Answer:
Explanation:
Chlorine is the element of group 17 and third period. The atomic number of chlorine is 17 and the symbol of the element is Cl.
The electronic configuration of the element chlorine is:-
Chloride ion is formed when chlorine atom gain one more electron. So, the ground-state electron configuration for the chloride ion is:-
<h3><u>Answer;</u></h3>
C. The equilibrium position will shift away from what was added to lower its concentration.
<h3><u>Explanation;</u></h3>
- Le Chatelier's principle states that; if a system at equilibrium is disturbed, the equilibrium position will shift to counter the effects of the disturbance.
- At equilibrium, the system is disturbed when a change in conditions forces it temporarily out of equilibrium. There are three common disturbances:
1. Change in concentration.
2. Change in pressure (caused by a change in volume).
3. Change in temperature.
An alpha particle has a mass number of 4.
The mass number in the decay of uranium-234 to lead-214 decreases from 234 to 214, so by 20.
20 ÷ 4 = 5
5 alpha particles were emitted in this decay series. The answer is C.
Hence molar mass (M) of Magnesium Chloride; MgCl.= M (2Cl)+M (Mg) = 70.90+24.31=95.21 g/mol.
Answer:
1.18 x 10⁵
Explanation:
3.14 x 10⁻² / 2.65 x 10⁻⁷ = 1.18 x 10⁵
When performing division, the final answer should have the same number of significant figures as the number with the smallest number of sig figs. In this case, both of the given numbers have 3 sig figs, meaning the final answer should have this many as well.