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:
The answer to your question is 3 ml
Explanation:
Data
Dosage = 9.0 mg/ kg
Child's weight = 42.9 pounds
Suspension = 60 mg/ml
milliliters = ?
Process
1.- Convert the weight to kg
1 pound ------------------- 0.453 kg
42.9 pounds --------------- x
x = (42.9 x 0.453) / 1
x = 19.43 kg
2.- Calculate the milligrams the child needs
1 kg of weight ------------ 9 mg
19.43 kg ---------------------- x
x = (19.43 x 9) / 1
x = 174.87 mg of oxcarbazepine
3.- Calculate the milliliters needed
60 mg of suspension ------------- 1 milliliters
174.87 mg -------------- x
x = (174.87 x 1) / 60
x = 2.9 ml ≈ 3 ml
Answer:
1 not
2 not
3 not
4 balanced
5 not
6 not
7 balanced
Explanation:
the amount of elements must be equal in the reactant and products
Sodium is a member of the alkali metal family with potassium (K) and Lithium (LI) sodium's big claim to fame is that it's one or two elements in your table salt. when bonded to chlorine (CI) THE two elements make sodium chloride
