Chemistry Homework Assistance

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5. An investigation was carried out into the effect of mathrm(pH) on pepsin activity. Four experiments were set up as shown in the diagram below at mathrm(pH) 2,5,7 and 10. 10 mathrm(~cm) glass tube containing solidified protein of egg white The table below shows the lengths of the protein after one hour at each mathrm(pH) . rho H & }(c) length (mathrm(cm)) 2 & 6 5 & 8 7 & 9 10 & 10 What is the optimum mathrm(pH) for pepsin? A mathrm(pH) 2 B. mathrm(pH)

Which particles within an atom have a relative mass of 1? (Select all that apply) Protons Electrons Neutrons

Which of the following are true of the rate of reaction? Unit is s/g Dependent on the mass of product Can be calculated Dependent on the type of product Unit is g/s Is an abstract concept

At what approximate temperature range is the entire sample of lithium in the liquid phase? Heating Curve of Lithium The graph shows a science experiment in which a sample of solid Lithium is heated at a constant rate. During both the melting and boiling phase changes, it was observed that the temperature remained the same. Heating Curve of Lithium A from -500^circ mathrm(C) to 0^circ mathrm(C) B from 0^circ mathrm(C) to 100^circ mathrm(C) C from 300^circ mathrm(C) to 1,300^circ mathrm(C) D from 1,500^circ mathrm(C) to 2,500^circ mathrm(C)

(iii) Complete the sentence. Atoms of carbon have no overall electrical charge because the number of protons is the same as the number of __