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2 years ago

Explain, in your own words, why different elements produce different colors of light when heated.

2 answers:

8 0

As the electrons return o lower energy levels they gain energy in the form of light so this means that the colour of the light depends on the difference between two levels

fgiga [73]2 years ago

7 0

Different elements produce different colors of light when heated because the electrons in these elements have different permissible energy levels. When an element is heated, the electrons inside it become excited and move to an higher energy level from the ground state. When the electrons drop from this higher energy level, they typically emit energy quantum, the color of the light that is observed at this stage depends on difference that exist in the two energy levels.<span />

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Which observation could you make based on stimuli to your photoreceptors?(1 point)

Montano1993 [528]

Answer:

last one which is d

Explanation:

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3 years ago

Question 9 (2 points)

KonstantinChe [14]

Answer:

0.39 moles

Explanation:

To find how many moles are in 50.0 g of CaC₂O₄ you divide the grams of the sample by the molar mass of the compound;

$\frac{50.0 g}{128.097 g/mol}$ =0.39 mol

The grams cancel out and you are left with moles!

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2 years ago

Read 2 more answers

Do the following problem using significant figures.<br> 4.5 cm x 2000.0 cm x 4 cm =<br> I<br> cm^3

Anon25 [30]

Given :

Measurements $4.5\ cm\times 2000.0\ cm\times 4\ cm$ .

To Find :

The multiplication using significant figures .

Solution :

We know , the least number of significant figures in any number of the problem determines the number of significant figures in the answer.

So , significant figure( S.F) in 4.5 cm is 2 .

S.F in 2000.0 cm is 5 .

S.F in 4 cm is 1 .

So , minimum S.F is 1 .

Therefore , S.F of their product is 1 .

Now , multiplying them we will get :

$M=4.5\times 2000.0\times 4 \ cm^3\\\\M=36000\ cm^3$

Now , converting 36000 in 1 significant digit .

First we will write it in exponential 2 S.F form.

$3.6\times 10^4 \ cm^3$

Now , to convert 3.6 into 1 S.F we should round off this .

So , round off 3.6 we will get 4 .

Therefore , The multiplication using significant figures is $4\times 10^4\ cm^3$ .

Hence , this is the required solution .

3 0

2 years ago

Suggest an experimental method for measuring the change in concentration with time for each of the following reactions:(b) 2NO(g

USPshnik [31]

The experimental method for measuring the change in concentration with time for the given reaction is by measuring the amount of gas a reaction releases over time.

2NO(g) + Cl₂(g) → 2NOCl(g)

<h3>What is reaction rate?</h3>

The reaction rate is the rate at which a chemical reaction proceeds.
Which is proportional to both the increase in a product's concentration per unit time and the decrease in a reactant's concentration per unit time.
There is a wide range in reaction times.
The general definition is that the term "rate of a reaction" refers to the pace at which a reaction occurs.
As an illustration, iron rusting has a low reaction rate since the process is slow but wood burning has a high reaction rate because the process is quick.

Learn more about reaction rate here:

brainly.com/question/13440548

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7 0

1 year ago

Identify the combustion reaction

Paladinen [302]

Answer:

The combustion reaction is the last one, with the C4H12 compound.

Remember that all the combustion reactions has the oxygen as a substract and for products, you'll have CO2 and water.

Explanation:

3 0

3 years ago