<span>chemicals reacting are written on the left, what is formed is written on the right after the = sign
eg Copper + oxygen = copper oxide.
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Answer:
Final pressure = 0.77atm
Explanation:
The concept used to approach this question is the Ideal gas equation
PV = nRT
where P = pressure
V = Volume
n = number of mole or amount of substance
R = ideal gas constant
T = Temperature in Kelvin
- from the parameters given ; mass = 391g
- Temperature = 695 ∘C = 695 + 273 = 968K
- number of moles = mass/molar mass
- molar mass of CO2 = 12 + 2x16 = 44g/mol
- number of moles = 391g/44g/mol = 8.886mol
plugging into the equation to get the final pressure,
- P = nRT/V = 8.886 x 0.0821 x 968 / 0.770
Answer:
volume = 1.04 dm^3
Explanation:
Data:
volume = ?
Molarity, M = 0.25M
mass = 28.5g
Molar mass = 110.25g
Moles = ?
Solution:
First find number of moles,
moles = mass in gram / molar mass
= 28.5 / 110.25
= 0.258
≈ 0.26 moles
Now,
Molarity =
So,
Volume in dm^3 =
= 0.26 / 0.25
Volume = 1.04 dm^3
Answer:
156 Hydrogen atoms
Explanation:
<u>Any acyclic alkane has a molecular formula that can be expressed as</u>:
CₙH₂ₙ₊₂
Where <em>n</em> is any integer and the number of carbon atoms. For example, Propane has 3 carbon atoms, this means it would have [2*3+2] 8 hydrogen atoms, resulting with a formula of C₃H₈.
An acyclic alkane with 77 carbon atoms would thus have:
2*77 + 2 = 156 hydrogen atoms