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3 years ago

What does Reproducibility mean? Plz help me

2 answers:

6 0

Answer: the ability of an entire experiment or study to be reproduced, either by the researcher or by someone else working independently.

joja [24]3 years ago

4 0

Answer:

the ability to be reproduced or copied.

Explanation:

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FeCl3 + NaOH → Fe(OH)3 + NaCl

Sunny_sXe [5.5K]

Answer:

FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaCl

Explanation:

You are given a skeleton equation, or unbalanced equation.

FeCl₃ + NaOH → Fe(OH)₃ + NaCl

Count the number of atoms on each side. If there is 1 atom, the subscript is not written. If the subscript to the right of a bracket, it belongs to each element in the bracket.

Reactants → Products

Fe 1 Fe 1

Cl 3 Cl 1 Not balanced

Na 1 Na 1

O 1 O 3 Not balanced

H 1 H 3 Not balanced

The number of each element must be the same in the reactants and products. We can see that Cl (chlorine), O (oxygen) and H (hydrogen) have different numbers.

Write in coefficients in front of formulas (separated by + sign). Coefficients multiply each subscript (or "1" if not written) in the formula. Recount the atoms until you have equal reactant and product atom numbers.

I see that I need more chlorine in my products. Multiply the formula that has "Cl" by 3.

FeCl₃ + NaOH → Fe(OH)₃ + 3NaCl

Reactants → Products

Fe 1 Fe 1

Cl 3 Cl 3 Cl is balanced now.

Na 1 Na 3 Not balanced

O 1 O 3 Not balanced

H 1 H 3 Not balanced

Fix the "Na" now. Multiply the formula with "Na" on the left by 3.

FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaCl

Reactants → Products

Fe 1 Fe 1

Cl 3 Cl 3

Na 3 Na 3

O 3 O 3

H 3 H 3

Each side has the same number of each element. Therefore, this is balanced now.

Balanced formula:

FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaCl

7 0

4 years ago

What two terms are used to describe the temperature at which solids and liquids of the same substance exist at the same time?

goldenfox [79]

Answer:

The answer is melting and freezing point.

Explanation:

5 0

3 years ago

How do the major and minor scale divisions relate the precision of measurements taken with a metric ruler or graduated cylinder?

Nata [24]

Answer: Major scale and minor scale both relate the precision of measurements with more true value of measurement.

Explanation:

Major scale in a measuring device is maximum unit value on the scale that can be measured.

Minor scale in a measuring device is a least unit value on the scale that can be measured.

In a metric ruler major scale is 1 cm and minor scale is 0.1 mm which means one can measure accurate value up-to one decimal point and in 10 ml of graduated cylinder major scale division is 1 ml minor scale division is 0.01.

7 0

3 years ago

Predict the geometry around the central atom in SO2- A) trigonal pyramidal B) tetrahedral C) octahedral D) trigonal planar E) tr

liubo4ka [24]

Answer: The correct answer is Option D.

Explanation:

To calculate the hybridization of $SO_2$ , we use the equation:

$\text{Number of electron pair}=\frac{1}{2}[V+N-C+A]$

where,

V = number of valence electrons present in central atom (S) = 6

N = number of monovalent atoms bonded to central atom = 0

C = charge of cation = 0

A = charge of anion = 0

Putting values in above equation, we get:

$\text{Number of electron pair}=\frac{1}{2}[6]=3$

The number of electron pair around the central metal atom are 3. This means that the hybridization will be $sp^2$ and the electronic geometry of the molecule will be trigonal planar.

Hence, the correct answer is Option D.

3 0

4 years ago

For a given substance the amount of light absorbed depends upon what four factors

Alchen [17]

For a given substance, the amount of light absorbed depend on these four factors:
1. The wavelength of light.
2. The extinction coefficient of the absorbing material.
3. The path lenght of the medium through which the light is travelling and
4. The concentration of the substance.

3 0

3 years ago