The principal thing that one can read from a periodic table is the atomic number which is the number in the box that the element symbol appears and it means the number of protons in the nucleus of its atom and this number determines its chemical properties and is unique for each chemical element. The table is color coded to show the different types of elements ie "transition metals, alkali metals, noble gases" etc. and these different types are grouped together.
You determine the correct number of significant figure of a measurement in a graduated cylinder by looking at the smallest division on the graduated cylinder. If the division is divided up to the ones place, you can still read the half of that division or the .50 measurement. So, you can have until the tenths place in your measurement.
1kg=1000g
3.20kg=?
now;
3.20×1000÷1=3200g
then;
number of moles=mass÷molarmass
number of moles=3200÷(2×65.4)
number of moles=3200÷130.8
number of moles=24.46moles.
A balanced chemical reaction equation is one in which the number of atoms of each of the atoms are the same on both sides of the reaction equation.
<h3>Balanced reaction equation</h3>
A balanced reaction equation is a type of reaction equation in which the number of atoms of each reactant on both sides of the reaction equation are the same.
Let us now try to balance each reaction;
- 2H2 + O2 ----> 2H2O
- S8 + 12O2 -------> 8SO3
- 2HgO ----> 2Hg + O2
- Zn + 2HCl ------> ZnCl2 + H2
Hence a balanced chemical reaction equation is one in which the number of atoms of each of the atoms are the same on both sides of the reaction equation.
Learn more about balancing reaction equations: brainly.com/question/7358082