Answer : The pressure of hydrogen gas is 8.96 atm.
Explanation :
The given balanced chemical reaction is:
From the balanced chemical reaction we conclude that,
As, 2 moles of Al react to give 3 moles of 
gas
So, 4.50 moles of Al react to give 
moles of gas
Now we have to calculate the moles of gas when percent yield is 75.4.
Now we have to calculate the pressure of gas.
Using ideal gas equation :
PV = nRT
where,
P = Pressure of hydrogen gas = ?
V = Volume of the hydrogen gas = 14.0 L
n = number of moles of hydrogen gas = 5.09 moles
R = Gas constant = 
T = Temperature of hydrogen gas = 300 K
Putting values in above equation, we get:
Therefore, the pressure of hydrogen gas is 8.96 atm.
Given the following choices, determine which best suits as a characteristic of a hurricane.
Answer Choices:
A. Hurricanes occur mostly inland
B. Hurricanes create widespread damage
C. Hurricanes can only last for a short amount of time
D. Hurricanes gain strength after passing overland
Best Answer: B. Hurricanes can create widespread damage.
Reason: A would not be correct since it is more of a variable, due to the fact that hurricanes usually begin near the coastlines, hurricanes are in fact capable of moving inland for atleast 100 miles before it dies down to a tropical storm or depression.
C is not correct since hurricanes can last up to a whole week which is approximately 168 hours.
D is not correct since it is another variable in which hurricanes can decrease in strength if it comes into contact with cool and dry air which is the opposite of warm and moist which it needs in order to occur.
Therefore, the best choice is B. Hurricanes can create widespread damage, hurricanes can unleash a staggering arsenal of mother nature's strength and the most damage a hurricane has caused can go up to 125 billion USD in damages.
Answer:
5.8 g
Explanation:
Molecular weight in Daltons is equivalent to the molecular weight in grams per mole.
The amount of NaCl required is calculated as follows:
(2 mol/L)(50 mL)(1 L/1000 mL) = 0.1 mol
This amount is converted to grams using the molar mass (58 g/mol).
(0.1 mol)(58 g/mol) = 5.8 g
Diffusion is the movement of a substance from an area of high concentration to an area of low concentration . Diffusion happens in liquids and gases because their particles move randomly from place to place . Diffusion is an important process for living things ; it is how substances move in and out of cells .
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