(2) a beta particle (4) a gamma ray
Answer:
54.2 g of Ca(OH)₂
Explanation:
Let's determine the moles of solute, we should need
Molarity . volume (L) = moles
Let's convert 600 mL to L
600 mL/ 1000 = 0.6L
1.22 mol/L . 0.6L = 0.732 moles
Finally we must convert the moles to mass ( moles . molar mass)
0.732 mol . 74.08 g/mol = 54.2 g
Answer: 54.2 g Ca(OH)2
Explanation: Molarity is moles of solute / L solution
First convert mL to L
600 mL x 1L / 1000 mL = 0.6 L
Find moles of Ca(OH)2
n= M x L
= 1.22 M x 0.6 L
= 0.732 moles Ca(OH)2
Convert moles to mass using its molar mass of Ca( OH)2 = 74 g
0.732 moles Ca(OH)2 X 74 g Ca(OH)2 / 1 mole Ca(OH)2
= 54.2 g Ca(OH)2
Answer:
1.
Explanation:
Each period of the periodic table ends with a noblegas.
Noble gas constitutes the seven chemical elements that make up up the eighteenth of the periodictable. The elements comprising the noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
These noble gases are odorless, colorless, tasteless, and nonflammable gases. Traditionally, they have been labeled as Group 0 in the periodic table was the name given to them for decades after they were discovered. They were named so be they it was believed that they are not able to bond to other atoms.
This meant that there could not combine with the atoms of other elements to form chemicalcompounds. The electronic structures of these structures and the discovery that some of them are able to combine with other atoms to form compounds led them to have a more appropriate name for Group 18.
Therefore each period of the periodic table ends with a noblegas.
Read more about noblegas, here
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