Answer: The correct answer is: " endothermic . "
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<u>Note</u>: Heat flows <u> into </u> [heat <u> may be </u> absorbed within] an "<u>endothermic</u>" reaction or system
To the contrary, heat flows <u> </u><u>out </u> [heat <u> may </u><em> </em>exit from or <u> may be </u> released from] an "<u>exothermic</u>" reaction or process.
<u>Hint</u>: Think of the "prefixes" of: "<u>endo</u>thermic" and "<u>exo</u>thermic" :
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1) endo- = "within" (as in "endothermic" —heat tends to be absorbed/"within"/"released within"/released within"/into" ;
2) exo- = " outwards"/"exit" (as in "exothermic") —heat tends to '"exit"/leave/escape from/"be released out of/form".
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Hope this is helpful to you!
Best wishes to you in your academic pursuits
—and within the "Brainly" community"!
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0.52kg = 520g
520g x 0.35 = 182g
182 x 6.022x10^23 = 1.096004E26
1.096004E26 / 107.8 = 1.0167012987E24 atoms
Answer:
C) 0, +5
Explanation:
P + H2O + HNO3 -> H3PO4 + NO
We consider all compounds that contain phosphorus in the equation
A substance that has no charge has a zero oxidation state
Hence at the reactant, phosphorus has an oxidation state of 0
Let us consider H3PO4 at the product side
Oxidation state of
H =+1×3=+3
O=-2×4=-8
P = ?
H3PO4 is a neutral compound and has 0 oxidation state
The sum of the individual oxidation states of each atoms in H3PO4 is equal to 0
Hence,
+3 + P + (-8) = 0
3+P-8=0
P=-3+8=+5
Hence the oxidation state of phosphorus in H3PO4 is +5
Therefore, the oxidation state of P in the reaction changed from
0 to +5
Phosphorus is said to have undergone oxidation
<span>The zigzag line in the periodic table separates the metals from the nonmetals.</span>