A sunflower turns toward the sun to absorb the greatest amount of energy. What type
of behavior is this?
A Dormancy
B Phototropism
C Hibernation
D Gravitropism

The electron configuration of aluminum is 1s2 2s2 2p6 3s2 3p1.

Explanation:

which graph, please theres no graph

The chemical equation for solid zinc hydrogen carbonate decomposing to yield solid zinc carbonate, water, and carbon dioxide gas can be represented as: Zn(HCO3)2(s) → ZnCO3(s) + CO2(g) + H2O(l)

In this reaction, the solid zinc hydrogen carbonate decomposes into solid zinc carbonate, carbon dioxide gas, and water. Zinc hydrogen carbonate is an unstable compound that breaks down into its constituent compounds upon heating. The decomposition of zinc hydrogen carbonate produces carbon dioxide gas, which is released into the atmosphere, and water, which remains as a liquid. Solid zinc carbonate is also produced as a byproduct of the reaction.

Overall, this reaction involves the breakdown of a solid carbonate compound into simpler compounds, releasing carbon dioxide gas in the process. The chemical equation provides a useful way to represent this reaction, allowing us to predict the products of the reaction and understand the chemical changes that occur.

To learn more about chemical equation visit;

https://brainly.com/question/30087623

#SPJ11

The mass percent of acetic acid in vinegar can be calculated by dividing the mass of acetic acid by the total mass of the vinegar solution and multiplying by 100.

To calculate the mass percent of acetic acid in vinegar, you need to determine the mass of acetic acid and the total mass of the vinegar solution. Here are the steps to follow:

1. Obtain the molar mass of acetic acid (CH3COOH), which is approximately 60.05 g/mol.

2. Measure the mass of vinegar used in the calculation.

3. Prepare a known volume of vinegar solution and record the mass of the solution using an analytical balance.

4. Determine the mass of acetic acid in the solution by subtracting the mass of the empty container from the mass of the container with the vinegar solution.

5. Calculate the mass percent of acetic acid by dividing the mass of acetic acid by the total mass of the vinegar solution and multiplying by 100:

  Mass percent of acetic acid = (mass of acetic acid / total mass of vinegar solution) x 100

The resulting value will give you the mass percent of acetic acid in the vinegar solution. It represents the percentage of acetic acid by mass in the total solution.

To know more about "Acetic acid" refer here:

https://brainly.com/question/31810881#

#SPJ11

Answer:

Explanation:

The mass of the car can be found by using the formula

\(m = \frac{f}{a} \\ \)

f is the force

a is the acceleration

From the question we have

\(m = \frac{2000}{2.5} \\ \)

We have the final answer as

Hope this helps you

Answer:

Proton: A positively charged particle found in the nucleus of an atom. A proton contributes one atomic mass unit to the total atomic weight of an atom.

Explanation:

Answer:

A proton

Explanation:

A proton is a positive charge found in an atom

Answer:

As the wax starts to melt and puddle around the candle’s cotton wick, it actually travels upward. The wick soaks it up, and it eventually evaporates into the air as either carbon dioxide or water vapor after it burns.

Explanation:

The elements would most likely attain a noble-gas configuration of He, Ne, Ar, or Kr. The appropriate elements for their respective bins are Se would gain two electrons to attain a noble-gas configuration of Kr. Sr would lose two electrons to attain a noble-gas configuration of Kr.

Noble gases are the most stable elements because their outermost electron shells are fully occupied, which is what the other elements aim to achieve. Noble gas configuration is the electron configuration of noble gases, which are the most stable elements. The electron configuration of the nearest noble gas is achieved by adding or removing electrons from the atom. Each of the seven periods in the periodic table corresponds to a specific block of the periodic table. The 1s block is called the first period, the 2s2p block is the second period, and so on.

The elements Li, Al, O, P, K, Se, and Sr belong to different blocks of the periodic table, so they each have different electron configurations.

