Un hidrocarburo tiene como composición en masa: C= 85.8% ; H= 14.2% . Como dato nos brindan que una molécula de este compuesto pesa: LaTeX: 2.1x10^{-22}g2.1 x 10 − 22 g. Hallar la fórmula molecular. Datos: P.A (uma): C=12, H=1

Answer:

Explanation:

Overuse of antibiotics leads to bacteria's resistance against our drugs. This is increasing at an alarming rate and the reason is that overuse of antibiotics kills bacteria that lack the "resistance" gene or gene that can help them survive the antibiotics (similar is the case for insects that die to insecticides). But, some bacteria can have random mutations in their gene that can help them survive the antibiotic (similar is the case for some insects that can survive the insecticide), thus the surviving bacteria give rise to next generation of bacteria that are resistant to the given antibiotic (similar to how insects that survive the insecticide give birth to new insects that are resistant to insecticide too). Soon, every generation adds new antibiotic resistant bacteria (or new insecticide resistant insects in the case of insects) which is dangerous for all of life on this planet. Therefore, both are similar in the sense that new generations of these organisms will be resistant to our weapons against them.

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.


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The atom's nucleus is composed of neutrons and protons. BOTH: In the nucleus. Contribute to the mass of the atom. Mass equal 1 amu. PROTON. Number is atomic number of element. Determine the identity of the atom. NEUTRON: Neutral charge.

Subatomic particles are matter structures that are smaller in size than an atom. Hence, subatomic particles compose the atoms, determining their properties.

Many subatomic particles are unstable and remain unknown. However, three of them are the most stable ones,

Subatomic particles can be either,

Neutrons and protons compose the nucleus of the atoms, while electrons orbit around them.

These particles differ in their electric charge and their mass.

The number of protons in the atom is the atomic number and determines the atom's identity.

The massic number is the addition of the number of protons and the number of neutrons.

Atomic mass is composed of neutrons and protons mass. It is not the same as the massic number or the atomic weight.

When protons, neutrons, and electrons get together to form an atom, they lose part of their mass as energy. This is why the atomic weight is slightly inferior to the sum of masses.

1) BOTH

In the nucleus

Contribute to the mass of the atom

Mass equal 1 amu (1.67377 x 10⁻²⁷ kg or 1.67377 x 10⁻²⁴ g)

2) PROTON

Number is atomic number of element

Determine the identity of the atom

3) NEUTRON

Neutral charge

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Answer:

first identify the cation and write down its symbol and charge. Then, identify the anion and write down its symbol and charge.

Explanation:

Answer:

number of protons and neutrons

Explanation:

The warm and the cool air masses affects the formation of clouds and precipitation.

Warm and cool air masses can affect cloud formation. Clouds are formed when water vapor in the atmosphere rises and cools, condensing into tiny water droplets or ice crystals. The type and amount of clouds that form can be influenced by the temperature and moisture content of the air masses.

In general, the interaction between warm and cool air masses can result in cloud formation and precipitation.

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A buffer containing a higher concentration of sodium acetate than acetic acid would have a pH that is slightly higher than the pKa of acetic acid.

This is because the sodium acetate will react with any added acid, such as H+ ions, to form more acetic acid and sodium ions. This reaction will help to maintain the pH of the solution, but the excess sodium ions will slightly increase the pH of the solution.

In this case, the higher concentration of sodium acetate would shift the equilibrium towards the acetate ion, resulting in a higher pH.

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To solve this problem, we need to determine the amount of oleum produced when 9.33 kg of SO3 reacts with a certain amount of 91.34% H2SO4 to produce 4.71% oleum.

Let's first calculate the mass of H2SO4 present in the initial solution. Since the solution is 91.34% H2SO4, we have:

Mass of H2SO4 = 91.34% * 9.33 kg = 8.51 kg

Next, we can calculate the mass of oleum produced. Since the oleum concentration is 4.71%, we have:

Mass of Oleum = 4.71% * 9.33 kg = 0.439 kg

Therefore, approximately 0.439 kg of oleum was produced.

