Chemistry

Di- Ethyl zinc is a chemical used in the library to protect books from worms, its composition is 53% Zinc, 38.9% Carbon, and 8.1% Hydrogen (At mass of Zn=65.4, C=12, H=1). Find the empirical formula of a compound
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Questions1 Explain why a solid expands when it is heated.2 Explain how the liquid in a thermometer changes so that it can be used tomeasure a temperature.3 Use particle theory to explain why solids and liquids cannot be compressed(squashed into a smaller volume).4 Use particle theory to explain why liquids and gases can flow.
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For the reaction 3H 2(g) + N 2(g) 2NH 3(g), K c = 9.0 at 350C. What is the value of G at this temperature when 1.0 mol NH 3, 5.0 mol N 2, and 5.0 mol H 2 are mixed in a 2.5 L reactor?
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A 0.753 g sample of a monoprotic acid is dissolved in water and titrated with 0.250 M NaOH. What is the molar mass of the acid if 21.5 mL of the NaOH solution is required to neutralize the sample?
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methyl phenolphthalein and litmus
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Why are cells important to an organisms survival
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Give two examples of neutralization
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Given the following reaction and data, A + B Products Experiment A (M) B (M) Rate (M/s) 1 1.50 1.50 0.320 2 1.50 2.50 0.320 3 3.00 1.50 0.640Required:a. What is the rate law of the reaction? b. What is the rate constant?
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A solution of HCOOH has 0.16M HCOOH at equilibrium. The Ka for HCOOH is 1.8104. What is the pH of this solution at equilibrium? Express the pH numerically.
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Which are the physical properties of water
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How many moles of steam, H 2 O react with 1 mol of charcoal, Caccording to the balanced chemical equation? C(s)+H 2 O(g)\ \ CO(g)+H 2 (g)
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Calculate the enthalpy change (H) for the reaction- N2(g) + 3 F2(g) > 2 NF3(g) given the following bond enthalpies: NN 945 kJ/mol FF 155 kJ/mol NF 283 kJ/mol
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absorption of digested food takes place in the
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Name four types of salts
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A laboratory assistant needs to prepare 217 mL of 0.246 M solution. How many grams of calcium chloride will she need
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Define freezing....... Correct and detailed answers will be marked as Brainliest.
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A compound is found to contain 31.42 % sulfur, 31.35 % oxygen, and 37.23 % fluorine by weight. To answer the questions, enter the elements in the order presented above. 1. What is the empirical formula for this compound? 2. The molecular weight for this compound is 102.1 g/mol. What is the molecular formula for this compound?
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A 5-column table with 2 rows. Column 1 is labeled number of protons, with entries 20 and 9; column 2 is number of neutrons, with entries 20 and D; Column 3 is atomic number, with entries A and E; Column 4 is Mass Number, with entries B and 19, and Column 5 is Element (symbol) with entries C and F. Using the periodic table, complete the table to describe each atom. Type in your answers
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What wavelength measuresA. Depth B. Distance C. Energy D. Speed E. TimeF. Volume
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Which reaction is typical neutralization reaction? H+ (aq) + OH- (aq) = H2O (g) NaCl (aq) +AgNO3(aq) = AgCl (s) + NaNO3(aq) CuO(s) +H2SO4(aq) = CuSO(4) + H2O(l) NH3(l) +H2SO4(aq) = (NH4)2SO(s)
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Molar mass is reported on the periodic table in the unitsA. kg/m3B. grams/mole.C. moles/gram.D. atoms/gram.
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5. What distinguishes the noble gases from other elements in the main group?How does this contribute to the tendency for the various elements to reactwith each other?
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Which of the following sequences describes how a four-stroke engine cyclepowers the engine?
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the pain reliever codeine is a weak base with a kb equal to 1.6 x 10^-6. what is the ph of a 0.05 m aqueous codeine solution
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