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hur kan vi skydda oss mot koksalt?
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What threats does H2So4 have on water?
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1.) At 40 degrees Celsius CH2O2(aq) will decompose according to the following reaction: 2H2O2(aq) ----- 2H2O(l) + O2(g) The following data were collected for the concentration of H2O2 at various...
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2. The temperature of 55.6 grams of a material decreases by 14.8 degrees C when it loses 3080 J of heat. What is its specific heat?
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2. The temperature of 55.6 grams of a material decreases by 14.8 degrees C when it loses 3080 J of heat. What is its specific heat?
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An equilibrium mixture, at 594 C in a 1342-mL container, involving the chemical system N2(g) + 3H2(g) 2NH3(g) is found to contain 9.72 g of N2, 0.674 g of H2, and 0.385 g of NH3. Calculate the equilibrium constant (Keq expressed in terms of the molar concentrations) at the given...
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How many J of energy must be removed when 156.0 g of steam, at a temperature of 155.0 C, is cooled and frozen into 156.0 g of ice at 0 C? Take the specific heat of steam to be 2.1 kJ/(kg K)
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equation of hydrolysis of aplha-d-maltose
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a 1 l buffer solution with ph 9.05 is desired. one of the two ingredients of the buffer is hcn. what could the other compound be? Suggest a suitable ratio and determine the exact moles of the two compounds to achieve the desired pH
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A rolling axle, 1.50 m long, is pushed along horizontal rails at a constant speed v=3.00 m/s. A resistor R=0.400 is connected to the rails at points a and b, directly opposite from each other. ( the wheels make good electrical contact with the rails, so the axle, rails, and R form a closed-loop...
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Sample Questions
- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
- 2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)
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