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3 years ago

Which list correctly describes the usual order of planets inward toward the sun?

Chemistry

2 answers:

cluponka [151]3 years ago

5 0

D is the answer. N, U, sat, J, mars, e, v, mer

san4es73 [151]3 years ago

4 0

Answer: D. N,U,SAT,J,MARS,E,V,MER

Explanation:

The solar system has 8 planets - 4 inner planets which are terrestrial and 5 Jovian outer planets. These are separated by asteroid belt present between the orbit of mars and Jupiter.

The order of planets inwards towards the Sun is:

Neptune, Uranus, Saturn, Jupiter, Mars, Earth , Venus and Mercury.

Some facts about these planets are:

Mercury is the first planet nearest to Sun and smallest planet of the solar system.

Venus is the hottest planet. The sun rays are trapped in the atmosphere.

Earth is the only planet where life exists.

Mars is known as the red planet because of the presence of iron oxide on its surface.

Jupiter is the biggest planet.

Saturn has beautiful ring system which can be seen from Earth. Saturn's density is very less. It can float in water.

Uranus and Neptune are blue in color due to presence of Methane in their atmosphere.

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Why is sodium more reactive than lithium

Elis [28]

Answer:

Sodium is more reactive than lithium because as we move down a group it is easy to lose electrons as the number of shells increases and nuclear charge decreases. As valence electrons take part in chemical reaction and its easier to lose electrons as we move down a group chemical reactivity increases. Therefore, sodium is more reactive than lithium.

Explanation:

I gotcha I searched it up

4 0

4 years ago

Read 2 more answers

1.) I am in period two and have an atomic mass of eleven. Who am I?

zavuch27 [327]

1.)Boron

2.)Cadmium has 48 electrons not 121 Mercury has 80 And Copernicum so they all have no 121 electrons

3.)Hydrogen

8 0

3 years ago

Which sentence correctly explains the process and conditions needed for sleet to form?

laiz [17]

Answer:Sleet only happens under very specific weather conditions. There must be a layer of air near the ground whose temperature is below freezing, where water turns to ice. Above this layer of freezing air must be a layer of warmer air. As snow falls through the warm air, it melts or partially melts into raindrops.

Explanation:

3 0

3 years ago

Suppose you wish to apply SSA to a triangle, in order to find an angle

emmasim [6.3K]

First of all there nothing exists something like SSA congruence criterion, It is SAS Congruence where the sides of a Triangle and the angle between them is exactly same to the other two sides and angle between them of another triangle.

So the correct option is D.

Explanation:

If the Triangle has two sides equal, so the two angles there are equal. Also the other angle be some other definite angle. So

45+x+x=180(Considering definite angle to be 45)
2x=135
x=67.5

So there is only one solution to the triangle.

8 0

3 years ago

50.00 mL of 0.10 M HNO 2 (nitrous acid, K a = 4.5 × 10 −4) is titrated with a 0.10 M KOH solution. After 25.00 mL of the KOH sol

boyakko [2]

Answer:

b. 3.35

Explanation:

To calculate the pH of a solution containing both acid and its salt (produced as a result of titration) we need to use Henderson’s equation i.e.

pH = pKa + log ([salt]/[acid]) (Eq. 01)

Where

pKa = -log(Ka) (Eq. 02)

[salt] = Molar concentration of salt produced as a result of titration

[acid] = Molar concentration of acid left in the solution after titration

Let’s now calculate the molar concentration of HNO2 and KOH considering following chemical reaction:

HNO2 + KOH ⇆ H2O + KNO2 (Eq. 03)

This shows that 01 mole of HNO2 and 01 mole of KOH are required to produce 01 mole of KNO2 (salt). And if any one of them (HNO2 and KOH) is present in lower amount then that will be considered the limiting reactant and amount of salt produced will be in accordance to that reactant.

Moles of HNO2 in 50 mL of 0.01 M HNO2 solution = 50/1000x0.01 = 0.005 Moles

Moles of KOH in 25 mL of 0.01 M KOH solution = 25/1000x0.01 = 0.0025 Moles

As it can be seen that we have 0.0025 Moles of KOH therefore considering Eq. 03 we can see that 0.0025 Moles of KOH will react with only 0.0025 Moles of HNO2 and will produce 0.0025 Moles of KNO2.

Therefore

Amount of salt produced i.e [salt] = 0.0025 moles (Eq. 04)

Amount of acid left in the solution [acid] = 0.005 - 0.0025 = 0.0025 moles (Eq.05)

Putting the values in (Eq. 01) from (Eq.02), (Eq. 04) and (Eq. 05) we will get the following expression:

pH= -log(4.5x10 -4) + log (0.0025/0.0025)

Solving above we get

pH = 3.35

5 0

4 years ago