Answer: The mass of gold is 2316 grams.
Step-by-step explanation:
To calculate the volume of cuboid, we use the equation:
![V=lbh](https://img.qammunity.org/2020/formulas/mathematics/high-school/moaqflppb5eruzbtja532nwljfp1egc2fb.png)
where,
V = volume of cuboid
l = length of cuboid = 10 cm
b = breadth of cuboid = 4 cm
h = height of cuboid = 3 cm
Putting values in above equation, we get:
![V=10* 4* 3=120cm^3](https://img.qammunity.org/2020/formulas/chemistry/middle-school/vwf1lzws9e7irzqxiirrzl1vt6r9gdrz9s.png)
To calculate mass of a substance, we use the equation:
![Density=(Mass)/(Volume)](https://img.qammunity.org/2020/formulas/chemistry/middle-school/hzknnknzlihjnnp7o4jwkew5bpcuhffxxx.png)
Putting values in above equation, we get:
![19.3g/cm^3=\frac{\text{Mass of Gold}}{120cm^3}\\\\\text{Mass of osmium}=2316g](https://img.qammunity.org/2020/formulas/chemistry/middle-school/940essx98291snd81rqzth31i5jqrvae3g.png)
Hence, the mass of gold is 2316 grams.