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Katen [24]
4 years ago
9

In a game of "Clue," Ms. White is killed in the conservatory. You have a device in each room to help you find the murderer— a sp

ectrometer that emits the entire visible spectrum to indicate who is in that room. For example, if someone wearing yellow is in a room, light at 580 nm is reflected. The suspects are Col. Mustard, Prof. Plum, Mr. Green, Ms. Peacock (blue), and Ms. Scarlet. At the time of the murder, the spectrometer in the dining room recorded a reflection at 520 nm, those in the lounge and study recorded reflections of lower frequencies, and the one in the library recorded a reflection of the shortest possible wavelength. Who killed Ms. White? Explain.
Chemistry
1 answer:
Arlecino [84]4 years ago
7 0

Answer: Ms. Scarlet is the murderer.

Explanation: Each color has a wavelength band, some visible to the human eye (visible spectrum), some for the other animals. In this game of "Clue", the color are yellow (Col. Mustard), violet (Prof. Plum), green (Mr. Green), blue (Ms. Peacock) and red (Ms. Scarlet). Using the device and knowing each band, it's determined that at the time of murder, Mr. Green was in the dining room, because green light has the wavelength between 495 to 570nm; Prof. Plum was in the library, due to violet's light has the shortest wavelength; Col. Mustard and Ms. Peacock were either in the lounge or in the study, because of their color's light wavelength measurement. So, the person responsible for the murderer was Ms. Scarlet, as the other devices in the other places didn't register a higher wavelength, which is compatible to the red light.

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Express the following numbers in scientific notation:
uranmaximum [27]

Answer :

(a) The number in scientific notation is, 6.0200\times 10^4L

(b) The number in scientific notation is, 4.520\times 10^3J

(c) The number in scientific notation is, 6.00\times 10^{-3}mg

(d) The number in scientific notation is, 1.023\times 10^{-2}km

(e) The number in scientific notation is, 8.070\times 10^1mL

Explanation :

Scientific notation : It is the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example :

5000 is written as 5.0\times 10^3

889.9 is written as 8.899\times 10^{-2}

In this examples, 5000 and 889.9 are written in the standard notation and 5.0\times 10^3  and 8.899\times 10^{-2}  are written in the scientific notation.

8.89\times 10^{-2}  this is written in the scientific notation and the standard notation of this number will be, 0.00889.

If the decimal is shifting to right side, the power of 10 is negative and if the decimal is shifting to left side, the power of 10 is positive.

(a) As we are given the 60200 L in standard notation.

Now converting this into scientific notation, we get:

\Rightarrow 60200L=6.0200\times 10^4L

As, the decimal point is shifting to left side, thus the power of 10 is positive.

Hence, the correct answer is, 6.0200\times 10^4L

(b) As we are given the 4520 J in standard notation.

Now converting this into scientific notation, we get:

\Rightarrow 4520J=4.520\times 10^3J

As, the decimal point is shifting to left side, thus the power of 10 is positive.

Hence, the correct answer is, 4.520\times 10^3J

(c) As we are given the 0.00600 mg in standard notation.

Now converting this into scientific notation, we get:

\Rightarrow 0.00600mg=6.00\times 10^{-3}mg

As, the decimal point is shifting to right side, thus the power of 10 is negative.

Hence, the correct answer is, 6.00\times 10^{-3}mg

(d) As we are given the 0.01023 km in standard notation.

Now converting this into scientific notation, we get:

\Rightarrow 0.01023km=1.023\times 10^{-2}km

As, the decimal point is shifting to right side, thus the power of 10 is negative.

Hence, the correct answer is, 1.023\times 10^{-2}km

(e) As we are given the 80.70 mL in standard notation.

Now converting this into scientific notation, we get:

\Rightarrow 80.70mL=8.070\times 10^1mL

As, the decimal point is shifting to left side, thus the power of 10 is positive.

Hence, the correct answer is, 8.070\times 10^1mL

5 0
3 years ago
Calculate the number of milliliters of 0.587 M NaOH required to precipitate all of the Ni2+ ions in 163 mL of 0.445 M NiBr2 solu
Brums [2.3K]

Answer:

We need 247 mL of NaOH

Explanation:

Step 1: Data given

Molarity of NaOH = 0.587 M

Volume of 0.445 M NiBr2 solution = 163 mL = 0.163 L

Step 2: The balanced equation

NiBr2(aq) + 2NaOH(aq) Ni(OH)2(s) + 2NaBr(aq)

Step 3: Calculate moles of NiBr2

Moles NiBR2 = Molarity NiBR2 * volume

Moles NiBR2 = 0.445 M * 0.163 L

Moles NiBR2 = 0.0725 moles

Step 3: Calculate moles of NaOH

For 1 mol NiBr2 consumed, we need 2 moles NaOH

For 0.0725 moles NiBR2, we need 2* 0.0725 = 0.145 moles NaOH

Step 4: Calculate volume of NaOH

Volume = moles NaOH / Molarity NaOH

Volume = 0.145 moles / 0.587 M

volume = 0.247L = 247 mL

We need 247 mL of NaOH

3 0
3 years ago
What is Alfunim second element ? Please help !!!
Vikentia [17]
Aluminum? It is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, non-magnetic and ductile metal in the boron group. By mass, aluminium is the most abundant metal in the Earth's crust and the third most abundant element
3 0
3 years ago
For the reaction, A(g) + B(g) => AB(g), the rate is 0.385 mol/L.s when the initial concentrations of both A and B are 2.00 mo
Tanya [424]

Answer : The rate for a reaction will be 0.14Ms^{-1}

Explanation :

The balanced equations will be:

A(g)+B(g)\rightarrow AB(g)

In this reaction, A and B are the reactants.

The rate law expression for the reaction is:

\text{Rate}=k[A]^2[B]^1

or,

\text{Rate}=k[A]^2[B]

Now, calculating the value of 'k' by using any expression.

\text{Rate}=k[A]^2[B]

0.385=k(2.00)^2(2.00)

k=0.0481M^{-2}s^{-1}

Now we have to calculate the initial rate for a reaction that starts with 1.48 M of reagent A and 1.32 M of reagents B.

\text{Rate}=k[A]^2[B]^0[C]^1

\text{Rate}=(0.0481)\times (1.48)^2(1.32)^1

\text{Rate}=0.14Ms^{-1}

Therefore, the rate for a reaction will be 0.14Ms^{-1}

7 0
4 years ago
From the list of the instructions and tips below, select the statement that would NOT lead to a successful recrystallization O D
Pachacha [2.7K]

Answer:

C. Precipitate the crystals as fast as possible

Explanation:

C. Precipitate the crystals as fast as possible

Precipitation if done fast , can lead to the formation of impure crystals , as impurities also get stuck inside the crystals. So it must be done slowly to obtain the pure crystals . Slower the crystals form , purer they are .

All the other options can lead to a successful recrystallization.  

5 0
4 years ago
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