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How old is a rock for which you determine that 55 percent of the original uranium-238 remains while the other 45 percent has decayed into lead?
Mkinsie444
3.88 billion years
Wiki User
∙ 6y ago
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Determine the percent sulfur by mass in so3?
the percent sulfur by mass in so3 is 40.050%
If an Isotope has a 75 year half life how long until the parent isotope has decayed to 1 percent of the initial number?
It will take between 450 and 525 years.
What percent is left of our rainforest?
There is only about 4 or so percent left of the original rainforest. So not uch, less than a 3rd
Determine how much of each of the following NaCl solutions in grams contains 1.5g of NaCl 0.058 percent NaCl by mass?
In order to determine this, it is necessary to know what solution we are looking at. One we know that we can look at the grams in a mole of the substance and determine the percentages based on molecular weight.
Determine what mass of Potassium Iodide should be dissolved in 200 g of water to make a 3.0 percent solution?
3% = 3 g solute / 100 g water So, for 200 g water, you will need 2X3 g = 6 grams potassium iodide This assumes that what's meant is "weight percent", sometimes abbreviated as "w/w %" or "wt %". It would be highly unusual for a chemist to specify the concentration as a percent.
Where can the most mass be found in an atom?
Essentially all of the atom's mass is in the nucleus. In the lightest atom, that of hydrogen, it's about 99.95 percent. In the heaviest naturally occurring atom, that of Uranium238, it's about 99.979 percent.
How do you determine the percent change?
You have an original value and a new value. Take the new value and subtract the original value. Then divide that number by the original value.
If 100 us pennies equals 1 us dollar determine the value of one thousand percent of ten thousand percent of 5 pennies.?
1,000 percent = 10 times the original value.10,000 percent = 100 times the original valueso 10 * 100 * 0.05 = $10.00
How do you determine the original number from a total that has 20 percent added to it?
Divide the total by 1.2 Example: If the inflated total is $273, the original price was 273/1.2 = $227.50 .
Jaime purchased a used car on sale for 3450. The original price of the used car was 4100. Write a expression that can be used to determine the percent of the original price that she saved on purchase?
((4100 -3450)/4100) x 100
Determine the percent platinum in cisplatin PtCl2NH32?
65 percent
How many Percent does the original remains of the Philippine Forest have?
20 percent of the original remains of the Philippine forest
What is the percentage germination and how can one determine it?
the percent is x100 and you can determine it by caculating
What percent expresses a 5 percent decrease in the original whole?
95% You simply subtract the decrease from the original 100%.
How do you do Percent of change?
percent of increase-new-original over originalthen make the decimal a percent of increasepercent of decrease-original-new over originalthen make the decimal a percent of decrease
How do you do percent change?
percent of increase-new-original over originalthen make the decimal a percent of increasepercent of decrease-original-new over originalthen make the decimal a percent of decrease
What is the percent decrease from 220 to 33?
Percent Decrease = (Original Amount - New Amount)/(Original Amount) * 100% The percent decrease from 220 to 33 is 85%
