Precipitation reaction and double displacement reaction
Answer:
it a
Explanation:
You have to decide the grams you have or the grams you get once converted to moles by the atomic mass of the electron you find on the periodic table to get your amount of atoms…
For example…
65.3 grams of oxygen, you look at your periodic table to find the mass and you see it’s rounded to 16. So, you divide the 65.3 by 16, to get your atoms.
65.3/16 =4 atoms.
Answer:
55.3 M
Explanation:
Given temperature = 25°C
Density = 0.997 g/mL
Based on density the mass of water per L = 997 grams
The molar mass of water = 18
The moles of water = ![\frac{mass}{molarmass}=\frac{997}{18}=55.3](https://tex.z-dn.net/?f=%5Cfrac%7Bmass%7D%7Bmolarmass%7D%3D%5Cfrac%7B997%7D%7B18%7D%3D55.3)
The molarity is defined as the moles of water per litre.
The moles = 55.3
Volume = 1 L
So molarity = 55.3 /1 = 55.3 M
It’s 18.015 g/mol but that isn’t one of the answers up there.
All atoms which contain 17 protons are called chlorine atoms. Adding or removing a proton from an atom's nucleus changes that atom's atomic number and creates a different element. Chlorine-35 and chlorine-37 are both isotopes of the element chlorine. The number after the name 'chlorine' is called the mass number