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Ronch [10]
2 years ago
15

I WILL GIVE 15 POINTS PLS I NEED THIS BEFORE THE CLASS FINISHES IN 30 MINN

Chemistry
1 answer:
bulgar [2K]2 years ago
7 0

Answer:

likely be the same

Explanation:

this is because we have one color that both atoms share (green). both sample 1 and sample 2 have green and another color. yet, since they share one color, they are likely similar

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While conducting a lab experiment, Ali calculated that 1.20 E6 Joules of heat were needed to melt 18.5 kilograms of an unknown s
nordsb [41]

Answer:

Latent heat of fusion of the substance is 6.49\times 10^{4}J/kg

Explanation:

Latent heat of fusion denotes amount of energy (heat) per unit mass required to melt a solid material at constant temperature and pressure i.e. at it's melting point

Here amount of heat required = 1.20\times 10^{6}J

Mass of unknown substance being melted = 18.5 kg

So, latent heat of fusion of the substance = (required heat energy to melt)/(mass of the unknown substance) = \frac{1.20\times 10^{6}}{18.5}J/kg=6.49\times 10^{4}J/kg

So, latent heat of fusion of the substance is 6.49\times 10^{4}J/kg

7 0
3 years ago
A 50.0 mL sample of 0.00200 M AgNO3 is added to 50.0 mL of 0.0100 M NaIO3. What is the equilibrium concentration of Ag in soluti
Nana76 [90]

The equilibrium concentration of Ag⁺ in the solution is : 7.5 * 10⁻⁶ M

<u>Given that :</u>

Ksp for AgIO₃ = 3 * 10⁻⁸

<h3>Determine the equilibrium concentration of Ag in the solution </h3>

<u>First step</u> : Calculate the concentration of Ag⁺ and IO⁻₃ in the solution

[ Ag⁺ ] = ( mmol Ag⁺ / mL solution )

          = ( 50 * 0.00200 / 100 mL ) = 0.001 M

[ IO⁻₃ ] = ( mmol IO⁻₃ / mL solution )

           = ( 50 * 0.0100 / 100 mL )  = 0.005 M

<u>Next </u>determine the Ionic product ( Q )

Q = [ Ag⁺ ] [ IO⁻₃ ]

   = 0.001 * 0.005

   = 5 * 10⁻⁶  

Since the value of Q is > Ksp a precipitate ( IO⁻₃ )  will be formed after the completion of the precipitation reaction

Therefore the concentration of the excess  IO⁻₃  = 0.400 mmol / 100 mL

                                                                                 = 0.004 M

<u>Second step</u> : considering the initial and final concentrations

Initial concentrations ( mol/ L )                  Final concentrations ( mol/L )

[ Ag⁺ ] = 0 M                                                  [ Ag⁺ ]  = x

[ IO⁻₃ ] = 0.004 M                                          [ IO⁻₃ ] = 0.004 + x

<u>Final step </u>: Determine the equilibrium concentration of Ag in the solution

Ksp = 3 * 10⁻⁸ = [ Ag⁺ ]  [ IO⁻₃ ]

                      =  ( x ) ( 0.004 + x )

Therefore x = 7.5 * 10⁻⁶ ( Equilibrium concentration of Ag in the solution )

Hence we can conclude that The equilibrium concentration of Ag⁺ in the solution is : 7.5 * 10⁻⁶ M

Learn more about equilibrium concentration : brainly.com/question/13414142

6 0
2 years ago
Whitch of the following is a statement of mechanical weathering
guapka [62]
Is there multiple choice?
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3 years ago
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How does nuclear fission usually start
anzhelika [568]
Fission is the splitting of an atom. In a nuclear reaction
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A strip of litmus paper is put into a solution and turns blue. Which statement about the solution is true ?
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Red litmus turns blue in alkaline conditions. Alkaline can also be considered as basic. So the if the strip of litmus is red then the answer will be C.  
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3 years ago
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