole of chlorine gas is produced when 1 mole of manganese dioxide undergoes reaction.
So,
0.01017 mole of chlorine gas is produced when 0.01017 mole of manganese dioxide undergoes reaction.
Moles of = 0.01017 moles
Molar mass of = 86.93685 g/mol
So,
Applying values, we get that:-
<u>0.88 g of should be added to excess HCl (aq) to obtain 235 mL of
at 25 degrees C and 805 Torr.</u>