Answer:
Molar mass of P₂O₅ = 141.948 g/mol which is approximately 142 g/mol.
Explanation:
Molar mass of AlCl₃
Molar mass = 26.982 + 35.5 × 3 = 133.32 g/mol
Molar mass of BaCl₂
Molar mass = 137.33 + 35.5 × 2 = 208.33 g/mol
Molar mass of MgCl₂
Molar mass = 24.305 + 35.5×2 = 95.305 g/mol
Molar mass of P₂O₅
Molar mass = 30.974×2 + 16× 5 = 141.948 g/mol
For reaction a, the mole number of gas increase from 2 to 4. So the entropy will increase, ΔS>0. For b, the gas will change to solid, so the entropy decrease, ΔS<0.
Answer:
b I think if it's wronged sorry
- The person that was right about the chemical change is Elsa
- Chemical changes can be regarded as one that takes place when chemical reactions occur and there is formation of new product such as chemical elements or compounds .
- Physical change are one that doesn't result to formation of new chemical substances .
- When someone eat because digestion occur due to breaking down of the food by enzymes into the small molecules the and as result of this new product is formed such as urine , energy and others
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<em>Therefore, Elsa is right.</em>
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False it would be freezing point
