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CuCl2 + 2NaOH --> Cu(OH)2 + 2NaCl. 100kg of CuCl2 reacts with excess Sodium Hydroxide. 50kg of Sodium Chloride is produced. Calculate the theoretical yield of Sodium Chloride, and hence the percentage yield of Iron in this reaction.

Theoretical Yield of NaCl = 86.7kg (3sf)Percentage Yield of Iron = 57.7% (3sf)
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Answered by Vishvan N. • Chemistry tutor
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How do you find dy/dx for a set of parametric equations?

Using the chain rule:If the parameter used is 't', differentiate each equation with respect to 't' so that you have answers for dy/dt, and dx/dt.From the chain rule it is known that: "dy/dx=dy/du * du/d...
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Answered by Federico C. • Maths tutor
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expand and simplify x(3x-2)(x+1)

first expand the brackets (3x-2)(x+1) to get 3x 2 -2x+3x-2, then we can simplify this to get 3x 2 +x-2.Then multiply this by x to get the final answer: 3x 3 +x 2 -2x.
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Answered by Natalia A. • Maths tutor
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Bananas cost 30p each. Oranges cost 45p each. Write an expression, in pence, for the cost of x bananas and y oranges..

Each banana cost 30p so the total price for bananas will be "number of bananas x 30". Here, bananas are called by the variable x so this number can be written as "30x" and will change dep...
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Answered by Léa P. • Maths tutor
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Describe the life cycle of a virus.

Attachment. A virus, for example a bacteriophage attaches to the surface receptor of the host bacterial cell.Penetration. The virus injects the viral DNA genome through the cell wall and the cell membrane an...
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Answered by Celine A. • Biology tutor
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