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storchak [24]
3 years ago
5

Quantum transitions that result in the characteristic sharp lines of the X-ray spectrum always involve

Chemistry
1 answer:
labwork [276]3 years ago
4 0

Answer: 5

Explanation: this is because the energy level of the emitted of absorbed photon increases as the number of electron shell decreases, thereby making the inner shell have higher energy than other shells

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How long would it take a car to travel a distance of 260 kilometers if it were traveling at 65 km/hour
Mariulka [41]

Answer:

4 answers

Explanation:

Do simple divison

7 0
2 years ago
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*explain your answer for brainliest
Over [174]

Answer:

3 mol Cl₂/2 mol AlCl₃ (three over two)

Step-by-step explanation:

Start with the balanced equation"

2Al + 3Cl₂⟶ 2AlCl₃

The steps in the calculation are

mass of AlCl₃ ⟶ moles of AlCl₃⟶ moles of Cl₂ ⟶ mass of Cl₂

The critical step is the <em>conversion of moles</em>.

You multiply the moles of AlCl₃ by a <em>conversion factor</em> to get moles of Al:

Moles of AlCl₃ × conversion factor = moles of Al.

The conversion factor is <em>the molar ratio</em>, and it uses the coefficients of the formulas in the balanced equation.

It is either (2 mol AlCl₃/3 mol Cl₂) or (3 mol Cl₂/2 mol AlCl₃).

You choose the one that has the desired units of the answer in the numerator.

We choose the second option, because it has the correct units.

For example,

\text{0.2 mol AlCl}_{3} \times \frac{3\textbf{ mol Cl}_{2} }{ 2\text{ mol AlCl}_{3} } = 0.3\textbf{ mol Cl}_{2})

Notice how the units "mol AlCl₃" cancel and the correct units appear in the answer.

If we had used the other conversion factor, we would have gotten the wrong units.

3 0
3 years ago
A frisbee is moving at 11 m/s and has 3.6j of energy. how much does it weigh?
Ber [7]

Answer:

0.06 kg

Explanation:

Given data:

Mass of frisbee = ?

Velocity of frisbee  = 11 m/s

Energy of frisbee = 3.6 j

Solution:

K.E = 1/2 mv²

Now we will put  the values in this formula.

3.6 J = 1/2 m(11m/s)²

3.6 j = 0.5 ×121m²/s² × m

3.6 j = 60.5 m²/s² × m

m = 3.6 j/60.5 m²/s²

m= 0.06 j.m⁻².s²

j = Kg.m².s⁻²

m= 0.06 Kg.m².s⁻² .m⁻².s²

m = 0.06 kg

7 0
3 years ago
Alex wants to find out if different amounts of water affect plant growth. She waters three bean plants with three different amou
rosijanka [135]
The answer is C. The height of the plants.
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2 years ago
Define a physical change
Arte-miy333 [17]

Answer: A physical change is a change that can be undone.

Explanation: An example of this is mixing red blocks, green blocks, and blue blocks. You can easily separate them.

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