Answer:
A) membrane, nucleus, cytoplasm
Explanation:
- A cell is the fundamental unit of life for living organisms that is made of organelles.
- Each organelle performs a specific function to enhance cell activities.
- Animal and plant cells share certain features and also differ in several ways.
- Animal cells and plant cells contain similar organelles such as cell membranes, mitochondria, nucleus, cytoplasm, and ribosomes among others.
- However, plant cells contain cell wall and chloroplast that are absent in animal cells while animal cells contain centrioles that are absent in plant cells.
What is the difference between natural and artificial radioactivity?
Natural radioactivity comes from elements in nature. Artificial radioactivity comes from elements created in nuclear reactors and accelerators.
Answer:
53.4%
Explanation:
N₂ + 3H₂ → 2NH₃
Given that:
26.3 g of H₂ react with N₂ to produce 79.0 g of NH₃
Then:
The number of moles of H₂ = 26.3g of H₂ * (1 mol of H₂/ 2.02g of H₂)
= 13.05 mol of H₂
The number of moles of NH₃ = 13.05 mol of H₂ * ( 2mol of NH₃/ 3 mol of H₂)
= 8.697 mol of NH₃
The mass of NH₃ = 8.697 mol of NH₃ *( 17.04g of NH₃/ 1 mol of NH₃) = 148.1 g of NH₃
The percent yield = actual yield/ theoretical yield * 100%
The percent yield = ( 79.0 g/ 148.1 g )* 100%
The percent yield ≅ 53.4 %
a chemical dye whose color is affected by acidic and basic solutions is an acid base indicator
Answer:
The law of constant composition says that the composition of a homogeneous mixture is always the same
Explanation:
The law of constant composition that is also known as Proust's Law says that when two substances react with each other, to form a compound they will always do in a constant weight ratio, that is, the ratio of the masses between two substances that form a compound, must be proportional.