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4 years ago

For question #17, use the following picture:

Physics

1 answer:

Serhud [2]4 years ago

6 0

Explanation:

18. __Double displacement__ 2LiBr + Pb(NO₃)₂ → PbBr₂ + 2LiNO₃

In a double displacement reaction, there is an actual exchange of partners to form new compounds.

The driving condition for this kind of reaction are:

formation of an insoluble compound called precipitate
formation of water or any other non-ionizing compound
liberation of a gaseous product.

Learn more:

Precipitation reaction brainly.com/question/1870098

19. ___Single displacement___ Fe + 2HCl → FeCl₂ + H₂

In a single displacement reaction, one substance replaces another.

The replacement of a metallic ion in solution by a metal higher in the activity series than the metal in solution falls into this category.
The positions of the two elements in the activity series serves as the driving force.

Learn more:

Chemical reactions brainly.com/question/3953793

20. ___Synthesis___ CaO + H₂O → Ca(OH)₂

Synthesis is a combination reaction

This reaction involves the formation of a single product from two or more reactants.
A compound forms from the union of two or more reactants
The large and negative heat of formation of the product is the driving force for this reaction.

Learn more:

Synthesis brainly.com/question/2761166

21. ______Decomposition__ NiCl₂ → Ni + Cl₂

In a decomposition or cracking reaction, two or more product forms from a single reactant.

The breakdown of a compound into its component individual elements or other compounds fall into this category.

The driving force for this reaction is the high heat of formation of the compound and the extreme instability of the compound.
A stable compound can also be decomposed on heating and applying pressure.

Learn more:

Thermal decomposition brainly.com/question/11181911

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3 years ago

A team of scientists are studying three species of frogs. How would the scientists use comparative anatomy and molecular biology

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They would identify the frogs by looking at their DNA and the genetic material

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3 years ago

Which word describes a statement that has been accepted, tested, and supported by multiple sets of evidence? A. Hypothesis B. Th

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Answer:B)THEORY

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3 years ago

1. Determine the energy released per kilogram of fuel used.

Serga [27]

The formula for energy release per kilogram of fuel burned is energy release per kg=6.702*10-13. and 19. J 1 Mev = 1.602 X 10 T

Calculate the energy in joules per kilogram of reactants given MeV per reaction. Energy is the ability or capacity to perform tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
Think of a mole of plutonium-239 (molar mass: 239 grams) as a mole of "reactions."

Energy used in the US per person annually = 3-5 X 1011
Population (number of people) = 3.108The required mass of the fuel is 3.5x1011 x3-1x10 8x 10)/6.703 X1013 kg. the mass required: 1.62 x 1033 kg Mev in Joules 6 is equal to 101.60*I0-
19. J 1 Mev = 1.602 X 10 T, which translates to 1.602*1013/2.39x10-3 energy release per kilogram, or 6.702*10-13.

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2 years ago

A stunt-rider on a motorcycle rides down a ramp and into a vertical loop-the-loop. If the diameter of the loop is 7.50 m, then t

VikaD [51]

Answer:

v = 6.06 m/s

Explanation:

In order for the rider to pass the top of the loop without falling, his weight must be equal to the centripetal force:

$Centripetal Force = Weight \\\frac{mv^2}{r} = mg\\\\\frac{v^2}{r} = g\\\\v = \sqrt{gr}$

where,

v = minimum speed of motorcycle at top of the loop = ?

g = acceleration due to gravity = 9.8 m/s²

r = radius of the loop = diameter/2 = 7.5 m/2 = 3.75 m

Therefore, using these values in equation, we get:

$v = \sqrt{(9.8\ m/s^2)(3.75\ m)}$

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3 years ago