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3 years ago

A nugget of GOLD has a mass 9.66 gram and a volume of 0.5 cm3, It's density isgrams/cm3 *

Chemistry

1 answer:

dalvyx [7]3 years ago

4 0

Answer:

P=19.32g/cm³

Explanation:

m=9.66g

v=0.5cm³

P=mass/volume (density formula)

=9.66/0.5

=19.32g/cm³

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4 years ago

A solution of 100.0 mL of 0.200 M KOH is mixed with a solution of 200.0 mL of 0.150 M NiSO4. (a) Write the balanced chemical equ

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Answer:

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Explanation:

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2KOH + NiSO₄ → K₂SO₄ + Ni(OH)₂ (1)

b) The precipitate formed is Ni(OH)₂

c) The limiting reactant is:

$n_{KOH} = V*M = 100.0 \cdot 10^{-3} L*0.200 mol/L = 0.020 moles$

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d) The mass of the precipitate formed is:

$n_{Ni(OH)_{2}} = \frac{1}{2}*n_{KOH} = \frac{1}{2}*0.020 moles = 0.010 moles$

$m = n*M = 0.010 moles*92.72 g/mol = 0.927 g$

e) The concentration of the SO₄²⁻, K⁺, and Ni²⁺ ions are:

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$C_{Ni^{2+}} = \frac{0.020 moles}{0.300 L} = 0.067 M$

I hope it helps you!

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4 years ago

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3 years ago

A nugget of GOLD has a mass 9.66 gram and a volume of 0.5 cm3, It's density isgrams/cm3 *​

A nugget of GOLD has a mass 9.66 gram and a volume of 0.5 cm3, It's density isgrams/cm3 *