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valentina_108 [34]
3 years ago
7

For questions 18-21, . In each space, classify the reaction type.

Physics
2 answers:
Sergeu [11.5K]3 years ago
4 0

Answer:

2LiBr+Pb(NO_3) = PbBr_2+ 2LiNO_3  is a double displacement reaction

  • Fe+2HCl  = FeCl_2+2H_2 is a redox reaction
  • CaO+H_2 O = Ca(OH)_ 2is a combination reaction
  • NiCl_2 = Ni+Cl_2  is a decomposition reaction

Explanation:

2LiBr+PbNO_3 = PbBr_2+2LiNO_3

                                                       It is of the form AX+BY = AY+BX

                                                       Fe+2HCl = FeCl_2+H_2

Both oxidation and reduction occur in this reaction. Fe gets oxidized and H gets reduced.

                                          Fe = Fe^(2+)+2e^-

                                          2H^++2e^- = H_2

                                          CaO+H_2 O = Ca(OH)_2

It is an exothermic combination reaction. Calcium reacts with water to produce calcium hydroxide and heat is released in this process.

  • NiCl_2 = Ni+Cl_2

It is a decomposition reaction where nickel chloride decomposes to nickel and chlorine.

igomit [66]3 years ago
4 0

Answer:

18. <u>Double Displacement Reaction</u>

19. <u>Single Displacement Reaction</u>

20. <u>Synthesis Reaction </u>

21. <u>Decomposition Reaction</u>

Explanation:

Double Displacement formula:

<em>AB + CD --> AD + CB</em>

Single Displacement formula:

<em>A + BC --> AC + B</em>

Synthesis formula:

<em>A + B --> AB</em>

Decomposition formula:

<em>AB --> A + B</em>

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In this case, the frequency of the source is doubled:

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X_C' = \frac{1}{2\pi f' C}=\frac{1}{2\pi (2f)C}=\frac{1}{2}X_C

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After running, your friend lies down on a tile floor because he says the "coolness" of the tile transfers to his body. Is this s
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3 years ago
A force of 25.0 N is applied 30° above the horizontal to a 5.0 kg box to move it across a smooth surface having coefficient of k
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Normal reaction=mg-F\sin 30

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A string with one 10-g washer on the end is attached to the rearview mirror of a car. when the car leaves an intersection, the s
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Answer:

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Given that,

mass = 10 g

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Put the value into the formula

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Using balance equation

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Put the value into the formula

a=\dfrac{0.098\times\sin6}{0.01}

a=1.02\ m/s^2

Hence, The acceleration of the car is 1.02 m/s².

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