c is the answer i odnt know the rest im only a sophmore
The atomic mass of a certain element is summation of the product of the decimal equivalent of the percentage abundance and the given atomic mass of each of the isotope. If we let x be the percentage abundance of the 86 amu-isotope then, the second one is 1-x such that,
x(86) + (1 - x)(90) = 87.08
The value of x from the equation is 0.73. This value is already greater than 0.5. Thus, the isotope with greatest abundance is that which is 86 amu.
Answer:
5 moles of Fe₂(SO₄)₃ will be produced
Explanation:
Given data:
Number of moles of Fe₂(SO₄)₃ = ?
Number of moles of Fe react = 10 mol
Solution:
Chemical equation:
3H₂SO₄ + 2Fe → Fe₂(SO₄)₃ + 3H₂
Now we will compare the moles of iron and Fe₂(SO₄)₃ .
Fe : Fe₂(SO₄)₃
2 : 1
10 : 1/2×10 = 5 mol
5 moles of Fe₂(SO₄)₃ will be produced.
Answer:
A physical change is a change that does not change the chemical properties of the substance and is purely physical.
Explanation:
The appearance of the object of chemical may change but its chemical properties are the same.
For example:
- Ice melting
- Water boiling
- Dissolving salt in water
- Cutting paper