Answer:
it would not melt at a specific point
Explanation:
becuase it is not pure
Answer:
2n² means 2 × n × n . the power on the n represent the no. of time it is multiplied.
for ex 3x² = 3 × x × x
4x⁴ = 4 × X× X × X× X
<h3><u>Answer;</u></h3>
Oxidation number of O =-2 and N= +2
<h3><u>Explanation;</u></h3>
- The oxidation number of an atom is the charge that atom would have if the compound was composed of ions.
- NO is a gas whose oxidation number is zero.
- The oxidation number of oxygen is almost always -2
- Therefore to find the oxidation number of Nitrogen;
<em>-2 + x = 0</em>
<em>x = +2 </em>
<em>The oxidation number of N is + while that of O is -2 </em>
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 .