Well you didn’t post any but I’m hoping that either plastic, lead, wood, glass, or paper, are an option.
Answer:
Amount left after 25 days = 12.5 g
Explanation:
Given data:
Mass of sample = 400 g
Half life of sample = 5 days
Mass left after 25 days = ?
Solution:
First of all we will calculate the number of half lives passes in given time period.
Number of half lives = Time elapsed / Half life
Number of half lives = 25 days/ 5 days
Number of half lives = 5
At time zero = 400 g
At 1st half life = 400 g/2 = 200 g
At 2nd half life = 200 g/2 = 100 g
At 3rd half life = 100 g/2 = 50 g
At 4th half life = 50 g/2 = 25 g
At 5th half life = 25 g/2 = 12.5 g
Answer: The atomic radius of a hydrogen atom is 742=37 pm 74 2 = 37 pm .
Explanation:
Answer:
This relationship between temperature and pressure is observed for any sample of gas confined to a constant volume. If the temperature increases by a certain factor, the gas pressure increases by the same factor.
Answer:
E 3.0 x 10² mL.
Explanation:
Hello there!
In this case, according to the formula for the calculation of the mass-volume percent:
Whereas it is necessary to know the mass of the solute and the volume of the solution. Thus, given the mass of NaOH as the solute, the volume of the solution would be:
Then, by plugging in we obtain:
Thus, the answer is E 3.0 x 10² mL.
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