your question was incomplete.............. you haven't mentioned any required information
Answer:
After 4 days 10 g will left
After 8 days 5 g will left.
Explanation:
Given data:
Half life of isotope = 4 days
Total amount of sample = 20 g
Amount left after each time period = ?
Solution:
The half life of radioactive isotope is 4 days it means after 4 days the amount left will be half of total amount.
20 g/2 = 10 g
The half amount which is left will be consume in next 4 days and remaining amount will be,
10 g/2 = 5 g
After 4 days 10 g will left
After 8 days 5 g will left.
Feldspar is Soft but sometimes can be hard if a chemical reaction occurs
The molar ratio of O2 / CO2 is 13:8, O2/H2O is 13:10, C4H10 / CO2 is 1:4 and C4H10 / H2O is 1:5.
<h3><u>Explanation</u>:</h3>
The mole concept is the concept of how many moles of a reactant reacts with how many moles of the reagent to produce how many moles of product. It gives us the stoichiometric ratio of the reactants with the products.
In the reaction we can see that 2 moles of butane reacts with 13 moles of oxygen to produce 8 moles of carbon dioxide and 10 moles of water. So the molar ratio of O2 / CO2 is 13:8, O2/H2O is 13:10, C4H10 / CO2 is 1:4 and C4H10 / H2O is 1:5.