How many kilograms of nickel must be added to 1.75 kg of copper to yield a liquidus temperature of 1300°c?

Mass of Ni = 1.32 kg

Based on the Cu-Ni phase diagram, the %composition of Ni at a liquidus temperature of 1300 C is around 43 wt%

Now,

wt% Ni = [mass of Ni/mass of Ni + mass of Cu]*100

if x is the mass of Ni required then:

wt%Ni/100 = x/x+1.75

0.43 = x/x+1,75

0.43x + 0.75 = x

x= 1.316 kg

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

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