Answer:
The correct answer is A. 3O₂ + 2Al → 2AlO₃
Law of conservation of mass states that mass can nether be created nor destroyed in a closed system or chemical reaction i.e. the total mass of the matter always remains the same throughout the chemical or physical change.
For example, in the given reaction 3O₂ + 2Al → 2AlO₃ the total mass of the reactants is equal to the total mass of the product.
Mass of oxygen = 16 x 3 = 48 AMU
Mass of aluminium = 2 x 27 = 54 AMU
Total molecular mass of the reactants = 102 AMU
Total molecular mass of the product = 2 x 27 + 6 x 8 = 102 AMU.
Hence, the total mass of the matter remains the same.
Answer:
15% of the world does not have access to clean fresh water.
Explanation:
D is false
humans are eukaryotic and we aren't small
Answer
The Impact that the Atmosphere has on the Earth’s cycle is it moves oxygen and carbon dioxide through the biosphere and transfers water into Earth’s oceans.
Explanations
The two main activities which affects the Earth’s cycle are the carbon cycle and water cycle. The increase in greenhouse gases in the Atmosphere has resulted into the greenhouse effect especially the amount of temperatures experienced on the surface of earth. An increased temperature has caused changes to the environment and ecologies.
