The most concentrated solution is b
Answer:
True
Explanation:
Here is an example: chemical properties include flammability, toxicity, acidity, reactivity. we observe the changes of these properties. Therefore, It's true.
Answer:
Number of molecules = 2.61 x 10²³
Explanation:
Given:
Volume of tetra-chloride = 42 ml
Density = 1.59 g/ml
Find:
Number of molecules
Computation:
Mass = Volume of tetra-chloride x Density
Mass = 42 x 1.59
Mass = 66.78
Molecular mass of tetra-chloride = 154 g/mol
Moles = 66.78 / 154
Moles = 0.4337
0.4337 mole = 0.4337 x Avogadro number
0.4337 mole = 0.4337 x 6.022 x 10²³
Number of molecules = 2.61 x 10²³
<u>Reactivity</u><u> </u><u>series</u><u>:</u><u>-</u>
#1
Ag is found as too less reactive so
#2
No element in universe can displace potassium (K) from its solution as it's most reactive .
#3
Fe is also a reactive metal.
- Only Cupper is less reactive than it
So
#4
- Only Calcium can displace Mg
#5
- Mg and Ni can do ,Aurum(Gold) is least reactive so can't
#6
#7
#8
#9
#10
#11
As Ca is third most reactive metal
#12
Answer: This is the definition if that's what you want.
Explanation:The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system's mass cannot change, so quantity can neither be added nor be removed.
