Final answer:
The hydrogen ion concentration in the stomach with a pH of 1.040 is calculated using the antilog of the negative pH value, resulting in a concentration of 0.0912 M.
Step-by-step explanation:
To determine the hydrogen ion concentration when the interior of the stomach has a pH of 1.040, we need to understand the relationship between pH and hydrogen ion concentration, which is based on the formula pH = -log[H+]. In this formula, [H+] represents the hydrogen ion concentration in moles per liter (M).
To find the hydrogen ion concentration, we perform the reverse calculation by taking the antilogarithm (inverse log) of the negative pH value. The pH value given is 1.040, so the calculation would be [H+] = 10-pH = 10-1.040. Using a calculator, this gives us [H+] = 9.1201 x 10-2 M, which is the hydrogen ion concentration to the ten-thousandths place.
Therefore, the hydrogen ion concentration in the stomach with a pH of 1.040 is 0.0912 M.