Answer:
18.0 g of mercury (11) oxide decomposes to produce 9.0 grams of mercury
Explanation:
Mercury oxide has molar mass of 216.6 g/ mol. It gas a molecular formula of HgO.
The decomposition of mercury oxide is given by the chemical equation below:
2HgO ----> 2Hg + O₂
2 moles of HgO decomposes to produce 1 mole of Hg
2 moles of HgO has a mass of 433.2 g
433.2 g of HgO produces 216.6 g of Hg
18.0 of HgO will produce 18 × 216.6/433.2 g of Hg = 9.0 g of Hg
Therefore, 18.0 g of mercury (11) oxide decomposes to produce 9.0 grams of mercury
Answer:
Moles = Molecules / (6.0221415 x 10^23)
Explanation:
Answer:
ΔH is negative and ΔS is negative.
Explanation:
Endothermic reaction -
The type of reaction in which energy is absorbed in the form of heat is known as endothermic reaction .
The reaction mixture usually get cooled after the reaction .( temperature decreases ) .
The sign of ΔH of an Endothermic reaction is positive .
<u>For the of process of freezing the liquid ethanol , energy in the form of heat is released and hence , exothermic reaction ΔH is negative .</u>
<u>In the process of freezing , liquid is converted to solid , i.e. , the randomness reduces , and hence , entropy also decreases , hence , ΔS is negative .</u>
Geraldo can add a pollutant with slightly basic nature so he will have a solution of neutral pH of 7.
<h3>What is pH?</h3>
The pH of a solution is the negative logarithm to base ten of the hydrogen ions concentration of the solution.
The pH of 6.5 means that the solution is acidic.
By adding a pollutant which is slightly basic in nature, Geraldo will have a solution of neutral pH which is a pH of 7.
Learn more about pH at: brainly.com/question/24595796
61g/mol
Explanation:
The empirical formula of compound is its simplest formula. It shows the simplest ratio by which the atoms are combined.
In the formula C₄H₁₀O₄
we have:
4 moles of carbon 10 moles of hydrogen 4 moles of Oxygen;
4 : 10 : 4
The simplest ratio can be obtained by dividing through by the highest common factor which is 2;
4/2 10/2 4/2
2 5 2
the empirical formula is C₂H₅O₂
The formula mass is the sum of the atomic weights;
C₂H₅O₂ = (2 x 12) + (5x1) + (2x 16) = 24 + 5 + 32 = 61g/mol
learn more:
Molar mass brainly.com/question/2861244
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