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maxonik [38]
3 years ago
11

When copper metal is added to silver nitrate in solution, silver metal & copper (ii) nitrate are produced. What mass of silv

er is produced from 100 g Cu?
Chemistry
1 answer:
Harrizon [31]3 years ago
6 0

Answer:

\large \boxed{\text{339 g}}

Explanation:

We will need a balanced chemical equation with masses and molar masses, so, let's gather all the information in one place.

MM:   63.55                                        107.87

           Cu + 2AgNO₃ ⟶  Cu(NO₃)₂ + 2Ag

m/g:    100

(a) Moles of Cu

\text{Moles of Cu} = \text{100 g Cu }\times \dfrac{\text{1 mol Cu}}{\text{63.55 g Cu}}= \text{1.574 mol Cu}

(b) Moles of Ag

\text{Moles of Ag} = \text{1.574 mol Cu} \times \dfrac{\text{2 mol Ag}}{\text{1 mol Cu}} = \text{3.147 mol Ag}

(c) Mass of Ag

\text{Mass of Ag} =\text{3.147 mol Ag} \times \dfrac{\text{107.87 g Ag}}{\text{1 mol Ag}} = \textbf{339 g Ag}\\\\\text{The reaction produces $\large \boxed{\textbf{339 g}}$ of Ag}

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How many grams of ice at -12.1 ∘C can be completely converted to liquid at 15.2 ∘C if the available heat for this process is 4.4
ra1l [238]

Answer:

The mass of ice is 1,06 kg

Explanation:

Formula for calorimetry:  Q = m . C . ΔT

Formula for phase transition, with latent heat: Q = L . m

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Our unknown value is mass

<em><u>You should look for latent heat of Ice and of course, specific heat of water.</u></em>

Those are constant and they are known.

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4490kJ . 1000 = 449000 J

m. 2,01 J/g°C (0°-(-12,1°C) + 334 J/g .m +m .4,186 J/g°C .(15,2°C - 0°C) = 449000 J

m. 24,321 J/g + 334 J/g .m + 63,62 J/g . m = 449000 J

421,94 J/g . m =  449000 J

m =  449000 J /421,94 g/J = 1064,1 g ---->1,06 kg

8 0
3 years ago
Ammonia is produced industrially via this exothermic reaction.
Cloud [144]

Answer:

high pressure of 200-300 atm.

low temp. of between 400-500 degrees celsius:this is for continuous development of ammonia since it decomposes at high temp fathermore the reaction is exothermic

a catalyst to speed up the rate of reaction:i guess it is finely divided iron impregnated in aluminium oxide

platinum can be used as a catalyst but it is easily poisoned

hope it helps

Explanation:

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3 years ago
At construction sites, workers often reduce erosion by ____.
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<h3><u>Answer;</u></h3>

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Answer:

the mass number

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