Answer:
AuCl
Explanation:
Given parameters:
Mass of Gold = 2.6444g
Mass of Chlorine = 0.476g
Unknown:
Empirical formula = ?
Solution:
Empirical formula is the simplest formula of a compound. Here is the way of determining this formula.
Elements Au Cl
Mass 2.6444 0.476
Molar mass 197 35.5
Number of moles 2.6444/197 0.476/35.5
0.013 0.013
Divide by the
smallest 0.013/0.013 0.013/0.013
1 1
The empirical formula of the compound is AuCl
Density is defined as mass/volume (or m/v).
So,
(126.0 g)/(12.5 cm^3)= 10.08 g/cm^3
If your teacher requires correct significant figures, the answer is 10.1 g/cm^3.
If not, the first answer is fine.
Burning is a process that use the reactions known as combustion.
Answer: Assume that the substance is hazardous. Always wear appropriate PPE and take steps to prevent contact.
Explanation:
When working with chemicals, a sound safety policy involving the use of chemicals should be established and maintained. This will help in safeguarding lives, properties and the environment.
The best safety approach when working with unknown chemical substances is to assume that the substance is hazardous and always wear appropriate PPE and take steps to prevent contact.
Since the substance is unknown, the best thing the person can do is to assume that it's harmful and hazardous and therefore take necessary precautions. The individual can put on laboratory coats, protective glasses, gloves etc. This is vital in order to prevent accidents from happening.