Write and balance the following equations

the reaction between one methane molecule (CH4) and two diatomic oxygen molecules (O2) to produce one carbon dioxide molecule (CO2) and two water molecules (H2O).

ASAP PLEASE

Answer:

C.) No, because the Moon reflects most of the Sun's light rather than

absorbing it

Explanation:

:p

Answer:

The answer is 22 degrees celsius. which is D.

Explanation:

Hot:84-99 F (29-37.5 C) Warm:70-84 F (21-29 C) Cool:55-69 F (13-21 C) Cold: Below 55 F (Below 13 C)

Answer: 22

Explanation: UsaTestPrep

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.

The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.

This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.

Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

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Answer:

e) ⁵²Cr

Explanation:

The general form of alpha decay is as follows:

\(\boxed{ ^A_ZX \ \ \rightarrow \ \ ^{A - 4} _{Z - 2} \ Y \ \ + \ \ ^4_2 \alpha}\).

From this, we can see that during alpha decay, the mass number decreases by 4 and the atomic number decreases by 2.

Therefore, we need to find a nucleus that has 4 more nucleons (i.e., a mass number that is 4 more) than that of Ti-48, which is 48 + 4 = 52.

The only option with a nuclear number of 52  is ⁵²Cr, and therefore, Ti-48 is produced by the alpha decay of ⁵²Cr.

The mean of the data set is approximately 4.0626, and the 90% confidence interval is [4.060925, 4.064275].

The sample mean (x) is calculated as follows:

x = (4.0620 + 4.0550 + 4.0650 + 4.0740 + 4.0550 + 4.0660) / 6

x ≈ 4.0626 (rounded to four decimal places)

The 90% confidence interval is calculated as follows;

Standard deviation (s):

(4.0620 - 4.0626)² = 0.00000036

(4.0550 - 4.0626)² = 0.00000576

(4.0650 - 4.0626)² = 0.00000006

(4.0740 - 4.0626)² = 0.00001328

(4.0550 - 4.0626)² = 0.00000576

(4.0660 - 4.0626)² = 0.00000012

average of the squared differences:

(0.00000036 + 0.00000576 + 0.00000006 + 0.00001328 + 0.00000576 + 0.00000012) / 6 ≈ 0.00000624

s = √(0.00000624)

s ≈ 0.002496

the standard error of the mean (SEM):

SEM = 0.002496 / √6

SEM ≈ 0.001018

For a 90% confidence interval, the z value is approximately 1.645.

ME = 1.645 * 0.001018 ≈ 0.001675

CI = x ± ME

CI = 4.0626 ± 0.001675

CI ≈ [4.060925, 4.064275]

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Answer:

D. Dissolving of rock due to acid rain.

1) The pH is 2.5

2) The pH is 11.5

3) The initial concentration is\(2.1 * 10^-14\)M

pH is a measure of the acidity or basicity of a solution. It is defined as the negative logarithm of the concentration of hydrogen ions in the solution.

1) The pH of the solution can be gotten from;

K = \(x^2\)/0.65 - x

\(1.754 * 10^-5\)(0.65 - x) =  \(x^2\)

\(1.14 * 10^-5 - 1.754 * 10^-5x = x^2\\x^2 + 1.754 * 10^-5x - 1.14 * 10^-5 = 0\)

x = 0.003 M

pH = -log(0.003)

= 2.5

2) Kb = \(x^2\)/0.35 - x

\(1.8 * 10^-5 (0.35 - x) = x^2\\6.3 * 10^-6 - 1.8 * 10^-5x = x^2\\x^2 + 1.8 * 10^-5x - 6.3 * 10^-6 = 0\)

x = 0.003 M

pOH = -log (0.003)

= 2.5

pH = 14 - 2.5 = 11.5

3) Hydrogen ion concentration = Antilog (-11.5)

= 3.2 * 10^-12 M

\(4.9 * 10^-10 = ( 3.2 * 10^-12)^2/x \\4.9 * 10^-10x = ( 3.2 * 10^-12)^2\\x = ( 3.2 * 10^-12)^2/4.9 * 10^-10\\x = 2.1 * 10^-14 M\)

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Answer:

c

Explanation:

The current level of health, goals, and diet need to be taken into consideration while planning an exercise program.

