Earths outer core is made of ___

Answers

Answer 1

Answer:

iron and nickel (liquid metal )

Explanation:

The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances. The outer core is responsible for Earth’s magnetic field. As Earth spins on its axis, the iron inside the liquid outer core moves around

Answer 2

Answer:

The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances.

Explanation:


Related Questions

True/False: The definition of an ion is when the number of neutrons of an atom changes from the original neutral state.

Answers

Answer:

False. a ion is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Explanation:

Calculate the number of moles in 15.5g of CaSO4.5H2O

Answers

Answer:

No. of moles = 0.0685

Explanation:

Given mass, m = 15.5g

We need to find the number of moles in 15.5 g of CaSO₄.5H2O

First, we find the mass of CaSO₄.5H2O.

M = (1×40)+(1×32)+(4×16)+(5×18)

M = 226 g/mol

We know that,

Number of moles = given mass/molar mass

[tex]n=\dfrac{15.5\ g}{226\ g/mol}\\\\n=0.0685\ \text{mol}[/tex]

Hence, there are 0.0685 moles in 15.5 g of CaSO₄.5H2O.

Which best describes a hydrate?

A.) It has water molecules bonded directly to it.
B.) It lacks water molecules ik it’s crystal lattice.
C.) It lacks hydrogen and oxygen atoms, which make up water.
D.) It has water molecules incorporated into its crystal lattice.

Answers

D is your best answer

Physical or Chemical change?

Answers

Answer:   Chemical Change

Explanation:

because it probably doesnt change the physical anatomy of the object only the atoms/ molecule relations

Ok so I don't understand how to do this-
Can someone explain how?

Shanghai, China (31° N, 121° E)

1. 24-hr Average Yearly Temperature in ºC

2. Total Yearly Precipitation in mm

Answers

Answer:

Oh, you are supposed to look up the yearly temp, and yearly rain for a certain area. I did this before!

How to Balance __MgF2 + __Li2CO3 + __ LiF

Answers

__MgF2 + __Li2CO3 + __ 2LiF

Pedro created the following table for his observations on balanced and unbalanced forces. He forgot to record some of the information. Which two measurements correctly complete the table?






A. 50 N in row one and 100 N in row two

B. 100 N in row one and 30 N in row two

C. 100 N in row one and 60 N in row two

D. 90 N in row one and 50 N in row two

Answers

Answer:

Option B. 100 N in row one and 30 N in row two

Explanation:

To know the the correct answer to the question, do the following:

For Row 1:

Force to the right (Fᵣ) = 100 N

Net force (Fₙ) = 0 (since it is balanced)

Force to the left (Fₗ) =?

Fₙ = Fᵣ – Fₗ

0 = 100 – Fₗ

Collect like terms

0 – 100 = – Fₗ

– 100 = – Fₗ

Multiply through by –1

Fₗ = 100 N

For Row 2:

For the net force to be unbalanced, it means that one of the force is greater or lesser than the other.

In the question given above, the force to the left is given as 50 N and it show it is greater than the force to be right. The other force must be lesser than 50 N to result in unbalanced force according to the illustration from the question.

From the options given above, option B has a lesser force (i.e 30 N) for row 2 compared to option C which has a greater force (60 N) for row 2.

Therefore, option B gives the correct answer to the question.

Give the formula of the alkanes his molecule contains 28 hydrogen atoms

Answers

Answer:

jayfeather friend me

Explanation:

Table 1. Summary of the Straight-Chain Alkanes

Name Formula Number of Structural Isomers

Octadecane C18H38

Nonadecane C19H40

Eicosane C20H42 366,319 (!)

29 more rows

The formula of the alkanes the molecule contains 28 hydrogen atoms is [tex]C_1_3H_2_8[/tex], i.e., tridecane.

What are alkanes?

Alkanes are organic compounds made up entirely of single-bonded carbon and hydrogen atoms with no other functional groups.

Alkanes have the general formula CnH2n+2 and are classified into three types: linear straight-chain alkanes, branched alkanes, and cycloalkanes.

Alkanes are important raw materials in the chemical industry and the main component of gasoline and lubricants.

Natural gas is primarily composed of methane and ethane and is used for heating, cooking, and power generation (gas turbines).

Natural gas and petroleum are separated from the alkanes. Natural gas is primarily composed of methane, with trace amounts of other low molecular weight alkanes.

All other alkanes are derived from petroleum, which is a complex mixture of many compounds.

Here, the formula for 28 hydrogen atom containing alkane is

[tex]C_1_3H_2_8[/tex]

Thus, this given formula is of tridecane.

For more details regarding alkanes, visit:

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Help pls!!!!!!!!!!!!!!!!!!!

