A. -3
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Answer:
I can answer some of these.
Explanation:
Q 36. B. Is false.
Q. 37 C. is false.
Q. 28.
All the numbers are 1.
Answer:
Sound waves are used for measurement in hertz.
Explanation:
The number of potassium atom that are in 0.25 moles potassium carbonate is calculated as follows
by use of Avogadro contant
1 mole= 6.02 x10^23 atoms
what about 0.25 moles,
by close multiplication
{0.250 moles x 6.02 x10^23} / 1 mole = 1.505 x10^23 atoms