Exercise programs should include some specific exercises to improve cardiovascular health, such as swimming, jogging, rowing, elliptical exercises, and biking.

To assess your current fitness level use or make an appointment with an exercise professional for a fitness assessment. Consulting an exercise professional when designing a fitness program can help you reduce injury and customize a program to your needs. The adult pre-exercise screening tool consists of exercise guidelines.

Consider your goals and think about likes and dislikes. Plan a logical progression of activity and build activity into a daily routine. If you begin to lose motivation then set new goals or try a new physical activity.

Give time for recovery after exercising and make sure to have an adequate healthy diet and assemble exercise clothing.

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An average brightness was calculated for each length of graphite tested to get a better understanding of the relationship between the length of the graphite and the brightness of the line it produced.

Graphite has many uses in various industries. Some of its uses include: Pencils, Lubricants, Refractories, Batteries, Electrodes, Nuclear reactors, Aerospace industry.

By calculating the average, it is possible to see if there is a trend in the data and if longer or shorter lengths of graphite produce brighter or duller lines. This information can be useful in determining the best length of graphite to use for a particular task or project.

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Answer:

the reactor was overheating

Answer:

D . GOD BLESS .

Explanation:

Answer:

The answer is

To find the number of atoms of sodium we use the formula

N = n × L

where

n is the number of moles

N is the number of entities

L is Avogadro's constant which is

\(6.02 \times {10}^{23} \)

We need to find the number of moles first

The formula is

\(n = \frac{m}{M} \)

where

M is the molar mass

m is the mass

n is the number of moles

From the question

M = 22.9 g/mol

m = 51.0 g

\(n = \frac{51}{22.9} \)

n = 2.227 moles

So the number of sodium atoms is

\(N = 2.227 \times 6.02 \times {10}^{23} \)

We have the final answer as

Hope this helps you

It is pseudoscience because each metal is known to be a unique element alchemy is a science or pseudoscience.

Matter is anything that occupies space and has mass; in other respects, matter is the "thing" that the cosmos is made of. The fundamental constituents of all stuff are called elements. These are not changed into other elements by conventional chemical processes and have distinct chemical and physical properties.

Matter can be solid, liquid, or gaseous on Earth. Solid particles, fluids, and gases are supported by the exceptionally small building components known as atoms and molecules. A solid's component particles are attracted to one another strongly. They are close to one another and vibrate en position without passing each other.

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The complete question is -

Alchemy is a branch of ancient knowledge that states that all matter is composed of air, fire, earth. Which of these best explains whether alchemy is a science or pseudoscience?

A-It is a science because all matter is known to be made of elements.

B-It is a science because air, fire, earth, and water all are forms of matter.

C-It is pseudoscience because all matter is known to be made of atoms.

D-It is pseudoscience because ancient knowledge is mystical yet reliable.

E-It is pseudoscience because each metal is known to be a unique element.

Answer:

I guess you just answered a lot of questions

Explanation:

Thanks for the points btw :)

Answer:

Congatulations I am never gonna make it up there OMEGALUL

Explanation:

ANSWER

STEP-BY-STEP EXPLANATION:

You are given the below expression from the question provided

Answer:

Electrolyte and Nonelectrolyte Solutions

Explanation:

Answer: 3.44%

Explanation: try it for math

Answer:

D

Explanation:

The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.

Orbital notation is a way of representing the electronic configuration of an atom, which describes the arrangement of electrons in its various energy levels or orbitals.

In this notation, each orbital is represented by a box or circle, and the electrons are represented by up or down arrows, which indicate their spin. The number and arrangement of boxes and arrows in the notation follow the rules of the Aufbau principle, the Pauli exclusion principle, and Hund's rule.

