Answer:
Graphite is soft because it has weak inter molecular forces between its layers.
Answer is: <span>because dissolved compounds can crystallizing from solution during filtration and forming crystals on the filter paper or funnel.
</span>Recrystallization<span> is a technique used to purify chemicals by dissolving both impurities and a compound in an appropriate solvent, either compound or impurities can be removed from the solution, leaving the other behind.</span>
Answer:the volume will be 2.15L
Explanation:
V1 = 2.35L
V2 =?
T1 = 20°C = 20 +273 = 293k
T2 = - 5°C = - 5 + 273 = 268k
V1 /T1 = V2 /T2
2.35 /293 = V2 /268
V2 = (2.35 / 293) x 268
V2 = 2.15L
Answer:
True
Explanation:
Molecular mass of :
Molecular mass of Ca + molevular mass of C + molecular mass of O × 3
40g + 12g + 16 × 3g
= 40g + 60 = 100g
Thus its true