Answer:We decided to pasteurize the documents for safekeeping
Explanation:
Answer:
half lives passed=5
given sample=90g
sample left=2.8125g
Explanation:
no. of half lives=total time/half life
no.=19days/3.8days
no.=5 days
after 5 half lives sample left=2.8125g
Answer:
Boiling point of solution is 
Explanation:
Cane sugar is a non-volatile solute.
According to Raoult's law for a non-volatile solute dissolved in a solution-
Where, 
is elivation in boiling point of solution, 
is ebbulioscopic constant of solvent (how much temperature is raised for dissolution of 1 mol of non-volatile solute) and m is molality of solution.
Here, 
610 g of cane sugar = 
moles of cane sugar
= 1.78 moles of cane sugar
So, molality of solution (m) = 
Plug in all the values in the above equation, we get-
So, boiling point of solution = 
The answer is:
- metalloids are semiconductive.
- metalloids are amphoteric.
The explanation:
The metalloids are only 6 elements in the periodic table which are boron, silicon, germanium, arsenic, antimony, and tellurium. And its properties are intermediate between the nonmetal and the metal. and their properties are brittle, shiny ,solid. but the properties that are unique to metalloids.
