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In Stage 2 of a reaction, 40 kg of titanium chloride was added to 20 kg of sodium. The equation for the reaction is: TiCl4 + 4Na -> Ti +4NaCl Relative atomic masses (Ar): Na = 23 Cl = 35.5 Ti = 48 Explain why titanium chloride is the limiting reactant.

To calculate which of titanium chloride or sodium is limiting, convert both into mol so they are directly comparable. You cannot compare in masses because in equations there is a conservation of moles and no...
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Answered by Simran L. • Chemistry tutor
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Describe the lac operon, and it's transcriptional control when the concentration of glucose is low, and the concentration of lactose is high.

The lac operon is a section of DNA in E. Coli that consists of a promoter , operator and three genes encoding Beta-galactosidase , lactose permease and another gene. Beta galactosidase is an enzyme responsib...
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Answered by Albert T. • Biology tutor
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factorise 2x^2 - x - 6

2x 2 - x - 6 = (2x+3)(x-2)
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Answered by Hazel T. • Maths tutor
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write 560000 in standard form

5.6 x10^5
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Answered by Hazel T. • Maths tutor
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Simplify sqrt(12)

12 = 4 3Therefore sqrt(12) = sqrt(4 3) The square root of the product of two numbers can the written as the product of the square roots of the numbersHence sqrt(4*3) = sqrt(4) * sqrt(3) sqrt(4) = 2 So sqrt(4...
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Answered by Hazel T. • Maths tutor
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