how do convection currents help make underwater mountains

The correct answer is (d) The plant grows toward the east. Phototropism is the growth of a plant in response to a light stimulus. In this case, the plant is growing toward the east because that is the direction of the light source.

The plant's cells on the side facing the light will produce more auxin, a plant hormone that promotes growth. This will cause the cells on that side to grow longer, bending the plant toward the light. The other options are not examples of phototropism. The plant continuing to grow upward is an example of geotropism, or the growth of a plant in response to gravity. The plant growing toward the west or south is not an example of any type of tropism.

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The solution was calculated to have a boiling point of 100.167 °C.

To calculate the boiling point of the solution, use the equation:

ΔTb = Kb × m

where ΔTb = change in boiling point, Kb = boiling point elevation constant for water (0.512 °C/m), and m = molality of the solution.

First, calculate the molality of the solution:

molality (m) = moles of solute / mass of solvent (in kg)

mass of solvent = 2750 g / 1000 = 2.75 kg (conversion to kg)

moles of solute (K3PO4) = 0.900 moles

m = 0.900 / 2.75 = 0.327 mol/kg

Now calculate the boiling point elevation:

ΔTb = Kb × m = 0.512 °C/m × 0.327 mol/kg = 0.167 °C

Finally, calculate the boiling point of the solution:

boiling point of solution = boiling point of pure solvent + ΔTb

The boiling point of pure water is 100 °C, so:

boiling point of solution = 100 °C + 0.167 °C = 100.167 °C

Therefore, the boiling point of the solution is 100.167 °C.

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Answer:

The orbit of the earth is a ellipse.   Yes.  Yes

Explanation:

Answer:

is a way of presenting information about the chemical proportions of atoms

Explanation:

Answer:

Explanation:

D. i had this on my science test!!!

Answer:

D

Explanation:

yup its D

Answer:

F = 0.0725 N

Explanation:

Given that,

The mass of peach, m = 7.4 g

We need to find the force acts on the peach when it falls from a tree. The force is given by :

F = mg

So,

\(F=7.4\times 10^{-3}\times 9.8\\\\F=0.0725\ N\)

So, the force is 0.0725 N.

Asbestos is composed of fibers known to cause lung disease. However, it is important to note that both radon and lead exposure can also have negative effects on lung health.

(a) asbestos(b) radon(c) lead(d) carbon monoxide(e) formaldehydecomposed of fibers known to cause lung disease,the followings are:

(a) asbestos: Asbestos is a naturally occurring mineral that consists of flexible and durable fibers.

(b) radon: Radon is a radioactive gas that can be released from certain types of rocks and soils.

(c) lead: Lead is a heavy metal that can be found in various sources, such as paint, soil, and water.

(d) carbon monoxide: Carbon monoxide is a toxic gas that is produced by the incomplete combustion of carbon-based fuels.

(e) formaldehyde: Formaldehyde is a colorless gas with a pungent odor. It is commonly used in various products, including building materials, household cleaners, and some personal care items.

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The ion that has 26 protons, 28 neutrons, and 24 electrons is Iron (Fe) (option c).

An element can be determined by the number of protons in the nucleus of its atom. The number of protons present in an atom is referred to as the atomic number of the element.

This means that the number of protons in an atom is unique to a specific element.

Iron (Fe) has 26 protons in the nucleus of its atom.

Therefore, an ion with 26 protons is an ion of the element iron (Fe).

Magnesium (Mg) has 12 protons, Chromium (Cr) has 24 protons, Xenon (Xe) has 54 protons and Nickel (Ni) has 28 protons.

Thus, an ion which has 26 protons, 28 neutrons, and 24 electrons  is Fe (option c)

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Answer:

32,256g/mol

Explanation:

n= V/Vm

n = 0.25/22.4

n = 0.01

0.01 = 0.36/M

M = 0.36/0.01

Answer: A balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is \(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\).

Explanation:

A balanced chemical equation is defined as the equation which contains same number of atoms on both reactant and product side.

Hence, balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is as follows.

\(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\)

Here, number of atoms present on reactant side are as follows.

Number of atoms present on product side are as follows.

Since, there are same number of atoms present  on both reactant and product side. Therefore, this equation is balanced.

Thus, we can conclude that balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is \(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\).

Urea nitrate is the chemical used to make explosives is a fertilizer-based explosive, but requires nitric acid as a component to be an explosive compound, and has a wide range of uses, including as a noncorrosive de-icing material for sidewalks.

Urea nitrate is a chemical defined as fertilizer-based explosive that is produced in one step by reaction of urea with nitric acid. The reaction between urea and conc. nitric acid is an exothermic reaction, therefore, necessary steps and precautions must be taken during the reaction to ensure the safety during the process. The balanced equation of the reaction is given below:

(NH₂)₂CO (aq) + HNO₃ (aq) → (NH₂)₂COHNO₃ (s)

Urea nitrate is as easily-made explosive and can also be used as a catalyst in Diels-Alder reactions of aromatic amines.