Answers

Answer:

water

Explanation:

water is made up of both hydrogen and oxygen (h2o)

Which refers to any disturbance that carries energy from one place to another?

Answers

Answer:

A wave

Explanation:

A wave is a disturbance that carries energy from one place to another. Matter is not carried with the wave but instead a wave can move through matter.

Answer:

A Wave

Explanation:

why do you think coal and petroleum are diffrent

Answers

Answer:

those both are fossil fuel but coal is used for electricity,Petroleum is used for bikes

If a substance has a large mass and a small volume how dense is it

Answers

Answer:

Very dense.

Explanation:

Conceptually, you are taking a large amount of atoms and putting them into a small container.  This means the spaces between atoms has to be smaller and the substance is more dense. (see image)

Mathematically, the equation for density is mass divided by volume ([tex]Density=\frac{m}{v}[/tex] ). If you divide a big number by a small number, you still have  a pretty big number (ex 4/2=2 versus 6/1=6)

1-bromobutane undergoes dehydrohalogenation by an elimination reaction when heated in the presence of base. what is the identity of the organic product

Answers

Answer:

1-butene

Explanation:

In this case, the problem is already stating and saying the reaction involved here.

1-bromobutane undergoes a dehydrohalogenation in presence of a base. This will cause an elimination reaction forming a product.

As this is an elimination product, this can be done in two ways.

The first way is with an unimolecular reaction where the halide is eliminated from the starting reactant in a two step reaction involving a carbocation formation. This is known as E1 reaction. However, the conditions for this reaction is to be in acid medium.

The second way is with a bimolecular reaction where the halide is eliminated from the starting reactant in just one step, and no carbocation is formed. This is known as E2 reaction and is commonly used with bases.

In the case of this problem, we are undergoing an E2 reaction, therefore, the mechanism of reaction is just one step, and when this happens, the base substract the hydrogen from Carbon 2, eliminates the bromide and forms a double bond, giving the 1-butene.

You can see the mechanism in the following picture.

Hope this helps

1-butene is the organic byproduct of 1-bromobutane's dehydrohalogenation in the presence of a base.

In the process of dehydrohalogenation, a molecule loses both a hydrogen and a halogen atom (such as a halogen from chlorine, bromine, or iodine) to create an unsaturated compound. The production of alkenes or alkynes, which are crucial in organic chemistry, is frequently accomplished using this reaction. Eliminating a hydrogen halide (HX) from a halogenoalkane or alkyl halide is the most important step in dehydrohalogenation. The E1 and E2 reactions are the two basic processes that can be used to do this. There are two steps in the E1 reaction. The halogenoalkane first passes through ionisation and creates a carbocation intermediate.

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A reaction mixture in a 5.19 L flask at a certain temperature contains 26.9 g CO and 2.34 g H2. At equilibrium, the flask contains 8.65 g CH3OH. Calculate the equilibrium constant (Kc) for the reaction at this temperature.

Answers

Answer:

26.7

Explanation:

The reaction that takes place is:

CO + 2H₂ ↔ CH₃OH

We convert the given masses to moles, using their respective molar masses:

CO ⇒ 26.9 g ÷ 28 g/mol = 0.961 molH₂ ⇒ 2.34 g ÷ 2 g/mol = 1.17 molCH₃OH ⇒ 8.65 g ÷ 32 g/mol = 0.270 mol

The initial concentrations for each species are:

CO ⇒ 0.961 mol / 5.19 L = 0.185 MH₂ ⇒  1.17 mol / 5.19 L = 0.225 MCH₃OH ⇒ 0

While the equilibrium concentration for CH₃OH, [CH₃OH]eq is:

0.270 mol / 5.19 L = 0.052 M

We put the data in a table:

            CO      + 2H₂    ↔    CH₃OH

initial    0.185        0.225      ↔      0

eq          (0.185 - x) (0.225-2x)  ↔  x

We know that x = 0.052 M (That's the equilibrium concentration of CH₃OH).

We proceed to calculate [CO]eq and [H₂]eq:

[CO]eq = 0.185 - 0.052 = 0.133 M[H₂]eq = 0.225 - 2*0.052 = 0.121 M

Finally we calculate the equilibrium constant:

Kc = [tex]\frac{[CH_3OH]_{eq}}{[CO]_{eq}([H_2]_{eq})^2}[/tex] = 26.7

The equilibrium constant (Kc) for the reaction at this temperature is 26.7

Chemical reaction:

CO + 2H₂   ⇄   CH₃OH

Conversion of moles:

CO ⇒ [tex]\frac{26.9 g}{28 g/mol} = 0.961 mol[/tex]

H₂ ⇒  [tex]\frac{2.34 g }{ 2 g/mol} =1.17 mol[/tex]

CH₃OH ⇒ [tex]\frac{8.65 g}{32 g/mol} = 0.270 mol[/tex]

