10 cm of 0.10 mol dm- aqueous iron (II) sulphate is titrated against 0.025 mol dm-3 aqueous potassium manganate (VII) in the presence of an excess of both hydrogen ion and
fluoride ions. It is found that exactly 10 cm of the manganate (VII) solution is required to
reach the end point. What is the oxidation number of the manganese at the end point.​

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Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane

Can anyone explain 1. review your spectrometry data and use the known elements to identify the star's composition. which unknown elements make up this star? justify your element selections. 2. in parts i and ii of the lab, what happened to the electrons of each element to produce the different colors of light? explain your answers using important terms from the lesson and information provided in the laboratory. 3. stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. based on your data, is the newly discovered star a younger star? explain your answer.