Please help me.. *A 5.0 g coal sample is given for analysis. After subjecting it to hot air oven at 107 oC for 1 hour, it lost 15% of its weight. Calculate the amount of moisture in the sample * a. 0.15 g b. 0.75 g c. 0.30 g d. None of the above
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Please help me..
*A 5.0 g coal sample is given for analysis. After subjecting it to hot air oven at 107 oC for 1 hour, it lost 15% of its weight. Calculate the amount of moisture in the sample *
a. 0.15 g
b. 0.75 g
c. 0.30 g
d. None of the above
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- Determine the percentage Fe in a sample of limonite from the following data:Sample : 0.5000g ; KMnO4 used = 50.00 ml ; 1.000ml of KMnO4 is equivalent 0.005317 g Fe,FeSO4 used = 6.00 ml; 1.000ml FeSO4 is equivalent 0.009200 g FeO ( ans 44.59 %)Suppose you have a soil that is made up of 10% organic matter with CEC = 200 cmol/kg, 40% kaolinitewith CEC = 10 cmol/kg, and 50% vermiculite with CEC = 100 cmol/kg.1- Calculate the overall CEC of the soil by taking a weighted average of the three soil components.2- What percentage of the overall CEC is contributed by the organic matter? How does that numbercompare to the 10% of the soil itself that is organic?Method of separation/chemical reaction (with the brief process) of 3 KG's OF SODIUM BORATE AND 1.5 KG's HYDROCHLORIC ACID
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- Can elastic hose use for pumping and transferring concentrated solution of CH3COOH for long time? If not let explain why and propose at least two types of material which are properly used in this case.If to a solution of NaOH, in water and ethanol (20 ° C) 3 mmol of A (106.11 g / mol) and 2 mmol of B (58.06 g/ mol) and stirred magnetically for 10 minutes. After the reaction is completed, we proceed to isolate (work- up) and purify at C (246.29 g/ mol) yielding 0.300 g of the pure product. Calculate the% return for C showing his work. please show every single step and calculationsA student was tasked to perform gravimetric analysis of a soluble sulfate. His unknown sample weighed 0.7543 g. The sample underwentprecipitation using BaCl2 and was digested for overnight. The precipitate was then filtered off to obtain white crystalline precipitate that was collected inan ash less filter paper. In performing constant weighing, he obtained a crucible mass that is 29.9442 g. After burning his samples inside the crucible,the obtained mass was 30.3375 g. Compute for the theoretical % SO3 obtained by the student and the theoretical mass (g) of SO3 that should be obtained by the student using his weighed sample
- A student was tasked to perform gravimetric analysis of a soluble sulfate. His unknown sample weighed 0.7543 g. The sample underwentprecipitation using BaCl2 and was digested for overnight. The precipitate was then filtered off to obtain white crystalline precipitate that was collected inan ash less filter paper. In performing constant weighing, he obtained a crucible mass that is 29.9442 g. After burning his samples inside the crucible,the obtained mass was 30.3375 g.29. Compute for the mass (g) of BaSO4 from the experiment.A) 0.3933B) 0.3393C) 0.3133D) 0.3951E) 0.359130. Compute for the experimental mass (g) of SO3 in grams obtained by the student.A) 0.1439B) 0.1349C) 0.1943D) 0.1394E) 0.359131. Compute for the experimental % SO3 obtained by the student.A) 73.21B) 56.33C) 17.89D) 56.89E) 72.8032. Compute for the theoretical % SO3 obtained by the studentA) 0.3933B) 56.37C) 17.33D) 17.89E) 0.425233. Compute for the theoretical mass (g) of SO3 that should be obtained by the student…dont provide handwritiing soution ...A sample of iron ore weighing 800 mg was treated with HNO3 , boiled to dryness and redissolved in dilute HCl. After filtration and removal of undissolved silica, the liquid was passed through a Walden reductor. The collected sample was titrated with 0.0210 M KMnO4 , requiring 12.0 mL to reach the end point. Calc %Fe (55.845) in the ore.
