Answer:
a) pH = 9.82 b) pH = 1.65
a) pOH = 7.8 b) pOH = 4.45
Explanation:
pOH + pH = 14 for all of these solutions.
Answer:
78 moles of the solute
Explanation:
From the question;
- Molarity of the solution is 6.50 M
- Volume of the solution is 12.0 L
We want to determine the number of moles needed
We need to know that;
Molarity = Number of moles ÷ Volume
Therefore;
Number of moles = Molarity × Volume
Hence;
Number of moles = 6.50 M × 12.0 L
= 78 moles
Thus, the moles of the solute needed is 78 moles
Answer:
Lactic acidosis occurs when there is greater than 1.60 g in 4445 mL of blood
Explanation:
A normal blood lactic acid level is 0.5-1 mmol/L.
Mild to moderately elevated level of blood lactic acid known as hyperlactatemia occur when the range is between 2-4 mmol/L without metabolic acidosis.
Lactic acidosis occurs with blood lactic acid levels of > 4 mmol/L
Molar mass Lactic acid, C₃H₆O₃ = 90 g/mol
Mass 4 mmol lactic acid = 0.004 mol * 90 g/mol = 0.36 g
Mass of lactic acid in 1 litre or 1000 mL of blood = 0.36 g
Mass of lactic acid in 4445 mL of blood = 0.36 g * (4445/1000)
<em>Mass of lactic acid in 4445 mL of blood = 1.60 g</em>
Option A: one.
In a number, to determine the number of significant figures following 3 rules are used:
(1) The digits which are non-zero are always significant.
(2) Any zeros between two digits which are non-zero are significant.
(3) In the decimal portion, trailing zeros are significant.
The number is 1 carbon atom, it has one non-zero digit.
Therefore, according to rules, there is only 1 significant figure (underlined): <u>1</u>.
