Answer:
Explanation:
A mole is defined as the number of molecules divided by 6.02×10^23
Mole = (2×10^19)/(6.02×10^23)
Mole = 3.32×10^-5 mole
Consequently, she feels very anxious because she has 345600 seconds to wait. Explanation: 60 seconds make up 1 minute, and 60 minutes constitute an hour. Each hour has 3600 seconds (60*60) and 24 hours make up a day. Hence, 3600 seconds multiplied by 24 hours results in 1 day equating to 86400 seconds—therefore, over four days, we have 86400 * 4 equating to 345600.
Answer:
The categorization of strong, weak, and non-electrolytes is detailed below, based on the examples presented in the question.
Explanation:
A strong electrolyte fully dissociates or nearly so in an aqueous environment; typically, strong acids, bases, and salts fall under this category. Examples of strong electrolytes include:
- Hydrochloric acid, HCl
- Calcium hydroxide, Ca(OH)2
- Potassium chloride, KCl
A weak electrolytepartially ionizes in solution; weak acids and bases are primary instances. Examples consist of:
- Methylamine, CH3NH2
- Hydrofluoric acid, HF
A non-electrolytedoes not dissociate in an aqueous medium. Examples of non-electrolytes are:
- Sucrose, C12H22O11
- Methanol, CH3OH
Answer:
The volume of calcium hydroxide solution utilized is 0.0235 mL.
Explanation:

Moles of KHP = 
In accordance with the reaction, 2 moles of KHP react with 1 mole of calcium hydroxide, thus 0.0330 moles of KHP will react with;
of calcium hydroxide
The molarity of calcium hydroxide solution = 0.703 M
Volume of calcium hydroxide solution = V



The volume of the calcium hydroxide solution utilized is 0.0235 mL.
Initially, we calculate the moles of gas using the ideal gas law:
PV = nRT
n = PV / RT
n = (1.4 * 226.4) / (0.082 *(27 + 273.15))
n = 12.88
Next, we apply the given percentages to estimate the moles of helium:
Moles of helium = 0.655 * 12.88
Moles of helium = 8.44
We then use the formula:
Mass = moles * molar mass
Mass of helium = 8.44 * 4
Mass of helium = 33.76 grams.