Hey there!
Atomic number is the number of protons.
Atomic mass is the sum of protons and neutrons.
9 + 11 = 20
Your answer is B) The atomic number is 9 & the atomic mass is 20.
Hope this helps!
density of acetone in gm/cm^3 is 0.791
=28.80cm^3*0.791 g/cm63
=22.78 g
Answer:
The more acidic the solution the faster it rusts. More Na = more rust
Explanation:
1) list givens and convert if necessary
C₁ = 3.50 mol/L
V₁ = 0.550 L
C₂ = ?
V₂ = 0.275 L
2) rearrange formula
3) solve
C₂ = 7.00 mol/L
Answer:
<em>a)C4H5N2O</em>
<em>b)C12H22O11</em>
<em>c)HO2</em>
<em>d)CH2O</em>
<em>e)C3H4O3</em>
Explan ation:
To obtain th e empirical formul a from the molecular for mula you have to divide the subscripts by the largest whole number you can, that provide you a whole number for each one subscripts:
