Answer:
260K
Explanation:
We use the general gas equation to solve this. The mathematical form can be represented as follows:
P1V1/T1 = P2V2/T2
We are to look for T2 from the question, rearranging the equation yields:
T2 = T1P2V2/P1V1
So what information do we have from the question:
T2= ?
P2 = 640mmHg
V2 = 198L
P1 = 760mmHg
T1 = 273K as they gas is at S.T.P since pressure is 760mmHg which is the standard pressure
V1 = 175L
We now substitute all these values:
T2 = (273 * 640 * 198)/(760 * 175)
T2 = 260K
The answer would be Hydrosphere
Hey there!
A half-life means after a certain amount of time, half of that substance will have decayed after that time.
An equation for exponential decay is the following:
y = a(1 - b)ⁿ
Where a is the original amount, b is the rate of decay, and n is time.
1000 is about 0.3 of a half life, 1000 divided by 138 days (3312 hours) is approximately 0.3.
Let's plug in values to that equation:
y = 321(1 - 0.5)^(0.3)
Simplify.
y = 260.73
There will be 260.73mg of polonium-210 remaining after 1000 hours.
Hope this helps!
Answer:
thermochemical equation
Explanation:
A(n)__thermochemical equation_____is a balanced chemical equation that includes the physical states of all reactants and products, and the energy change that accompanies the reaction.
