Which of the following would be a good choice of metal spoons to stir a solution of lead(II) nitrate?
A. Silver
B. tin
C. nickel
D. Fe

A. Silver

Explanation:

In order to answer this question accurately, we must have a good knowledge about the position of metals in the electrochemical series.

We must know that metals that are high above in the electrochemical series displace metals that are lower in the series from their aqueous solution. This means that tin, nickel and iron  can all displace the lead from the solution of lead(II) nitrate.

However, silver is far less reactive than lead so it can not displace lead from its aqueous solution, hence the answer above.

indium, and thallium have three electrons i think

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.