Answer:
It's false
Explanation:
Mixtures are always combinations of the same compounds that are at different states.
Answer: a
Explanation:
Set up a ratio and solve.
7.9 • 120 / 160 = 5.925
Q=cmΔT
Q1(steel)=Q2(water)
c1•m1• (t1-t) = c2•m2• (t-t2)
628•0.1•(80-t) = 4180•0.2• (t-10)
5024 - 62.8t = 836t -8360
5024 + 8360 = (836+62.8)t
<span>t = 14.9°</span>
Explanation:
The reason as to why the dark chocolate always melted the fastest was because of it's colour. It was a darker shade than the milk and white chocolate and the sun naturally absorbs dark colours therefore it melted faster.

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Answer: Option (3) is the correct answer.
Explanation:
A molecule is polar when the net dipole moment of molecule is zero. When an electronegative atom is attached to an electropositive atom then the electronegative atom pulls the shared pair of electrons more towards itself.
As a result, the movement of electrons is more towards the electronegative atom and the dipole moment becomes zero. This will also induce partial positive and partial negative charge on electropositive and electronegative atom.
On the other hand,
are covalent compounds and does not have a net zero dipole moment.
Thus, we can conclude that out of the given options
represents a polar molecule.