Answer:
A Half Life
Explanation:
The half life is the time it takes for the substance to become reduced by half as a consequence of decay.
It can be known that the Salt sample is Ionic nature and therefore is showing a Crystalline lattice such as NaCl. It consists of a metal and a non metal it will be soluble in water and would potentially have a high melting point.
A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10.
Answer:
V₂ = 5.07 L
Explanation:
Given data:
Initial volume of balloon = 7.60 L
Initial number of moles of oxygen = 2.67 mol
Final number of moles of oxygen = 1.78 mol
Final volume of balloon = ?
Solution:
According to the Avogadro law,
Number of moles of gas and volume are directly proportional to each other at constant temperature and constant pressure.
Mathematical relationship:
V₁/n₁ = V₂/n₂
No we will put the values.
7.60 L / 2.67 mol = V₂/1.78 mol
V₂ = 7.60 L× 1.78 mol/ 2.67 mol
V₂ = 13.528 L. mol /2.67 mol
V₂ = 5.07 L
