Answer: Option (4) is the correct answer.
Explanation:
It is known that density is mass divided by volume.
Mathematically, Density = 
Since, density is directly proportional to mass. So, more is the mass of an element more will be its density.
Mass of magnesium is 24.305 g/mol.
Mass of barium is 137.327 g/mol.
Mass of beryllium is 9.012 g/mol
Mass of radium is 226 g/mol.
Hence, radium has more mass therefore it will have the greatest density at STP.
Answer:
succession
Explanation:
I am taking the test right now. Hope it is right. good luck
This is true. Both protons and neutrons are found within the nucleus. The electrons however are found orbiting the nucleus.
Hope this helped!
Using simply rational here:
1 Water= two hydrogen atoms+ 1 oxygen atom
The numbers provided would create seven water molecules based on having fourteen hydrogen’s (which would be seven times the two required for water) and seven oxygen.
So, 7
Answer:
95.3 grams.
Explanation:
Relative atomic mass data from a modern periodic table:
How many moles of Na are consumed?
.
.
How many moles of
formula units will be produced?
Consider the ratio between the coefficient of
and that of
in the equation:
.
As a result,
.
What will be the mass of that many
?
Formula mass of
:
.
.