The initial concentrations for each species are:

CO ⇒ [tex]\frac{0.961 mol}{5.19 L} = 0.185 M[/tex]

H₂ ⇒  [tex]\frac{1.17 mol}{5.19 L } = 0.225 M[/tex]

CH₃OH ⇒ 0

While the equilibrium concentration for CH₃OH, [CH₃OH]eq is:

[tex]\frac{0.270 mol}{ 5.19 L} = 0.052 M[/tex]

We put the data in a table:

                                  CO   +   2H₂   ⇄    CH₃OH

Initial                         0.185        0.225           0

Equilibrium              (0.185 - x) (0.225-2x)    x

x = 0.052 M (That's the equilibrium concentration of CH₃OH).

We proceed to calculate [CO]eq and [H₂]eq:

[tex][CO]_{eq}= 0.185 - 0.052 = 0.133 M\\\\\\[H_2]_{eq} = 0.225 - 2*0.052 = 0.121 M[/tex]

Calculation of  equilibrium constant:

[tex]K_c =\frac{[CH_3OH]_{eq}}{[CO]_{eq}[H_2_{eq}]^2} = 26.7[/tex]

Thus, the equilibrium constant (Kc) for the reaction at this temperature is 26.7

Find more information about Equilibrium constant here:

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How many carbon dioxide molecules should be added to the products side to obey the law of conservation of matter?
Your answer:
A.four
B.One
C.three
D.two

Answers

Answer:

four A

Explanation:

Answer: B) One

Explanation: One carbon dioxide molecule should be added to the products side to balance the equation and obey the law of conservation of matter.

Also, just took the test. One is correct.

How many atoms are in 2.12 mole of propane

Answers

Answer:

More exactly this number is 6.02 x 1023 10 2 3 .

It happens when you multiply the numbers

Natural Phenomena that cause climate change
(Need at least 2)

Answers

Answer:

1. The Earth's orbit around the Sun is an ellipse, but it does change shape. ...

The tilt in the axis of the Earth is called its obliquity

Explanation:

2.Volcanic eruptions pump out clouds of dust and ash, which block out some sunlight.

Sam is pushing a large rock over the ground. ALL BUT ONE of the following terms relates to the movement of the rock. What term is it? A) force B) friction C) mass D) size​

Answers

Answer:

C) Mass

Explanation:

mass!! it talked about size when it said “large rock”.

How does the appearance of a substance change when it
changes phase?

Answers

Answer:

Melting: the substance changes back from the solid to the liquid. Condensation: the substance changes from a gas to a liquid. Vaporization: the substance changes from a liquid to a gas. Sublimation: the substance changes directly from a solid to a gas without going through the liquid phase.

Explanation:

The change in appearance of a substance when it changes its phase includes :

Change in volume Change in texture and Change in shape

Change in volume : when a liquid substance is heated to its boiling point ( vaporization) the volume of the liquid substance will change when it turns into gas because gases have no definite volume or shape.

Change in Texture: When water freezes it changes its state from a liquid state to a solid state, also the appearance of the liquid water will undergo changes in its texture when it is in its' solid state ( i.e. the texture of ice is not exactly the texture of liquid water )  

Change in shape : when a solid substance changes its state from solid to gas ( sublimation ) the shape of the solid substance will be lost during the phase change.

Hence we can conclude that the change in the appearance of a substance when it changes its phase include. Change in volume, Change in texture and Change in shape.    

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help me please i do not understand

Answers

Answer:

1 g/cm3

Explanation:

The formula for density is mass/volume

The mass is 100 g and the volume is 100 cm3

100 g/100 cm3=1 g/cm3

2021 by Mrs. Groves Closes at 2/9/2021, 12
Which layer of Earth is divided into plates?
Mantle
Crust
Inner core
Outer core

Answers

Answer:

It would be the Mantle,I believe

14.86 ml + 15.0 ml + 14.980 ml =

Answers

Answer:

44.84 ml

Explanation:

14.86

+

15.0

+

14.980

_______

44.84

How many moles of nitrogen are in 100.0 grams of barium nitrate?

Answers

Answer:

Hope this help you

Explanation:

The answer is 261.3368. We assume you are converting between grams Barium Nitrate and mole. You can view more details on each measurement unit: molecular weight of Barium Nitrate or mol The molecular formula for Barium Nitrate is Ba(NO3)2.

