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What happened to the kinetic energy of the particles in a sample of gas as the temperature of the sample increase?
As the temperature of a gas sample increases, the kinetic energy of the gas particles also increases. This is because temperature is a measure of the average kinetic energy of the particles in the sample. Therefore, an increase in temperature corresponds to an increase in the average kinetic energy of the gas particles in the sample.
How much of a 100-g sample of thorium-234 will be unchanged after 48.2 days?
25 gExplanation:Think about what a nuclear half-liferepresents, i.e. the time needed for an initial sample of a radioactive substance to be halved.
If a fixed sample of gas increases in temperature it must also do what?
If a fixed volume of gas increases in temperature, it must increase in volume. If the gas is in a closed system, the pressure inside that system increases instead. When the gas increases in volume, it also decreases in pressure, often rising above colder, more dense gas if possible.
What is true about the speed of molecules in a sample of gas held at a constant temperature?
At a constant temperature, the average kinetic energy of the molecules in a gas sample remains constant. This means that while individual molecules may move at various speeds, the average speed is directly related to the temperature. As temperature increases, the average speed of the molecules also increases, and vice versa. However, at a constant temperature, the distribution of speeds can vary, but the average kinetic energy will stay the same.
When a fixed sample of gas increases in volume what happens to the pressure and temperature?
The frequency of collisions is reduced
What happens to the partial pressure of oxygen in a sample of air when the temperature increases?
When the temperature of a sample of air increases, the partial pressure of oxygen also increases.
A sample of the radioisotope potassium-40 is crushed to increase its surface area. The temperature of the sample is then lowered 25C. What affect do these changes have on the rate of nuclear decay?
Crushing the sample increases the surface area, which exposes more atoms to decay, leading to an increase in the rate of nuclear decay. Lowering the temperature decreases the kinetic energy of the atoms, which may decrease the rate of nuclear decay slightly due to decreased collisions among the atoms.
What happened to the kinetic energy of the particles in a sample of gas as the temperature of the sample increase?
As the temperature of a gas sample increases, the kinetic energy of the gas particles also increases. This is because temperature is a measure of the average kinetic energy of the particles in the sample. Therefore, an increase in temperature corresponds to an increase in the average kinetic energy of the gas particles in the sample.
What is the room temperature of nobelium?
Being very radioactive probably nobelium is hot; but we have not a sufficient sample to test this hypothesis.
How much of a 100-g sample of thorium-234 will be unchanged after 48.2 days?
25 gExplanation:Think about what a nuclear half-liferepresents, i.e. the time needed for an initial sample of a radioactive substance to be halved.
If a fixed sample of a gas increases in temperature at a constant pressure its volume does what?
If a fixed sample of gas increases in temperature at constant pressure, its volume will also increase. This is because as the temperature increases, the particles in the gas gain more kinetic energy and move faster, causing them to collide with the container walls more frequently and with greater force, thus occupying a larger volume.
As a sample of a radioactive element decays its half-life?
The half-life of a radioactive element is the time it takes for half of the atoms in a sample to decay. As the sample decays, the number of radioactive atoms decreases while the number of stable atoms increases. The process continues in this manner, with each half-life reducing the amount of radioactive material by half.
If a fixed sample of gas increases in temperature it must also do what?
If a fixed volume of gas increases in temperature, it must increase in volume. If the gas is in a closed system, the pressure inside that system increases instead. When the gas increases in volume, it also decreases in pressure, often rising above colder, more dense gas if possible.
An increase in the average kinetic energy of a sample of copper atoms occurs with an increase in what?
An increase in the average kinetic energy of a sample of copper atoms occurs with an increase in temperature. Temperature is a measure of the average kinetic energy of the particles in a substance, so as temperature increases, the particles (such as copper atoms) gain more energy and move faster, which increases their kinetic energy.
What must be true for radioactive dating to be possible with a certain sample?
For radioactive dating to be possible, the sample must contain a measurable amount of a radioactive isotope with a known decay rate. The sample must be isolated from sources of contamination that could affect the accuracy of the dating. Additionally, the sample must have remained a closed system since the radioactive isotopes were incorporated, in order to accurately measure the decay products.
How do you calculate the activity of a radioactive sample?
The activity of a radioactive sample is calculated using the formula: Activity = λ*N, where λ is the decay constant of the isotope and N is the number of radioactive nuclei present in the sample. The unit of activity is becquerel (Bq).
What happens to the thermal energy of a substance as its temperature increases?
As the temperature of a substance increases, its thermal energy also increases. This leads to greater kinetic energy of the particles within the substance, causing them to move faster and creating more thermal energy.
