How to prove that diamond is a simple substance composed of carbon

How to prove that diamond is a simple substance composed of carbon

When diamond is ignited, it is found that the only product carbon dioxide is generated, and the carbon element in carbon dioxide is equal to the mass of ignited diamond, so diamond is a simple substance composed of carbon element

Is diamond a simple substance or a compound What about graphite

A substance consisting of one element carbon

Is natural diamond a simple substance?

Theoretically speaking, it is a simple substance of carbon, but there are generally some impurities

Carbon element

Diamond type structure is not a metal element

No, carbon atoms are not metal bonds!

On average, a hospital uses about 500 bottles of 500ml 0.9% normal saline every day {the density is 1g / ml}. Try to calculate how many bottles of normal saline should be used by the trial hospital every year? How many kilograms of sodium do you need to prepare these normal saline? I calculated the last one differently from the answer

This is very simple. The landlord has 365 days a year (except leap years) × 500 = 182500 bottles
V normal saline = 182500 × 500mL=91250000mL
Because the density of normal saline is 1g / ml, m normal saline = 91250000ml × 1g/mL=91250000g=91250kg
Therefore, the mass of sodium chloride is 91250kg × 0.9%=821.25kg