Answer:
the answer is Matter for the first one the second one is a chemical bond
Explanation:
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Answer:
<u>The Standard enthalpy of reaction:</u>
Explanation:
Given- Standard Heat of Formation:
= -3110 kJ/mol,
= -286 kJ/mol,
= -1279 kJ/mol
<u><em>Given chemical reaction:</em></u> P₄O₁₀(s) + 6H₂O → 4H₃PO₄
<em>The standard enthalpy of reaction:</em> = ?
<u><em>To calculate the Standard enthalpy of reaction</em></u> (), <u><em>we use the equation:</em></u>
<u>Therefore, the Standard enthalpy of reaction:</u>
Answer:
d) el niño would lead to the death of organisms or populations
Explanation:
Answer:
Mass of Ag produced = 64.6 g
Note: the question is, how many grams of Ag is produced from 19.0 g of Cu and 125 g of AgNO3
Explanation:
Equation of the reaction:
Cu + 2AgNO3 ---> 2Ag + Cu(NO3)2
From the equation above, 1 mole of Cu reacts with 2 moles of AgNO3 to produce 2 moles of Ag and 1 mole of Cu(NO3)2.
Molar mass of the reactants and products are; Cu = 63.5 g/mol, Ag = 108 g/mol, AgNO3 = 170 g/mol, Cu(NO3)2 = 187.5 g/mol
To determine, the limiting reactant;
63.5 g of Cu reacts with 170 * 2 g of AgNO3,
19 g of Cu will react with (340 * 19)/63.5 g of AgNO3 =101.7 g of AgNO3.
Since there are 125 g of AgNO3 available for reaction, it is in excess and Cu is the limiting reactant.
63.5 g of Cu reacts to produce 108 * 2 g of Ag,
19 g of Cu will react to produce (216 * 19)/63.5 g of Ag = 64.6 g of Ag.
Therefore mass of Ag produced = 64.6g