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krok68 [10]
3 years ago
14

How many lenses are found in the simplest telescopes? one two three four

Chemistry
1 answer:
sergejj [24]3 years ago
8 0
The answer is two lenses
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Calculate the oxidation number of “C” in CH3COCH3 please
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Answer:

The oxidation number of C (carbon) is +4

Explanation:

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4 years ago
What is the molarity of a solution of 0.2 moles of Potassium Oxide
egoroff_w [7]

The molarity of a solution : 0.4 M

<h3>Further explanation</h3>

Given

0.2 moles of Potassium Oxide

500 ml of water = 0.5 L

Required

The molarity

Solution

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution

\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}

Assume volume of solution = volume of water(addition of solution volume from volume Potassium Oxide is negligible

Input the value :

M = 0.2 : 0.5

M = 0.4

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4 years ago
Which two atoms would typically form a covalent bond?
MrMuchimi

Answer:

two atoms both non metals

Explanation:

because if the bond is formed between atoms with similar electronegativity since covalent bonding is the sharing of electrons

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65.3 \div 20

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