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A curve has the equation (5-4x)/(1+x)

Start by looking for intercepts.x=0, y= 5. Therefore the curve crosses the y axis at y=5y=0, x= 5/4these are the only two intercepts. Now look for asymptotes.3. at x= 1, y becomes undefined, looking at eithe...
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When 80.0cm^3 of 0.500 M hydrochloric acid was added to 1.75g of impure CaCO3, not all HCl reacts. The unreacted HCl required 22.4 cm^3 of a 0.500 M solution of NaOH for complete reaction. Calculate percentage by mass of CaCO3 in the impure sample.

Balanced equations: CaCO 3 + 2 HCl --> CaCl 2 + H 2 O + CO 2 , HCl + NaOH --> NaCl + H 2 O HCl moles that react overall: (80.0 cm 3 x 0.500 mol dm 3 ) / 1000 dm 3 cm -3 = 4.00 x 10 -2 mol HCl moles tha...
Answered by • Chemistry tutor
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What is the difference in the evaluation of a study versus a theory?

When evaluating studies, you are assessing how useful the findings of the studies are in explaining the key question within the topic. Therefore, all evaluation points need to refer to the strengths and limi...
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Answered by Junior O. • Psychology tutor
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What's the moment of a force and why would I need to understand it?

Mathematically you'd express it as M=F x d, Moment = Force times distance (from the pivot), unit being Nm, Newtons times meters. Simply speaking, it's how you quantify an object's ability to rotate around it...
Answered by • Physics tutor
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'The Weimar constitution of 1919 was no more democratic than the Bismarckian constitution of 1871.' Discuss

Interesting question inviting you to compare, contrast and evaluate. Consider what the question is asking you to do - ultimately it wants you to evaluate how 'democratic' the two German constitutions were - ...
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Answered by Anna H. • History tutor
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