The answer is A hopefully it is ok ✅
A substance that has more than 2 atoms bonded together
Correct Answer: option <span>(1) Mn(s)
Reason:
The </span><span>spontaneity of electrochemical cell, depends on the it's Eo value. Electrochemical cells with positve Eo are spontanous and vice-versa.
</span>
In present case, the Eo of half-cell of interest are as follows:
Eo Zn2+/Zn = <span>-0.763v
</span>Eo Mg2+/Mg = 2.37v
Eo Mn2+/Mn = -1.18v
Therefore, Eo cell (with Zn as one of the half-cell) = Eo Zn2+/Zn - Eo Mn2+/Mn
= -0.763 - (-1.18)
= 0.417v
On other hand, Eo cell (with Mg as one of the half-cell) = Eo Mg2+/Zn - Eo Mn2+/Mn
= -2.37 - (-1.18)
= -1.19v
Thus, Mn(s) <span>metal will spontaneously react with Zn2+(aq), but will not spontaneously react with Mg2+(aq)</span>
Answer: C) The mass stays constant as it changed from a liquid to a gas
Explanation: Mass stays constant, it's never destroyed or created. It follows the law of conservation of mass.
Answer:
Given Elements are
- Ferrus(Fe)
- Zinc(Zinc)
- Sodium (Na)
- Copper (Cu)
- Silver(Ag)
<h3>Decreasing Order:-</h3>
Na>Zn>Fe>Cu>Ag
<h3><u>Expla</u><u>nation</u><u>:</u><u>-</u></h3>
- Here is the reactivity series of elements to let you understand better .
![\setlength{\unitlength}{0.8 cm}\begin{picture}(20,15)\thicklines\put(5,9.5){\large {\boxed{ \sf{Reactivity \: series}}}}\put(0.8,8){\large\sf K \qquad\qquad\qquad Potassium\qquad\qquad\qquad \: maximum}\put(0.8,7.2){\large\sf Na \qquad\qquad\qquad Sodium\qquad\qquad\qquad\quad \: reactivity}\put(0.8,6.2){\large\sf Ca\qquad\qquad\qquad \: Calcium}\put(0.8,5.2){\large\sf Mg\qquad\qquad\quad \: Magnesium}\put(0.8,4.2){\large\sf Al\qquad\qquad\qquad \: Aluminium\qquad\qquad\qquad \: decreasing}\put(0.8,3.2){\large\sf Zn\qquad\qquad\quad\qquad \: Zinc\qquad\qquad\qquad\qquad \:reactivity}\put(0.8,2.2){\large\sf Fe\qquad\qquad\quad\qquad Ferrous}\put(0.8,1.2){\large\sf Pb\qquad\qquad\qquad \: \:\: Lead}\put(0.8,0.2){\large\sf H\qquad\qquad\qquad \: \:Hydrogen}\put(0.8, - 0.6){\large\sf Cu\qquad\qquad\qquad \: Copper}\put(0.8, - 1.5){\large\sf Hg\qquad\qquad\qquad \: Mercury}\put(0.8, - 2.5){\large\sf Ag\qquad\qquad\qquad \: \:Silver}\put(0.8, - 3.5){\large\sf Au\qquad\qquad\qquad \: \: Gold\qquad\qquad\qquad\quad \: \: minimum reactivity}\put(9.3,8.2){\vector(0, - 2){12}}\end{picture}](https://tex.z-dn.net/?f=%5Csetlength%7B%5Cunitlength%7D%7B0.8%20cm%7D%5Cbegin%7Bpicture%7D%2820%2C15%29%5Cthicklines%5Cput%285%2C9.5%29%7B%5Clarge%20%7B%5Cboxed%7B%20%5Csf%7BReactivity%20%5C%3A%20%20series%7D%7D%7D%7D%5Cput%280.8%2C8%29%7B%5Clarge%5Csf%20K%20%5Cqquad%5Cqquad%5Cqquad%20Potassium%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20maximum%7D%5Cput%280.8%2C7.2%29%7B%5Clarge%5Csf%20Na%20%5Cqquad%5Cqquad%5Cqquad%20Sodium%5Cqquad%5Cqquad%5Cqquad%5Cquad%20%5C%3A%20reactivity%7D%5Cput%280.8%2C6.2%29%7B%5Clarge%5Csf%20Ca%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20Calcium%7D%5Cput%280.8%2C5.2%29%7B%5Clarge%5Csf%20Mg%5Cqquad%5Cqquad%5Cquad%20%5C%3A%20Magnesium%7D%5Cput%280.8%2C4.2%29%7B%5Clarge%5Csf%20Al%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20Aluminium%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20decreasing%7D%5Cput%280.8%2C3.2%29%7B%5Clarge%5Csf%20Zn%5Cqquad%5Cqquad%5Cquad%5Cqquad%20%5C%3A%20Zinc%5Cqquad%5Cqquad%5Cqquad%5Cqquad%20%5C%3Areactivity%7D%5Cput%280.8%2C2.2%29%7B%5Clarge%5Csf%20Fe%5Cqquad%5Cqquad%5Cquad%5Cqquad%20Ferrous%7D%5Cput%280.8%2C1.2%29%7B%5Clarge%5Csf%20Pb%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20%5C%3A%5C%3A%20Lead%7D%5Cput%280.8%2C0.2%29%7B%5Clarge%5Csf%20H%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20%20%5C%3AHydrogen%7D%5Cput%280.8%2C%20-%200.6%29%7B%5Clarge%5Csf%20Cu%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20Copper%7D%5Cput%280.8%2C%20-%201.5%29%7B%5Clarge%5Csf%20Hg%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20Mercury%7D%5Cput%280.8%2C%20-%202.5%29%7B%5Clarge%5Csf%20Ag%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20%5C%3ASilver%7D%5Cput%280.8%2C%20-%203.5%29%7B%5Clarge%5Csf%20Au%5Cqquad%5Cqquad%5Cqquad%20%5C%3A%20%5C%3A%20%20Gold%5Cqquad%5Cqquad%5Cqquad%5Cquad%20%5C%3A%20%20%5C%3A%20minimum%20reactivity%7D%5Cput%289.3%2C8.2%29%7B%5Cvector%280%2C%20-%202%29%7B12%7D%7D%5Cend%7Bpicture%7D)