Answer:
C. 100.7 amu
Explanation:
Isotopes of an element are atoms of an element with the same atomic number but different atomic masses. Each atomic mass of an isotope is known as an isotopic mass. An element that exhibits isotope, that is, that have two or more isotopes has a relative atomic mass that is not a whole number.
Relative atomic mass of X is the sum of the products of the relative abundances of each isotope and its isotopic mass.
For Isotope ¹⁰⁰X: 30% × 100 = 30 amu
For Isotope ¹⁰¹X: 70% × 101 = 70.7 amu
Relative atomic mass of X = (30 + 70.7) amu = 100.7 amu
Therefore, the approximate atomic mass of X is 100.7 amu
Each substance in the mixture<span> keeps its own properties and can be </span><span>easily separated from the </span>mixture.<span> In a mixture of hydrogen and oxygen, molecules of both the gases will exist independently.</span>
The compound<span> on the other hand has properties different from the </span>elements it contains. In water as a compound of hydrogen and oxygen <span>what you will have is molecules of H20.</span>
Answer:
2H₂(g) + O₂(g) → 2H₂O(g), in presence of Pt as a catalyst.
Explanation:
The reaction:
<em>2H₂(g) + O₂(g) → 2H₂O(g), in presence of Pt as a catalyst.</em>
2.0 moles of hydrogen gas react with 1.0 mole of oxygen gas to produce 2.0 moles of water vapor in presence of Pt as a catalyst.
germanium has 32 protons in its nucleus
Answer:
Option (D)
Explanation:
Chlorofluorocarbon is referred to as one of the important greenhouse gas, that is responsible for the depletion of the ozone layer. It was earlier extensively used in the refrigerators, but are later observed that as the CFC molecules are disintegrated in the atmosphere, it gives rise to the elimination of chlorine atoms that destroy the ozone layer, allowing the ultraviolet radiations to enter the earth's atmosphere. So, the use of CFCs has been banned globally by international treaties.
This gas is long-lasting, and remains in the atmosphere for about 20 to 100 years, is not that effective to human bodies, and present in the stratosphere in a very small amount.
Thus, the correct answer is option (D).
