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Determine the number of grams of KNO3 that will dissolve in 1.0x10^2grams of H2O at 100 degrees C
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2.30) The element lead (Pb) consists of 4 naturally occurring isotopes with atomic masses 203.97302, 205.97444, 206.97587, and 207.97633amu. The relative abundances of these 4 isotopes are 1.4, 24.1, 22.1, and 52.4%, respectively. From these data, calculate the atomic weight of lead.
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2.30) The element lead (Pb) consists of 4 naturally occurring isotopes with atomic masses 203.97302, 205.97444, 206.97587, and 207.97633amu. The relative abundances of these 4 isotopes are 1.4, 24.1, 22.1, and 52.4%, respectively. From these data, calculate the atomic weight of lead.
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O2 + NO2 If 0.740 g of O3 reacts with 0.670 g of NO, how many grams of NO2 will be produced?
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The water level in a graduated cylinder initially at 223 rises to 277 after a piece of lead is submerged. What is the mass in grams of the lead?
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1. Use the following answers for questions 1 - 3. (A) F (B) S (C) Mg (D) Ar (E) Mn 1. Forms monatomic ions with 2 charge in solutions 2. Forms a compound having the formula KXO4 3. Forms oxides that are common air pollutants and that yield acidic solution in water
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Draw a figure for the molecular view of H2+ O2 product 2H2O
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Express in scientific notaition: 405,789
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While in Europe, if you drive 119 per day, how much money would you spend on gas in one week if gas costs 1.10 per liter and your car's gas mileage is 29.0 ? Assume that 1 euro=1.26 dollars
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3.337 g/cm3= ? kg/cm3
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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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