However, in this experiment, we do not have the information of the oxidation number for iron nails. There are 2 different oxidation numbers for iron; that are 2 or 3. We will need to check each of the equations to find out the moles of each element in the equation. Then we can compare the ratio between the mole and the mass of iron and copper; that will be measured during the experiment.
Check out Freakstimes Blog for many spoof news, satires, and jokes! Chemistry Chemistry is one subject that you can easily score an A in, if you put in effort of course! Below are some tips for studying Chemistry. Tips for studying Chemistry 1. Since there are so many formulae to remember, try writing them out on flash cards.
One formula per card, along with a couple of example questions that require application of this formula. This will make it easier to refer back and revise closer to your exam date.
As with other subjects, you need to practise doing the questions!
Find out the model answers to the questions. Understand what is required of you for each question. Many students tend to veer off when answering questions. So avoid this mistake! Consult your teacher or get a tutor.
Also, learning from your own mistakes is the best way to learn. So do as many questions as you can so you can make all the mistakes you can ever make and then when you go to the real exam, you will not make the same mistakes again.
Make your own study notes! List down all the key terms and definitions for each chapter, all the formulae, and other important information such as the reactivity series. I cannot emphasize this enough - You really should make your own notes.
If you only study from your textbook, it is just like reading from a novel. You get the idea but you will probably find it difficult to recall and apply the facts. Use mnemonic device - check out http: For example, to remember the metal reactivity series, you can use this found it in a chemistry blog.
I also found this chemistry revision checklist which you should use to check against your own progress while you revise your work.
Learning from your own mistakes is good, as I had mentioned earlier. Learning from others' mistakes is a good thing too, and even better when it comes from a Cambridge examiner who can tell you what they are looking for and what mistakes students tend to make.The table below presents an abbreviated geologic time scale, with times and events germane to this essay.
Please refer to a complete geologic time scale when this one seems inadequate. Click the button above to view the complete essay, speech, term paper, or research paper. How to Cite this Page. MLA Citation: The metals are: copper, zinc, aluminium, magnesium, lead, and tin. There was three different ways I could have done this.
I could have tested two different metals in different solutions and. Important Solved MCQs Questions of Everyday Science for PPSC CSS SPSC.
1) One of the countries through which equator passes is: (a) Kenya (b) Malaysia. Table 1 A table of study variables and operationalization of the study variables.
Prediction Given that, powdered Magnesium metal has a high surface area than equivalent lengths of Magnesium ribbon, we predict that the former will have shorter duration of reaction with hydrochloric acid than the latter.
Almonds can be nutritious and tasty as a snack, and useful as a milk substitute. Find out about the benefits, nutritional value, and any risks.
Let’s assume the electrodes are Magnesium and Copper. Magnesium is a strong reducing agent. Electrons from the copper become free as the magnesium indirectly reacts with the copper through the external conducting material.