Urea nitrate readily decomposes to its original components, urea and nitric acid in the presence of water.

Basically, urea  is used as a deicer for sidewalks as it is a de-icing material which is noncorrosive in nature. However, using it is a more costly method of deicing,  compared to other methods and it is best used where water runs off into vegetation than into a water-body or a storm drain because of its high-oxygen demand which could result in its reducing the oxygen level of the water body. It It is easily found in nature (in our urine) and is also  synthesized industrially.

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The empirical formula of the unknown compound is CH.

The empirical formula of a compound represents the simplest whole number ratio of atoms in that compound. To determine the empirical formula of the unknown compound, we need to use the information given.

First, let's calculate the moles of CO2 produced. The molar mass of CO2 is 44.01 g/mol, so:

moles of CO2 = mass of CO2 / molar mass of CO2
moles of CO2 = 8.71 g / 44.01 g/mol
moles of CO2 = 0.1979 mol

Next, let's calculate the moles of H2O produced. The molar mass of H2O is 18.02 g/mol, so:

moles of H2O = mass of H2O / molar mass of H2O
moles of H2O = 2.38 g / 18.02 g/mol
moles of H2O = 0.132 mol

Now, let's calculate the moles of carbon and hydrogen in the unknown compound. From the balanced chemical equation for the combustion, we know that for every 1 mole of CO2 produced, there is 1 mole of carbon and for every 1 mole of H2O produced, there are 2 moles of hydrogen.

moles of C = moles of CO2
moles of C = 0.1979 mol

moles of H = 2 * moles of H2O
moles of H = 2 * 0.132 mol
moles of H = 0.264 mol

Now, let's calculate the moles of oxygen in the unknown compound. Since the compound contains only carbon, hydrogen, and oxygen, we can subtract the moles of carbon and hydrogen from the total moles of the compound.

moles of O = total moles - moles of C - moles of H
moles of O = 0.1979 mol + 0.264 mol - total moles
moles of O = 0.4629 mol - total moles

Given that the mass of the unknown compound is 3.70 g, we can calculate the moles of the compound using its molar mass.

moles of compound = mass of compound / molar mass of compound
moles of compound = 3.70 g / molar mass of compound

Since we are looking for the empirical formula, we can assume a convenient mass for the unknown compound, such as 100 g. This will make it easier to find the empirical formula.

moles of compound = 3.70 g / molar mass of compound
moles of compound = 100 g / molar mass of compound

Now, we can set up an equation to find the molar ratio of carbon, hydrogen, and oxygen in the compound:

0.1979 mol / moles of compound = moles of C / moles of compound
0.264 mol / moles of compound = moles of H / moles of compound
0.4629 mol - moles of compound / moles of compound = moles of O / moles of compound

Simplifying these equations, we get:

0.1979 = moles of C
0.264 = moles of H
0.4629 - moles of compound = moles of O

Since we assumed a mass of 100 g for the compound, we can convert the moles to grams:

0.1979 mol = 0.1979 * molar mass of C
0.264 mol = 0.264 * molar mass of H
0.4629 - moles of compound = 0.4629 * molar mass of O

Now, we can find the molar masses of carbon, hydrogen, and oxygen. The molar mass of carbon is 12.01 g/mol, the molar mass of hydrogen is 1.008 g/mol, and the molar mass of oxygen is 16.00 g/mol.

0.1979 * molar mass of C = 0.1979 * 12.01 g/mol
0.264 * molar mass of H = 0.264 * 1.008 g/mol
0.4629 - moles of compound * molar mass of O = 0.4629 * 16.00 g/mol - moles of compound

Now, let's simplify and solve for the molar masses:

2.373979 g = 2.521712 g - moles of compound

moles of compound = 0.147733 g

Now, let's substitute the moles of carbon, hydrogen, and oxygen into the equation:

0.1979 = 0.1979 / 0.147733
0.264 = 0.264 / 0.147733
0.4629 - moles of compound = 0.4629 - 0.147733

Simplifying these equations, we get:

1 = 1
1 = 1
0 = 0

This means that the ratio of carbon, hydrogen, and oxygen in the unknown compound is 1:1:0. Therefore, the empirical formula of the unknown compound is CH.

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The ions formed when ch₃oh dissociates in water are Hydrogen ions (H+) and hydroxide ions (OH-).

What ions are formed when ch₃oh dissociates in water?

Hence the ions formed are Hydrogen ions (H+) and hydroxide ions (OH-).

