Reference no: EM13675188
This is an environmental science class question, Please help me do that!
Using the given information, solve the subsequent problems the half lives of all the isotopes will require to found using the internet. Please show all the work.
1. A human piece of pottery is dated at 16,750 years old by using carbon-14. Explain how many half lives have passed since the pottery was make?
2. Define what would the percentage of thorium- 232 (parent compound) be in a rock that was dated at 1.4 billion years?
3. Define the concentration of the radioactive isotope potassium-40 in a rock sample is found to be 3.125%. Explain what is the age of the rock?
4. A rock is found to contain 3.2 grams of uranium-235 a radioactive isotope. If the rock has undergone 2.75 half lives, define what was the original amount of uranium-235 in the rock and how old is the rock?
5. An igneous rock originally has 3 grams of uranium-238 in it. When dated, the rock only contains 1.8 grams. Explain what are the parent and daughter concentrations in percentages and what is its age?
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Define what will the total pressure become
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Explain when the gasoline burns of oxygen consumed
: An automobile gasoline tank holds 43kg of gasoline. Explain When the gasoline burns, 151kg of oxygen are consumed as well as carbon dioxide and water are produced.
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Explain what is the mass of the steel bar
: A volume of 110.mL of H2O is initially at room temperature (22.0 °C). A chilled steel rod at 2.00 °C is placed in the water. If the final temperature of the system is 21.1 °C, Explain what is the mass of the steel bar
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Explain how many kilojoules of heat were absorbed
: An ice bag containing 212g of ice at 0°C was used to treat sore muscles. Explain when the bag was removed, the ice had melted and the liquid water had a temperature of 32.5°C. Explain how many kilojoules of heat were absorbed
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Define what would the percentage of thorium- 232
: A human piece of pottery is dated at 16,750 years old by using carbon-14. Explain how many half lives have passed since the pottery was make. Define what would the percentage of thorium- 232 (parent compound) be in a rock that was dated at 1.4 bill..
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Explain when we find the w what temperature we use
: A bottle containing 1kg of water 18.01g/mol is boiled until evaporation is complete. Determine w, q, U, H for the process. Hvap = 40.6kJ/mol. Explain when we find the w what temperature we use (room temperature or 100 C)
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Compute the average atomic mass of the element
: An element has two common isotopes. 98.89% of its atoms have an atomic mass of 12.09amu whereas the other 1.11% have an atomic mass of 13.10amu. Utilizing the isotopic composition provided, compute the average atomic mass of the element
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Explain what is the percent yield of the reaction
: If 1.87 {rm g} of acetic acid (rm CH_3CO_2H) reacts with 2.31 {rm g} of isopentyl alcohol (rm C_5H_{12}O) to give 2.96 {rm g} of isopentyl acetate (rm C_7H_{14}O_2), explain what is the percent yield of the reaction
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Define what is the final concentration of nitrate anion
: Explain In the laboratory a student combines 25.5mL of a 0.203 M sodium nitrate solution with 24.3mL of 0.375 M manganese (II) nitrate solution. Define what is the final concentration of nitrate anion
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