Answer:
Explanation:
volume of heptane= mass / density
volume of heptane = 37. 8 / .684
= 55.26 mL
volume of water = 34.7 / 1
= 34.7 mL or cc.
If l₁ be the length of heptane layer in the graduated cylinder
volume = cross sectional area x length or height of layer
π r² x l where r is radius of bore of the cylinder , l is height of liquid inside cylinder .
for heptane
π r² x l₁ = 55.26
3.14 x 1.54² x l₁ = 55.26
l₁ = 7.42 cm
for water
π r² x l₂ = 34.7
3.14 x 1.54² x l₂ = 34.7
l₂ = 4.65 cm
Combined height = l₁ + l₂
= 7.42 + 4.65
= 12.07 cm .
CO is not an element because CO is a Compound. Elements contain One capital and one lowercase letter. While Compounds contain two or more capital letters.
Sonia observed that the two balloons repelled each other. This is because both balloons acquired the same charge when she rubbed them with the piece of wool, and like charges repel each other.
No because they have their full octet. They are full and don't need to bond with any other atoms. The full atoms that are happy are the noble gases.
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