Answer:

0.382

Explanation:

Which of the following is an example of a mixture and not a compound?
O Water
O Salt
O Lemonade
O Carbon Dioxide

Answers

an example of a mixture is Lemonade

How many grams of H2O are needed to produce 150 g of Mg(OH)2? (Molar mass: H2O = 18.02 g/mol; Mg(OH)2 = 58.33 g/mol )

Answers

Answer:

92.6

Explanation:

6 mol x 18.02 g of H2o --> 3 mol x 58.33 g  Mg(OH)2

108.12 g of h2o --> 174.99 of Mg(OH)2

g of H2O is 150 g of Mg(OH)2

150g x 108.12g / 174.99 =

92.67

Alright
Ooh, yeah
I'll admit, I was wrong, what else can I say, girl?
Can't you blame my head and not my heart?
I was drunk, I was gone, that don't make it right, but
I promise there were no feelings involved, mmh
She said, "Boy, tell me honestly
Was it real or just for show?", yeah
She said, "Save your apologies
Baby, I just gotta know"
How long has this been goin' on?
You been creepin' 'round on me
While you're callin' me "baby"
How long has this been goin' on?
You've been actin' so shady (shady)
I've been feelin' it lately, baby
Ooo-oh (yeah)
Ooo-oh (encore)
Oooh-ooh-oh

Answers

NEVER GONNA GIVE YOU UP,

NEVER GONNA LET YOU DOWN,

NEVER GONNA RUN AROUND AND DESERT YOU!

NEVER GONNA MAKE YOU CRY,

NEVER GONNA SAY GOODBYE..

Answer:

How long By Charlie Puth

Would you consider an aquifer a renewable resource? Why or why not?

Answers

Answer:

an aquifer is a renewable resource

Explanation:

Aquifers are defined as the groundwater found deep in the layers of rocks.

An aquifer is considered as a renewable resource because groundwater is renewed over time. Aquifers are water resources and follow hydrological cycle through which it can renew itself.

Some of the deep aquifers are considered as  nonrenewable resource because it toll hundreds of years to accumulate.

Hence, the correct answer is yes an aquifer is a renewable resource except some deep aquifers.

(10 points) A basement (with volume V) in a residence is found to be contaminated with radon coming from the ground through the floor drains. The concentration of radon in the room is [Co] under steady-state conditions. The room behaves as a CSTR, and the decay of radon is a firstorder reaction with a decay rate constant of [k]. a. Now the condition changes: The source of radon is closed off but there is no ventilation. What is the equation that describes the concentration of radon in the basement with time [Ct]

Answers

Answer:

[tex]\mathbf{C_{Out} = C_o \ exp \Big [ - \Big ( \dfrac{1}{\dfrac{V}{Q} } + k \Big) t \Big ] }[/tex]

Explanation:

The equation that describes the concentration of the radon in the basement with time Ct is;

[tex]\mathbf{C_{Out} = C_o \ exp \Big [ - \Big ( \dfrac{1}{\theta} + k \Big) t \Big ] }[/tex]

where;

[tex]C_o[/tex] = concentration of the radon

[tex]C _ {Out}[/tex] = allowable radon concentration

k = decay rate constant

= theoretical detention

t = time needed to lower the radon concentration

The theoretical detention [tex]\theta =\dfrac{V}{Q}[/tex]

[tex]\mathbf{C_{Out} = C_o \ exp \Big [ - \Big ( \dfrac{1}{\dfrac{V}{Q} } + k \Big) t \Big ] }[/tex]

The photograph shows one of the boats in a science club's toy boat race. All the boats were powered by identical
rubber bands. Judges used stopwatches to time how long each rubber band took to unwind. The table shows some
of the data the judges collected.
Boat
Time
(5)
Acceleration
(m/s)
N
1.6
1.4
1.1
Mass of
Boat (kg)
0.125
0.116
0.130
0.118
P
Penywise/Dreamstime.co
Q
1.5
1.2
2.1
1.0
1.8
R
Which boat experienced the greatest unbalanced force?

Answers

Answer:

Boat p

Explanation:

Answer:

boat p

Explanation:

A pi bond involves: Select the correct answer below: direct orbital overlap with the electron density concentrated along the internuclear axis. side-by-side, or lateral orbital overlap with the electron density concentrated on opposite sides of the internuclear axis. side-by-side, or lateral orbital overlap with the electron density concentrated along the internuclear axis. none of the above

Answers

Answer:

side-by-side, or lateral orbital overlap with the electron density concentrated on opposite sides of the internuclear axis.

Explanation:

Pi bond is a type of covalent bond in which the internuclear axis has regions of orbital overlap below and above it i.e on opposite sides. As a result of the orbital overlap, a node is created along the internuclear axis.

This ultimately implies that, a pi bond is formed due to the lateral (side-by-side) overlap of the unhybridized P-orbital comprising of at least a node along the internuclear axis.

Hence, a pi bond involves side-by-side, or lateral orbital overlap with the electron density concentrated on opposite sides of the internuclear axis.

Additionally, a node is typically formed where an electron cannot be found.

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