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Answer:

6192.756Km

Explanation:

multiply the length value by 1.609

3,848 × 1.609 =

its an aproximate of 6193KM

Answer:

pcl3 is the empirical formula of the compound

True: when using vsepr theory to determine molecular shape, a triple bond counts as a single electron domain even though it consists of three shared electron pairs.

The fundamental idea behind VSEPR is that the valence electron pairs that surround an atom have a tendency to reject one another and would therefore arrange themselves in a way to minimise this repulsion. In turn, this lowers the energy of the molecule and raises its stability, which establishes the molecular geometry. The electron-electron repulsion resulting from the Pauli exclusion principle, rather than the electrostatic repulsion, has been stressed by Gillespie as being more significant in dictating molecule geometry.

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Answer:

c

Explanation:

I believe its c but i could be wrong sorry if I am

In the given section, a mole can be defined as the amount of a substance that contains the same number of entities as there are atoms in 12 grams of pure carbon-12.

n grams and moles are related to the number of atoms, molecules, or other particles because one mole of any substance contains Avogadro's number of particles, which is 6.022 x 10²³ particles per mole.

For example, if you have 10 moles of a substance, then you have 6.022 x 10²⁴ particles of that substance. The relationship between moles and the number of particles is directly proportional to each other.

Therefore, if you increase the number of moles of a substance, you increase the number of particles of that substance.The number of atoms, molecules, or other particles in a sample is related to the mass of the sample.

The number of moles of a substance is proportional to the mass of the sample.

The relationship between the number of moles and the mass of a substance is given by the formula : n = m / M

where n = no. of moles ;

m = mass of the substance (in g) ;

M = molar mass of the substance in grams per mole.

Thus, the required answer is explained above.

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Within the yeast ATP synthase complex, the F1 portion is most directly involved with ATP synthesis. More specifically, the catalytic site of the F1 portion, known as the F1Fo-ATPase or F1 head, is directly responsible for ATP synthesis.

The yeast ATP synthase complex consists of two main portions: the F1 portion and the Fo portion. The F1 portion is located on the matrix side of the mitochondrial inner membrane and is responsible for ATP synthesis. It consists of five subunits (α3β3γδε) and contains the catalytic site for ATP synthesis. The catalytic site is found within the F1Fo-ATPase or F1 head, which is directly responsible for the synthesis of ATP.

The Fo portion, on the other hand, spans the mitochondrial inner membrane and acts as a proton channel, allowing the flow of protons across the membrane. This proton flow is harnessed by the F1 portion to drive the synthesis of ATP. However, in terms of direct involvement in ATP synthesis, it is the F1 portion and specifically the catalytic site within the F1 head that carries out the actual synthesis of ATP molecules.

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Answer:

M2 = 0.95M

Explanation:

M1V1 = M2V2

(1.9)(0.5) = M2(1)

M2 = 0.95M

It would take 180 years for an uncatalyzed reaction to reduce the concentration of a 1.00 M sucrose solution to 0.75 M due to the rate constant of the hydrolysis of sucrose in water being 1.6 x 10^-5 year^-1 at room temperature and neutral pH.

Sucrose hydrolysis is a relatively slow reaction that occurs over a long period of time, and the rate constant represents the rate of disappearance of sucrose molecules. Therefore, to calculate the time required for a specific concentration change, the initial concentration and final concentration, as well as the rate constant, must be known.

In this case, the time required for a 25% decrease in concentration is 180 years, assuming that the reaction conditions remain constant over time.

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(a) The percentage composition of NaCl is approximately 39.34% sodium and 60.66% chlorine. (b) The percentage composition of AgNO₃ is approximately 63.52% silver, 8.25% nitrogen, and 28.23% oxygen.

