Choose the most correct The endothermic (∆H > 0) reaction: a) Cannot occur at all temperature.
b) Can occur with the positive ∆S at high temperature.
c) Can occur with the negative ∆S at low temperature.
d) Cannot occur with the positive ∆S at high temperature.

B

Explanation:

In order to create spontaneity, an endothermic process has to occur along with positive entropy and high temperature

120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3