Answer:
pKa = 4.89.
Explanation:
We can solve this problem by using the <em>Henderson-Hasselbach equation</em>, which states:
pH = pKa + log
In this case [A⁻] is the concentration of sodium benzoate and [HA] is the concentration of benzoic acid.
We <u>input the given data</u>:
4.63 = pKa + log
And <u>solve for pKa</u>:
pKa = 4.89
Answer:
Density = 1.11 g/cm³, will not float on water
Explanation:
Assuming the other dimension missing is 4.0 cm
Then we can find the volume of the piece of wood.
Volume = Length × width × height
Volume = 6.0 cm × 3.0 cm × 4.0 cm
= 72 cm³
We are required to find the density of the wood.
Density = mass ÷ Volume
Mass of the wood = 80.0 grams
Therefore;
Density = 80.0 g ÷ 72 cm³
= 1.11 g/cm³
Hence, the density of the wood is 1.11 g/cm³
Water has a density of 1 g/cm³ and therefore the wood will not float since it is denser than water.
Answer: Animals found in the Arctic tundra include herbivorous mammals (lemmings, voles, caribou, arctic hares, and squirrels), carnivorous mammals (arctic foxes, wolves, and polar bears), fish (cod, flatfish, salmon, and trout), insects (mosquitoes, flies, moths, grasshoppers, and blackflies), and birds (ravens, snow buntings
The answer is degree of ionization. I'm guessing you have already taken the quiz.