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makkiz [27]
3 years ago
10

Which concern is the LEAST important when using a compound light microscope to view a sample of paramecia? A) obtaining good res

olution B) obtaining sufficient contrast C) recognizing the subject when one sees it D) having sufficient magnification available..........................THE ANSWER IS D....stg
Chemistry
2 answers:
Iteru [2.4K]3 years ago
8 0

Answer:

D)

Explanation:

The compound light microscope is a microscope that has more than one lens and its light source. Because of the various lens presented, having a sufficient magnification is not a concern.

However, only magnification doesn't indicate that it will be possible to view a sample, it's necessary some contrast to separate all the species presented, a good resolution (so the sample will be the focus), and also recognizing the subject when one sees it.

shepuryov [24]3 years ago
4 0
D is your answer to your quistion :) 
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Answer:If each side of the equation has the same number of atoms of a given element, that element is balanced. If all elements are balanced, the equation is balanced. - online resource

Explanation: if not im sorry

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3 years ago
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Discuss the shapes of s- orbitals, p-orbitals and d-orbitals.
timurjin [86]

The azimuthal quantum number (l) determines its orbital angular momentum and describes the shape of the orbital.

s-orbitals (for example 1s, 2s) are spherically symmetric around the nucleus of the atom.

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3 0
3 years ago
"solid potassium iodide decomposes into iodine gas and solid potassium. Write a a balanced chemical equation for this reaction"
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KI (s)  ----\ \textgreater \     K(s)  + I_2 (g)

Now, balance the equation:

2KI (s)  ----\ \textgreater \     2K(s)  + I_2 (g)

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3 0
4 years ago
Why is water so important for life?Why cant other substance made of hydrogen and oxygen like hydrogen peroxide take its place?
Readme [11.4K]

Answer:

<u>Reasons water is important </u>

Imagine earth without water. The soil, with no water in it and nothing growing on it, would be lifeless, dead, collapsed into dust, sand, clay or rock.

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6 0
3 years ago
In a reaction vessel, 17.6 g of solid chromium(III) oxide, Cr2O3, was allowed to react with excess carbon tetrachloride in the f
notsponge [240]

Answer:

72.53% is the yield of CrCl3

Explanation:

Given

Reaction:

Cr2O3(s) + 3 CCl4(l) → 2 CrCl3(s) + 3 COCl2(aq)

CCl4 is in excess and 17.6g  Cr2O3 present

The reaction yields 26.6g of CrCl3

To Find:

% yields of the reaction

Also given

Molar mass of CrCl3 = 158.35g/mol

Molar mass of Cr2O3 = 152.00 g/mol

By the stoichiometry of the reaction

1 mole of Cr2O3 gives  2 moles of CrCl3

0r

1 x1 52 g of Cr2O3 gives 2x 158.35 g of CrCl3

= 1 52 g of Cr2O3 gives 316.70 g of CrCl3

    17.6 g of Cr2O3 gives  (17.6÷152) × 316.70 g CrCl3

= 36.67 g CrCl3

but actual yield is only 26.6g

so % yield is (26.6 ÷÷ 36.67) × 100

= 72.53% is the yield of CrCl3

8 0
3 years ago
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