The electron configurations of Li, Al, O, P, K, Se, and Sr are 1s2 2s1, [Ne] 3s2 3p1, [He] 2s2 2p4, [Ne] 3s2 3p3, [Ar] 4s1, [Ar] 3d10 4s2 4p4, and [Kr] 5s2, respectively.

To achieve a noble-gas configuration, these elements would lose or gain electrons as follows: Li would lose one electron to attain a noble-gas configuration of He. Al would lose three electrons to attain a noble-gas configuration of Ne. O would gain two electrons to attain a noble-gas configuration of Ne.

P would gain three electrons to attain a noble-gas configuration of Ar. K would lose one electron to attain a noble-gas configuration of Kr.

Se would gain two electrons to attain a noble-gas configuration of Kr. Sr would lose two electrons to attain a noble-gas configuration of Kr.

To know more about noble-gas configuration visit:

https://brainly.com/question/13933772

#SPJ11

Answer:

go for it

Explanation:

Answer:

I would be happy to help

Explanation:

Answer:

12 = Lead

13 = red

Explanation:

12:

Given data:

Mass of metal = 143 g

Volume of metal = 12.6 cm³

Identity of metal = ?

Solution:

To check which metal is this we will calculate the density.

Formula:

d =  m/v

d = 143 g/ 12.6 cm³

d = 11.3 g/cm³

The metal is lead.

13:

First of all we will calculate the densities of all liquid. The liquid with the highest density will form the bottom layer.

Blue:

d = m/v

d = 12 g/100 mL

d = 0.12 g/mL

Clear:

d = 10 g/ 100 mL

d = 0.1 g/mL

Red:

d = m/v

d = 15 g/100 mL

d = 0.15 g/mL

Yellow:

d = m/v

d = 13 g/ 100 mL

d = 0.13 g/mL

The density of red liquid is highest from all thus it will form bottom layer.

To determine the number of molecules of water of crystallization in the hydrated sodium carbonate and write its correct formula, we can use the given information and perform a calculation.

First, let's calculate the number of moles of nitric acid used in the titration:

Volume of nitric acid used = 28.75 cm³

Concentration of nitric acid = 1.6800 M

Number of moles of nitric acid = concentration × volume

= 1.6800 M × 0.02875 L

= 0.04824 moles

Since the reaction between nitric acid and hydrated sodium carbonate is 1:1, the moles of nitric acid used are equal to the moles of hydrated sodium carbonate.

Now, let's calculate the number of moles of hydrated sodium carbonate:

Mass of hydrated sodium carbonate used = 138.14 g

Molar mass of hydrated sodium carbonate = 105.99 g/mol (\(Na_2CO_3\))

Volume of solution prepared = 600.00 cm³ = 0.6 L

Number of moles of hydrated sodium carbonate = mass / molar mass

= 138.14 g / 105.99 g/mol

= 1.302 moles

Since the moles of nitric acid and hydrated sodium carbonate are equal, we can determine the number of water molecules of crystallization in the hydrated sodium carbonate.

The molar ratio between hydrated sodium carbonate and water can be found from the balanced chemical equation. Let's assume the formula of hydrated sodium carbonate is \(Na_2CO_3\) · x\(H_2O.\)

From the balanced equation:

1 mole of\(Na_2CO_3\) · x\(H_2O.\) reacts with x moles of water.

Therefore, in this case:

1.302 moles of \(Na_2CO_3\) · x\(H_2O.\) reacts with x moles of water.

Since the number of moles of water is equal to the number of moles of hydrated sodium carbonate, we can conclude that the correct formula for the hydrated sodium carbonate is \(Na_2CO_3\) ·\(1.302 H_2O.\)

So, the number of water molecules of crystallization in the hydrated sodium carbonate is 1.302.

Know more about crystallization    here:

https://brainly.com/question/30670227

#SPJ8

The basic differences between the collision theory and the transition state theory are-

The factors that affect the rate of a chemical reaction:

To learn more about this topic,

https://brainly.com/question/16979430

https://brainly.com/question/16416932

You would need roughly 202 ml of water to dissolve 72 grams of salt at 25 degrees Celsius.

