Master Chemistry with Fun Quizzes & Brain Teasers!

A rock contains one-fourth of its original amount of potassium-40. The half life of potasium-40 is 1. 3 billion years. Calculate the rocks age
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Write your answer to the following prompt within the space provided. Be sure to answer all parts. Prompt:In the 1970s, Benjamin Stacey was born with methemoglobinemia (rr). Neither of Benjamins parents were affected by the genetic condition and none of his three siblings showed signs of blue skin, lips, or nails. Since this condition is passed down by genetic traits, his mother was genetically tested and was determined to have a heterozygous genotype (Rr) for methemoglobinemia. Part A: Determine the genotype for his father and possible genotypes for his three siblings. Provide a brief explanation of your reasoning. Part B: If Benjamin Stacey were to marry and have children with a woman affected by methemoglobinemia, predict the probability of their children inheriting this condition. Provide a brief explanation of your reasoning
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You will use a filter funnel in this experiment to .
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How many calories are in 3 grams of peanuts if the following data are collected?Mass of peanut burned = 0. 75 gThe volume of water heated = 50 mLTemperature change = 14. 5 Ca) 2900 calb) 43. 5 calc) 10. 88 cald) 725 cal
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You have one test tube which contains a white solid that is either agcl (s) or pbcl2 (s). select a reagent that will allow you to differentiate between the two chemical species. if the solid is agcl, what will happen when the reagent is added
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Which type of feature forms suddenly where intense compression deforms the rock in an area?A. A series of rock layers cut by a normal faultB. A depression that forms a lakeC. A mountain made of volcanic rockD. A mountain range with folded layers of rock
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Certain amounts of the hypothetical substances A2 and B are mixed in a 3. 00 liter container at 300. K. When equilibrium is established for the reaction the following amounts are present: 0. 200 mol of A2, 0. 400 mol of B, 0. 200 mol of D, and 0. 100 mol of E. What is Kp, the equilibrium constant in terms of partial pressures, for this reaction
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1. 98 g of calcium chloride and 3. 75 g of sodium oxide are combined. Theoretically,what mass of solid product could be formed from these amounts of reactants? Whatis the limiting reactant?
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Write a conversation between you and your friend about a job agency and it's reliability.
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Find the volume of a figure round the answer to the nearest hundred 4cm 4cm 4cm
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Gaseous butane (CH3(CH2)2CH3) will react with gaseous oxygen (02) to produce carbon dioxide (CO2) and gaseous water (H2O). Suppose 34.g of butane s mixed with 200. g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.
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. A ring with a mass of 25.5 g appears to be pure silver. Rather than test for density, you can confirm the ring's composition by determining its specific heat. Suppose the ring is heated to a temperature of 84.0C and then immersed in a container of water until the ring's temperature is 25.0C. If the ring gives up 667.5 J of energy to the water, what is its specific heat? Is the ring made of silver (C = 0.234 J/g C), nickel (C = 0.444 J/g. C), or palladium (C = 0.244 J/g C) help me
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Calculate the cell potential for the galvanic cell in which the given reaction occurs at 25 C, given that [Ti2+]=0.00140 M and [Au3+]=0.887 M . 3Ti(s)+2Au3+(aq)3Ti2+(aq)+2Au(s)
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What do not have true leaves or roots
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2 MnI2 + 13 F2 - 2 MnF3 + 4 IF5Write the conversion factor to use when converting moles of MnIz to moles of F2
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Complete the following reactiona. HN03 + KOH -->. +. b. HCl + LiOH -->. +. c. H2S + NaOH -->. +
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Check all the following combinations of elements that would not form a covalent bond. 1. C and H 2. N and CI 3. S and CI 4. Na and O 5. Cu and O
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Which part of the decay will take the most time?the decay of U-238 to Th-234the decay of Th-234 to Ra-226the decay of Ra-226 to Po-214the decay of Po-214 to Pb-206
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You want to completely boil 500g of water that is at 15C. How much energy is needed to accomplish this?
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Which is the only plate has all margins as convergent boundaries
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A solution consisting of 11. 4 g NH4Cl in 150 ml of water is titrated with 0. 20 M KOH. a. How many milliliters of KOH are required to reach the equivalence point?b. Calculate {Cl-], [K+], and [NH3] at the equivalence point. Assume volumes are additive
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B) Express the answer to this multistep calculation using the appropriate number of significant figures: 87. 95 feet x 0. 277 feet +5. 02 feet - 1. 348 feet + 10. 0 feet.
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2. A Snickers bar is burned in a bomb calorimeter containing 3500 grams of water causing a72C temperature change. How many joules are there in a bar?
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A 983. 6 g sample of antimony undergoes a temperature change of +31. 51 C. The specific heat capacity of antimony is 0. 049 cal/(gC). How many calories of heat were transferred by the sample?
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