Answer:
19.2g
Explanation:
The equation of the reaction is;
Li3N(s) +3H2O(l) ---->NH3(g) +3LiOH(aq)
From Avogadro's law we know that 1 mole of any gas occupies a volume of 22.4 L under standard conditions.
It is also clear from the equation that 1 mole of lithium nitride produces 1 mole of ammonia occupying 22.4L volume
Hence;
1 mole of Lithium nitride yields 22.4 L of ammonia
x moles of lithium nitride yields 12.26L of ammonia
x= 12.26×1/22.4
x= 0.55 moles of lithium nitride
Molar mass of lithium nitride= 34.83 g/mol
Mass of lithium nitride = number of moles × molar mass
Mass of lithium nitride= 0.55 moles × 34.83 g/mol
Mass of lithium nitride = 19.2g
Kinetic-molecular theory explains the behavior of matter as result of the movement of tiny particles named molecules (group of atoms in a defined ratio).
The molecules in a solids (as the ice cubes) are very close to each other and have a very limited movement. The particles vibrate and oscilate but do not translate, their translation speed is zero. The intermolecular forces are high.
When a solid melts (ice cubes transform in liquid water) the molecules start to separate, the intermolecular forces decrease and the molecules gain speed. Yet the intermolecular forces are high enough to keep prevent the independent movement of the molecules (in a gas the intermolecular forces have decreased so much that the gas molecules move independently of each other)
Because chemicals they blow up
Answer:
1. The Earth's orbit around the Sun is an ellipse, but it does change shape. ...
The tilt in the axis of the Earth is called its obliquity
Explanation:
2.Volcanic eruptions pump out clouds of dust and ash, which block out some sunlight.