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irinina [24]
3 years ago
8

How do I convert 12 g into kg in a formula

Chemistry
1 answer:
tia_tia [17]3 years ago
6 0
Formula for converting g to kg : divide by 1000

12 / 1000 = 0.012
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Refrigerators are usually kept at about 5°C, while room temperature is about 20°C. if you were to take an empty sealed 2 liter s
MakcuM [25]

Answer:

c) No, because Celsius is not an absolute temperature scale

Explanation:

converting  5 oC to kelvin which is the absolute temperature scale gives = 273 + 5 = 278 K

and converting 20 oC to kelvin = 20 + 273 = 293 K

the ratio = 278 / 293 = 0.94 approx 1 not 4

8 0
3 years ago
Write a word equation for 2ZnS(s)+3O2(g) -> 2ZnS(s) + 2SO3(g)
hjlf

2ZnS(s)+3O2(g) -> 2Zns(s) + 2SO3(g)

the above given equation is unbalanced as it contains 4 moles of sulphur in the output but in the input there are only two aoms of sulphur so to balance the equation we will write the equation as given under

balanced equation is

2ZnS(s)+3O2(g) -> 2Zn(s) + 2SO3(g)


In words:

When 2 moles of solid zinc sulfide reacts with 3 moles of oxygen gas gives 2 moles of solid zinc  and 2 moles of sulphur trioxide gas.

3 0
2 years ago
In which of the following is light energy converted to electrical energy
AleksandrR [38]
The answer is c.solar cell
4 0
3 years ago
Read 2 more answers
For a hydrogen- like atom, classify these electron transitions by whether they result in the absorption or emission of light: n=
Nataly_w [17]

The electron transfer from n = 1 to n = 3 occurs the greatest energy change

<h3>Further explanation</h3>

In an atom, there are energy levels in the skin and sub skin.

This energy level is expressed in terms of electron configurations.

Writing the electron configuration starts from the lowest to the highest subshell's energy level. There are 4 sub-shells in an atom's shell, namely s, p, d, and f. The maximum number of electrons for each subshell is

  • s: 2 electrons
  • p: 6 electrons
  • d: 10 electrons and
  • f: 14 electrons

The filling of electrons uses the following sequence:

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.

Each sub-shell also has orbitals drawn in the form of a square box in which there are electrons symbolized by half arrows.

Each orbital in an atom consists of 4 quantum numbers, namely the main quantum number (n), the azimuth quantum number (l), and the magnetic quantum number (m) and the spin quantum number (s)

  • Value of n: positive integer
  • value of l: between 0 to n-1
  • m value: between -l to + l
  • value s: +1/2 or -1/2

Determination of electron configurations based on principles:

  • 1. Aufbau: Electrons occupy orbitals of the lowest energy level
  • 2 Hund: electron fills orbitals with the same energy level
  • 3. Pauli: there are no electrons that have 4 equal quantum numbers

Bohr's atomic model has shown the energy levels of electrons in the path of the atomic shell

The greater the value of n (the atomic shell, the main quantum number), the greater the energy level

In normal circumstances, electrons fill the skin at the lowest energy level starting from the skin K, L M and then N

When an atom gets energy from outside, the electrons will absorb energy so it moves to higher energy. This situation is called excited

Electrons will return to the original path or a lower energy level because the excited state is unstable. In this condition, the electron will release energy

The electron energy at the nth path can be formulated:

En = -Rh / n²

Rh = constant 2.179.10⁻¹⁸ J

So the electron transfer energy (delta E)

delta E = E end - E start

From the electron transfer available, because the value of the Rh constant is the same, the effect is the value of n (skin) ---> 1/n²

  • 1. n = 3 to n = 5

then the value of E is

delta E = -1/25 +1/9 = 0.07

  • 2. n = 1 to n = 3,

then the value of E is

delta E = -1/9 + 1/1 = 0.89

  • 3.n = 3 to n = 2,

then the value of E is

delta E = -1 / 9 + 1/16 = 0.14

  • 4. n = 2 to n = 1

then the value of E is

delta E = -1/4 + 1 = 0.75

These 4 values ​​indicate that regardless of the sign that there is an electron transfer from n = 1 to n = 3 the greatest energy change occurs

<h3>Learn more</h3>

 statement about electrons and atomic orbitals

brainly.com/question/1832385

Effective nuclear charge

brainly.com/question/5441986

statement about subatomic particles is true

brainly.com/question/3176193

Keywords: electron transfer, quantum number, electron shell

6 0
3 years ago
Read 2 more answers
50.0 g of oxygen are advalible for the combustion of 25g of carbon is this an adequate anount if so by bow much in excessbis the
VARVARA [1.3K]

Answer:

                     6.25 g of Carbon is in Excess

Explanation:

                     The balance chemical equation is as follow:

                                          C  +  O₂  →  CO₂

Step 1: Calculate Moles of O₂ as:

Moles = Mass / M/Mass

Moles = 50 g / 32 g/mol

Moles = 1.562 mol of O₂

Step 2: Calculate Moles of C as;

Moles  = 25 g / 12 g/mol

Moles  =  2.08 mol

Step 3: Calculate the Limiting reagent:

According to equation,

              1 moles of O₂ reacted with  =  1 mole of C

So,

            1.562 moles of O₂ will react with  =  X moles of C

Solving for X,

                     X = 1 mol × 1.562 mol / 1 mol

                      X = 1.562 mol of C

While we are provided with 2.08 mol of C. Means C is in excess.

Step 4: Calculate amount of Excess C as;

Excess Moles = Given Moles - Used Moles

Excess Moles = 2.08 mol - 1.562 mol

Excess Moles = 0.521 moles

Step 5: Converting Excess moles to Mass as:

Mass = Moles × M.Mass

Mass = 0.521 mol × 12 g/mol

Mass = 6.25 g

5 0
3 years ago
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