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Aleksandr-060686 [28]
3 years ago
5

In Chef’s famous Beef Wellington, you have to get the pastry just right. According to the recipe, Chef uses 400g of butter. But

Chefs Jacqueline and Amy use ounces and pounds— how much butter should they use?
A)Chef Jacqueline should use ________ oz of butter.


B) Chef Amy should use _________ pounds of butter.
Chemistry
1 answer:
lisabon 2012 [21]3 years ago
5 0

Amount of butter Chef used = 400g

1 g = 0.035274 oz

Therefore, 400 g = 0.035274 x 400 oz = 14.1096 oz

A) Chef Jacqueline should use __14.1096______ oz of butter.

1 g = 0.00220462 pound

Therefore, 400 g =  0.00220462 x 400 pound = 0.881848 pound

B) Chef Amy should use _0.881848________ pounds of butter.

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The following expression, that comes from the 1° law of thermodynamic, will help you to get the work:

w = ΔnRT

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T: Temperature in Kelvin.

As we are doing this reaction in STP, then the Pressure is 1 atm, and temperature is 0 °C or 273 K.

Now, we already have the moles of Cu₂O, let's see, according to the balanced reaction, how many moles we should have of O₂ and CuO.

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If 2 moles of Cu₂O produces 4 moles of CuO, then 6.5 moles will be:

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Δn = 13 - (6.5 + 3.25) = 3.25 moles

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<h2>w = 7376.6 J or 7.3766 kJ</h2>

Hope this helps

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