Answer:
the answer is letter B,FALSE
The majority of the mass of the atom is located in the nucleus. Remember that the nucleus contains both protons and neutrons and therefore, most of the mass of the atom.
Answer:
C₃H₈
Solution:
Step 1: Calculating Moles for each Element:
C = Mass of CO₂ × (1 mol of CO₂÷ M.Mass of CO₂) × (1 mol of C ÷ 1 mol of CO₂)
C = 2.641 g × (1 mol of CO₂÷ 44.011 g.mol⁻¹) × (1 mol of C ÷ 1 mol of CO₂)
C = 0.0600 mol
H = Mass of H₂O × (1 mol of H₂O ÷ M.Mass of H₂O) × (2 mol of H ÷ 1 mol of H₂O)
H = 1.442 g × (1 mol of H₂O ÷ 18.106 g.mol⁻¹) × (2 mol of H ÷ 1 mol of H₂O)
H = 0.159 mol
Step 2: Calculate the Smallest whole number ratio as,
C H
0.0600 0.159
0.0600/0.0600 0.159/0.0600
1 2.654
Multiply ratio by 3,
3 7.96
Or,
3 ≈ 8
Result:
Empirical Formula of Propane is C₃H₈
Answer : The correct option is, (a) to increase surface area of a solute
Explanation :
A mortar and pestle is a type tool that is used in the chemical laboratory for grinding and mixing the substances.
In the mortar and pestle, the pestle is a heavy or small substance that is made from porcelain material that has the rounded end. The mortar is a bowl type that is also made from porcelain material.
In the chemical laboratory, the scientists use a mortar and pestle due to increase the surface area of a solute. That means by the girding of the solute, the surface area will increases.
Hence, the correct option is, (a) to increase surface area of a solute
