The number of mole of lithium, Li needed for the reaction is 3.2 moles (Option D)
<h3>Balanced equation </h3>
4Li + N₂(g) → 2Li₂N
From the balanced equation above,
2 moles of Li₂N were obtained from 4 moles of Li
<h3>How to determine the mole of lithium needed </h3>
From the balanced equation above,
2 moles of Li₂N were obtained from 4 moles of Li
Therefore,
1.6 moles of Li₂N will be obtained from = (1.6 × 4) / 2 = 3.2 moles of Li
Thus, 3.2 moles of Li are needed for the reaction
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Answer:
Density,
Explanation:
Given that,
Mass of the sample, m = 55.6 grams
The sample is submerged in water and 27.3 mL of water is displaced.
We need to find the density of a sample of an small asteroid. It is equal to the mass of the object per unit volume.
1 mL = 1 cm³
So,
So, the density of the sample is .
Answer:
-1.5 N because 1.5 N would be upwards and -1.5 N would be downwards
Answer:
All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.
Explanation: