Which of the following is an accurate mathematical expression of dalton's law? assume the variable ‘p' stands for pressure.

a. ptotal = p1 + p2
b. ptotal = p1 x p2
c. ptotal = p1 ¸ p2
d. ptotal = p1 + p2 x p3

Dalton's law of partial pressures states that the total pressure of a mixture of gases is the sum of the partial pressures of its components:
\text {P}_{\text{Total}} = \text P_{\text {gas 1}} + \text P_{\text {gas 2}} + \text P_{\text {gas 3}} ...P
Total
=P
gas 1
+P
gas 2
+P
gas 3
...

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water