The Aufbau principle tells that electrons fill the least energy orbitals before filling higher energy orbitals. The first shell of an atom contains one s orbital, which can hold up to two electrons. The s orbital is represented by a single box or circle, and each electron is represented by an up or down arrow.

The electronic configuration for potassium (K) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹. In orbital notation, this would be represented as 1s: up arrow, down arrow; 2s: up arrow, down arrow; 2p: up arrow, up arrow, up arrow; 3s: up arrow, down arrow; 3p: up arrow, up arrow, up arrow; 4s: up arrow.

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Answer:

vapour and I like

Explanation:

Mark brainliest

The bottle collapse when sitting on the counter as a result of the Pressure atmosphere > pressure of gas in bottle.

This is defined as the force exerted on an object per unit area.

Pressure= Force/Area.

Pressure of the atmosphere exerts a greater force on the walls of the bottle thereby leading to a collapse as a result of the pressure of air in it being lesser.

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Answer:

The value is \(J = 1.71 *10^{-6} \ kmol/m^2\cdot s \)

Explanation:

From the question we are told that

The length the tube is \(l = 0.20 \ m\)

The diameter of the tube is \(d = 0.01 \ m\)

The total pressure inside the tube is \(P = 101.32\ kPa = 101.32 *10^{3} \ Pa\)

The partial pressure of CO2 at the first end is \(P_1 = 456 \ mmHg = 456 *133.322 = 60794.832 \ Pa\)

The partial pressure of CO2 at the other end is \(P_2 = 76 \ mmHg = 76 *133 = 10132.472 \ Pa\)

The temperature is T = 298 K

The diffusion coefficient is \(D_{1,2} = 1.67 * 10^{-5} \ m^2 /s\)

Generally the molar flux of CO2 is mathematically represented as

\(J = \frac{D_{1,2} * [P_1 -P_2]}{R* T[l]}\)

Here R is the gas constant with value \(R = 8.314 \ J/k mol\)

So

\(J = \frac{ 1.67 * 10^{-5} * [60794.832 -10132.472 ]}{8.314 * 298 [0.20]}\)

\(J = 1.71 *10^{-3} \ mol/m^2\cdot s \)

Converting to kmol

        \(J = \frac{1.71 *10^{-3}}{1000}  \)

        \(J = 1.71 *10^{-6} \ kmol/m^2\cdot s \)

In an ideal case, the acid would completely protonate. such an acid would be a strong acid.  Dissociation of Formic acid looks like:

HCOOH + H₂O → COOH⁻ + H₃O⁺

one mole of formic acid should give one mole of Hydronium(H₃O⁺) ions

similarly, 0.1 moles of formic acid should produce 0.1 moles of hydronium ions. but we know that it is not the case, a much lesser amount is actually formed.

Which means that Formic acid did not completely dissociate into COOH⁻ and H⁺ ions.

Hence, Formic Acid is a weak acid

We know

Any acid

Formic acid stands for HCOOH

It contains C means dissociation is less .

The dissociation of H+ is less means acidity is less.

Answer:

e. None of these

Explanation:

The oxide of Bromine (BrₐOₓ) produce "a" moles of Br that are equal to "a" moles of AgBr. The moles of AgBr are:

Moles AgBr:

3.188g AgBr * (1mol / 187.78g) = 0.01698 moles of AgBr = Moles of Br

These moles of Br weighs (Molar mass: 79.9g/mol):

0.01698 moles of Br * (79.9g / mol) = 1.36g of Br

Mass of Oxygen must be:

1.90g - 1.36g Br = 0.54g oxygen. In moles:

0.54g O * (1mol / 16g) = 0.03375 moles of O

Empirical formula is the simplest ratio of atoms in the molecule. Dividing in the moles of Br:

Br:  0.01698 moles of Br / 0.01698 moles = 1

O: 0.03375 moles of O / 0.01698 moles = 1.99 ≅ 2

That means empirical formula is:

BrO₂

And right option is:

The empirical formula of the oxide would be \(BrO_2\)

