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valentinak56 [21]

3 years ago

15

The human eye cannot see anything less than 40 micrometers in size. What is this length in meters?

1 answer:

Agata [3.3K]3 years ago

6 0

Answer:

4e-5 is the length in meters

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For some jobs, “good enough” is good enough. That’s sometimes true in chemistry. More often, though, careful planning, calculati

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When carrying out experiment in the laboratory to investigate physical changes, absolute measurement is usually not needed. For instance, one can just take a little sample of sodium chloride and dissolve it in water to demonstrate physical change. But for other experiments, such as the measurement of the catalase enzyme activity in a liver tissue. Careful measurements have to be made when preparing the chemicals that will be used in the experiment.

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3 years ago

12) Which statement is not a component of the particle kinetic molecular theory of matter? A) Atoms of different elements are id

agasfer [191]

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c i got it right on usatestprep

Explanation:

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2 years ago

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Fynjy0 [20]

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3 years ago

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The following anions can be separated by precipitation as silver salts: Cl- , Br- , I- , CrO4 2-. If Ag is added to a solution c

dalvyx [7]

Answer:

AgI, AgBr, AgCl and Ag₂CrO₄

Explanation:

Ksp (product solubility constant) is defined as the equilibrium constant of the general reaction:

XₐYₙ(s) → aXⁿ⁺(aq) + nYᵃ⁻(aq)

<em>Where X is cation and Y is anion.</em>

Ksp = [aXⁿ⁺]ᵃ [nYᵃ⁻]ⁿ

The presence of XₐYₙ(s) produce ax moles of aXⁿ⁺ and nx moles of Yᵃ⁻. <em>Where X is the solubility of the compound.</em>

Replacing in Ksp:

Ksp = [ax]ᵃ [nx]ⁿ

Solving for x, Solubility (S) is defined as:

$S = \sqrt[n+a]{\frac{Ksp}{a^{a} n^n} }$

For AgCl, Ag₂CrO₄, AgBr and AgI solubilities are:

$S = \sqrt[2]{\frac{1.8x10^{-10}}{1} }$ = 1.34x10⁻⁵M

$S = \sqrt[3]{\frac{1.1x10^{-12}}{4} }$ = 6.50x10⁻⁵M

$S = \sqrt[2]{\frac{5.4x10^{-13}}{1} }$ = 7.35x10⁻⁷M

$S = \sqrt[2]{\frac{8.5^{-17}}{1} }$ = 9.22x10⁻⁹M

The lower solubility is the first compound in precipitate, thus, order of precipitation is:

<em>AgI, AgBr, AgCl and Ag₂CrO₄</em>

8 0

3 years ago

What is the correct chemical formula for ruthenium permanganate

Zigmanuir [339]

Here is your answer

Ru(MnO4)2

We know that

valency of Ru=2

Valency of permanganate(MnO4)= 1

So, on combining the two

Ru(MnO4)2 is obtained by transferring of electrons.

HOPE IT IS USEFUL

3 0

3 years ago