Can someone help me please

Can Someone Help Me Please

Answers

Answer 1

Answer:

4) x = 4

Explanation:

Using Intersecting Chords Theorem,

AB × CB = BE × BD

( 4x + 2) × 8 = 9 × ( 4x ) 32x + 16 = 36x16 = 36x -32x (Subtract)16 = 4x (Divide both sides by 4)x = 16/ 4 (Divide)x = 4--------------------------

Related Questions

not sure on what to do

Answers

Answer:

It's the first answer

Explanation:

Aqueous just means that the solution is just dissolved in water

What does the author predict about the future of the Earth's mantle? Do you support his educated guess? Use complete sentences to answer.

Answers

The earth's mantle will not change in the future because this region is safe from the intervention of human beings.

What happens in the Earth's mantle?

The transfer of heat and material in the mantle helps us to determine the landscape of Earth. Activity in the mantle moves the plate tectonics, that contributes to volcanoes, seafloor spreading, earthquakes, and building of mountains.

So we can conclude that the earth's mantle will not change in the future because this region is safe from the intervention of human beings.

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Which of the following compounds would make a good electrolyte?
Select one:
O a. ethanol
O b. carbon dioxide
O c. sodium chloride
O d. water

Answers

Answer:

C. Sodium Chloride.

Explanation:

Because when NaCl dissolved in water, it will dissociate to produce 2 ions Na+ and Cl-.

b. sodium chloride, aka salt. is a commonly used electrolyte.

How many atoms from the following molecule will be detected in a 13c nmr experiment? we are not asking for unique signals, just total number of atoms

Answers

The structure of the compound, there will be ten unique signals in the carbon 13 NMR of the compound.

What are NMR signals?

The NMR signals shows the atoms in a compound that are in unique chemical environments. The atoms that are in the same chemical environment will only give one signal.

Based on the structure of the compound, there will be ten unique signals in the carbon 13 NMR of the compound.

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When water vapor cools, it condenses.
Which number represents this process on the hydrologic cycle
diagram?
O 1
02
O 3
04

Answers

The correct name is 2

Number 2 represents this process on the hydrologic cycle diagram. Therefore, the correct option is option B.

What is hydrologic cycle?

One of the most significant natural processes is the hydrologic cycle, which we may often take for granted. This process causes the water in the entire earth to change forms, locations, or accessibility.

Water transitions between three distinct forms during this cycle, to put it simply. It can be found in many states of liquid, gas, or solid, including ice, steam, and water. Water will frequently transition between these three states throughout the cycle: freezing into ice, melting into water, evaporating becoming water vapor, but finally condensing back into water. Number 2 represents this process on the hydrologic cycle diagram.

Therefore, the correct option is option B.

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Based on these images, what can you conclude about the organisms?

Answers

The process of  embryonic development is the process by which the fetus of an organism is developed.

What is embryonic development ?

The process of  embryonic development is the process by which the fetus of an organism is developed.

We know that all vertebrates are the same at the embryonic stage as shown in the image. Hence the following statements are true;

They have similarities in their embryonic stages that don’t exist in their adult formsThey all contain a backbone, or spinal column

Missing parts

Based on these images, what can you conclude about the organisms?

1)They’re a mixture of vertebrates and invertebrates.

2)They have similarities in their embryonic stages that don’t exist in their adult forms.

3)They all undergo metamorphosis.

4)They all contain a backbone, or spinal column.

5)They’re the same species of organism.

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A sealable bag holds 3.79 L of
gas. How many moles of H₂
gas are needed to fill the bag
at 1.0 atm and 293 K?

Answers

The H₂ gas are needed 0.157moles to fill the bag .

For solving this problem  we use the ideal gas equation. It is also called the general gas equation . This equation use for a hypothetical ideal gas. . It has several limitations. It was first stated by Benoit Paul Emile Clapeyron in 1834 . The ideal gas law is  written by an empirical form:

                                  PV = n R T

where-

            P = Pressure

            V = volume

            T = Temperature

            n =  The amount of substance

            R =  Ideal gas constant

Now we have the values of these terms as-

             P = 1 atm , V = 3.79L ,  T = 293K

 and     R = 0.0826 L/atm

For getting moles of hydrogen we can use the values of variables in ideal gas equation as -

                     P V = n R T

Now              (1 atm) × ( 3.79L ) = n ×  ( 0.0826 L/atm)  × ( 293K)

                                            n = (1 × 3.79) ÷ (0.0826 x 293)

                                              =  0.157 moles

So that the 0.157moles of H₂ gas are needed for fill the bag .

