Answer: 62.173%
explanation:
equation for percentage mass of an element in a compound = (Mass of element in compound / mass of the whole compound ) × 100%
% mass = (46.63÷75.00) × 100
= 0.62173 × 100
= 62.173%
Sedimentary, igneous and metamorphic
Conductance decreased when increase in temperature of conductor
But conductance increase when increase in temperature of semiconductor...........
Answer:
84.24 g
Explanation:
Given data:
Mass of oxygen = 75 g
Mass of Al required to react = ?
Solution:
Chemical equation:
4Al + 3O₂ → 2Al₂O₃
Number of moles of oxygen:
Number of moles = mass/ molar mass
Number of moles = 75 g/ 32 g/mol
Number of moles = 2.34 mol
Now we will compare the moles of oxygen with Al.
O₂ : Al
3 : 4
2.34 : 4/3×2.34 = 3.12 mol
Mass of Al required:
Mass = number of moles × molar mass
Mass = 3.12 mol × 27 g/mol
Mass = 84.24 g
Answer:
the occur near the equator bc its- bc its warm and they get weak bc it slows them down
Explanation:
