They'd observe any new substances or new color, and temp. that is irreversible.
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Answer:
the second stage of cell division. its between prophase and anaphase during the chromosomes become attached to spindle fibers.
Answer:
hi there!
there are currently no uses for francium outside of basic scientific research.
Answer:
NaOH is not suitable for use as a primary standard because they readily absorb moisture, H2O, from the atmosphere.
Explanation:
They readily absorb carbon dioxide from the atmosphere.
Answer:
-2,438 J energy is released
Heat energy is released
Explanation:
The formula for energy absorbed or released is Q = mT(Cp)
Get temperature in degrees T = 21 - 63 = -42°C
Mass of the cooling cooper m = 150g
Specific heat of copper Cp = 0.387J/g-°C
Put all the above parameters into the formula for energy absorbed or released
Q = mT(Cp)
= 150 x -42(0.387)
= -2438J same as -2.438 KJ
-2438J energy is released