Answer:
940 J
Explanation:
This is a calorimtetry excersie where you apply the formula
Q = C . m . ΔT
We only have 2 data from here, C and ΔT (from the solution)
C → 3.97 J/g°C
ΔT → 2.3°C
We determine the solution's mass by density:
1.03 g/mL = Solution mass / Solution volume
We assume the HCl as the solution volume → 100 mL
1.03 g/mL . 100 mL = 103 g → solution's mass
We replace data: Q = 103 g . 3.97 J/g°C . 2.3°C → 940.4 J
The answer:
<span>the overall balanced equation for the precipitation reaction occurring between silver nitrate and calcium bromide:
</span>CaBr2 + AgNO3-----------> AgBr2 + CaNO3, so among the given choices, the
true answe is
<span>agno3(aq)+cabr2(aq) (as reactants)</span>
<span>1) The electron configuration of Re is [Xe] 4f14 5d5 6s2
</span>
<span>The ion Re (3+) has lost 3 electrons, so its configuration is </span><span>[Xe] 4f14 5d4
</span>
Then, the number outer-shell d electrons is 4.
<span>2) Sc: [Ar] 3d1 4s2
</span>
Sc (3+) has lost 3 electrons -> <span>[Ar] which has not d electrons.
</span>
<span>Then, the number of d electrons is 0</span>
<span>3) Ru: [Kr] 4d7 5s1
</span>
Ru (4+) has lost 4 electrons -> <span>[Kr] 4d4
</span>
Then, the number of outer-shell d electrons is 4
<span>4) Hg: [Xe] 4f14 5d10 6s2
</span>
Hg (2+) has lost 2 electrons -> <span>[Xe] 4f14 5d10
</span>
<span>Then, the number of outer-shell d electrons is 10</span>
The outer core and the core because S waves can only travel through solid objects, not liquids.