Hey there!:
Mass = 21.09 g
Volume = 6.44 mL
Therefore;
Density = mass / Volume
Density = 21.09 / 6.44
Density = 3.274 g/mL
The reaction of sodium and chlorine to form salt has the following properties:
1- It gives out (releases) heat. This means that it is an exothermal reaction
2- A new compound is formed and the components of this compound cannot be separated by physical means. This means that a chemical change occurred.
Based on this:
The reaction of sodium and chlorine to form salt is best described as an<span> exothermic chemical change reaction.</span>
Answer:
Solve the following problems (assuming constant temperature). Assume all numbers are 3 sig figs. 1. A sample of oxygen gas occupies a volume of 250 mL at 740 torr pressure. ... the gas exert if the volume was decreased to 2.00 liters? ... A 175 mL sample of neon had its pressure changed from 75.0 kPa to 150 kPa.
Explanation: