Electric current flow is the result of the movement of ______. Select all that apply. a) anions b) cations c) electrons d) molecules.

Answer:

C im pretty sure. hope this helps

A formula unit of sodium hydrogen carbonate (NaHCO3) contains 27.25% sodium (Na). Percent by sodium mass is equal to (total sodium mass / formula weight) x 100.

(Total mass of the element in the formula / weight) * 100 calculates an element's percentage by mass and 143 grams of adipic acid (c6h10o4)

Step 1: NaHCO3 formula weight

Atomic weights of Na, H, C, and O

NaHCO3's chemical formula is Na+H+C+3O.

NaHCO3's formula weight is 22.9+1.01+12.01+3. (16)

NaHCO3 has a formula weight of 84.01 g.

Using the mass-percent formula in step two

(Total mass of sodium / formula weight) * 100 to calculate sodium percentage by mass.

% by mass of sodium is equal to (22.9)/84.01*100.

sodium mass as a percentage equals 27.25%

27.25% of a unit of sodium hydrogen carbonate (NaHCO3mass )'s is made up of sodium.

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Answer:

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, --That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness. Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn, that mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed. But when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new Guards for their future security.--Such has been the patient sufferance of these Colonies; and such is now the necessity which constrains them to alter their former Systems of Government. The history of the present King of Great Britain is a history of repeated injuries and usurpations, all having in direct object the establishment of an absolute Tyranny over these States. To prove this, let Facts be submitted to a candid world.

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, periodic table is the best platform to understand element.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.

Periodic table is the best platform to have a look to all elements at once that are arranged in columns and groups mentioning their valences, electronegativity and Ionisation energy symbols.

Therefore, periodic table is the best platform to understand element.

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To write a net ionic equation for an acid-base reaction, write the balanced molecular equation, followed by the complete ionic equation, and then identify the spectator ions. Eliminate the spectator ions to obtain the net ionic equation.

Acid-base reactions are a type of reaction in which an acid reacts with a base to form salt and water. Net ionic equations are used to show only the species that are involved in the chemical reaction, eliminating the spectator ions. The steps to write the net ionic equations for acid-base reactions are as follows:

Write the balanced molecular equation: The equation representing the reaction between the acid and base, written using the chemical formulas of the reactants and products.

Write the complete ionic equation: This equation shows the dissociation of the ionic compounds in the reaction into their constituent ions.

Identify the spectator ions: These are the ions that appear on both the reactant and product sides of the equation. Eliminate the spectator ions: Write the net ionic equation by removing the spectator ions from the complete ionic equation, leaving only the ions involved in the reaction.

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Answer:

yes

Explanation:

Two covalent bonds form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell.

E. The moles of oxygen gas remaining in the firing bomb after the combustion reaction is complete is 2.633 mol O2.

F. The mass of water in the entire container after the combustion reaction is complete is 10.4 kg

To calculate the moles of oxygen gas remaining in the firing bomb after the combustion reaction is complete, we first need to calculate the amount of oxygen gas consumed during the reaction. The balanced chemical equation for the combustion of lactic acid (s) is:

C3H6O3(s) + 4 O2(g) → 3 CO2(g) + 3 H2O(l)

From the balanced equation, we can see that each mole of lactic acid reacts with 4 moles of oxygen gas. Therefore, the number of moles of oxygen gas required for the combustion of 120.0 g of lactic acid is:

n(O2) = (4 mol O2/1 mol C3H6O3) x (120.0 g C3H6O3/90.08 g/mol C3H6O3) = 1.597 mol O2

Since there were 4.23 moles of oxygen gas initially present, the number of moles of oxygen gas remaining after the reaction is:

n(O2 remaining) = 4.23 mol O2 - 1.597 mol O2 = 2.633 mol O2

Therefore, the moles of oxygen gas remaining in the firing bomb after the combustion reaction is complete is 2.633 mol O2.

F. To calculate the mass of water in the entire container after the combustion reaction is complete, we need to consider the water in the calorimeter water jacket as well as the water produced by the combustion of lactic acid. The heat released by the combustion of lactic acid is absorbed by the water in the calorimeter, raising its temperature. The amount of heat absorbed by the water can be calculated using the following equation:

q = C × ΔT

where q is the heat absorbed (in joules), C is the heat capacity of the water (in J/(g·K)), and ΔT is the change in temperature (in K).

The heat absorbed by the water is equal to the heat released by the combustion of lactic acid, which can be calculated using the heat of combustion per gram of lactic acid:

ΔHc = -1364 kJ/mol (given)

The heat released by the combustion of 120.0 g of lactic acid is:

q = (ΔHc/mol) × (120.0 g/90.08 g/mol) = -1814 kJ

Note that the negative sign indicates that heat is being released by the system (the combustion of lactic acid).

Since all of the heat released by the combustion is absorbed by the water, we can equate the heat absorbed by the water to the heat released by the combustion:

Cwater × mwater × ΔT = -1814 kJ

where Cwater is the heat capacity of water, mwater is the mass of water in the calorimeter, and ΔT is the change in temperature of the water.

We know that the initial temperature of the water in the calorimeter is 15.0 °C and the peak temperature reached after the combustion reaction is 56.5 °C. Therefore, the change in temperature of the water is:

ΔT = 56.5 °C - 15.0 °C = 41.5 °C = 41.5 K

The heat capacity of water is 4.18 J/(g·K), so we can solve for the mass of water in the calorimeter:

mwater = -1814 kJ / (4.18 J/(g·K) × 41.5 K) = 10.4 kg

Therefore, the mass of water in the entire container after the combustion reaction is complete is 10.4 kg

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Answer:

42.5 amu

Explanation:

Using the ideal gas law equation;

PV = nRT

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

According to the information provided in this question;

mass = 1.9g

T = 27°C = 27 + 273 = 300K

P = 1.1atm

V = 1L

n = ?

PV = nRT

1.1 × 1 = n × 0.0821 × 300

1.1 = 24.63n

n = 1.1/24.63

n = 0.045mol

Mole = mass/molecular mass

0.045 = 1.9/M.M

M.M = 1.9/0.045

M.M = 42.54amu

Dalton says atoms of different factors differ in size and mass, while the cutting-edge theory says they range in common mass.

The subsequent postulates are proposed by John Dalton: All count number is manufactured from very tiny debris called atoms. Atoms are indivisible particles, which can't be created or destroyed in a chemical reaction. Atoms of a given detail are identical in mass and chemical houses.

The matter is made of indivisible debris referred to as atoms. The homes of all the atoms of a given detail are the same such as mass. this may additionally be said as all the atoms of detail have same mass at the same time as the atoms of various elements have exclusive loads.

This regulation explains that the sum of all partial pressures of gas in a combination should same as the barometric pressure. it is an especially essential calculation for oxygen to determine the pressure of gas pushing into the alveoli and consequently into the circulating blood.

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A cyclic diallylamine called 1-ethyl-3-methylcyclohexane is a feedstock used to create methicillin-resistant Staphylococcus aureus (MRSA).

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When meso-2,3-epoxybutane is treated with aqueous sodium hydroxide, two products are obtained. The first product is formed by the ring opening of the epoxide with the nucleophilic attack of OH- ion.

The resulting product is 2,3-butanediol with a hydroxyl group attached to each carbon atom. The stereochemistry of this product is meso as the two hydroxyl groups are on the same side of the molecule.

The second product is formed by the cleavage of the C-O bond of the epoxide. This leads to the formation of 2-butanone and ethylene glycol. The stereochemistry of this product is not relevant as it does not contain any chiral centers.

To summarize, when meso-2,3-epoxybutane is treated with aqueous sodium hydroxide, two products are obtained: 2,3-butanediol with meso stereochemistry and a mixture of 2-butanone and ethylene glycol.

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Hydrochloric acid can corrode some materials.Stainless steel is the best metal for the reaction container.

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The file that is temporarily stored on your computer is called a cache. As for the question about the synthesis of fluorescein, the conversion from the quinoid form to the lactone form can occur through a tautomerization process.

The mutation that results from a tautomeric shift ALWAYS converts a purine to a purine or a pyrimidine to a pyrimidine. A point mutation could result from a tautomeric shift in Computer.

Any change to the nucleotide sequence of an individual's genome is referred to as a mutation.

It is possible to characterize a tautomeric shift as a transient modification of the nucleotide base structure

The mechanism involves the transfer of a proton and rearrangement of electrons to form a zwitterionic tautomer, which can then undergo a cyclization reaction to form the yellow lactone tautomer. The quinoid tautomer, which is colorless, can also be converted to the brick red form through further oxidation.

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Answer:

A chemical reaction is a process where two different substances or elements are mixed together. They then undergo some sort of chemical change to become a different substance altogether.

Explanation:

Answer:

X

Explanation:

because it is the greatest

Carbondixoide gas is the type of greenhouse gas which is more difficult to control and eliminate.

Carbon dioxide is the greenhouse gas that is emitted through human activities which can be controlled by reducing human activities which is impossible for us because large number of products are produced from which carbondioxide gas is released.

So we can conclude that carbondixoide gas is the type of greenhouse gas which is more difficult to control and eliminate.

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Answer:

the top one is 100.000 and bottom one is 100.000

Explanation:

Answer:

temporary changes are the changes which are there only for a short period if time generally temporary changes are reversible permanent changes are the changes which remain to for longer time and are not reversible

Explanation:

hope it is helpful for

True. When acetic acid (CH3COOH) reacts with ammonia (NH3) in the presence of a suitable catalyst, such as concentrated sulfuric acid (H2SO4), the reaction leads to the formation of an amide compound. This process is known as amidation.

During the amidation reaction, the carboxylic acid group (-COOH) in acetic acid reacts with the amine group (-NH2) in ammonia to form an amide bond (-CONH2). The hydrogen atom from the -NH2 group combines with the oxygen atom from the -COOH group, resulting in the formation of water (H2O) as a byproduct. The chemical equation for this reaction can be represented as follows:

CH3COOH + NH3 → CH3CONH2 + H2O

The product of the reaction is acetamide (CH3CONH2), which is an amide compound. Amides are organic compounds that contain a carbonyl group (C=O) bonded to a nitrogen atom (-NH2). They have various applications in pharmaceuticals, polymers, and other chemical industries.

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Answer:

Number 6

Explanation:

A reflex action is an involuntary action and nearly instantaneous movement in response to a stimulus.

Answer:

2. Nerves helps to send impulses or information from one place to another and it also carries sensory and motor fibres and most however are mixed nerves carrying both sensory and motor fibres.

3.The brain has many functions and the brain has different regions that deals with different functions in the body.

6.Reflex actions are automatic responses to stimuli.They do not involve the conscious (voluntary) or higher centres of the brain and so are also known as involuntary actions.

10.Loop of Henle,Bowman's Capsule, Glomerulus, Proximal Capsule.

13.Urter is part of the reproductive organ in an human being.

14.We should drink enough water and we should not store our urine,we should always empty our bowels when we feel like using the toilet.

15.Water is good for urinary system because it help for easy digestion and for easy work in the system.

12.The urine is stored in the bladder.

11.Kidneys remove nitrogenous wastes and also control the amount of water,salts and acids - the osmoregulatory function.

5.Nerves that carries the sensory fibre and nerves that carries the motor fibre.

1. Brain and the spinal cord or the central nervous system and the peripheral nervous system.

4.They carry informations from one part of the body to another and they also help in the coordination of the body.....

I think some of the answers are correct...Thank you for the questions.....

Answer: Thus 9.75 moles of iron will be required.

