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(a 3 + b 3 + c 3 ) = 3abc, if (a + b + c) = 0
Here, 21 + ( - 12) + ( - 9) = 21 - 21 = 0
So, (21) 3 + ( - 12) 3 + ( - 9) 3 = 3 X 21 X ( - 12) X ( - 9) = 6,804
The product of the equivalent weight and valency of an element equals its ______.
Which of the following is used as a moderator in nuclear reactors?
The atomic bomb is based on which principle?
Alkali metals have ______.
I. low melting points
II. low densities
The two metal ions that cause hardness to water are……………?
Which acid is present in grapes?
Biofertilizers convert nitrogen to:
Marble is a metamorphic rock of:
The motion of an object under free fall is an example of which of the following?
Flemings right hand rule is used to find the direction of the –