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Use the following scenario to calculate the carbon flux in the atmosphere. The amount of carbon that enters the atmosphere through natural processes is 211.6 GtC/yr and the amount that leaves the atmosphere through natural processes in 213.8 GtC/yr. The amount of carbon released by burning fossil fuels is 5.5 GtC/yr. What is the carbon flux in the atmosphere

Answers

The amount of carbon flux in the atmosphere will be 3.3 GtC/yr

Carbon flux calculation

The carbon flux in the atmosphere can be calculated by:

1. Removing the amount of carbon that leaves the atmosphere from the amount that enters the atmosphere.

2. Adding the amount of carbon released by fossil fuel burning.

Thus,

Carbon flux = 211.6 - 213.8 + 5.5 = 3.3 GtC/yr

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Which of the following shows the combustion of a hydrocarbon?
OA. NaOH + HCI → NaCl + H₂O
OB. CO₂ + H₂O → H₂CO3
OC. 2C₂H₂ +502 + 4CO2 + 2H₂O
OD. C₂H4 + Cl₂ ⇒ C₂H4Cl₂​

Answers

Answer:

C

Explanation:

with combustion you must know that your products must be carbon dioxide and water. I think you copied your question incorrectly.

What does a particular point on a line of a phase diagram represent?
A. The pressure created by the kinetic energy of molecules at a
particular temperature
B. The maximum temperature a substance can exist at without
bonds breaking
OC. The melting point or boiling point of a substance at a specific
pressure
OD. The conditions in which temperature and pressure have equal
effects on a substance

Answers

Answer:

The point at which the lines intersect represents the triple point.

calculate mole fraction of benzene (70 g) having 30 gram of mass of carbon tetrahedral​

Answers

Answer:

0.736

Explanation:

*I am not sure what you mean by "carbon tetrahedral". I'm assuming you are just referring to individual carbon.*

To find the mole percent, you need to (1) convert grams benzene and grams carbon to moles (via their molar masses) and then (2) calculate the mole fraction (via the mole fraction formula).

(Step 1)

Benzene = C₆H₆

Molar Mass (C₆H₆) = 6(12.01 g/mol) + 6(1.008 g/mol)

Molar Mass (C₆H₆) = 78.108 g/mol

70 g C₆H₆          1 mole
---------------  x  ------------------  =  0.896 mole C₆H₆
                         78.108 g

Molar Mass (C) = 12.01 g/mol

30 g C           1 mole
------------  x  -----------------  =  2.50 mole C
                       12.01 g

(Step 2)

                                           moles solute
Mole Fraction  =  ----------------------------------------------
                              moles solute + moles solvent

                                              2.50 mole C
Mole Fraction  =  -------------------------------------------------  =  0.736
                             (0.896 mole C₆H₆ + 2.50 mole C)

Ammonia, NH3(g), can be used as a substitute for fossil fuels in some internal combustion
engines. The reaction between ammonia and oxygen in an engine is represented by
the unbalanced equation below.
NH3(g) + O₂(g) →→ N₂(g) + H₂O(g) + energy
6. Balance the equation in the space below for the reaction of ammonia and oxygen, using the
smallest whole-number coefficients.

Answers

Answer:

4 NH₃ (g) + 3 O₂ (g) ----> 2 N₂ (g) + 6 H₂O (g) + energy

Explanation:

The unbalanced equation:

NH₃ (g) + O₂ (g) ----> N₂ (g) + H₂O (g) + energy

Reactants: 1 nitrogen, 3 hydrogen, 2 oxygen

Products: 2 nitrogen, 2 hydrogen, 1 oxygen

The sort-of balanced equation

2 NH₃ (g) + 1/2 O₂ (g) ----> N₂ (g) + 3 H₂O (g) + energy

I first started by balancing the nitrogens. This then lead me to balance the hydrogens. When I went to balance the oxygens, only a 1/2 coefficient would work. However, 1/2 coefficients are technically incorrect. To get rid of this coefficient, you need to multiply each coefficient by 2.