To determine the percentage composition of a compound, we need to find the mass of each element present in the compound and express it as a percentage of the total mass of the compound. Let's calculate percentage composition of each compound;

NaCl (Sodium chloride);

The formula unit for sodium chloride is NaCl. It consists of one sodium atom (Na) and one chlorine atom (Cl).

To calculate the percentage composition, we need to determine the molar mass of each element. The molar mass of sodium (Na) is approximately 22.99 g/mol, and the molar mass of chlorine (Cl) is approximately 35.45 g/mol.

The total molar mass of NaCl is;

22.99 g/mol (Na) + 35.45 g/mol (Cl)

= 58.44 g/mol

The percentage composition of sodium (Na) in NaCl is;

(22.99 g/mol / 58.44 g/mol) × 100% ≈ 39.34%

The percentage composition of chlorine (Cl) in NaCl is;

(35.45 g/mol / 58.44 g/mol) × 100% ≈ 60.66%

Therefore, the percentage composition of NaCl is approximately 39.34% sodium and 60.66% chlorine.

AgNO₃ (Silver nitrate);

The formula unit for silver nitrate is AgNO₃. It consists of one silver atom (Ag), one nitrogen atom (N), and three oxygen atoms (O).

To calculate the percentage composition, we need to determine the molar mass of each element. The molar mass of silver (Ag) is approximately 107.87 g/mol, the molar mass of nitrogen (N) is approximately 14.01 g/mol, and the molar mass of oxygen (O) is approximately 16.00 g/mol.

The total molar mass of AgNO₃ is;

107.87 g/mol (Ag) + 14.01 g/mol (N) + (16.00 g/mol (O) × 3)

= 169.87 g/mol

The percentage composition of silver (Ag) in AgNO₃ is;

(107.87 g/mol / 169.87 g/mol) × 100% ≈ 63.52%

The percentage composition of nitrogen (N) in AgNO₃ is;

(14.01 g/mol / 169.87 g/mol) × 100%

≈ 8.25%

The percentage composition of oxygen (O) in AgNO₃ is;

(16.00 g/mol (O) × 3 / 169.87 g/mol) × 100%

≈ 28.23%

Therefore, the percentage composition of AgNO₃ is approximately 63.52% silver, 8.25% nitrogen, and 28.23% oxygen.

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--The given question is incomplete, the complete question is

"Determine the percentage composition of each of the following compounds a) NaCl b) AgNO₃."--

The percentage composition of a compound can be determined by calculating the relative mass of each element in the compound. For example, the percentage composition of glucose (C6H12O6) is approximately 40.00% carbon, 6.71% hydrogen, and 53.29% oxygen.

The percentage composition of a compound can be determined by calculating the relative mass of each element in the compound. To do this, you need to know the chemical formula of the compound and the atomic masses of the elements involved.

Let's take an example to illustrate the calculation. Suppose we have a compound with the chemical formula C6H12O6, which represents glucose. To determine the percentage composition of this compound, we need to calculate the mass of carbon (C), hydrogen (H), and oxygen (O) in relation to the total mass of the compound.

The atomic mass of carbon is 12.01 g/mol, hydrogen is 1.01 g/mol, and oxygen is 16.00 g/mol. The molecular mass of glucose can be calculated by adding the atomic masses of each element: (6 * 12.01) + (12 * 1.01) + (6 * 16.00) = 180.18 g/mol.

To calculate the percentage composition of carbon, we divide the mass of carbon by the total mass of the compound and multiply by 100: (6 * 12.01 / 180.18) * 100 = 40.00%.

Similarly, we can calculate the percentage composition of hydrogen and oxygen: (12 * 1.01 / 180.18) * 100 = 6.71% for hydrogen, and (6 * 16.00 / 180.18) * 100 = 53.29% for oxygen.

Therefore, the percentage composition of glucose (C6H12O6) is approximately 40.00% carbon, 6.71% hydrogen, and 53.29% oxygen.

