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Lady_Fox [76]
3 years ago
12

Rewrite each percent as a fraction and decimal 56%

Chemistry
1 answer:
Tasya [4]3 years ago
6 0
I know the decimal is .56 i hope someone knows the fraction
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What is the molecular formula of a compound containing 42.17% Chlorine, 57.83% Oxygen, and has a molecular mass of 166 g/mol?
Juliette [100K]

Answer:

C2H4CL2

Explanation:

this is your answer

6 0
3 years ago
For the reaction C (s) + H2O (g) --> CO (g) + H2 (g) ΔH = 131.3 kJ/mol and ΔS = 133.6 J/K-mol at 298K. At temperatures greate
TiliK225 [7]

Answer:

The reaction is spontaneous when T> 0.98 Kelvin   OR T> -272.17°C

Explanation:

Step 1: Data given

ΔH = 131.3 kJ/mol = 131300 J/mol

ΔS = 133.6 J/K*mol

T = 298K

Step 2: The balanced equation

C (s) + H2O (g) --> CO (g) + H2 (g)

Step 3: ΔG

For a reaction to be spontaneous, ΔG should be <0

When ΔG > 0 the reaction is spontaneous in the reverse direction.

ΔG = ΔH - TΔS

Since ΔG<0

ΔH - TΔS <0

Step 4: Calculate T where the reaction is spontaneous

ΔH - TΔS <0

131300 J/mol - T*133.6 J/K*mol <0

- T*133.6 J/K*mol < -131300 J/mol

-T <-131300 /133.6

-T< -982.8 Kelvin

T> 982.8 Kelvin   OR T> 709.6°C

The reaction is spontaneous when T> 982.8 Kelvin   OR T> 709.6°C

At 298 K this reaction C (s) + H2O (g) --> CO (g) + H2 (g) is <u>not spontaneous</u>

6 0
3 years ago
Read 2 more answers
Number one and atom of element x contains 15 electrons and 16neutrons.
Sladkaya [172]

Answer:

a) 30.97

b) 3s² 3p²

I hope it's helps you

8 0
3 years ago
Read 2 more answers
A certain compound is made up of one phosphorus (p) atom, three fluorine (f) atoms, and one oxygen (o) atom. what is the chemica
Anna [14]

POF₃

<h3>Further explanation</h3>

A certain compound is made up of one phosphorus (P) atom, three fluorine (F) atoms, and one oxygen (O) atom.

<u>Question:</u>

What is the chemical formula of this compound?

<u>The process:</u>

The chemical formula of a compound states the type and the relative number of atoms contained in the substance.

  • Element symbols are written with capital letters, in this case, P, O, and F.
  • But if in other cases, these elements, for example, sodium or iron, the first letter is capital while the second letter is lowercase. Here is the writing: \boxed{ \ sodium = Na; \ iron = Fe \ }
  • We can add the number of atoms present as a subscript and it applies to three fluorines.

As follows, the chemical formula of this compound is \boxed{\boxed{ \ POF_3 \ }}

The names of these compounds are as follows:

  • Phosphoric trifluoride
  • Phosphoryl fluoride
  • Phosphorus oxyfluoride

<u>Notes:</u>

  • POF₃ is a colorless and similar gas to POCl₃ or POBr₃. Remember that F, Cl, Br are included in the halogen group.
  • The molecular shape of POF₃ is tetrahedral with a bond angle of 103°.
<h3>Learn more</h3>
  1. Determine the mass of aspirin from the number of molecules brainly.com/question/10567477#
  2. The chemical formula for nitrobenzene brainly.com/question/2861241
  3. Carbon atoms can form four covalent bonds brainly.com/question/3064597

Keywords: chemical compound, phosphorus, fluorine, oxygen, P, F, O, POF₃ molecular shape, tetrahedral, bond angle, halogens, colorless gas, element symbols, capital letter, lowercase, subscript

5 0
3 years ago
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Metallic and nonmetallic mineral resources are considered nonrenewable because Choose one:
Brrunno [24]
A natural processes make minerals much more slowly than we can mine them.
7 0
3 years ago
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