Please ive been stuck on this one forever
1 answer:
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Answer:
Age of the atifact is years
Explanation:
- For first -order radioactive decay-
represents activity of radioactive nuclide after t time,
represents initial activity of radioactive nuclide and
represents half-life
- Here,
,
and
Plug-in all the given values in the above equation-
or,
So, age of the atifact is years
Explanation:
Molar mass of HBr = 81 g/mol
Molar mass of nitrogen dioxide gas = 46 g/mol
Molar mass of ethane = 30 g/mol
Graham's Law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows the equation:
So, the gas with least molar mass will effuse out fastest from the container and that is ethane gas.
The formula for average kinetic energy is:
where,
k = Boltzmann’s constant =
T = temperature = 273.15 K ( at STP)
As we can see from the formula that kinetic energy depends upon only temperature of the gas molecule.
So, from this we can say that all the gas molecules have the same average kinetic energy at this temperature.