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20kg of ammonium nitrate is made from ammonia and nitric acid, what mass of ammonia was used?

The given equation is - NH 3 + HNO 3 --> NH 4 NO 3 Equation to use - Moles = Mass/RFM RFM of ammonium nitrate = 14 + 4 + 14 + (3x16) = 80 20kg = 20000g Moles of ammonium nitrate = 20000/80 = 250 Mole rati...
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Why could the government not just print more money in the Weimar Republic? (in reference to the hyper-inflation crisis)

Printing more money became the issue. The word 'inflation' itself refers to when prices are rising but the value of money is falling.Inflation in the Weimar Republic largely came about because the government...
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Answered by Sophie E. • History tutor
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Solve the simultaneous equations 5x + y = 21 x - 3y = 9

To solve simultaneous equations we want to use only one variable so either x or y. Therefore we need to eliminate (get rid of) one of the variables .If you multiply x - 3y = 9 by 5 you will get 5x - 15y = 45...
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Answered by Amelia H. • Maths tutor
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Describe how water moves from the roots to the leaves

The xylem tissue that runs from the roots to the leaves draws water up from the roots as water evaporates from the leaves. This process is called transpiration it is how water is replaced when water evaporat...
Answered by • Biology tutor
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How should I approach answering moles calculation questions?

The key to answering any moles calculation question in chemistry is working out which equation you need to use. Generally, if moles are involved it will be moles = volume x concentration or moles = mass/RFM....
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