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3 years ago

For question #17, use the following picture:

Physics

1 answer:

Serhud [2]3 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

#learnwithBrainly

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6. And what's up with ChiN?

n200080 [17]

I don’t know what’s up with chin man ??

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2 years ago

At summer camp, the swimming course runs the length (L) of a small lake. To determine the length of the course, the camp counsel

sleet_krkn [62]

Answer:

47 m

Explanation:

Data obtained from the question include the following:

Length of dry leg 1 (L1) = 40 m

Length of dry leg 2 (L2) = 25 m

Length of swimming course (L) =..?

The length of the swimming course can be obtained by using pythagoras theory as shown below:

L² = L1² + L2²

L² = 40² + 25²

L² = 1600 + 625

L² = 2225

Take the square root of both side.

L = √2225

L = 47.1 ≈ 47 m

Therefore, the length of the swimming course is approximately 47 m.

7 0

3 years ago

How many joules of work are done against a truck when a force of 50 N pushes it 1 kilometer away

ELEN [110]

Answer:

Work = 50,000 J

Explanation:

Work = force * distance

Given that,

force = 50N
Distance = 1km = 1000m

Work = 50 * 1000

Work = 50,000 J

8 0

2 years ago

What percent of air by volume is nitrogen

nlexa [21]

Answer:

78 percent

Explanation:

I guess that's the right answer

5 0

3 years ago

An important dimensionless parameter in certain types of fluid flow problems is the Froude number defined as V/√g.l where V is a

prohojiy [21]

Answer:

1.24611

Explanation:

V = Velocity = 10 ft/s

L = Length = 2 ft

g = Acceleration due to gravity = 32.2 ft/s²

Froude number is given by

$Fr=\dfrac{V}{\sqrt{gL}}\\\Rightarrow Fr=\dfrac{10}{\sqrt{32.2\times 2}}\\\Rightarrow Fr=1.24611$

Converting to SI units

$10\ ft/s=10\times \dfrac{1}{3.281}$

$32.2\ ft/s^2=32.2\times \dfrac{1}{3.281}$

$2\ ft=2\times \dfrac{1}{3.281}$

$Fr=\dfrac{V}{\sqrt{gL}}\\\Rightarrow Fr=\dfrac{10\times \dfrac{1}{3.281}}{\sqrt{32.2\times \dfrac{1}{3.281}\times 2\times \dfrac{1}{3.281}}}\\\Rightarrow Fr=1.24611$

The Froude number is 1.24611

The Froude number is equal. The Froude number is dimensionless as the units cancel each other. In order for this to happen the units used need to be consitent either imperial or SI.

7 0

3 years ago