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3 years ago

Which chemical equation represents a double replacement reaction?

Physics

1 answer:

liq [111]3 years ago

5 0

D. NaOH + HCI NaCl + H,0

Explanation:

The last option is a double displacement/replacement reaction.

This reaction is a neutralization reaction in which an acid combines with a base to produce salt and water only.

NaOH + HCl → NaCl + H₂O

A double displacement reaction is one that occurs between ionic compounds.
In this reaction, there is an actual exchange of reaction partners.

One of the following conditions serves as a driving force;

Formation of water or any other non-ionizing compound
Liberation of gases
Formation of a precipitate

learn more:

Precipitate formation brainly.com/question/8896163

#learnwithBrainly

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If a substance has a pH of 10 -11, it is considered a ...

Mrac [35]

Answer:

Base

Explanation:

anything with a pH between 0-6 is an acid. pH of 7 means neutral. 8-14 means it is a base

hope I helped :)

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4 years ago

A basketball was thrown and reached a velocity of 3 m/s in 0.5 seconds. What was the acceleration of the basketball?

Alborosie

Answer: acceleration is 6 m/s²

Explanation: V = vo + at. If initial speed Is zero,

V = at and a= V/t = 3m/s /0.5 s

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3 years ago

A spaceship ferrying workers to moon Base i takes a straight-line pat from the earth to the moon, a distance of 384,000km, Suppo

GrogVix [38]

Answer:

95.78125%

18000 m/s

22233.33 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

$v=u+at\\\Rightarrow v=0+20\times 15\times 60\\\Rightarrow v=18000\ m/s$

The velocity of the rocket at the end of the first 15 minutes is 18000 m/s which is the maximum speed of the rocket in the complete journey.

Distance traveled while speeding up

$s=ut+\dfrac{1}{2}at^2\\\Rightarrow s=0\times t+\dfrac{1}{2}\times 20\times 900^2\\\Rightarrow s=8100000\ m$

Distance traveled while slowing down

$s=18000\times 900+\dfrac{1}{2}\times -20\times 900^2\\\Rightarrow s=8100000\ m$

Distance traveled during constant speed

$384000000-(2\times 8100000)=367800000\ m$

Fraction

$\dfrac{367800000}{384000000}\times 100=95.78125\ \%$

Fraction of the total distance is traveled at constant speed is 95.78125%

Time taken at constant speed

$t=\dfrac{367800000}{18000}=20433.33\ s$

Total time taken is $900+20433.33+900=22233.33\ s$

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3 years ago

Which of the following motions has a straight line?

skad [1K]

The answer would probably be B.

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3 years ago

What is stomato and write its functions

Nataly_w [17]

Answer:

Stomata- In botany, a stoma (also stomate; plural stomata) is a tiny opening or pore that is used for gas exchange. They are mostly found on the under-surface of plant leaves. Its functions are- The gas exchange that occurs when stomata are open facilitates photosynthesis. Mark Brainliest Pls

Explanation:

8 0

4 years ago