Explain why a lithium ion (Li+) is smaller than a lithium atom (Li).
2 answers:
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Answer: 778 ml
Explanation:
To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,
where,
are the initial volume and temperature of the gas.
are the final volume and temperature of the gas.
We are given:
Putting values in above equation, we get:
Thus volume the gas occupy at 30.0°C is 778 ml
Answer:
1. 2 C₃H₅N₃O₉(l) ⇒ 3 N₂(g) + 1/2 O₂(g) + 5 H₂O(g) + 6 CO₂(g)
2. 146 g of nitroglycerin.
Explanation:
<em>1. Write a balanced chemical equation, including physical state symbols, for the decomposition of liquid nitroglycerin ( </em><em>C₃H₅N₃O₉</em><em>) into gaseous dinitrogen, gaseous dioxygen, gaseous water and gaseous carbon dioxide.</em>
The equation is:
C₃H₅N₃O₉(l) ⇒ N₂(g) + O₂(g) + H₂O(g) + CO₂(g)
Since atomicities in nitroglycerin are odd, it is easier to balance this equation by multiplying this compound by 2. The balanced equation is:
2 C₃H₅N₃O₉(l) ⇒ 3 N₂(g) + 1/2 O₂(g) + 5 H₂O(g) + 6 CO₂(g)
<em>2. Suppose 41.0L of carbon dioxide gas are produced by this reaction, at a temperature of −14.0°C and pressure of exactly 1 atm. Calculate the mass of nitroglycerin that must have reacted.</em>
First, we have to find the moles of CO₂ using the ideal gas equation.
P.V = n . R . T
where,
P is the pressure
V is the volume
n is the number of moles
R is the ideal gas constant (0.08206atm.L/mol.K)
T is the absolute temperature (-14.0 °C + 273.15 = 259.2 K)
According to the balanced equation, 6 moles of CO₂ are formed when 2 moles of C₃H₅N₃O₉ react. And the molar mass of nitroglycerin is 227 g/mol. Then, for 1.93 moles of CO₂: