I think it might be 2 but I could be mistaken sorry if I am
Temperature and pressure are directly proportional. Pressure will also have to increase ( doubling).
Answer:

Explanation:
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In this case, since the percent water is computed by dividing the amount of water by the total mass of the hydrate; we infer we first need the molar mass of water and that of the hydrate as shown below:

Thus, the percent water is:

So we plug in to obtain:

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