B. elements
It's called the periodic table (of the elements)
Answer:
no of formula unit = 
Explanation:
atomic mass of CaCl2 = 40 + 2×35.5 = 111 g.
no of formula unit = no of moles × Avagadro number
=
Answer:
5) donating H to a solution when they have been depleted and accepting H when they are in excess.
Explanation:
A buffer solution is a solution that undergoes a negligible change in pH in addition of moderate quantities of acid or alkali. In other words, a buffer solution is one that resists a change in pH on addition or dilution of small amounts of acids or alkalis.
So, from the given question:
Buffers are substances that help resist shifts in pH by donating H to a solution when they have been depleted and accepting H when they are in excess.
Freezing
Explanation:
This change in state when surface of a lake changes to hard ice is known as freezing.
- When a solid is heated, it melts and changes to a liquid. On further heating, it changes to vapor and the randomness increases.
- When a liquid is cooled below its freezing point, it changes to a solid such as ice for water.
- The phase change is known as freezing.
Learn more:
Phase change brainly.com/question/1875234
#learnwithBrainly
Answer:
Change in temperature of calorimeter is 
Explanation:
Molar mass of anethole = 148.2 g/mol
So, 0.950 g of anethole = 
of anethole = 0.00641 moles of anethole
1 mol of anethole releases 5541 kJ of heat upon combustion
So, 0.00641 moles of anethole release 
of heat or 35.52 kJ of heat
7.854 kJ of heat increases 
temperature of calorimeter.
So, 35.52 kJ of heat increases 
or temperature of calorimeter
So, change in temperature of calorimeter is
