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Radon has a half-life of approximately 4 days If you have a sample of radon with a mass of 4 grams how many grams will be left at the end of 8 days Is it 4 2 1 or none of these?
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What is the density of a sample that has a mass of 36 grams and a volume of 12 milliliters?
Density = mass/volume, so:36 grams/ 12 milliliters3 grams/ milliliter
Does a pen weigh 10 grams or 100 grams?
A pen would weigh approximately 10 grams. 100 grams would be about 100 grams of feathers.
How many grams are there in one pennyweight?
One pennyweight is approximately equal to 1.555 grams.
150 lbs equals how many grams?
150 pounds approximately equals 68,038.855 grams
What is 7.42 grams rounded to two significant figures?
Rounded to two significant figures, 7.42 grams is approximately equal to 7.4 grams.
How many grams are in a 6.94 mole sample of sodium hydroxide?
The molar mass of sodium hydroxide (NaOH) is approximately 40 grams per mole. Therefore, a 6.94 mole sample of sodium hydroxide would contain approximately 278 grams (6.94 moles x 40 grams/mole).
How many atoms are in a 12.0 grams sample of sodium?
There are approximately 6 x 10^22 atoms in a 12.0 gram sample of sodium.
If a sample of 26 marbles has a mass of 55 grams and a volume of 22 milliliters what is the density of that sample?
The density of the sample can be calculated by dividing the mass by the volume. In this case, 55 grams divided by 22 milliliters is approximately 2.5 grams per milliliter.
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.
How Many Halflife Are These In A 100-year Span How Many Grams Of The Sample Would Remain At The End Of The 100 Years?
If the substance has a half-life of 10 years, there would be 10 half-lives in a 100-year span. Each half-life reduces the amount by half, so after 100 years, 1/2^10 = 1/1024 grams of the sample would remain.
What is the weight of radium?
The weight of radium can vary depending on the specific isotope. For example, the most common isotope, radium-226, has an atomic weight of approximately 226 grams per mole.
How many days are required for 200 grams of radon-222 to decay to 50 grams?
7.64 it is the half life of radon-222 multipled by 2
A sample of seawater has a mass of 158 grams and a volume of 156ml what is its density?
The density of the seawater sample is calculated by dividing the mass (158 grams) by the volume (156 ml). Therefore, the density of the seawater sample is approximately 1.01 grams per milliliter.
What is the volume of a 17.6 grams sample of lead?
To find the volume of a sample of lead, you need to know its density. The density of lead is 11.34 grams per cubic centimeter. You can calculate the volume by dividing the mass of the lead sample by its density. In this case, the volume of a 17.6 gram sample of lead would be approximately 1.55 cubic centimeters.
How many grams of Ti are found in a 0.65 mole sample?
To determine the mass of Ti in a 0.65 mole sample, you need to know the molar mass of titanium. Titanium's molar mass is approximately 47.87 g/mol. Multiply the number of moles (0.65) by the molar mass (47.87 g/mol) to find the mass of titanium in the sample. So, 0.65 mol * 47.87 g/mol = approximately 31.1 grams of Ti in the sample.
What is the atomic number of radon?
The atomic number of radon is 86, which means that radon has 86 protons in its nucleus.
The volume of a sample of water is 20cm3 the mass of?
In order to determine the mass of the water sample, you would need to know the density of water. The density of water is approximately 1 g/cm3. Therefore, the mass of a 20 cm3 sample of water would be 20 grams (20 cm3 * 1 g/cm3 = 20 grams).
