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polet [3.4K]
3 years ago
15

Help its a test and I’m pretty bad at these

Chemistry
2 answers:
saw5 [17]3 years ago
8 0
B) just learn that you move the decimal right as numbers go higher and left if numbers decrease

So 1.75 km =1750000

Move decimal to the left to get a scientific notation

So 1.75 x 10^6

Brainliest?
wel3 years ago
5 0

Answer:

1.75 x 10^6 mm is the correct answer (B.)

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which of the following lewis diagrams best represents the bonding in the N2O molecule, considering formal charges? justify your
avanturin [10]

The best diagram to represent N2O is the second diagram.

The Lewis diagram is used to represent the way two or more atoms bond. This is possible by using lines to represent bonds and dots to represent electrons.

In the case of the molecule N2O bonding occurs in the following way:

  • A triple bond is formed between the nitrogen atoms, which means,  in the Lewis diagram the nitrogen atoms are connected with three lines.
  • The oxygen atom connects to one of the nitrogen atoms.
  • The nitrogen atom that is not connected to the oxygen will have 2 electrons represented by dots because the number of valence electrons is 5, but three were used in the triple bond.
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Learn more about Lewis diagram in: brainly.com/question/9436176

8 0
3 years ago
An alkaline earth hydroxide, M(OH)2, was taken to lab for analysis. The unknown powder was poured into a flask and swirled in ro
ExtremeBDS [4]

Answer:

1.77 * 10^-3

Explanation:

From the titration formula;

Let

CA = concentration of acid

CB = concentration of base

VA = volume of acid

VB = volume of base

NA = number of moles of acid

NB = number of moles of base

The equation of the reaction is;

M(OH)2(aq) + 2HCl(aq) -------> MCl2(aq) + 2H2O(l)

So;

CAVA/CBVB= NA/NB

CAVANB = CBVBNA

CB= CAVANB/VBNA

CB= 0.173 * 25.10 * 1/28.5 * 2

CB= 4.3423/57

CB= 0.0762 M

This implies that the solubility of M(OH)2 = 0.0762 M

M(OH)2(s) ----> M^+(aq) + 2OH^-(aq)

So

Ksp = x * (2x)^2

Ksp = 4x^3

x = 0.0762

Ksp= 4(0.0762)^3

Ksp = 1.77 * 10^-3

7 0
3 years ago
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