<span>Winnipeg have a higher annual temperature gradient than Vancouver because water heats more slowly and can store more heat than land.Winnipeg has a cold continental climate with a short, very warm summer and a long, cold winter. Despite the cold weather, Winnipeg;s skies are among the clearest</span>
Answer:
original activity is 3600 cpm
Explanation:
3 half-lives = 450 cpm
2 half-lives = 900 cpm
1 half-life = 1800 cpm
answer = 3600 cpm
Answer:
It can reduce soil erosion by %50 compared to up and down hill farming.
Explanation:
By reducing sediment and runoff and increasing water infiltration, contouring promotes better water quality.
2.89 moles of water would be produced by the complete combustion of 44.5 grams of ethanol in the presence of excess oxygen.
- According to this question, the following reaction between ethanol and oxygen is given:
- C₂H₆O(l) + O₂(g) → CO₂(g) + H₂O(l)
- However, this equation is not balanced. The balanced equation is as follows:
- C₂H₆O + 3O₂ → 2CO₂ + 3H₂O
- According to this equation, 1 mole of ethanol produces 3 moles of water.
- We convert 44.5g of ethanol to moles by dividing by its molar mass as follows:
- mole = 44.5g ÷ 46.07g/mol
- mole = 0.966mol of ethanol
- If 1 mole of ethanol produces 3 moles of water.
- 0.966mol of ethanol will produce (0.966 × 3) = 2.89mol
- Therefore, 2.89 moles of water would be produced by the complete combustion of 44.5 grams of ethanol in the presence of excess oxygen.
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Explanation:
dry wooden spoon destabilizes the bubbles when they come into contact with its water-repelling surface. This makes the boiling water retreat. ... The wooden spoon, being considerably cooler than 100°C, thus works to break the bubbles and make the foam retreat