What is the mass of a single atom, which is approximately equal to the total mass of the protons and neutrons in an atom called?

Answer:

Plants use carbon dioxide to make food.

Explanation:

Answer:B

Explanation: i did it

Answer:

Transition metals, alkali metals, alkaline earth metals Transition metals - Middle of the periodic chart, only average reactivity. alkali metals - As mentioned above, very reactive. Bad choice, going from lower reactivity to higher reactivity.

Hope this answer is right!

Answer: answer what..

Answer:

evan..

Explanation:

toThis is a Valid statement about pressure .

What is pressure?

Pressure is continues physical force exerted on or against an object by something in contact with.

Sol-We know the idol gas equation, idyl gas equation. P v is equals to n r t. We can write the equation. As of the p is equal to n r upon v into p. Now n r upon v is equals to constant, is equals to constant. So we can write. P is equal to c into t. So now let us consider the ambient by the  condition, which is p not equals to 101325 p. A and t naught is equal to 90 degrees. Fahrenheit will convert this value kelvin and get 5048.37 kelvin. So the value of p, not anti. Note is 0 now from the modified idol equation. We are have p equal to c t, so we can write it as a p. Not is equal to c and t not so the we'll substitute the values 1013 to 5 p, a which is equal to c 2348.37 kelvin.

So here we get the value of c, which is equals to 43.147. So from this we can say that the change by  in pressure for the 10 degree temperature by the  drops so here delta equal to delta, which is equal to the 10 degrees fahrenheit. We can again convert this value in the kelvin and we get 260.93 kelvin, so delta to  p is equal to c into delta. This will be delap equals to 43.147, as we get the value of c and 2 red 60.93 kelvin p, so delta p is equal to 43.147 So from this we can say We can again convert this value in the kelvin by it  and we are get the 260.93 kelvin, so delta p is equal to c into delta. This will be delap equals to 43.147, as we get the value of c and 2 red 60.93 kelvin p, so delta p is equal to 43.147 and 260.93 kelvin upon 694.75 p s. I so we are finally get the value of delta p, which is equals to 1.63 p s. I.

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Answer:

sharp clever bright

Explanation:

s

Answer:

will you friend me please

Answer:

17.09g/L

Explanation:

Density = total mass of elements/ volume

We need to find the mass of each mixture constituents using their molar mass:

mole = mass/molar mass

For Neon (Ne) which contains 0.650mol;

0.650 = mass/20.18

mass = 0.650 × 20.18

mass = 13.12g

For Krypton (Kr) which contains 0.321mol;

0.321 = mass/83.79

mass = 0.321 × 83.79

mass = 26.89g

For Xenon (Xe) which contains 0.190mol;

0.190 = mass/131.3

mass = 0.190 × 131.3

mass = 24.95g

Total mass = 13.12g + 26.89g + 24.95g = 64.96g

Density = total mass / volume

Density = 64.96g / 3.80L

Density of the mixture = 17.09g/L

This experiment shows that the elements of pure solid substance in a system closed off from the surroundings has increased temperature very fast.

Pure substances are substances that are built up of only one kind of particle and have a fixed or abiding structure. Pure substances are further confidential as elements and compounds. An element is a substance that comprises only one type or kind of atom. a pure substance has a constant chemical composition.

No affair where you sample a substance, it is the same. For chemistry, the safest examples of pure substances are elements and compounds. So, examples cover gold, silver, helium, sodium chloride, and pure water.

So we can conclude that In chemistry, a pure substance is an element or compound made up of one type of particle.

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The atoms present in all molecules are bonded with some interatomic attractions. These molecular forces may be strong or weak. These attractions are known as intermolecular forces.

London forces are defined as the intermolecular forces of attraction holding molecules together. They are one of the Vander Waal's forces of attraction but are the only force present in materials that don't have polar dipole molecules . For example, among the noble gases like Ne & Ar.

Dipole–dipole forces basically, occur between molecules with permanent dipoles (i.e., polar molecules). For molecules of similar size and mass, the strength of these dipole-dipole forces increases with increasing polarity.

Hydrogen bonding is defined as the interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is usually weaker than an ionic bond or covalent bond but stronger than van der Waals forces.

The above question is inappropriate so I have answered according to general knowledge.

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Answer: I had this answer on my test and got it correct. The answer is C

Explanation: the explanation is above

Answer:

the answer is A

Explanation:

I dont really have an explanation but hope it helps

Answer:

A)

Explanation:

I took the test!

The empirical formula of this compound is \(Fe_2O_3\)

To calculate the empirical formula of a compound, the value of moles of each element is needed.

