Atomic Number-6
Mass Number-14
Explanation:
235 U92 + 1n0 --> A + B + 3 1n0
when A = ;
(a) xenon-133
Mass number of B = 235 + 1 - 133 -3 = 100
Atomic number = 92 - 54 = 38
Element = Sr - Strontium
(b) barium-144
Mass number of B = 235 + 1 - 144 -3 = 89
Atomic number = 92 - 56 = 36
Element = Kr - Krypton
(c) cesium-143
Mass number of B = 235 + 1 - 143 -3 = 90
Atomic number = 92 - 55 = 37
Element = Rb - Rubidium
(d) tellurium-137
Mass number of B = 235 + 1 - 137 -3 = 96
Atomic number = 92 - 52 = 40
Element = Zr - Zirconium
(e) lanthanum-146
Mass number of B = 235 + 1 - 146 -3 = 87
Atomic number = 92 - 57 = 35
Element = Br - Bromine
Answer:
Q = 31798.4J = 31.79kJ
Explanation:
Heat energy (Q) = ?
Mass (m) = 152g
T1 = 24°C
T2 = 74°C
Specific heat capacity of water (c) = 4.184J/g°C
Q = Mc∇T
Q = 152 * 4.184 * (74 - 24)
Q = 635.968 * 50
Q = 31798.4J
Q = 31.79kJ
Heat required is 31.79kJ
The answer would be A be cause it is the most reasonable answer