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Answer:

answer is B

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Answer:

Hidróxido de potasio

Compuesto químico

El hidróxido de potasio es un compuesto químico inorgánico de fórmula KOH. Tanto él como el hidróxido de sodio son bases fuertes de uso común. Tiene muchos usos tanto industriales como comerciales. La mayoría de las aplicaciones explotan su reactividad con ácidos y su corrosividad natural. Wikipedia

Fórmula: KOH

Explanation:

When solid KCl is added to a solution that already contains saturated KCl, the chloride concentration will not change.

This is because the solid KCl is already in its maximum saturated concentration and cannot dissolve further. Therefore, it will not increase the chloride concentration of the solution.


When solid KCl is added to a solution that already contains saturated KCl, the solution is already saturated and the solid KCl cannot dissolve further. Therefore, adding solid KCl to the solution will not change the chloride concentration of the solution.

This is because the solid KCl is already in its maximum saturated concentration and adding more solid KCl will not further dissolve and increase the chloride concentration of the solution.

This is known as the law of maximum saturation which states that a solution can only contain the maximum concentration of the substance it can dissolve, and any additional material that is added to the solution will remain in its solid form.

Therefore, adding solid KCl to a solution that already contains saturated KCl will not affect the chloride concentration.

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They move at various speeds and bounce off one another. Being slower than air, though. Although they stop moving, the water molecules remain in motion. Slowing down, the Air. Water molecules—both those in the liquid and the vapor state—are travelling quickly.

a substance's tiniest particle possesses all of its physical and chemical characteristics. A single atom or more make up a molecule.

The tiniest particle in such a chemical compound or element that possesses the chemical characteristics of that compound or an element is known as a molecule. Atoms are the building blocks of molecules, and chemical bonds are what hold them together. Two different types of molecules exist: An element's molecules An element is composed up of molecules.

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Answer:

0.807 moles

Explanation:

No of molecules = No of mole × Avogadro's number

No of mole = No of molecules / Avogadro's number

No of mole = 5.24×10^23/6.02×10^23

0.870 moles

The false statement would be statement B) "They provide a significant amount of calories." Non-digestible carbohydrates do not provide significant calories since they are not broken down and absorbed by the body. Therefore, statement B) is false.

To identify the false statement about non-digestible carbohydrates, we need to consider their characteristics and properties. Here are some common characteristics of non-digestible carbohydrates, also known as dietary fiber:

1. They are resistant to enzymatic digestion: Non-digestible carbohydrates cannot be broken down by the enzymes present in the human digestive system.

2. They provide little to no caloric value: Since they are not digested, non-digestible carbohydrates generally do not contribute significant calories to the diet.

3. They promote bowel regularity: Non-digestible carbohydrates add bulk to the stool, aiding in the movement of food through the digestive system and preventing constipation.

4. They can be fermented by gut bacteria: Certain types of non-digestible carbohydrates, such as soluble fibers, are fermented by beneficial gut bacteria in the large intestine, leading to the production of short-chain fatty acids.

The complete question should be:

which statement about non-digestible carbohydrates is false?

A) They are resistant to enzymatic digestion.

B) They provide a significant amount of calories.

C) They promote bowel regularity.

D) They cannot be fermented by gut bacteria.

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Answer:

