Answer:
Phosphorus, Sulfur, and Selenium are the only <u>poly</u>atomic elements.
Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, and Iodide are all <u>di</u>atomic elements.
Answer:
b. d. f. h
Explanation:
Anions are negatively charged. They are usually non metals with few exceptions. They need to gain electrons in order to form and they are always listed after cation in a compound.
If a 22. 5 mm copper (ii) solution(solution a) had an absorbance of 1. 65. Then, the absorbance if 8 ml of solution a was used to prepare a 20. 0 ml of a new copper (ii) solution is 918.84.
According to Beer-Lambert law, the absorbance (A) of a substance depends on its concentration (c)
A = ε . l. c
where,
ε: absorptivity of the species
l: optical path length
A 22.5 mM phosphate solution (solution A) had an absorbance of 1.012.
A = ε . l . c
1.65 = ε . l . 22.5 mM
ε . l = 37.125 mM⁻¹
We will calculate the concentration of the second solution using the dilution rule.
C₁ . V₁ = C₂ . V₂
22.5mM . 8 mL = C₂ . 20.0 mL
C₂ = 24.75 mM
The absorbance of the second solution is:
A = (ε . l ). c
A = (37.125 mM⁻¹) x 24.75 mM = 918.84
Thus, we find that the value of absorbance is 918.84.
Learn more about absorption:
brainly.com/question/23938376
#SPJ4
Answer:
Explanation:
The law of multiple proportions say that two elements, A and B, are able to combine with each other to form distinct compounds, the different masses of B that bind to a certain mass of A, are in relation of integers and simple numbers.
2SO₂ → S₂ + 2O₂
Mass S₂=2 . 32g= 64g
Mass 2O₂=4 . 16g=64g
∴ 64/64=1 ⇒ One produced 1.002 g S for every gram of O, the relation is 1:1
2SO₃ → S₂ + 3O₂
Mass S₂=2 . 32g= 64g
Mass 3O₂=6 . 16g=96g
∴ 64/96= 2/3 ⇒ It is produced 0.668 g S for every gram of O, the relation is 2:3.
To sum up, these results are consistent with the law of multiple proportions because the results are integers and simple numbers.
I hope I help you!
In my opinion yes, as of now, almost anyone could get there hands on lets say an explosive. Have you heard of dynamite fishing? It is illegal, but it is still done once people have access to dynamite, then what ends up happening not only do marine wildlife get killed but it pollutes the water and lessens the chance of the natural cycle of life. Also there are several other factors, firstly, what will you do with an explosive once you get your hands on it? Perhaps you could just use an explosive for fun/personal entertainment...that isn't right and it could harm people. So, to conclude the harder it is for people to access explosives or even acclerants the better...and to add this can be possible by making people get like some sort of licence to use them, and let them be trained in certain conditions so that there is no regrets once they have access to them. I know my idea sounds far fetched but its a thought!