Answer:
The correct answer is 27.764 grams.
Explanation:
A standard scientific unit for determining the large quantities of very small entities like molecules, atoms, or other specific particles is termed as a mole. The molecular weight of lithium is 6.941 grams per mole. Thus, one mole of lithium has 6.941 grams.
If, 1 mole of Li has 6.941 grams, then 4 moles of Lithium will have,
= Molecular mass of lithium/1 mole * 4 mole
= 6.941 gram per mole/1 mole * 4 moles.
= 27.764 grams
Answer:
Mitochondria - energy production in plant and animal tissue
Explanation:
The mitochondria is the power house of a cell. it contains adenosine-tri- phosphate or ATP molecules that produce energy through active transport. The mitochondria is responsible for energy production in both plant and animal cells
Answer:
The answer to your question is 59.5 g
Explanation:
Chemical reaction
4Al + 3O₂ ⇒ 2Al₂O₃
Data
mass of Al₂O₃ = ?
mass of Al = 31.5 g
mass of O₂ = 31.5 g
Atomic mass Al = 4 x 27 = 108 g
Atomic mass O₂ = 6 x 16 = 96 g
Process
1.- Calculate the limiting reactant
Theoretical proportion Al/O₂ = 108/96 = 1.125
Experimental proportion Al/O₂ = 31.5/31.5 = 1
The limiting reactant is Al because the proportion diminished
2.- Calculate the mass of Al₂O₃
molecular mass Al₂O₃ = (27 x 2) + (16 x 3) = 2(102 g) = 204 g
108 g of Al ---------------------- 204 g of Al₂O₃
31.5 g of Al --------------------- x
x = (31.5 x 204)/108
x = 59.5 g of Al₂O₃