As we have the information of the mass value, we will use the molar mass expression, which corresponds to:

\(MM_O = 16g/mol\\MM_Fe = 55.8g/mol\)

                                              \(MM = \frac{m}{mol}\)

                                                   \(16 = \frac{4.8}{x}\)

                                                   \(x = 0.3mol\)

                                                    \(55.8=\frac{11.2}{x}\\x = 0.2\)

As the value of the empirical formula must be an integer, simply multiply the two values ​​by a common factor:

                                                \(O = 0.3 \times 10 = 3\\Fe = 0.2 \times 10 = 2\)

                                                       \(Fe_2O_3\)

So, the empirical formula of this compound is \(Fe_2O_3\).

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A full response is that the molecule with 32.1 g of S and 32 g of O has the empirical formula SO2.

Every compound's empirical formula is the simplest whole-number ratio of all of its atom types. It could occasionally be the same as the compound's molecular formula.

By first calculating the masses of each element contained in a compound, it is possible to experimentally ascertain the complex's empirical formula. Afterward, turning each element's mass into a corresponding mole.

To determine the empirical formula of the compound, we need to find the simplest whole-number ratio of the elements in the compound.

Moles of S = mass of S / molar mass of S

Moles of S = 32.1 g / 32.06 g/mol (molar mass of S)

Moles of S = 1.001 mol

Moles of O = mass of O / molar mass of O

Moles of O = 32 g / 15.99 g/mol (molar mass of O)

Moles of O = 2.001 mol

Moles of S in simplest ratio = 1.001 mol / 1.001 mol = 1

Moles of O in simplest ratio = 2.001 mol / 1.001 mol = 2

The empirical formula of the compound is SO2.

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Energy will always affect the appearance of the lake because it is made up of water which is subject to physical changes.

Phase transition occurs in the three states of matter which include: solid, liquid and gas.

The lake is made up of water and so therefore would undergo phase transition based on the level of energy.l

During high energy, there is increase in kinetic energy between the molecule of water that makes up for he lake.

This may lead to total evaporation or decrease in the amount of lake water.

During low energy, there is reduction of kinetic energy between the molecule of water that makes up for he lake leading to its freezing.

Therefore, energy will always affect the appearance of the lake because it is made up of water which is subject to physical changes.

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The jumbled word "gzeysktqix" can be unscrambled to form the word "skyzigtext."

Here are possible words that can be made from this jumbled word:

Sky: Referring to the atmosphere above the Earth.

Zig: Describing a series of sharp turns or angles.

Text: Referring to written or printed words.

Six: The number following five and preceding seven.

It seems that the jumbled word has provided a mix of letters that can be rearranged to form these words. This exercise is likely intended to enhance the student's vocabulary skills, spelling ability, and problem-solving skills. By unscrambling the letters, the student is encouraged to explore different word possibilities and apply their knowledge of language. It also promotes critical thinking and creativity as they find valid words from the given set of letters.

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Answer:

You are unable to lift an object. Which property makes the object difficult to lift?(1 point)

weight

Answer:

B. Independent variable

Explanation:

In an experiment, the independent variable is the variable that the experimenter manipulates or changes in order to effect a response in another variable, called the dependent variable.

In this experiment where Rachel adds varying amount of light in order to see how it impacts plant growth over time. The independent variable is the SUNLIGHT because it is what is changed or manipulated by Rachel. The dependent variable is the plant growth.

Key words:-

Now

Apply combined gas law

\(\\ \tt\hookrightarrow \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}\)

\(\\ \tt\hookrightarrow \dfrac{1(1.2)}{273}=\dfrac{(0.800)V_2}{299}\)

\(\\ \tt\hookrightarrow 0.004=0.002V_2\)

\(\\ \tt\hookrightarrow V_2=2L\)(Approx)

A compound with a formula of C₉H₁₂ and a 1H NMR spectrum of delta 1.0 (t, 3 H), delta 1.7 (sextet; 2 H), delta 2.6 (t, 2 H), delta 7.2 (m, 5 H) s C₆H₅CH₂CH₂CH₃.

The method of spectroscopy known as nuclear magnetic resonance, more usually abbreviated as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is used to study the local magnetic fields that surround atomic nuclei.  The sample is then placed in a magnetic field, and the NMR signal is produced by exciting the nuclei of the sample with radio waves to produce nuclear magnetic resonance.