1 Hydrogen 1s1

2 Helium 1s2

3 Lithium [He]2s1

4 Beryllium [He]2s2

5 Boron [He]2s22p1

6 Carbon [He]2s22p2

7 Nitrogen [He]2s22p3

8 Oxygen [He]2s22p4

9 Fluorine [He]2s22p5

10 Neon [He]2s22p6

11 Sodium [Ne]3s1

12 Magnesium [Ne]3s2

13 Aluminum [Ne]3s23p1

14 Silicon [Ne]3s23p2

15 Phosphorus [Ne]3s23p3

16 Sulfur [Ne]3s23p4

17 Chlorine [Ne]3s23p5

18 Argon [Ne]3s23p6

19 Potassium [Ar]4s1

20 Calcium [Ar]4s2

21 Scandium [Ar]3d14s2

22 Titanium [Ar]3d24s2

23 Vanadium [Ar]3d34s2

24 Chromium [Ar]3d54s1

25 Manganese [Ar]3d54s2

26 Iron [Ar]3d64s2

27 Cobalt [Ar]3d74s2

28 Nickel [Ar]3d84s2

29 Copper [Ar]3d104s1

30 Zinc [Ar]3d104s2

31 Gallium [Ar]3d104s24p1

32 Germanium [Ar]3d104s24p2

33 Arsenic [Ar]3d104s24p3

34 Selenium [Ar]3d104s24p4

35 Bromine [Ar]3d104s24p5

36 Krypton [Ar]3d104s24p6

37 Rubidium [Kr]5s1

38 Strontium [Kr]5s2

39 Yttrium [Kr]4d15s2

40 Zirconium [Kr]4d25s2

41 Niobium [Kr]4d45s1

42 Molybdenum [Kr]4d55s1

43 Technetium [Kr]4d55s2

44 Ruthenium [Kr]4d75s1

45 Rhodium [Kr]4d85s1

46 Palladium [Kr]4d10

47 Silver [Kr]4d105s1

48 Cadmium [Kr]4d105s2

49 Indium [Kr]4d105s25p1

50 Tin [Kr]4d105s25p2

51 Antimony [Kr]4d105s25p3

52 Tellurium [Kr]4d105s25p4

53 Iodine [Kr]4d105s25p5

54 Xenon [Kr]4d105s25p6

55 Cesium [Xe]6s1

56 Barium [Xe]6s2

57 Lanthanum [Xe]5d16s2

58 Cerium [Xe]4f15d16s2

59 Praseodymium [Xe]4f36s2

60 Neodymium [Xe]4f46s2

61 Promethium [Xe]4f56s2

62 Samarium [Xe]4f66s2

63 Europium [Xe]4f76s2

64 Gadolinium [Xe]4f75d16s2

65 Terbium [Xe]4f96s2

66 Dysprosium [Xe]4f106s2

67 Holmium [Xe]4f116s2

68 Erbium [Xe]4f126s2

69 Thulium [Xe]4f136s2

70 Ytterbium [Xe]4f146s2

71 Lutetium [Xe]4f145d16s2

72 Hafnium [Xe]4f145d26s2

73 Tantalum [Xe]4f145d36s2

74 Tungsten [Xe]4f145d46s2

75 Rhenium [Xe]4f145d56s2

76 Osmium [Xe]4f145d66s2

77 Iridium [Xe]4f145d76s2

78 Platinum [Xe]4f145d96s1

79 Gold [Xe]4f145d106s1

80 Mercury [Xe]4f145d106s2

81 Thallium [Xe]4f145d106s26p1

82 Lead [Xe]4f145d106s26p2

83 Bismuth [Xe]4f145d106s26p3

84 Polonium [Xe]4f145d106s26p4

85 Astatine [Xe]4f145d106s26p5

86 Radon [Xe]4f145d106s26p6

87 Francium [Rn]7s1

88 Radium [Rn]7s2

89 Actinium [Rn]6d17s2

90 Thorium [Rn]6d27s2

91 Protactinium [Rn]5f26d17s2

92 Uranium [Rn]5f36d17s2

93 Neptunium [Rn]5f46d17s2

94 Plutonium [Rn]5f67s2

95 Americium [Rn]5f77s2

96 Curium [Rn]5f76d17s2

97 Berkelium [Rn]5f97s2

98 Californium [Rn]5f107s2

99 Einsteinium [Rn]5f117s2

100 Fermium [Rn]5f127s2

101 Mendelevium [Rn]5f137s2

102 Nobelium [Rn]5f147s2

103 Lawrencium [Rn]5f147s27p1

104 Rutherfordium [Rn]5f146d27s2

105 Dubnium *[Rn]5f146d37s2

106 Seaborgium *[Rn]5f146d47s2

107 Bohrium *[Rn]5f146d57s2

108 Hassium *[Rn]5f146d67s2

109 Meitnerium *[Rn]5f146d77s2

110 Darmstadtium *[Rn]5f146d97s1

111 Roentgenium *[Rn]5f146d107s1

112 Copernium *[Rn]5f146d107s2

113 Nihonium *[Rn]5f146d107s27p1

114 Flerovium *[Rn]5f146d107s27p2

115 Moscovium *[Rn]5f146d107s27p3

116 Livermorium *[Rn]5f146d107s27p4

117 Tennessine *[Rn]5f146d107s27p5

118 Oganesson *[Rn]5f146d107s27p6

