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Question 1BiologySLPaper 1A

Water molecules contain polar covalent bonds due to unequal sharing of electrons. What is the result of this polarity?

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    A1.1 Water

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    Level
    SL & HL
    Question 1SLPaper 1A
    Markscheme
    (a)
    State one property of water that results from hydrogen bonding.[2]
    Question 2HLPaper 1A
    Markscheme
    (a)
    Explain how cohesion allows water to move up a xylem vessel.[3]
    Question 3SLPaper 2
    Markscheme
    (a)
    Outline the role of water as a solvent in transport.[4]

    Follow every step of the solution

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    Step-by-step walkthrough

    Step 1: Find the wavelength

    Use the wave equation from the data booklet and rearrange it for wavelength.

    360=300λ

    Step 2: Make a fraction

    Now express the given separation as a fraction of a full wavelength.

    0.30÷1.20
    write as a fraction
    λd​=1.200.30​
    λd​=0.25
    λd​=41​ of a cycle

    Step 3: Convert to phase

    One complete cycle corresponds to 2Ï€ radians, so take the same fraction of 2Ï€.

    quarter of 2Ï€
    Δϕ=41​(2π)
    Δϕ=2π​ rad

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    Question 2BiologySLPaper 22 marks

    Explain why water has a high specific heat capacity.

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