The solubility of the compound, salt in water at 25 degrees Celsius is stated to be 357 grams per liter (g/L).

Then we can say that 357 grams of salt can be dissolved in 1 liter (1000 milliliters) of water.

To find out how much water you need to dissolve 72 grams of salt, solve the ratio as

357 g : 1000 mL = 72 g : x mL

Solving for x gives:

x = (72 g × 1000 mL) / 357 g

x = 201.681 mL

If we approximate this value it becomes 202ml

Find more exercises on dissolving compound;

https://brainly.com/question/22824409

#SPJ1

Answer: skeleton equation

Explanation:

The amount of Ca is not limiting, we have : 2.87g of O\(_{2}\) will produce : 2.87 / 56.1 = 0,051158645 mol of CaO

What is Mass?

Mass is a property that represents the amount of matter in a sample. Mass is often expressed in grams (g) and kilograms (kg) (kg). Mass can alternatively be defined as the property of matter that provides it the ability to resist acceleration. The more mass an object has, the more difficult it is to accelerate.

To learn more about Mass

https://brainly.com/question/6060141

#SPJ4

The balanced equation for the combustion of ethane, C2H6, is: C2H6 + 3O2 → 2CO2 + 3H2OTo determine how much heat is produced if 7.0 moles of ethane undergo complete combustion, we need to use the balanced equation and the standard enthalpies of formation of the reactants and products.

The standard enthalpy of formation of a compound is the enthalpy change when one mole of the compound is formed from its constituent elements, with all reactants and products in their standard states (usually at 1 atm and 25°C).The standard enthalpies of formation of the reactants and products in the combustion of ethane are:

ΔHf°(C2H6) = -84.68 kJ/mol

ΔHf°(O2) = 0 kJ/mol

ΔHf°(CO2) = -393.51 kJ/mol

ΔHf°(H2O) = -285.83 kJ/mol

Now we can calculate the heat produced by using the difference between the enthalpies of the products and reactants:

2CO2 + 3H2O - (C2H6 + 3O2)

ΔH = 2(-393.51 kJ/mol) + 3(-285.83 kJ/mol) - (-84.68 kJ/mol + 3(0 kJ/mol))

ΔH = -1560.78 kJ/mol

Therefore, if 7.0 moles of ethane undergo complete combustion, the amount of heat produced will be:

-1560.78 kJ/mol x 7.0 mol

= -10,925.46 kJ or -10,925,460 J.

Note that the negative sign indicates that heat is released by the reaction, which is exothermic.

To know more about exothermic visit

https://brainly.com/question/4345448

#SPJ11

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


To learn more about molarity click here: brainly.com/question/31545539

#SPJ11

The correct steps in order from first to last for confirming the presence of lead(ii) ions in a sample is i, iv, ii, vi, viii, iii, vi, v.

The chemical element of lead ion has the atomic number 82 and the letter Pb. It is a hefty metal with a higher density than the majority of everyday materials. Its melting point is rather low, and lead is soft and flexible. lead ion is a lustrous, slightly blue-tinged grey when it is first cut. A sample is a representative piece or one object taken from a bigger whole or group, especially when it is offered for inspection or displayed as proof of quality: specimen. A sample is a selection of individuals, things, or things used in study that is used for measurement out of a wider population. In order to be able to extrapolate the results from the research sample to the entire population, the sample must be representative of the population.

the complete question is:

place the steps in order from first to last for confirming the presence of lead(ii) ions in a sample.

i) The formation of a white and black precipitate confirms the presence of lead(II).

ii) Decant the liquid above the white precipitate and add hot water to the white precipitate.

iii) Decant the liquid and add K, CrO, to the liquid.

iv) Add HCI to the sample.

v) The formation of a yellow precipitate confirms the presence of lead(II).

vi) Decant the liquid and add HNO, to the liquid.

vi) Decant the liquid and add NH, to the white precipitate.

viii) The formation of a white solid confirms the presence of lead(II).

learn more about lead ion here

https://brainly.com/question/1782326

#SPJ4

Answer:

The energy required to start a reaction is Activation energy.

