Please read those three pages of article and Write summary and finish some questions.
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A voltaic cell consists of a hg/hg22+ electrode (e°= 0.85 v) and a sn/sn2+ electrode (e°= –0.14 v). calculate [sn2+] if [hg22+] = 0.24 m and ecell = 1.04 v at 25°c.
How many distinguishable slip systems are represented by {111} < 1 1 0 > in nickel at room temperature? explain?
(111) A hypothetical element xylo(symbol Xy) forms four different compounds with another hypothetical elemnent phone(symbol Ph). Using the old nomenclature, write the empirical formula for each compound. (a) xylo monophonide (b) dixylo triphonide (c) dixylo tetraphonide (d) xylo diphonide (112) Using the formulas from question 111, dtermine the oxidation values for Xy and Ph and […]
Please help if you have time: determine the percentage by mass of Chromium in the ore. I got the moles cro4- then divided by 2 to get moles of fe(cro2)2 because it’s 4:2 ratio. Mark scheme doesn’t do this. When j got 0.034 mol I divided by 2 but mark scheme keeps it as 0.034. […]
Investigations were carried out in a science lab to explore the topic of chemical and physical changes. Investigation A Step 1. Add 5 tsp. salt to 100 ml warm water and stir until most or all of the salt is no longer visible. Step 2. Heat the salt solution on a burner until only a […]
assume you have 500 g sample of a radioactive isotope with a half life of 100 years, how many grams of material will remain after 1 , 2 , and 3 number of half lives have passed.
Charissa says that bread goes through a chemical change when it is toasted. Which of the following observations would least support her conclusion? A. a change in the smell of the bread B. a change in the color of the bread C. a change in the texture of the bread D. a change in the […]
Select the answer with the correct number of significant figures for each calculation. 31.580 + 4.26 = 35.8 35.84 35.840
