<u>Answer:</u> The number of moles of gas present are 0.390 moles
<u>Explanation:</u>
To calculate the number of moles of gas, we use the equation given by ideal gas which follows:
where,
P = pressure of the gas = 0.868 atm
V = Volume of the gas = 11 L
T = Temperature of the gas =
R = Gas constant =
n = number of moles of gas = ?
Putting values in above equation, we get:
Hence, the number of moles of gas present are 0.390 moles
Given :
Mass of O₂, m = 25.43 g.
To Find :
How many liters of gas will you have at STP.
Solution :
Molecular mass of O₂, M.M = 2 × 16 gram/mole
M.M = 32 gram/mole
Number of moles is given by :
n = m/M.M
n = 25.43/32 mole
n = 0.79 mole
Hence, this is the required solution.
Common clastic sedimentary rocks are listed on the table below. They are listed by grain size in descending order. Grain size is one factor in classifying sedimentary rocks.Clicking on the name of the rock will bring up a larger picture and a description of the rock type in a new window.
It's answer B) endothermic reaction ;)
The molar mass if NaCl is 58.44 g/ mol, hope this helps :)