The electron configuration describes the electrons of Magnesium
The correct choice is B.
Mixtures retain their properties because science has proven it. Take a bag of trail mix for example. Those raisins and marshmallows and m&m’s can each be separated. When you take them out, they keep their same texture.
Is not correct because mixtures can be solids (Trail mix is one example)
Correct
Is not correct because sometimes it cannot be seen (Lemonade powder and water is one example)
Is not correct because trail mix is an example.
Answer:
b
Explanation:
there is 1000m in 1 km so the ans is literally just 145x1000 m which is 145000m
20 g of contains ions of
<h3>What is Mole?</h3>
A mole is a unit to measure an amount of any substance which contains as many elementary particles as there in 12 g of Carbon 12.
A mole contains particles and this fixed number is called Avogadro’s number.
No. of moles is given by,
where m = Given mass in grams
M = Molar mass
Here,
No. of moles of = = 0.132 moles
No. of molecules of = 0.132 x 6.022 x = 7.94 x
No. of molecules of = no. of ions of = no of ions of
Thus, no. of ions in 20 g of is 7.94 x
Learn more about the mole concept:
brainly.com/question/20668126
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<span>[Ni(en)3]SO4
en does not have charge, so
Ni²⁺SO4²⁻,
</span>Ni²⁺