Which of the following is not a correct chemical equation for a double displacement reaction? 2rbno3 + bef2 yields be(no3)2 + 2rbf cacl + lico3 yields caco3 + licl na3po4 + 3koh yields 3naoh + k3po4 2mgi2 + mn(so3)2 yields 2mgso3 + mni4

Explanation: A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

In the given reaction:

The molecular formula of Lithium carbonate is incorrect as lithium forms a monovalent cation but carbonate is a divalent polyatomic ion. Thus in order to form a neutral ionic compound two atoms of must combine with one to give

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

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.