I believe its A. please correct me if im wrong! <3
Answer:
Explanation:
You need to know one piece of information for these problems. That is as follows:
There are 6.02 x 10^23 atoms in a mole of atoms or 6.02 x 10^23 molecules in a mole of molecules (actually there are 6.02 x 10^23 in a mole of anything).
So in 3.161 x 10^21 molecules of CO2 there are 3.161 molecules x (1 mole CO2/6.02 x 10^23 molecules CO2)= ?? moles CO2. Then multiply that by 2 to find the moles of O in CO2.
The others are done th same way.
Antimony Sb
Explanation:
The element that will have similar chemical properties with Arsenic As is element Antimony or Sb.
An element is a distinct substance that cannot be split-up into simpler substances. They are made up of only one kind of atom.
- The chemical properties of an element is determined mostly by the number of electrons in its outermost shell.
- This is called the valency of an element.
- Element having the same valency behaves the same way chemically.
- They exchange the same number of electrons during chemical reaction.
Therefore, elements in the same group on the periodic table have the same chemical properties.
Elements in the same group have the same valency.
Anitmony and Arsenic belongs to group 5 on the periodic table. The elements in this group are Phosphorus, Arsenic, Antimony and Bismuth.
learn more:
Chemical properties brainly.com/question/2376134
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