Answer:
0.4 moles of water produced by 6.25 g of oxygen.
Explanation:
Given data:
Mass of oxygen = 6.25 g
Moles of water produced = ?
Solution:
Chemical equation;
2H₂ + O₂ → 2H₂O
Number of moles of oxygen:
Number of moles = mass/ molar mass
Number of moles = 6.35 g/ 32 g/mol
Number of moles = 0.2 mol
Now we will compare the moles of oxygen with water:
O₂ : H₂O
1 : 2
0.2 : 2×0.2 = 0.4 mol
0.4 moles of water produced by 6.25 g of oxygen.
Explanation:
NH4OH(aq) ---> NH4+(aq) + OH-(aq)
Answer:
Thermal food sterilization and pasteurization are the most widespread preservation technologies to extend food shelf life by inactivating microorganisms and enzymes that can deteriorate foodstuffs.
ANSWER: boiling water
Explanation: the others are physical changes