The balanced equation:

4 NH₃ (g) + 3 O₂ (g) ----> 2 N₂ (g) + 6 H₂O (g) + energy

Reactants: 4 nitrogen, 12 hydrogen, 6 oxygen

Products: 4 nitrogen, 12 hydrogen, 6 oxygen

Now, all of the elements are equal on both sides and there are no 1/2 coefficients. These are the smallest whole-number coefficients because some of the numbers cannot be further simplified (3).

Lead (II) acetate reacts with sodium hydroxide to produce lead (II) hydroxide and sodiumacetate. Please write the chemical equation and *don't* balance the sides!

Answers

The chemical equation is:

Pb(CH₃COO₎₂ + NaOH  ---> Pb(OH)₂ + CH₃COONa

What is a chemical equation of a reaction?

A chemical equation of a reaction is an equation which shows the reactants and products of a reaction using their chemical formulae.

The chemical equation when Lead (II) acetate reacts with sodium hydroxide to produce lead (II) hydroxide and sodium acetate is given below:

Pb(CH₃COO₎₂ + NaOH  ---> Pb(OH)₂ + CH₃COONa

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Explain how you know it must be oxygen. Where
did the oxygen come from?
Intro
Previous Activity
I
000
O Tutoring Help

Answers

Answer:

oxygen is a present in our atmosphere and mixed with other gases on the surrounding screen plants are also measure source of getting oxygen they take carbon dioxide from making their food by for the cities and give away oxygen in return

Explanation:

most of the earth oxygen comes from tiny Ocean plants are called phytoplaston

How many moles of oxygen gas (02) are needed to completely react with 54.0 g of aluminum?
4A1+30₂2Al₂O3

54.0 g Al
1 mol Al
26.98 g Al

3 mol O₂
4 mol Al

[?] mol O₂

Answers

1.5 moles of [tex]O_{2}[/tex] gas

Reaction of Al with [tex]O_{2}[/tex] to form [tex]Al_{2} O_{3}[/tex] is given below...

2 Al + 1.5 [tex]O_{2}[/tex] → [tex]Al_{2} O_{3}[/tex]

Here, 2 moles of Aluminum reacts with 1.5 moles of [tex]O_{2}[/tex]

atomic weight of aluminum = 27 g / mole

so, 1 mole of aluminum contains 27 g

then how many moles are there if it has 54 g in it.

moles of aluminum in 54 g = 54/27 = 2 moles

As per the equation mentioned above,

2 moles of aluminum reacts with 1.5 moles of [tex]O_{2}[/tex].

1.5 moles of oxygen gas (02) are needed to completely react with 54.0 g of aluminum.

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A 126.1-gram block of granite at 92.6°c is dropped into a tub of water at 24.7°c in an isolated system. the final temperature of both the granite and the water is 51.9°c. the specific heat capacity of granite is 0.795 joules/gram degree celsius, and the specific heat capacity of water is 4.186 joules/gram degree celsius. the granite block transferred of energy, and the mass of the water is .

Answers

The granite block transferred 4,080 joules of energy, and the mass of the water is 35.8 grams.

How we calculate heat transfer of any system ?

Heat transfer in any system can be calculated as follow:

q = mCΔT

Given ;

m = mass of granite = 126.1 g C = specific heat of granite = 0.795 joules/gram degree CelsiusΔT = change in temperature of granite = 51.9 °C - 92.6 °C = -40.7 °C

Putting all the values in folowing equation,

q = mCΔT

we get

q = 126.1 × 0.795 × -40.7 = -4080 J

Now by using same formula, we can also calculate the mass of water in the following way:

m = q / CΔT

where

C = specific heat of water = 4.186 joules/gram degree Celsius ΔT = change in temperature of water = 51.9 °C – 24.7 °C = 27.2 °C

Putting all these values ;

m = -4080 /  4.186 × 27.2 = 35.8 g.

Hence, 4,080 joules of energy is transferred by granite block and 35.8 g is the mass of water.

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Does an electron cause an electromagnetic wave to vibrate

Answers

Yes, an electron cause an electromagnetic wave to vibrate.

