wires number of
vibrations
wire 1 15
wire 2 12
wire 3 20
wire 4 25

the table shows the number of times metal wires vibrate per second when they are plucked one by one. which wire produced the sound with the highest pitch? a) wire 1 b) wire 2 c) wire 3 d) wire 4

Yea the answer might be A but it might be C

The answer is  d.  hydrogen 

Heat capacity = mcδtheat capacity = 2.676×10^3 j ..the heat capacity given is for 7.00 g of kcn,potassium cyanide which is equal to 0. mole of mole = mass  ÷ mr of kcn is 7  ÷ 65 =0.therefore: 0. of kcn liberates 2.676×10^3 j of heat1 mole   (2.676×10^3    ÷  0.107 )  × 1 =do the calculation to obtain 25009 j = 25kj