significant figures. 7) Determine the empirical formula of the rodenticide warfarin (a carbon-hydrogen-oxygen compound)‚ which consists of 74.01% C and 20.76% O by mass. 8) Selenium forms two oxides. One has 28.8% O by mass and the other has 37.8% O. What are the formulas of these two oxides? 9) Adenine is a carbon-hydrogen-nitrogen compound with 44.45% C and 3.73% H by mass. It’s molecular mass is 135.14 u. What is its molecular formula? 10) Combustion of a 0.312 g sample of a
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precipitates to see if the solubility rules apply or if there were exceptions. Results: See table below Discussion: I formed an idea of different ionic reactions and how they can differ. Questions: B. Yes C. Carbonates‚ Phosphates‚ sulfides‚ oxides or hydroxides form precipitates. Alkali metal hydroxides are the exceptions. D. Most salts. E. Group one and two cations F. A1. Cobalt nitrate with Sodium phosphate. CO(NO3)2+6 H2O+Na3PO4+12 H2O Na3+PO2Co(NO3)2+18 H2OD5. Ba(N03)2 - NaHC03
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chemical reaction were used in the next reaction. The process starts with a solid copper wire dissolved in nitric acid and the end product is copper powder. The product which was used from the previous reaction is the limiting. In the initial step‚ the solid copper is the limiting reactant. For this experiment‚ the materials that will be used are copper wire‚ aluminum wire‚ six molar nitric acid‚ sodium hydroxide‚ six molar hydrochloric acid‚ a vacuum filtration apparatus‚ and ice. Experimental
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In this experiment‚ we have silver oxide and by using a bunsen burner‚ we will drive off all of the oxygen in the compound. We will do this by heating the silver oxide until the substance’s mass stays constant to know when all of the oxygen possible has been driven out. This process will occur through a series of heating and remassing. Silver oxide has many uses from batteries to military purposes. In a silver-zinc battery‚ silver oxide acts as the cathode and zinc as the anode. This battery is
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purpose of the lab is to discover what happens when someone executes a series of procedures‚ beginning with copper metal. What is done | What is observed | 1. Started with copper‚ Cu (s). | reddish‚ brownish‚ orange-ish‚ powder-like | 2. Added nitric acid‚ HNO3 (aq). | acid turns blue and smells like chlorine. | 3. Added water‚ H2O (l). | stayed the same | 4. Added sodium hydroxide‚ NaOH (aq). | changed consistency‚ gel-like | 5. Heated the mixture | becomes darker‚ dark-brown-like‚ shavings
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different ways.” Ingredients such as nicotine‚ carbon monoxide‚ and carcinogens can cause cancer‚ lack of oxygen‚ lower amounts of antioxidants and many more. The third source is the effects of cigarette smoke on plants. “Sulfur dioxide and nitrogen oxide‚ as well as the numerous particulates that are in cigarette smoke can cause plants harm and affect their growth patterns. Particulates stick to the stems and leaves of plants‚ making it more difficult to absorb light.” The next source talks about
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atmosphere by ________. A) nitrogen dioxide B) ozone C) iron D) AIDS E) ultraviolet light Answer: E 7) When a part of the body is injured‚ substances called ________. are released. A) aspirins B) pain relievers C) nitrogen oxides D) chlorofluorocarbons E) prostaglandins Answer: E 8) The production of smog from the chemical NO requires ________. A) nitrogen B) chlorine C) water D) oxygen E) CFCs Answer: D 9) When scientific information
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Nitrogen Family (The traditional name for the elements in Nitrogen’s column‚ the “pnictogens”‚ comes from a Greek word for “choking” or “strangling”) P.7 Nitrogen: Fritz Haber discovered how to convert the Nitrogen in the air into an industrial product. Although nitrogen gas can suffocate those who are unsuspecting‚ tends to be benign‚ almost to the point of uselessness. The one important thing it can do is replenish the soil; it is as important to plants as vitamin c is to us. When pitcher
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exploziei. The most commonly used oxidizers are nitrates‚ the major component of black powder. Nitrates are composed of nitrate ions (NO3-) with metal ions. The most common oxidizer is potassium nitrate‚ which decomposes to potassium oxide‚ nitrogen gas‚ and oxygen gas. Oxidantii utilizati cel mai frecvent sunt nitratii‚ componenta majora a pulberii negre. Nitratii sunt compusi din ioni nitrati (NO3-) cu ioni metalici. Oxidantul cel mai comun este azotatul de potasiu care se
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Q.1 Bond enthalpy of fluorine is lower than that of chlorine‚ why? Q.2 Give the IUPAC name of the following compound: (CH3)3-C-C-COOH ║ O Q.3 On increasing temperature‚ activation energy of a reaction decreases‚ why? Q 4 Which of the following is most effective electrolyte in the coagulative of AgI/Ag+sol? K2SO4‚ MgCl2‚ K4[Fe(CN)6] Q.5 Write the reaction when glucose is heated with excess of HI. Q.6 Which Xe compound has distorted octahedral shape? Q.7 What is the denticity of
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