Answer: 1.14
Explanation:
To find the molarity of the acid, we will utilize the equation derived from the neutralization process:
where
are the n-factor, molarity, and volume for the acid and
represent the n-factor, molarity, and volume for NaOH.
We know that:
By substituting the known values into the equation, we get:
To determine the pH of gastric juice:
The molarity amounts to = 0.072
Thus, the pH level of the gastric juice is 1.14
1. Saturated hydrocarbons can either be cyclic or acyclic structures. 2. An unsaturated hydrocarbon molecule contains at least one double bond. Explanation: Greetings, hydrocarbons are defined as the most basic organic compounds comprising only carbon and hydrogen. Therefore, we can eliminate the third statement since ethylenediamine is identified as an amine (an organic structure containing NH groups). Consequently, as saturated hydrocarbons only exhibit single bonds between carbons and carbon-hydrogens, they may be cyclic (ring-shaped) or acyclic (not ring-shaped), establishing the truth of the first statement. Finally, since saturated hydrocarbons exclusively feature single bonds while unsaturated hydrocarbons can exhibit double or triple bonds between carbons and carbon-hydrogens, the existence of at least one double bond categorizes the hydrocarbon as unsaturated. Hence, the first two statements are correct. Best regards.
Response:
H₂SO₄
Clarification:
Given a compound consisting of 0.475 g H, 7.557 g S, and 15.107 g O, we must compute the empirical formula by following specific steps.
Step 1: Compute the total mass of the compound
Total mass = mass H + mass S + mass O = 0.475 g + 7.557 g + 15.107 g
Total mass = 23.139 g
Step 2: Determine the percentage composition.
H: (0.475g/23.139g) × 100% = 2.05%
S: (7.557g/23.139g) × 100% = 32.66%
O: (15.107g/23.139g) × 100% = 65.29%
Step 3: Divide each percentage by the element's atomic mass
H: 2.05/1.01 = 2.03
S: 32.66/32.07 = 1.018
O: 65.29/16.00 = 4.081
Step 4: Normalize all values by the smallest one
H: 2.03/1.018 ≈ 2
S: 1.018/1.018 = 1
O: 4.081/1.018 ≈ 4
Thus, the empirical formula for the compound is H₂SO₄.
The temperature difference after 3 hours is 5.16 K. Given that the moles of O₂ inhaled rate at 0.02 mole/min, which converts to 1.2 mole/hour, we know the average heat released during metabolism is 7.2 kJ/h·kg. Therefore, the amount of heat generated within 3 hours will be 7.2 kJ/h·kg multiplied by 3 hours, giving a result of 21.6 kJ/kg, or 21.6 x 10³ J/kg. Applying the formula Qp = Cp x ΔT, and taking the body's heat capacity to be 4.18 J/g·K, we find ΔT = 5.16 K.
