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- A mineral is known as ore if metal(a) Cannot be produced from it(b) Can be produced from it(c) Can be extracted from it profitably(d) Is very costly12.1 g of goztic acid was dissolved in water weighing 87.9 G. The mass fraction (%) of acid in the solution was calculated.please showsolution and explain
- Using the concepts of volumetry, classify statements as true or false. Justify the one(s) that you judge to be “false”. a) Constant weight is to repeat the entire analytical procedure, until 2 consecutive measurements of the scales vary in mass up to 0.002 g b) The nickel dimethylglyoximate precipitate is of the true crystalline type c) Gravimetric factor is the relationship between the mass of starting material and the mass of the product d) In direct determination, volatilization gravimetry, the volatilized sample is collected on a certain (previously determined) mass of appropriate adsorbent material (silica, alumina) and weighed up.A chemist went on a trip to Zambales to obtain a sample of chalcocite (copper (I)sulfide), one of the most important ores of copper. He tried to extract copper fromthe ore by performing these 2 steps: a.) After grinding, the chemist “roasted” (reacted with oxygen gas inthe presence of heat) the powdered chalcocite sample to form a redcuprous oxide precipitate and gaseous sulfur dioxide.b.) He then reacted the red precipitate with hydrogen gas inside aheated furnace to produce metallic copper and water vapor. Question: If the chemist acquired 98.4 grams of chalcocite during his trip, (1) calculate the theoretical yield of metallic copper in his experiment. (2) If the chemist obtained 50.2 grams of metallic copper from his experiment, what is the %yield? answer both question and you'll get 100% rating!! -kathA chemist went on a trip to Zambales to obtain a sample of chalcocite (copper (I)sulfide), one of the most important ores of copper. He tried to extract copper fromthe ore by performing these 2 steps: a.) After grinding, the chemist “roasted” (reacted with oxygen gas inthe presence of heat) the powdered chalcocite sample to form a redcuprous oxide precipitate and gaseous sulfur dioxide.b.) He then reacted the red precipitate with hydrogen gas inside aheated furnace to produce metallic copper and water vapor. Question: If the chemist acquired 98.4 grams of chalcocite during his trip, calculatethe theoretical yield of metallic copper in his experiment.
- The following evidence was obtained from an experiment to determine the molar concentration of a sodium nitrate solution. A sample of sodium nitrate solution was evaporated to dryness and the mass of solid residue was measured.Evidence:Volume of solution = 10.00 mLMass of beaker = 79.54 gMass of beaker and residue = 82.96 gFrom this data, calculate the molar concentration of the original sodium nitrate solution. Record only your numerical answer with the correct number of significant digits. You do not need to include units as the units appear for you beside the answer box already.Complete the following chemical reactions according to the type it belongs to:Pleas don't handwritten solution ...
- State whether the following analysis is quantitative or qualitative analysis or both. i) Determination of percentage uranium in seawater samples. ii) Analysis on the detection heavy metals of lead and nickel and its concentration level from sediments samples in lake. iii) Identifying calcium carbonate in pearl sample from fresh water.Write a step-by- step procedure for the preparation of 500 mL of .350 M LiNO3 solution. You will begin with lithium nitrate, which is a solid at room temperature. When constructing your procedure, be sure to use the preferred types of equipment/glassware. Include the appropriate calculations at the beginning of your procedure.Which produces an electrically conductive solution when dissolved in water? A) CaCl2 B) CCl4 C) C2H5OH D) Ch3F Which formula represents a brittle solid crystalline substance that dissolves in water to form an electrically conductive solution? A) AuCu B) CaCl2 C) NF3 D) SiC A solid is tested for malleability, electrical conductivity, solubility in water, and melting point. It is found to be extremely hard and non-conductive as a solid or liquid. It has a high melting point and does not dissolve in water. How should the substance be classified? A) Ionic Compound B) Metal Alloy C) Nonmetallic Element D) Network Covalent Compound Students observed a compound that was a malleable solid at room temperature. They tested it for electrical conductivity and observed that it conducted in both the liquid and solid states. How should they have classified the compound? A) Ionic B) Metallic. C) Molecular D) Network Covalent