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Answer: \(Fe^{2+}(aq)+2e^-\rightarrow Fe(s)\)

Explanation:

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

 Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

\(Mg(s)+Fe^{2+}(aq)\rightarrow Fe(s)+Mg^{2+}(aq)\)

The oxidation half reaction is:

\(Mg(s)\rightarrow Mg^{2+}(aq)+2e^-\)

The reduction half reaction is:

\(Fe^{2+}(aq)+2e^-\rightarrow Fe(s)\)

Answer:

A

Explanation:

edge

Answer:

Oil and vinegar separate because it is a suspension

Explanation:

When you let suspensions sit the particles begin to layer out, in the salad dressing the oil layers out on top of the vinegar. The two layers of oil and vinegar don't actually dissolve in each other. The layer with the lower density (oil) floats on top of the layer with a higher density (vinegar)

Water and vinegar are both hydrophilic and mix, whereas the oil is hydrophobic. Oil and vinegar separate because it is a suspension

Hydrophilic molecule are water-loving polar molecule.

They interact with water or they are dissolved in water or water like polar solvent.

For instance, the phospholipid molecules of the plasma membrane has a hydrophilic phosphate group.

Hydrophobic is a water hating  substance which can not dissolve in water, but other non-polar solvent.

Thus hydrophobic substances are lipophilic in nature  and the hydrophobic solvents are used to  separate water-immiscible substances from water.

The layers of oil and vinegar can not  dissolve with each other. The oil layer has the  lower density floats on top of the layer with a higher density product called vinegar.

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The final temperature of the 100 g sample of aluminum is 15.3°C after it absorbs 1379 J of heat at an initial temperature of 0.00°C and the specific heat capacity of aluminum is 0.903 J/g °C.

The specific heat capacity of aluminum is 0.903 J/g °C. As given in the question, 0.00°C is the initial temperature of 100 g sample of aluminum and it absorbs 1379 J of heat. We need to find out the final temperature of the sample of aluminum.

Here's how we can calculate it:

Given,Mass of aluminum, m = 100 g

Heat absorbed by the aluminum, Q = 1379 J

Temperature of aluminum, t1 = 0.00°C (initial temperature)

Specific heat capacity of aluminum, c = 0.903 J/g °C

Temperature of aluminum, t2 = ?Q = mc(t2 - t1)1379 = 100 × 0.903 × (t2 - 0.00)

On solving this equation, we get: t2 = 15.3°

, the final temperature of the 100 g sample of aluminum is 15.3°C.

: The final temperature of the 100 g sample of aluminum is 15.3°C after it absorbs 1379 J of heat at an initial temperature of 0.00°C and the specific heat capacity of aluminum is 0.903 J/g °C.

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To calculate the final temperature of a 100.0 g sample of aluminum that absorbs 1379 J of heat at 0.00 °C, we can use the specific heat capacity of aluminum to determine the amount of heat energy required to raise the temperature of the sample by one degree Celsius.

The specific heat capacity of aluminum is 0.90 J/g°C. This means that it takes 0.90 J of energy to raise the temperature of one gram of aluminum by one degree Celsius.
To calculate the amount of energy required to raise the temperature of the 100.0 g sample by one degree Celsius, we can use the following formula:
Energy = mass x specific heat capacity x change in temperature
Where:
Energy = 1379 J (the amount of energy absorbed by the aluminum)
Mass = 100.0 g
Specific heat capacity = 0.90 J/g°C
Change in temperature = final temperature - initial temperature
We can rearrange this formula to solve for the final temperature:
Final temperature = (energy / (mass x specific heat capacity)) + initial temperature
Substituting the values we know:
Final temperature = (1379 J / (100.0 g x 0.90 J/g°C)) + 0.00 °C
Final temperature = 15.32 °C
Therefore, the final temperature of the aluminum sample is 15.32 °C.

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The statement you provided refers to the determination of the van't Hoff factor (i) for strong electrolytes. The van't Hoff factor represents the number of ions produced per mole of solute dissolved in a solution.

For example, when calcium chloride (CaCl2) dissolves, it dissociates into three ions: one Ca2+ ion and two Cl- ions. Therefore, the van't Hoff factor (i) for CaCl2 is 3 because it produces three ions per mole of solute dissolved.

Similarly, when ammonium phosphate (NH4)3PO4 dissolves, it dissociates into four ions: three NH4+ ions and one PO43- ion. Thus, the van't Hoff factor (i) for (NH4)3PO4 is 4 because it yields four ions per mole of solute dissolved.

The van't Hoff factor is essential in various calculations related to colligative properties, such as boiling point elevation and freezing point depression, where it is used to account for the number of particles in solution.

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The expected major product of the given reaction sequence is t-BuBr.

