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3 years ago

Which of these best matches a planet in the solar system with its characteristic?

Chemistry

2 answers:

Lera25 [3.4K]3 years ago

6 0

Uranus. Its axis is tilted to almost 90 degrees.

n200080 [17]3 years ago

3 0

Answer:

Uranus → rotates almost completely on its side

Explanation:

There are 8 planets in the solar system. Each has unique characteristics.

Jupiter is the largest planet of the solar system. It has a giant red spot which is a huge storm in its atmosphere that is visible from Earth.

Saturn is famous for beautiful visible ring system.

Mars appears red dot wandering in the sky. It appears red because its surface contains red iron oxide.

Venus is the hottest planet because it has thick atmosphere which traps the sunlight.

Neptune and Uranus are blue in color because of the presence of methane in their atmosphere.

Uranus rotates on its side because its axis is tilted to about 98 degrees.

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A total of 20.0 mL of sodium hydroxide (NaOH) was neutralized by 30.0 mL of 0.250 M hydrogen bromide (HBr). What was the concent

Karolina [17]

Answer:

0.375 M

Explanation:

NaOH(aq) + HBr(aq) ------------> NaBr(aq) + H2O(l)

Concetration of acid CA= 0.250M

Concentration of base CB= ????

Volume of acid VA= 30.0mL

Volume of base VB= 20.0mL

Number of moles of acid nA= 1

Number of moles of base nB= 1

CA VA/CB VB= nA/nB

CB= CAVAnB/VB nA

= 0.25× 30×1/20×1= 0.375 M

8 0

3 years ago

For a particular chemical reaction, the enthalpy of the reactants is -400 kJ. The enthalpy of the products is -390 kJ. The entro

Hunter-Best [27]

Answer:

For a particular chemical reaction, the enthalpy of the reactants is -400 kJ. The enthalpy of the products is -390 kJ. The entropy of the reactants is 0.2 kJ/K. The entropy of the products is 0.3 kJ/K. The temperature of the reaction is 25oC. What can you conclude about this reaction?

It is exergonic

It is endergonic

it is a redox reaction

It is being catalyzed by an enzyme

6 0

2 years ago

Which is the correct formula for phosphorus pentachloride? PCl4 because a subscript of 4 indicates four Cl atoms PCl5 because a

Arlecino [84]

Answer: The correct formula for phosphorous pentachloride is $PCl_5$ because a subscript 5 indicates five chlorine (Cl) atoms.

Explanation: For the given molecule, phosphorous pentachloride, there are 2 atoms present which are phosphorous and chlorine atoms.

Number of phosphorous atoms = 1

Number of chlorine atoms = 5

So, the correct formula for phosphorous pentachloride will be $PCl_5$ because the subscript 5 represents the 5 chlorine atoms.

7 0

3 years ago

Read 2 more answers

You are performing a titration of a triprotic acid, when you spill water on your lab notebook. you can read that: pka 1 = 1.40,

eimsori [14]

According to the PH formula:
PH= Pka +㏒ [strong base/weak acid]
when we have PH at the first equivalence =3.35 and the Pka1 = 1.4
So, by substitution, we can get the value of ㏒[strong base / weak acid]
3.35 = 1.4 + ㏒[strong base/ weak acid]
∴㏒[strong base/weak acid] = 3.35-1.4 = 1.95
to get the Pka2 we will substitute with the value of ㏒[strong base/ weak acid] and the value of PH of the second equivalence point
∴Pk2 = PH2 - ㏒[strong base/ weak acid]
= 7.55 - 1.95 = 5.6

5 0

3 years ago

A 15.6 grams of ethanol absorb 868 J as it is heated. The initial temperature is 21.5 degrees Celsius. What is the final tempera

77julia77 [94]

You have to use the equation q=mcΔT and solve for T(final).
T(final)=(q/mc)+T(initial)
q=the amount of energy absorbed or released (in this case 868J)
m=the mass of the sample (in this case 15.6g)
c= the specific heat capacity of the substance (in this case 2.41 J/g°C)
T(initial)=the initial temperature of the sample (in this case 21.5°C)

When you plug everything in, you should get 44.6°C.
Therefore the final temperature of ethanol is 44.6°C

I hope this helps. Let me know if anything is unclear.

3 0

2 years ago