The energy levels in which electrons orbit around the nucleus are also called electron shells.

All atoms contain electrons, protons and neutrons. The protons and neutrons are located in the center of the atom called the nucleus. Electrons orbit around the nucleus in electron orbits or shells.

Electron shells or energy levels are the paths followed by electrons as they orbit round the nucleus. The shells are used to determine an atom's electronic configuration and atomic structure.

The shells in an atom are given a number, starting from the innermost shell to the outermost shell, called the principal quantum number, denoted with the letter n. The farther away a shell is from the nucleus, the higher the energy level and the higher the principal quantum number.

Learn more about atoms here:

https://brainly.com/question/12904555

#SPJ4

Answer:

C

Explanation:

because 37 does not end with 5 or 0, so it'd be harder to see if the water temperature is accurate if your thermometer goes up by 5s or 10s. And using D, the one that goes up by 20s is out of the question, it'd be too difficult to read. Using a thermometer that goes up by 1s is just best because you can be positive when the water is at 37°C

Human devices use potential energy to store energy, whereas kinetic energy is potential energy in motion. Both types of energies can be measured in Joules (J).

Human devices generate and use different sources of energy, which can be classified into renewable sources (e.g., solar, hydraulic, winds, etc) and non-renewable sources (e.g., nuclear energy) of energy.

For example, a hydroelectric power plant transforms the potential energy stored in water reservoirs (e.g., a lake) into mechanical energy (a type of kinetic energy) when this energy is released from the water reservoir and flows through a turbine.

Subsequently, this type of kinetic energy is then used to generate electricity.

On the other hand, a nuclear power plant uses the potential energy that is stored within the nuclei of atoms to produce kinetic energy by a process known as nuclear fission.

This process (nuclear fission) releases energy in the form of heat (i.e., thermal energy).

Subsequently, this type of kinetic energy (heat) is used to generate steam, which then moves turbines to generate mechanical energy and finally generates electricity.

Learn more in:

https://brainly.com/question/4038933

Answer:

We will have zero bonds

Explanation:

In this case, we have to start with the structure of 4,5-diethyloctane. This name ends with the suffix "ane" therefore we have an alkane. All the alkanes are made with single bonds between carbons and single bonds between carbon and hydrogen.

The molecule will have a carbon chain of eight carbons and we will have 2 branches, one ethyl on carbon 4 and another ethyl on carbon 5. (see figure 1)

Answer:

Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).

The name of the Group 17 elements is called halogens

The group 17 elements are very reactive elements. Members of this group include:

The group 17 element are known to produce salts as they react with metals. Hence, they are called halogens

The group 17 elements are have 7 valence electrons and they required one electron to attain the stable octet configuration of the noble gas family.

From the above, we can see that the name of group 17 elements is halogens

Learn more about group 17 elements:

https://brainly.com/question/28295393

#SPJ6

The balanced ionic equation for the reaction when aqueous manganese(ii) chloride and aqueous ammonium carbonate are mixed in solution to form solid manganese(ii) carbonate and aqueous ammonium chloride is: H₂O (l) + 2CO₃²⁻ (aq) + 2Mn²⁺ (aq) → 2MnCO₃ (s) + 2H⁺ (aq)

Manganese(II) chloride is a chemical compound that is a white to pale pink color, odorless, and non-combustible. Manganese is a transition element that has a lot of oxidation states. Its compounds are generally found in the +2, +3, +4, +6, and +7 oxidation states.

Aqueous ammonium chloride is produced from the ammonium carbonate solution, which reacts with the manganese(II) chloride solution in a double-displacement reaction.

MnCl₂ (aq) + (NH₄)₂CO₃ (aq) → MnCO₃ (s) + 2NH₄Cl (aq)

The balanced net ionic equation for the reaction when aqueous manganese(II) chloride and aqueous ammonium carbonate are mixed in solution to form solid manganese(II) carbonate and aqueous ammonium chloride is given below.

