Answer:
Environment mainly consists of atmosphere, hydrosphere, lithosphere and biosphere. But it can be roughly divided into two types such as (a) Micro environment and (b) Macro environment. It can also be divided into two other types such as (c) Physical and (d) biotic environment.
Explanation:
Explanation: Nickel atoms<span> have 28 protons in their </span>atomic nuclei<span>, giving </span>nickel<span> the</span>atomic<span> number 28. In addition to 28 protons, a </span>nickel atomic nucleus<span> contains 30 to 36 neutrons, depending on the isotope. ... The </span>atomic nuclei<span> of </span>copper<span> also include 34 to 37 neutrons, depending on the isotope.</span>
Answer:
Iron gains three electrons.
The number of moles in 2.154 x 10⁻¹ kg of Al is 7.984.
<h3>What is a Mole?</h3>
- A mole is a unit used to describe the amount of substance that has exactly the same number of elementary particles as there are atoms in 12 grams of Carbon - 12.
- A mole has 6.022 x 10²³ elementary particles (atoms, ions or molecules, etc.). This fixed quantity is known as Avagadro's Number.
The molar mass of Al = 26.98 gmol⁻¹
Given the mass of Al = 2.154 x 10⁻¹ kg = 215.4 g
Number of moles given by
where m = given mass of the compound
M = Molar mass of the compound
The number of moles of Al = = 7.984 moles
Hence, the number of moles of Al is 7.984 moles.
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