Answer:
<u>The pH at equivalence is 5.24 .</u>
Explanation:
Let us calculate -
millimoles of aniline = 160 x 0.3403 = 54.448
To reach equivalence , 54.448 millimoles HNO3 must be added,
V = 1086.79 mL HNO3 must be added
total volume = 1086.79 + 160 = 1246.79 mL
Concentration of [salt] = = 0.044 M
Now, at the equivalence or equivalent point ,
By solving the above equation , we get -
pH = 5.24
<u>Hence , the answer is 5.24 </u>
Density is equal to mass over volume.
D = m/v
m = 2.56 kg
V = 0.820 L
D = 2.56 / 0.820
D = <span>3.12195 kg/L which is the density of the liquid.
</span>
Answer:
n = 0.19 mol
Explanation:
Given mass = 15 g
The molar mass of AsH₃ = 77.94 g/mol
We need to find the number of moles in 15 g of AsH₃. We know that,
No. of moles = given mass/molar mass
So, there are 0.19 g/mol. Hence, the correct option is equal to 0.19 mol.
Decay is a type of degradation reaction and thus is considered a first order reaction. thus the formula goes like this.
rate constant= 0.693/half life
so here...
rate constant= 0.693/1620 year^-1
Answer:
Today's classification is called Linnaean system of classification. Is is important because it is according to the data of evolutionary studies and modern data.
Explanation:
It classifies plants, animals, algae fungi , and bacteria in a specific groups. It is important because this classification is somehow verified by the genetics and molecular biology.
7 levels of Linnaean classification system.
Kingdom
/Phylum
Class
Order
Family
Genus
Specie