An environmental science class

Assignment Help Chemistry

Reference no: EM13322886

An ENVIRONMENTAL SCIENCE CLASS question, Please help me do that!
Using the given information, solve the following problems( the half lives of all the isotopes will need 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. How many half lives have passed since the pottery was make?

2. What would the percentage of thorium- 232(parent compound) be in a rock that was dated at 1.4 billion years?

3.The concentration of the radioactive isotope potassium-40 in a rock sample is found to be 3.125%. 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, 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. What are the parent and daughter concentrations ( in percentages) and what is its age?

Reference no: EM13322886

Questions Cloud

Write a class that encapsulates a deck of cards : Write a class (and a client class to test it) that encapsulates a deck of cards. A deck of cards is made up of 52 cards. You should have three instance variables.

Define how many moles are present in the tank : If 8.0 moles of the gas A is placed in a 60.0 L tank with 1.0 moles of B at 0 degrees celsius and 1 atm, they react according to the equation. 2A(g) + B(g) ---> 3C(g) + D(g) How many moles are present in the tank when the reaction is complete

How many kilojoules of heat were absorbed : An ice bag containing 212g of ice at 0 °C was used to treat sore muscles. When the bag was removed, the ice had melted and the liquid water had a temperature of 32.5°C.How many kilojoules of heat were absorbed?

Produce the result as the user instructed on the screen : Produce the result as the user instructed on the screen with appropriate messages.

An environmental science class : An ENVIRONMENTAL SCIENCE CLASS

How many mosquitos are required : The random noise level of a buzzing mosquito is 32dB and that heard in a typical classroom is 71dB. How many mosquitos are required to make a noise level equivalent to that heard ina typical classroom

Construct a dfa that recognizes languages : Construct a DFA that recognizes each of the following languages. Unless otherwise noted we are assuming that ω ∈ {0,1}*. (A drawing of a state diagram is sufficient.)

Write the program with at least two functions to solve : Write the program with at least two functions to solve the following problem.

Find the w what temperature : A bottle containing 1 kg of water (18.01g/mol) is boiled until evaporation is complete. Find w, q, U, H for the process. Hvap = 40.6kJ/mol. My question is when we find the w what temperature we use (room temperature or 100 C)

User Account

All Pages