This signal is then detected using sensitive radio receivers. Because of the change in resonance frequency brought about by the presence of an intramolecular magnetic field surrounding an atom in a molecule, it is possible to obtain information regarding the electronic structure of a molecule and the particular functional groups that it contains.

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Answer:

D

Explanation:

A buffer solution contains (1)a weak base and its salt, or (2) a weak acid and its salt.

So, the combination of the weak acid CH3COOH and its salt CH3COONa will make a buffer.

Answer:

D. CH3COOH and CH3COONa

Explanation:

A buffer is made of:

- a weak acid + its conjugate base

- a weak base + its conjugate acid

A. NaOH is a strong base

B. KOH is a strong base

C. HCl is a strong acid

Answer:

5 m/s²

Explanation:

From the question given above, it took 8 s for the train to get to a speed of 45 m/s. This simply means the train was maintaining 5 m/s as it travels in order to get to an open track.

Thus, we obtained the following data from the question.

Initial velocity (u) = 5 m/s

Final velocity (v) = 45 m/s

Time (t) = 8 s

Acceleration (a) =.?

Acceleration is simply defined as the rate of change of velocity with time. Mathematically, it can be expressed as:

a = (v – u) /t

Where:

a is the acceleration.

v is the final velocity.

u is the initial velocity.

t is the time.

With the above formula, we can obtain the velocity of the train as follow:

Initial velocity (u) = 5 m/s

Final velocity (v) = 45 m/s

Time (t) = 8 s

Acceleration (a) =.?

a = (v – u) /t

a = (45 – 5) / 8

a = 40/8

a = 5 m/s²

Therefore, the acceleration of the train is 5 m/s².

Answer:

Its B =)

Explanation:

Answer:

Explanation: Liquid Chromatography  

I'm sorry if i'm wrong

Nitrogen G is a colorless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter of nitrogen.

Nitrogen is an essential gaseous element with an atomic number of 7 and an atomic weight of 14.0067. Nitrogen gas has two particles of Nitrogen therefore, the molecular formula of this gas is N2. It is a non-metallic element that settled Group 15

nitrogen. [ nī′trə-jən ] N. A nonmetallic element that constructs up about 78 percent of the atmosphere by capacity, Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table

So we can conclude that Nitrogen is the chemical element with the symbol N and atomic number 7.

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Answer:

(14)The pH is 8.3 and is basic

(15) pOH = 11.0 The solution is acidic

Explanation:

(14) From the question,

pH = -log[H₃O⁺]............... Equation 1

Given: H₃O⁺ = 5.6×10⁻⁹ M

Substitute the value above into equation 1

pH = -log[5.6×10⁻⁹]

pH = 8.3

The pH is 8.25 and is basic.

(15)

pOH = -log[OH⁺]................ Equation 2

Given: [OH⁺] = 8.34×10⁻¹² M

Substitute into equation 2

pOH = -log[8.34×10⁻¹²]

pOH = 11.0 Hence the solution is acidic

Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?When heat is added to ice at 0°C, the temperature of the ice does not change. This happens because all the heat energy is used up in overcoming the intermolecular forces of attraction (hydrogen bonds) that exist between the water molecules in ice.

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Answer:

PbS shows a very low solubility in water, and it is insoluble in organic solvents. Any "dissolution" process in acids (hydrochloric acid, nitric acid, aqua regia) is accompanied with a chemical reaction whereby H2S is liberated and the corresponding soluble Pb2+ salts are formed. hope that helps

Organic chemistry is almost synonymous with benzoene. a significant organic compound with several applications. In reality, benzene use and production are significant indicators of a country's industrial advancement.

Thus, In steel, petrochemical, and oil refineries, benzene, a fundamental aromatic chemical, is created.

Numerous downstream petrochemical products, such as detergents, insecticides, resins, and nylon tyres, are produced using it.

In the corresponding aromatic recovery units, steel companies produce benzene from the coke oven gas. Benzene is also produced by a number of petrochemical facilities. So let's examine the various benzene preparation techniques.

Thus, Organic chemistry is almost synonymous with benzoene. a significant organic compound with several applications. In reality, benzene use and production are significant indicators of a country's industrial advancement.

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Answer: b) calcium sulfide

Explanation:

The circumstance which is it appropriate to ignore a data point when drawing the best line through data to make a graph is when there is the presence of the outliers.

This is defined as the pictorial representation of data or variables in an organized manner.

The graph when plotted contain a lot of points in which a line is drawn to pass the majority of them. In situations whereby some of the data point don't follow the line drawn then it must be ignored.

This is because they don't usually reflect the trend of the data which is why this particular scenario was chosen as the most appropriate choice.

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