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A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and chemical formulas.The reactant entities are given on the left-hand side and the product entities are on the right-hand side with a plus sign between the entities in both the reactants and the products, and an arrow that points towards the products to show the direction of the reaction. [1]
For example, one year a candidate may only need 62 raw marks to get an A grade (80%), but another year 62 marks may only be equivalent to a B grade (70%). This means that it is possible for candidates to achieve full UMS marks in an exam, even if they didn't receive full marks in the actual exam.
The exam is the most extensive of the GCSE science boards; made up of nine papers and three practical exams. For each of biology, chemistry and physics there are three papers and one practical exam: Paper 1 is one hour long, Paper 2 is one hour and fifteen minutes, Paper 3 is a practical skills paper and is thirty minutes long, and the ...
For subjects like Physics, Chemistry, Biology, Home Science, Mathematics, Geography, etc. for which practical exams are also conducted, 30/20 marks are reserved for practicals and internals and 70/80 marks for the theory exams. In 2020, even for non-science/lab-based subjects, CBSE issued guidelines to conduct internal assessment for 20 percent ...
In aqueous solution, ammonia deprotonates a small fraction of the water to give ammonium and hydroxide according to the following equilibrium: . NH 3 + H 2 O ⇌ NH + 4 + OH −.. In a 1 M ammonia solution, about 0.42% of the ammonia is converted to ammonium, equivalent to pH = 11.63 because [NH +
Oil prices bounced around quite a bit in 2024. They rallied more than 20% at one point -- topping $85 per barrel -- before cooling off toward the end of the year. Oil was recently below $70 a ...
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics. This article contains the list of certain mnemonics in chemistry.
This week, investors digested bitcoin's rally above $100,000, Intel's leadership shakeup, and monthly jobs data that keeps the Fed on track to cut interest rates.