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Flauer [41]
3 years ago
15

Heat never travels from a cooler object to a warmer object.

Chemistry
1 answer:
prohojiy [21]3 years ago
4 0

Answer:

I would say False.

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What group of elements generally have the lowest second ionization energy?
ICE Princess25 [194]
<span>By definition, the first ionization energy is the energy required to remove the most loosely held electron from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+. </span><span />
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1 mole = 1000 millimoles (mmol); 1millimole = 1000 micromoles (µmol). if a solution contains 38231 µmol, what is that amount in
Mrrafil [7]
1 mmol --------------------- 1000 <span>µmol
( mmol ) -------------------- </span> 38231 µmol

mmol =  38231*1 / 1000

mmol = 38231/ 1000

=>  38.231 mmol
3 0
3 years ago
Photochemical smong result from the interaction of pollution in the presence of
Goshia [24]
Photochemical smong result from the interaction of pollution in the presence of sunlight. The photochemical smog is result of the <span> chemical reaction in the air between the sunlight, nitrogen oxides and volatile organic compounds.
</span>It is noticed as a brown haze above cities. <span>The negative effects are: production of chlorofluorocarbons (CFCs) increased UV radiation, irritation to the eyes, nose, and throat. </span>
6 0
3 years ago
Write balanced chemical equation for the oxidation of fe2+(aq) by s2o2−6 (aq).
Iteru [2.4K]
To write a balanced chemical equation for the given redox reaction, we need to know the half reactions of the substances involved. Redox reaction means oxidation-reduction reaction. Oxidation is when one loses electrons making it more positive while reduction is gaining electrons which makes it more negative. Iron here is being oxidized and will have the half reaction:

<span>Fe2+(aq) ---> Fe3+(aq) + e+
</span>
<span> S2O2−6 is being reduced in the process and will have a half reaction of:

</span>S2O2-6 + 4H+ + 2e- ----> <span>2H2SO3
</span>
Adding the two half reactions would yield to the balanced chemical equation. We do as follows:


2 (Fe2+ ---> Fe3+ + e+)
S2O2-6 + 4H+ + 2e- ----> 2H2SO3
----------------------------------------------------------------
2Fe2+ + S2O2-6 + 4H+  ----> 2Fe3+ + 2H2SO3  ( balanced oxidation - reduction reaction )
6 0
3 years ago
Which of the following salts are more soluble in acidic solution than in pure water?
vfiekz [6]
One way to look at it is to determine whether the compound is acidic or basic. basic compounds will dissolve more easily in acid

A) Al(OH)3 is the hydroxide of a metal and this is basic. hence this will dissolve better in acid than pure water ( in fact Al(OH)3 is amphoteric meaning it can dissolve in both acid and base)

B) BaF2 is the salt of a strong base Ba(OH)2 and weak acid HF, hence the nature of BaF2 is slightly basic, this will dissolve better in acidic solution

C) PbCl2 is the salt of weak base Pb(OH)2 and strong acid HCl, hence the nature of PbCl2 is slightly acidic, it won’t be more soluble in acidic solution

D) Hg2Br2 is the salt of weak base Hg2(OH)2 and strong acid HBr. the nature of Hg2Br2 is acidic hence, it wont dissolve better in acidic solution

E) NiS is the salt of a very weak base Ni(OH)2 hence this NiS will be acidic in nature nd wont dissolve in acidic solution

F) AgI is the salt of a very strong acid HI and weak base AgOH. nature will be acidic and wont dissolve in acidic solution



in conclusion only Al(OH)3 and BaF2 are more soluble in acidic solution than in pure water as both are slightly basic
7 0
3 years ago
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