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dangina [55]
3 years ago
9

Pls help me I have 5 mins Science is a unique field of thought because it relies on _______ to describe the world

Chemistry
1 answer:
Pani-rosa [81]3 years ago
5 0
Most reasonable answer:
Observations and experimentation
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What is the molecular formula of a compound if its emprical formula is NO2 and its molar mass is 138.02 g/mole
Ratling [72]

Answer:

N₃O₆  

Step-by-step explanation:

Data:

EF = NO₂

MM = 138.02 g/mol

Calculations:

EF Mass = (14.01 + 32.00) u

EF Mass = 46.01 u

The molecular formula is an integral multiple of the empirical formula.

MF = (EF)ₙ

  n = MF Mass/EF Mass  

  n = 138.02 u/46.01 u  

  n = 3.000 ≈3

MF = (NO₂)₃

MF = N₃O₆

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3 years ago
Which one of these samples contains the smallest number of molecule?
erma4kov [3.2K]

Answer:

E) 1.0L of He at STP

Explanation:

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4 years ago
The atomic mass of an imaginary element X is 30.7377 amu. Element X has three isotopes. One isotope has an isotopic mass of 30.5
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Answer:

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Explanation:

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3 years ago
Three compounds that contain elements from Group 16 are SeO2F2 , SeOF2,
egoroff_w [7]

Answer:

A

Explanation:

A formal charge (FC) is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity(Wikipedia).

The formal charge on an atom in a molecule reflects the electron count associated with the atom compared to the isolated neutral atom(University of Calgary).

Looking at all the structures listed A-E for SeO2F2, only structure A minimizes the formal charges for each atom in SeO2F2.

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3 years ago
Zirconium has an atomic number of 40, And an atomic mass of 91. How many electrons does zirconium have?
Vedmedyk [2.9K]
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Explanation: Whatever the atomic number is, that’s also the number of electrons and protons.
3 0
3 years ago
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