Answer:
2.58
Explanation:
Each tablet has a mass of 470 mg. The mass of 2 tablets is 2 × 470 mg = 940 mg = 0.940 g
The molarity of acetylsalicylic acid (aa) is:
M = mass of aa / molar mass of aa × liters of solution
M = 0.940 g / 180.16 g/mol × 0.240 L
M = 0.0217 M
Acetylsalicylic acid is a weak acid, so we can find [H⁺] using the following expression.
[H⁺] = √(Ca × Ka)
where,
Ca: concentration of the acid
Ka: acid dissociation constant
[H⁺] = √(0.0217 × 3.24 × 10⁻⁴)
[H⁺] = 2.65 × 10⁻³ M
The pH is:
pH = -log [H⁺] = -log 2.65 × 10⁻³ = 2.58
Answer:
metallic bonding
because it ids good conductor of electricity
Answer:
Boyle's most famous discovery had to do with how the pressure and volume of gases relate, either this or he discovered the volume of a gas decreases with increasing pressure...
Explanation:
...
Answer:Strontium-90 and cesium-137 have half-lives of about 30 years (half the radioactivity will decay in 30 years). Plutonium-239 has a half-life of 24,000 years. High-level wastes are hazardous because they produce fatal radiation doses during short periods of direct exposure.
Explanation:
Your answer would be,
Formula: Molarity (M) = Number of moles of solute/Solutions volume Liters
0.009(50) = .45 gm dissolved in 50 ml H2o
= 0.20(50) = 10 gm
Hope that helps!!!
