Recent content by Elizabeth12

Hi I need help with my chemistry homework. I'm stuck on the following questions 1. Very dilute solutions of iron(II) chlodie and iron (II) sulfate have similar colours. Explain how you can distinguish solutions of these compounds. Give full details of the tests you can carry out as well as...

oh i just realized I miss read a part of the question. thanks!

Hi I'm stuck on a homework question on moles. I know the mole formula, but the question doesn't state any needed numbers. Question: Calculate the number of moles of calcium carbonate and hydrochloric acid at the start of the reaction. the reactions is CaCO3+2HCL---CaCl2+CO2+H2O How...

Hi I don't understand the question in my chemistry homework. Homework Statement Describe three different methods of making the soluble salt calcium chloride. For each method describe: suitable reagents that can be used which reagent, if any, is in excess Homework Equations...

Thank you for your help!

The volume of the cylinder is 400 cm cubed. Calculate the surface area of a similar cylinder formed by enlarging the one shown by a scale factor of 2. The height of the cylinder is 10 cm. I don't know how to calculate the surface area, but I know that the area factor is (H/h)squared...

thank you! :)

Homework Statement Plot the result on the grid. Percentage concentration of carbon dioxide: 0.00, 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.14, 0.16, 0.18, 0.20 Rate of photosynthesis in arbitrary units low light intensity: 0, 20, 29, 35, 39, 42, 45, 46, 46,46,... high light intensity...

Hi I need some help with question 4 and 7 on the attachment. How do you do them? Thanks!