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How many days are required for 200 grams of radon 222 to decay to 50.0 grams?
Radon-222 has a half-life of about 3.8 days. To calculate the time required for 200 grams of radon-222 to decay to 50 grams, you can use the formula: [N = N_0 \left(\frac{1}{2}\right)^{\frac{t}{t_{1/2}}}] where N is the final amount (50 grams), N0 is the initial amount (200 grams), t is the time in days, and t1/2 is the half-life. Solving for t gives around 7.6 days.
If 100 grams of salt is removed from a container each day how long will it take to empty a 4kg container?
To find out how long it will take to empty a 4 kg container by removing 100 grams of salt each day, first convert 4 kg to grams: 4 kg = 4000 grams. Next, divide the total amount of salt by the daily removal rate: 4000 grams ÷ 100 grams/day = 40 days. Therefore, it will take 40 days to empty the container.
How many kilogram make a pounds?
A pound is a size of the "old days" and is not what one could/would count as being accurate. It has been standardized as being 453.59237 grams in the US but different countries has got different grams to it. In Denmark one Pound equals 500 grams. For Denmark one pound is exactly 0.5 Kilograms. For US, one pound is 0.45359237 Kilograms.
30 gram of a radioactive substance that has a half-life of 2 days after 2 days how much will be left?
With radioactive decay, predicting when any individual atom will decay is nearly impossible. However, when a lot a particles are present, then it is possible to get a general idea of how much will decay in a certain period of time. The half-life is this measurement, and it is the time that it takes for one halfof the substance to decay. Hence half-life or how long it takes for half to "die".For any size sample of a substance, the half-life is how long it takes for half to be left, so for a substance with a half-life of 2 days, half of the substance will decay in two days. Therefore your answer is simply half of 30g which is 15g.Additional reading: http://simple.wikipedia.org/wiki/Radioactive_decay
What day will the days get shorter in 2009?
In 2009, the days would start getting shorter after the summer solstice, which occurs around June 21st. This is because the amount of daylight gradually decreases as the Earth's axial tilt leads to shorter days in the Northern Hemisphere.
How many grams of Thorium would be left after ninety six days if there were 4 grams to start with?
This depends on the half life of a specific isotope; I suppose that you think to Th-234 - the mass will be 0,25 g.
Chaser-381 has a half life of 2 days if you start with 8 grams of chaser-381 how much would you have left after eight days?
Eight days would be four half-lives. One-half to the fourth power is one-sixteenth. So you would have half a gram left.
Radioactive iodine 131 has a half life of eight days The amount of a 200.0 gram sample left after 32 days would be?
You start with 5 grams- every 8 days, half of what is there goes away. At 8 days. there will be 2.5 grams. At 16 days, half of THAT is gone- now down to 1.25 grams. At 24 days, half of THAT is gone, leaving 0.625 grams. At 32 days, you have half of 0.625 grams. so divide .625 by two and you get .3125.
How many days are required for 200 grams of radon-222 to decay to 50.0 grams?
7.64 days
How many days does it take for 32 grams of palladium -103 to decay to 2.0 grams the half - life of palladium -103 is 17 days?
It would take 51 days for 32 grams of palladium-103 to decay to 2.0 grams. This calculation involves multiple half-lives, as every 17 days half of the remaining material decays. By dividing the initial mass by 2 repeatedly until you reach 2.0 grams, you find that it takes 3 half-lives for the decay to occur.
Will I pass my urine test if I did 3.5 grams of coke three days before the test?
Not likely.I'm sorry to say but even 4 days you would fail.
How many weekends are in 108 days?
There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.There are 15 full weeks and 3 days in 108 days, so there would be 15 weekends and possibly 16, depending on what day of the week you start counting from.
What would happen if you didn't sleep for 5 days?
you will start to hallucinate.
How many days before your expected period should you start wearing pads?
since i have not started i think 5 days before u start would be a good start for wearing pads
How many days are in six months of a year?
That will depend on the 6 months. It can be anything from 181 to 184 days. For example, in a non-leap year you have the follow sets: From the start of January to the end of June is 181 days. From the start of February to the end of July is 181 days. From the start of March to the end of August is 184 days. From the start of April to the end of September is 183 days. From the start of May to the end of October is 184 days. From the start of June to the end of November is 183 days. From the start of July to the end of December is 184 days. In a leap year January to June and February to July would both be 182 days.
A 100 gram sample of a radioactive element is present at 9 a.m. on Monday and only 25 grams of the element can be detected at 9 a.m. on Friday. What is the half-life of the source?
The half-life is 2 days. You start with 100 grams. In one half life, you will lose 50 grams and have 50 grams remaining. In a second half-life, you will lose 25 of the 50 grams and have 25 grams left. You will have lost 75 grams of a 100 gram sample of radioactive material and have only 25 grams of it left after two half-lives. That means there are two half-lives from 9 a.m. Monday to 9 a.m. Friday. That's 4 days for 2 half-lives, or 2 days for one half-life.
You missed your taking your pills for 5 days then your period came do you keep taking your pills or start another pack?
i would start another pack 5 days woaw
