What is the percent composition of calcium (ca) in cao? a 56g/40g x 100% b 16g/56g x 100% c 40g/56g x 100% d 40g/100% x 56g

The percentage composition of calcium (Ca) in CaO is option C.

Element  Atomic mass/u  No. of atoms  Subtotal mass/u  

    Ca              40.08                     1                     40.08  

    O                16.00                      1                    16.00  

                                                              Total = 56.08

Therefore, we can conclude that the correct option is C.

Learn more: link

C 40 g/56 g × 100 %

Explanation:

Calculate the mass of each component and the total mass.

Element  Atomic mass/u  No. of atoms  Subtotal mass/u

     Ca              40.08                     1                     40.08

     O                16.00                      1                    16.00

                                                               Total = 56.08

The formula for mass percent is

% by mass = Mass of component/Total mass × 100 %

In this problem

% Ca = mass of Ca/mass of CaO × 100 %

% H = 40.08 g/56.08 g × 100 %

ok whats the question if not i cannot you i need question and need a thing to answer

i believe the answer is three water molecules