In the first step of the reaction sequence, t-BuOK (tert-butoxide potassium) and t-BuOH (tert-butanol) are involved. This combination typically results in the elimination of a proton (H⁺) from t-BuOH, generating the t-butoxide ion (t-BuO⁻). The t-BuO⁻ ion then acts as a strong base and abstracts a proton from t-BuBr, leading to the formation of t-BuBr as the major product.

Therefore, the expected major product of the reaction sequence is t-BuBr.

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Two of the chemical equations above are considered as double replacement reactions.
- KBr + AgNO₃ → AgBr + KNO₃
- Na₂CO₃ + Ca(OH)₂ → CaCO₃ + 2NaOH

A double replacement reaction is a type of chemical reaction where two compounds react and exchange ions to form two new compounds. In order to determine if a chemical equation is a double replacement reaction, we need to see if the cations and anions in the reactants switch places to form new compounds.  

In the first equation, the potassium ion (K⁺) and the silver ion (Ag⁺) switch places to form silver bromide (AgBr) and potassium nitrate (KNO₃). In the second equation, the sodium ion (Na+) and the calcium ion (Ca²⁺) switch places to form calcium carbonate (CaCO₃) and sodium hydroxide (NaOH). The other equations are either single replacement, decomposition, or combination reactions.

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Step 1

It is known that at STP:

1 mole of any gas = 22.4 L

--------------------

Step 2

Information provided:

4.16 L of O2

------

Information needed:

The molar mass of H2O = 18.0 g (please, the periodic table is useful here)

-------------------

Step 3

By stoichiometry,

C3H8 + 5 O2 => 3 CO2 + 4 H2O (the reaction is completed and balanced)

5 x 22.4 L O2 ------------ 4 x 18.0 g H2O

4.16 L O2 ------------ X

X = 4.16 L O2 x 4 x 18.0 g H2O/5 x 22.4 L O2

X = 2.67 g H2O

Answer: 2.67 g H2O

decay rate of approximately 1.69x10^17 Bq (becquerels),

The decay rate of a radioactive sample is determined by the number  of radioactive atoms present and the decay constant, which represents the probability of decay per unit of time.

To calculate the decay rate, we multiply the number of atoms in the sample by the decay constant. In this case, the sample has 8.31x10^17 atoms and a decay constant of 0.203/s. Multiplying these values gives a decay rate of approximately 1.69x10^17 Bq (becquerels), which represents the number of decays per second in the sample.

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The element calcium forms a cation with the charge +2. The symbol for this ion is \(Ca^{+2}\), and the name is calcium ion. The number of electrons in this ion is 18.

Calcium is present in the second column of the periodic table with symbol Ca.

The number of electrons in this element are 20.

The electronic configuration of calcium is [Ne] 3s² 3p⁶\(4s^{2}\) which shows that it has only two electron in its outermost shell.

Being an alkaline earth metal, calcium forms ions by the loss of two electron in the outermost shell.

Neutral calcium has 20 electrons, however, after the loss of two valence electrons it becomes a cation i.e. \(Ca^{+2}\)

Since its easy for calcium to lose two outermost electron instead of getting 6 more electrons to achieve octet state.

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The Dominican Republic rain forest is the location that has the best climate to promote chemical weathering.

Chemical weathering occurs when the minerals that compose rocks are altered through chemical reactions that happen when they come into contact with water and air. This process happens much faster in locations where the climate is hot and wet. This is because the combination of heat and water can break down the minerals in rocks more quickly than in colder, drier locations.

Locations such as the Dominican Republic rainforest, which are characterized by high temperatures and high humidity, are ideal for chemical weathering. This is because the combination of heat and moisture accelerates chemical reactions, which break down minerals in rocks. Hence, the Dominican Republic rainforest is the location that has the best climate to promote chemical weathering.

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The structure for 5-chloro-2-propyl-1-heptanol can be drawn by drawing a 7 carbon chain with (OH) functional group on C1, adding propyl group on C2 and  Cl on C5                                  

5-Chloro-2-propyl-1-heptanol is an organic compound that belongs to the class of alcohols.

The IUPAC name of the compound is 5-chloro-2-propylheptan-1-ol, which denotes the position of the hydroxyl group on the carbon chain. The prefix "heptan-" refers to the seven-carbon chain, and the suffix "-ol" denotes the presence of an alcohol functional group (-OH).

5-Chloro-2-propyl-1-heptanol is a colorless to pale yellow liquid with a strong odor. It is a primary alcohol. It is a versatile chemical intermediate that can be used to prepare a variety of other compounds, including pharmaceuticals, agrochemicals, and flavors. It is also used as a solvent and a reagent in organic synthesis

Thus, the structure for 5-chloro-2-propyl-1-heptanol can be drawn by drawing a 7 carbon chain with (OH) functional group on C1, adding propyl group on C2 and  Cl on C5  

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