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.
dude, you asked brainly the whole worksheet?? Do it yourself sreerag!!
Answer:
Heredity | Khan Academy
Reading a pedigree · Determine whether the trait is dominant or recessive. If the trait is dominant, one of the parents must have the trait.
Adenine, Cytosine, Guanine, and Thymine.
speed = distance/ time
Sally's speed = 200m / 39 s = 5.13 ms^-1