What is an electromagnetic wave?

One of the waves is propagated by simultaneous periodic variations of electric and magnetic field intensity and that includes radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Electromagnetic waves are produced when something vibrates—an electric charge that moves back and forth.

When an electric charge vibrates, the electric field around it changes. Because the electric charge is in motion, it also has a magnetic field around it.

This magnetic field also changes as the charge vibrates.

Therefore, an electron causes an electromagnetic wave to vibrate.

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According to the concept of entropy, what will likely happen to most molecules over time?.

Answers

They're going to fall apart.

What most molecules will likely experience over time?

A system's entropy cannot decrease unless heat is being lost from it. This indicates that entropy cannot decrease in a closed system (i.e., nothing enters or leaves, and that means nothing at all), so it must either remain constant or rise. Entropy can decrease, rise, or stay constant in an open system when movement between the system and its surroundings is conceivable. Both of these outcomes leave open the option of a constant state.

Entropy:-

The quantity of atom-alignment combinations that can exist in a system is known as entropy. The quantity of energy that cannot be used for work can also be calculated from an object's entropy.

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This map shows the ages of the Atlantic´s oceanic crust. Which statement is supported by the information on the map?

Answers

Map shows ages Atlantic information map supported Map shows ages Atlantic information map supported Map shows ages Atlantic information map supported Map shows ages Atlantic information map supported Map shows ages Atlantic information map supported Map shows ages Atlantic information map supported

It is evident from the provided map that the African Ocean is enlarging at a divergent plate boundary. So, the correct option is B.

What is Divergent plate boundary?

When two tectonic plates diverge from one another, the area is known as a diverging plate border. New crust forms on the plate margins when the plates divide and magma rises from the mantle to fill the space. The creation of mid-ocean ridges is a result of this process, known as seafloor spreading.

Divergent plate borders can also occur on land, and they can eventually result in the formation of new ocean basins by forming rift valleys. The spreading of the seabed is aided by the divergent limits in the middle of the ocean. A fracture occurs on the ocean floor as plates made of oceanic crust move apart from one another.  

Therefore, the correct option is B.

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Your question is incomplete, most probably the complete question is:

This map shows the age of the Atlantic’s oceanic crust. Which statement is supported by the information in the map?

A. The African continental plates are undergoing continental drift.

B. The African Ocean is growing wider at a divergent plate boundary.

C. The seafloor is shrinking along a convergent plate boundary.

D. The seafloor is undergoing subduction under the North America plate.

What is the difference between glucose and fructose.

Answers

Answer:

glucose is in large sugar molecules, while fructose is in simple fruits and vegetables

glucose breaks down disaccharides or polysaccharides with large sugar molecules and fructose is found in fruits and veggies like corn, mangos, and apples. they are both carbs.

Eric pours some iced tea into a glass. When he puts the iced tea in the glass, the energy of the glass decreases. What must be true of the energy of the iced tea?

Answers

Iced tea's energy increases while the energy of the glass decreases.

What is energy?

Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms

Iced tea's energy increases while the energy of the glass decreases because the ice is getting warmer so the glass is also getting warmer. meaning that the glass is decreasing in energy while the ice tea is increasing in energy.

Hence, iced tea's energy increases while the energy of the glass decreases.

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What are some possible bias in an experiment about how sleep affects mood

HELP ASAPPPPP

Answers

Answer: Some possible bias in an experiment about how sleep affects mood could be a person's average mood with or without sleep, how people are acting in the experiment compared to how they actually would in their normal environment, or even how the person collected the data for the experiment interprets their moods.

Explanation:

1. A person's mood could be relatively different depending on other factors than just sleep, so it could affect experiment. For example if an emotional crisis had occurred recently, it could affect your mood and environmental factors could affected your mood, like weather.

2. A person could also change their mood around strangers or even when participating in the experiment. For instance if they aren't comfortable with the person taking down the analysist or the other test subjects, they make act differently than they usually do at home where they're comfortable.

3. A person collecting the data will have to know how to specify and determine a persons mood with their instruments. For example, if they're doing it just by talking with the test subjects, they'll have to know how to properly understand their different stages of each of their moods with out the data collectors mood changing as well. Also, if the data collectors mood is changed at all it can slightly affect the experiments results as well.

