Answer:
C) 75.78 g
Explanation:
Given parameters:
Volume of cloud = 94.2L
Molar mass of water = 18.02g/mol
Unknown:
Mass of water = ?
Solution:
Water is the bulk component of a cloud. To solve this problem, let us find the number of moles of the water using the relationship below first;
Number of moles of water =
Number of moles of water = = 4.21moles
Now to find the number of moles;
Mass of water = number of moles of water x molar mass
= 4.21 moles x 18.02g/mole
= 75.78 g
Half life means is the amount of time only half the uranium is left. So after 68.9 years only 150/2 = 75 g is left. Another 68.9 years go by and then 75/2 = 37.5 g remains. See the pattern here?
then you can divide 250 by 68.9 to see how many times it's halved or just write the equation:
A = 150(0.5)^(t/68.9)
t is 250 years, A is amount left
A = 150(0.5)^(3.63)
A = 12.13 g
Answer:
Pretty sure this is wrong but worth a shot
Explanation:
Ethyl Alcohol is a clear, colorless liquid with a wine-like odor. It is used in alcoholic . Do not rely on odor alone to determine ... This chemical is on the Special Health Hazard Substance. Ethyl Alcohol can affect you when inhaled and by passing through the Ethyl Alcohol may form an ignitable vapor/air mixture in.