E. HCI
Source:
The Internet
Just an example.. This can affect people because it can cause people to bring umbrellas wear rain coats of it were to rain.
Answer:
Part A. 10 atm
Part B. C₆H₆
Explanation:
<em>Part A. At present, automobile batteries are sealed. When lead storage batteries discharge, they produce hydrogen. Suppose the void volume in the battery is 100 mL at 1 atm of pressure and 25°C. What would be the pressure increase if 8 × 10⁻² g H₂ were produced by the discharge of the battery?</em>
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We can find the pressure for this amount of Hydrogen using the ideal gas equation.

<em>Part B. A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100°C and 760 mmHg. If the empirical formula of this compound is CH, what is the molecular formula of this compound?</em>
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First, we have to look for the molar mass of the compound through the following expression:

Now, we need the relation between the molar mass of the molecular formula and the molar mass of the empirical formula.

Finnally, we multiply the empirical formula by this coefficient to get the molecular formula.
(CH) × 6 = C₆H₆
Answer:

Explanation:
In multiplication and division problems, your answer can have no more significant figures than the number with the fewest significant figures.
(by my calculator)
There are three significant figures in 7.06 and two in 2.3.
You must round to
significant figures and report the answer as 1.3 × 1.0⁷.
The number that never changes is the atomic mass (atomic number on the periodic table)