An exergonic reaction __________ free energy, and an endergonic reaction __________ free energy.

Answers

Answer:

An exergonic reaction releases free energy, and an endergonic reaction absorbs free energy.

Explanation:

hope it helps

Express in scientific notation. Choose the answer with the proper number of significant figures: 1.24 x 10^6/6.2 x 10^-3

Answers

Answer:

1.24×10^6/6.2×10^-3

200

acc to scientific notation: 0.2×10^3 is the answer

Explanation:

pls mark me as brainlest

what has the highest volume 1kg lead, 1kg of iron, 1kg of gold, or 1kg of copper

Answers

Answer:

1kg gold because when it's mined it needs stronger machines

1kg gold because when it's mined it needs stronger machines.

What is volume?

The amount of space occupied by a three-dimensional figure as measured in cubic units.

Gold is called a heavy metal because of its high density, which comes from the fact that each of its atoms is individually very heavy.

Hence, 1kg gold because when it's mined it needs stronger machines.

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If 0.889J of heat causes a 0.124 degree C temperature change, what mass of water is present?

Answers

0.889 ÷ 4187 ÷ 0.124 = 0.00171

The theoretical yield of NaBr from
2.36 mol FeBr3 is 7.08 mol NaBr.
What is the percent yield if 6.14 mol
NaBr were collected?

[?]%

Answers

Taking into account definition of percent yield, the percent yield for the reaction is 100%.

Reaction stoichiometry

In first place, the balanced reaction is:

2 FeBr₃ + 3 Na₂S → Fе₂S₃ + 6 NaBr

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

FeBr₃: 2 moles Na₂S; 3 molesFе₂S₃: 1 mole NaBr: 6 moles

Moles of NaBr formed

The following rule of three can be applied: if by reaction stoichiometry 2 moles of FeBr₃ form 6 moles of NaBr, 2.36 moles of FeBr₃ form how many moles of NaBr?

[tex]moles of NaBr=\frac{2.36 moles of FeBr_{3}x6 moles of NaBr }{2 moles of FeBr_{3}}[/tex]

moles of NaBr= 7.08 moles

Then, 7.08 moles of NaBr can be produced from 2.36 moles of FeBr₃.

Percent yield

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

[tex]percent yield=\frac{actual yield}{theorical yield}x100[/tex]

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

Percent yield for the reaction in this case

In this case, being the molar mass of NaBr 102.9 g/mole, you know:

actual yield= 7.08 moles× 102.9 g/mole= 728.532 gramstheorical yield= 7.08 moles× 102.9 g/mole= 728.532 grams

Replacing in the definition of percent yields:

[tex]percent yield=\frac{728.532 grams}{728.532 grams}x100[/tex]

Solving:

percent yield= 100%

Finally, the percent yield for the reaction is 100%.

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Answer: 87%

Explanation:

A(n) ________ is a dynamic sub-organization that can be created and eliminated depending on need

Answers

A(n) Business Unit is a dynamic sub-organization that can be created and eliminated depending on need.

What is Business Unit?

Business unit is when the company wants its sales in a segmented way. This market offer, or it can be, for example, business area, segment line, market performance cases.

This strategy consists of the form adopted by many companies that divide their activities into independent business units, with different results, strategies and managers.

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20) Mg + O2 → MgO
Reaction Type
synthesis (s)
decomposition (D)
single replacement (SR)
double replacement (DR) or combustion (C)

Answers

The given reaction Mg + O₂ → MgO is a type of Synthesis reaction. Hence option (1) is correct.

What is Synthesis reaction ?

Synthesis reactions are reactions that occur when two different atoms or molecules interact to form one molecule or compound.

It is also known as combination reaction

In the given reaction Mg and O combines with each other to form one product i.e, MgO. Hence, The given reaction Mg + O₂ → MgO is a type of Synthesis reaction. Thus, option (1) is correct.

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HELPP!!!
A 6.28 L balloon is filled with water at 3.93 atm. If the balloon is
squeezed into a 3.25 L beaker and does NOT burst, what is the
pressure of water in the balloon?
a. 7.59
b. 2.03
c. 80.2
d. 0.0893

Answers

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