Explanation:

The balanced chemical reaction is:

\(2Fe+3O_2\rightarrow 2Fe_2O_3\)  

According to stoichiometry :

2 moles of \(Fe_2O_3\) are produced by= 2 moles of \(Fe\)

Thus 9.75 moles of \(Fe_2O_3\) are produced by=\(\frac{2}{2}\times 9.75=9.75moles\)  of \(Fe\)

Thus 9.75 moles of iron will be required.

Answer:

Elements in the same period have the same number of electron shells; when you travel through a period (and hence from group to group), you add electrons and protons, and your element becomes less metallic. The periodic repetition of identical qualities as the atomic number increases is reflected in this arrangement.

Explanation:

The molecule or compound that contains a pure covalent bond is which molecule or compound below contains a pure covalent bond C₂H₄.

To determine which molecule or compound below contains a pure covalent bond, we need to examine the different options: AgBr, NCl₃, LiF, C₂H₄, and ZnS.

A pure covalent bond is formed when two atoms share electrons equally, usually found between atoms with similar electronegativity values. In this case, the molecule that contains a pure covalent bond is C₂H₄.

C₂H₄, also known as ethylene, is an organic compound where two carbon atoms (C) are bonded with each other and each is connected to two hydrogen atoms (H) through covalent bonds. These bonds are formed due to the equal sharing of electrons between the carbon and hydrogen atoms, making it a molecule with pure covalent bonds.

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There are D) 9.51E23

Given

1.58 moles of LiOH

Required

The number of formula units

Solution

The mole is the number of particles(molecules, atoms, ions, formula units) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

So for 1.58 moles :

= 1.58 x 6.02 x 10²³

= 9.5116 x 10²³

Answer:

radio and sound

Explanation:

Because they are waves in motion

Answer:

1, 2, 2, 1

Explanation:

(i) The initial-boundary value problem for the given scenarios are as follows:

a) Scenario a:

PDE: ∂u/∂t = k * ∂²u/∂x²

Initial condition: u(x, 0) = 100 (boiling water temperature)

Boundary conditions: u(0, t) = 10, u(L, t) = 10 (constant temperature at the ends)

b) Scenario b:

PDE: ∂u/∂t = k * ∂²u/∂x²

Initial condition: u(x, 0) = 100 (boiling water temperature)

Boundary conditions: u(0, t) = 0 (temperature at x=0), ∂u/∂x(L, t) = 0 (thermal insulation at x=L)

(iii) The solution for the temperature distribution as time approaches infinity can be found by solving the appropriate steady state equation.

(i) The initial-boundary value problem formulation states the partial differential equation (PDE) governing the temperature distribution in the aluminum bar, along with the initial condition and boundary conditions.

In scenario (a), both ends of the bar are immersed in a medium with a constant temperature of 10 degrees Celsius, while in scenario (b), the end at x=0 is immersed in a medium with temperature 0 degrees Celsius and the end at x=L is insulated.

(ii) As time approaches infinity, the temperature distribution in the bar tends to reach a steady state.

In scenario (a), the temperature throughout the bar will eventually approach a constant value of 10 degrees Celsius, since both ends are immersed in a medium with that temperature.

In scenario (b), the temperature at x=0 will approach 0 degrees Celsius, while the temperature at x=L will remain constant due to thermal insulation.

(iii) To find the solution as time approaches infinity, we need to solve the appropriate steady state equation.

In scenario (a), the steady state equation is ∂²u/∂x² = 0, which implies that the temperature gradient is zero throughout the bar, resulting in a constant temperature of 10 degrees Celsius.

In scenario (b), the steady state equation is ∂²u/∂x² = 0 with the boundary condition u(0) = 0, which implies a linear temperature distribution from 0 degrees Celsius at x=0 to a constant temperature at x=L due to insulation.

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pH = -log[H3O+] = -log(8.26 x 10^-5) = 4.083 (three decimal places because the concentration had three sig figs)