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.
The answer to your question is B, Lunacy.
Answer:
The main difference between living and non-living things is that a living organism is or was once alive, whereas a non-living thing has never been alive. Non-living is not the same as being dead because non-living things were never alive and therefore cannot die.
Explanation:
Answer:
Option A, C and D
Explanation:
Mutations can be beneficial and call also not be beneficial. Examples of beneficial mutation includes laptop tolerance, HIV resistance etc. This mutations occur as changes in the nucleic acid sequences (DNA; which is made up of the four nitrogenous bases, deoxy/ribose sugar and phosphate group. Changes in these bases can bring about mutations that are beneficial) of organism and also it depends on where in the genetic code they occur. Beneficiary mutations can bring about increased fitness of the organisms involved.
Answer:
Explanation:
The global average atmospheric carbon dioxide in 2019 was 409.8 parts per million (ppm for short), with a range of uncertainty of plus or minus 0.1 ppm. Carbon dioxide levels today are higher than at any point in at least the past 800,000 years.
