Please help! I don’t know how to calculate reacting masses
Answers
Answer:
Mass of phosphoric acid = 6.37 g
Mass of magnesium nitride = 50.5 g
Mass of iron chloride = 22.71 g
Explanation:
1 = Given data:
Mass of phosphorus = 4 g
Mass of phosphoric oxide = ?
Solution:
4P + 5O₂ → 2P₂O₅
Number of moles of phosphorus = mass / molar mass
Number of moles of phosphorus = 4 g / 31 g/mol
Number of moles of phosphorus = 0.13 mol
Mole ration of phosphorus and phosphoric acid.
P : P₂O₅
4 : 2
0.13 : 2/4× 0.13 = 0.065 mol
Mass of phosphoric acid:
Mass of phosphoric acid = moles × molar mass
Mass of phosphoric acid = 0.065 mol × 98 g/mol
Mass of phosphoric acid = 6.37 g
2 = Given data:
Mass of magnesium = 36 g
Mass of magnesium nitride = ?
Solution:
3Mg + N₂ → Mg₃N₂
Number of moles of magnesium = mass / molar mass
Number of moles of magnesium = 36 g / 24 g/mol
Number of moles of magnesium = 1.5 mol
Mole ration of magnesium and magnesium nitride.
Mg : Mg₃N₂
3 : 1
1.5 : 1/3× 1.5 = 0.5 mol
Mass of magnesium nitride:
Mass of magnesium nitride = moles × molar mass
Mass of magnesium nitride = 0.5 mol × 101 g/mol
Mass of magnesium nitride = 50.5 g
3 = Given data:
Mass of iron = 8 g
Mass of iron chloride = ?
Solution:
2Fe + 3Cl₂ → 2FeCl₃
Number of moles of iron = mass / molar mass
Number of moles of iron = 8 g / 55.85 g/mol
Number of moles of iron = 0.14 mol
Mole ration of iron and iron chloride.
Fe : FeCl₃
2 : 2
0.14 : 0.14
Mass of iron chloride:
Mass of iron chloride = moles × molar mass
Mass of iron chloride = 0.14 mol × 162.2 g/mol
Mass of iron chloride = 22.71 g
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Answers
Answer is: B. Heat transfers to his body from the water by conduction.
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Answers
Answers
Aluminum and nitrogen combines together through ionic bonding to form aluminum nitride AlN. Thus, the type of bonding here is ionic bond.
What is ionic bonding?
Ionic bonding is the strongest bond type formed between a metal and nonmetal. Metals are electrons rich and can easily lose electrons to form their higher oxidation states.
Non-metals up to group 17 are electrons deficient and they need one or more electrons to attain stability or to fulfill the octet. Metals donate electrons to non-metals forming ionic bonds.
Eve though aluminum is placed with non-metals it shows metallic properties which is classified into 13th group thus, having 3 valence electrons. Nitrogen is 15th group element with 5 valence electrons and thus, need 3 more electrons to attain octet.
Therefore, Al donates it 3 valence electrons to nitrogen forms an ionic bond between them and hence, form the ionic compound aluminum nitride AlN.
To find more on aluminum nitride, refer here:
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