1.90 g of the oxide of bromine produces 3.188 g of AgBr

moles of 3.188 g AgBr = 3.188/187.78

                                        = 0.017 moles

AgBr ---> Ag+ + Br-

Thus, mole of Br in AgBr = 0.017 moles

Mass of 0.017 Br = mole x molar mass

                           = 0.017 x 79.904

                              = 1.357 g

Mass of oxygen in the oxide of bromine = 1.90 - 1.357

                                                                    = 0.543 g

mole of 0.543 oxygen = 0.543/16

                                       = 0.0339 moles

mole of 1.357 g Br = 0.017

Dividing by the smallest:

Br = 0.017/0.017 = 1

O = 0.0339/0.017 = 1.99

Empirical formula = BrO2

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Answer:1. metyletevinyl

4. (Z)-3-hydroxypropenal

Explanation:

Answer:c

Explanation:Gii

14.92 grams of hydrochloric acid are needed to react with 20.0 grams of iron (II) sulfide ore containing 10.0% inert material.

The balanced chemical equation for the reaction between iron (II) sulfide and hydrochloric acid:

FeS + 2HCl → FeCl₂ + H₂S

From the equation, we can see that 1 mole of FeS reacts with 2 moles of HCl. We can use this information to calculate the number of moles of HCl needed to react with 20.0 grams of FeS ore.

First, we need to calculate the mass of pure FeS in the sample of ore. Since the ore contains 10.0% inert material, we know that only 90.0% of the sample is pure FeS:

mass of pure FeS = 20.0 grams x 0.90 = 18.0 grams

The number of moles of FeS in the pure sample is:

molar mass of FeS = 55.85 + 32.06 = 87.91 g/mol

moles of FeS = 18.0 grams / 87.91 g/mol = 0.2047 moles

Since 1 mole of FeS reacts with 2 moles of HCl, we need twice as many moles of HCl as FeS to ensure that all of the FeS reacts:

moles of HCl = 2 x 0.2047 moles = 0.4094 moles

Finally, we can calculate the mass of HCl needed using the molar mass of HCl:

molar mass of HCl = 1.01 + 35.45 = 36.46 g/mol

mass of HCl = 0.4094 moles x 36.46 g/mol = 14.92 grams

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Answer:

Acidic

Explanation:

On a standard Ph scale, anything lower than 7 on a scale is acidic and anything over 7 is alkaline lemon consists a large amount of acidity due to the amount of citric acid equipped inside it, Bleach is placed on the alkaline side of the scale because it includes chemicals such as Sodium hypochlorite and KOH(Potassium hydroxide) which can cause chemical burns when they are near contact as a substance itself.

Simply, if a substance has a ph of 3 it is acidic.

(if you'd like you could choose my answer as brainliest it would help me a lot)

The chemical formula of aspartame is C₁₄H₁₈N₂O₅ and it's relative molecular mass is 294.30 g/mol which is calculated as (12×14)+(1×18)+(14×2)+(16×5).

Molecular  mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molecular mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molar mass and formula mass are used as synonym for the molecular mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

Molecular masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.In case of aspartame it is calculated as,(12×14)+(1×18)+(14×2)+(16×5)=294.30 g/mol.

Thus , relative molecular mass or molecular mass of aspartame is 294.30 g/mol.

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Wiring that is covered with orange conduit may contain wiring with voltage levels between 42 and 100 volts is true

Orange conduit is a type of protective covering that is used to enclose electrical wiring. It is often used to indicate that the wiring inside contains low-voltage circuits, which are those with voltage levels between 42 and 100 volts. Low-voltage wiring is used in a variety of applications, including lighting, security systems, and communications systems. It is typically safe to work with, but it is important to follow proper safety procedures and use appropriate tools and protective gear when handling it. Orange conduit is just one of several colors of conduit that are used to indicate the voltage level of the wiring inside. Other colors that may be used include yellow (for medium voltage), red (for high voltage), and black (for extra high voltage).

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