Mn²⁺ (aq) + CO₃²⁻ (aq) → MnCO₃ (s)

H₂O (l) + 2CO₃²⁻ (aq) + 2Mn²⁺ (aq) → 2MnCO₃ (s) + 2H⁺ (aq)

A double replacement reaction occurs when an insoluble compound is formed by the reaction of two ionic compounds. Aqueous manganese(II) chloride reacts with aqueous ammonium carbonate to produce solid manganese(II) carbonate and aqueous ammonium chloride.

To know more about an ionic equation, refer here:

https://brainly.com/question/15466794#

#SPJ11

The values of a₀ and a can be determined using the least square procedure with the given experimental data.

We have the model equation f(x) = a₀x^(a-1).

Let's denote the given experimental data as X and f(x):

X: 0.50   1.0    1.50   2      2.50

f(x): 0.25 0.5    0.75  1      1.25

To solve for a₀ and a, we can set up a system of equations based on the least square method:

Sum of Residuals = Σ [f(x) - a₀x^(a-1)]^2 = 0

Expanding the sum of residuals:

Residual₁ = (0.25 - a₀ * 0.50^(a-1))^2

Residual₂ = (0.5 - a₀ * 1.0^(a-1))^2

Residual₃ = (0.75 - a₀ * 1.50^(a-1))^2

Residual₄ = (1 - a₀ * 2^(a-1))^2

Residual₅ = (1.25 - a₀ * 2.50^(a-1))^2

Our objective is to minimize the sum of residuals by finding the optimal values of a₀ and a. This can be achieved by taking the partial derivatives of the sum of residuals with respect to a₀ and a, setting them equal to zero, and solving the resulting equations.

However, this system of equations does not have a closed-form solution. To find the optimal values of a₀ and a, we can utilize numerical optimization techniques or approximation methods such as gradient descent.

To determine the values of a₀ and a for the given model equation f(x) = a₀x^(a-1) using the least square procedure, we need to solve the system of equations formed by the sum of residuals. Since the equations do not have a closed-form solution, numerical optimization techniques or approximation methods are required to find the optimal values of a₀ and a.

To know more about least square procedure, visit

https://brainly.com/question/30548323

#SPJ11

Answer:

The heat required to boil water is called the heat of vaporization, and it is the amount of energy required to change the state of a substance from a liquid to a gas at a constant temperature. The heat of vaporization for water is approximately 40.7 kJ/mol or 2257 J/gram.

To calculate the heat required to boil 50.0 grams of water, you would multiply the heat of vaporization (2257 J/g) by the number of grams of water:

Heat (J) = 2257 J/g x 50 g

Heat (J) = 112,850 J

To convert Joules to kilojoules (kJ), divide by 1000.

Heat (kJ) = 112,850 J / 1000 = 112.85 kJ

Therefore, it takes 112.85 kJ of heat to boil 50.0 grams of water.

The enthalpy change for the formation of lead chloride by the reaction of lead chloride with chlorine is -11.6 kJ/mol.

It can be calculated by using Hess's Law. We can break down the overall reaction into two steps: the first is the dissociation of lead chloride into lead ions and chloride ions, and the second is the reaction of chlorine with the chloride ions to form lead chloride.

The enthalpy change for the first step, the dissociation of lead chloride, is given as ΔH = +92.8 kJ/mol. The enthalpy change for the second step, the reaction of chlorine with the chloride ions, is given as ΔH = -104.4 kJ/mol.
To calculate the enthalpy change for the overall reaction, we add the enthalpy changes for the two steps:
ΔH = ΔH1 + ΔH2
ΔH = (+92.8 kJ/mol) + (-104.4 kJ/mol)
ΔH = -11.6 kJ/mol

Therefore, by using formula of the enthalpy change, the result for the formation of lead chloride is -11.6 kJ/mol.

To know more about the enthalpy change refer here :

https://brainly.com/question/29556033#

#SPJ11

Answer:

C

Explanation:

The student is incorrect.

The atmosphere weighs very little compared to the material the earth is made of. Gravity is effected by mass. The more mass, the more gravity. The only correct (and it is totally correct) answer is C