Explanation:

Answer:

Isotopes is a phenomenon whereby atoms of the same element exhibit different mass numbers but have the same atomic number.I hope this helps... Thank you for the question

Answer:

Well, the acetone has a dipole, so dipole-dipole forces will be present. Water has a dipole and can also hydrogen bond, as can isobutyl alcohol.

Explanation:

All the possible intermolecular forces between acetone and water will be dipole - dipole interaction force and hydrogen bond.

The attractive interactions between both the positive ends of one polar molecule as well as the negative ends of another polar molecule were known as dipole-dipole forces.

A hydrogen bond seems to be an electrical attraction between such a hydrogen atom covalently bonded to a much more electronegative "donor" atom and group and maybe another electronegative with a single pair of electrons.

Acetone possesses a dipole, there must be dipole-dipole forces. Isobutyl alcohol, like water, does have a dipole and therefore can hydrogen bond.

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Answer:

It has the most quantitative effect on the average atomic mass of the element.

Explanation:

Tungsten's most common isotope will have the most quantitative effect on the average atomic mass.

The most common isotope of tungsten will represent its most abundant isotope.

The isotope with the most geonormal abundance will have the highest effect on the average atomic mass of an element.

Answer:

Approximately \(41.2\; {\rm ^{\circ} C}\).

Explanation:

Let \(t\; {\rm ^{\circ} C}\) be the final temperature of the water and the iron.

Temperature of the water would be increase by \((t - 38.00)\; {\rm ^{\circ} C}\).

Temperature of the iron would be reduced by \((100.0 - t)\; {\rm ^{\circ} C}\).

Let \(c\) denote the specific heat of each material. Let \(m\) denote the mass of the material. For a temperature change of \(\Delta t\), the energy change involved would be:

\(Q = c\, m \, \Delta t\).

The energy that the water need to absorb would be:

\(\begin{aligned}& Q(\text{water, absorbed}) \\ =\; & c(\text{water}) \, m(\text{water})\, \Delta t (\text{water}) \\ =\; & 4.181\; {\rm J \cdot g^{-1} \cdot K^{-1}} \times 50\; {\rm g} \times (t - 38.00)\; {\rm ^{\circ} C} \\ =\; & (209.05\, t - 7943.9)\; {\rm J} \end{aligned}\).

The energy that the iron would need to release would be:

\(\begin{aligned}& Q(\text{iron, released}) \\ =\; & c(\text{iron}) \, m(\text{iron})\, \Delta t (\text{iron}) \\ =\; & 0.45\; {\rm J \cdot g^{-1} \cdot K^{-1}} \times 25.0\; {\rm g} \times (100.0 - t)\; {\rm ^{\circ} C} \\ =\; & (1125 - 11.25 \, t)\; {\rm J} \end{aligned}\).

Since this calorimeter is insulated, the energy that the iron had released would be equal to the energy that the water had absorbed:

\(Q(\text{water, absorbed}) = Q(\text{iron, released})\).

\(209.05\, t - 7943.9 = 1125 - 11.25\, t\).

\(t \approx 41.2\).

Thus, the final temperature of the water and the iron would be approximately \(41.2\; {\rm ^{\circ} C}\).