Explanation:
<em>An</em><em> </em><em>independent</em><em> </em><em>variable</em><em> </em><em>is</em><em> </em><em>defines</em><em> </em><em>as</em><em> </em><em>the</em><em> </em><em>variable</em><em> </em><em>that</em><em> </em><em>is</em><em> </em><em>changed</em><em> </em><em>or</em><em> </em><em>controlled</em><em> </em><em>in</em><em> </em><em>a</em><em> </em><em>scientific</em><em> </em><em>experiment</em><em>. </em>
Answer:
A = 2
B = 1
Explanation:
The atomic number of lithium is 3.
Its atomic mass is 7 amu.
It is present in group group 1.
It has one valance electron.
Lithium is alkali metal it form salts.
It is silvery soft metal. It has lowest density as compared to all other metals.
It react vigorously with water.
It is used in rechargeable batteries which are used in camera, mobile, laptops etc.
The electronic configuration of Li:
Li₃ = 1s² 2s¹
Thus,
A = 2
B = 1
Answer: 25.5°C
Explanation: take the average of the reading i.e (25 + 26)/2= 25.5
Answer:
12.9 m³ is the new volume
Explanation:
As the temperature keeps on constant, and the moles of the gas remains constant too, if we decrease the pressure, the volume will increase. If the volume is decreased, pressure will be higher.
The relation is this: P₁ . V₁ = P₂ . V₂
1 atm . 0.93m³ = 0.072 atm . V₂
0.93m³ .atm / 0.072 atm = V₂
V₂ = 12.9 m³
In conclusion and as we said, pressure has highly decreased so volume has highly increased.
