How many C atoms are there in a sample of C,H, that contains 6.59 x 1026 H atoms?
A. 1.98 x 1027 C atoms
B. 2.47 x 1026 C atoms
C. 4.94 x 1026 C atoms
D. 3.17 x 1024 C atoms

Explanation:

The molar mass of lithium chloride (LiCl) is approximately 42.39 g/mol.

To calculate the mass of LiCl that contains 8.75 g of chloride, we need to determine the amount of LiCl that corresponds to 8.75 g of chloride.

The chloride ion (Cl-) has a molar mass of approximately 35.45 g/mol. Therefore, the number of moles of chloride present in 8.75 g of chloride is:

8.75 g / 35.45 g/mol = 0.247 mol Cl-

Since each mole of LiCl contains 1 mole of Cl-, the number of moles of LiCl that contains 0.247 mol of Cl- is also 0.247 mol.

Therefore, the mass of LiCl that contains 8.75 g of chloride is:

0.247 mol LiCl x 42.39 g/mol = 10.46 g LiCl (rounded to two decimal places)

Therefore, 10.46 g of lithium chloride would contain 8.75 g of chloride.

As per the given details, 10.45 grams of lithium chloride would contain 8.75 grams of chloride.

We must first estimate the molar mass of chloride and then use stoichiometry to connect it to the molar mass of lithium chloride (LiCl), in order to calculate the mass of LiCl that would contain 8.75 grammes of chloride.

The molar mass of chloride (Cl) = 35.45 g/mol.

The molar mass of lithium chloride = 42.39 g/mol.

(8.75 g chloride) / (35.45 g/mol chloride) = (x g lithium chloride) / (42.39 g/mol lithium chloride)

Solving for the variable:

x = (8.75 g chloride) * (42.39 g/mol lithium chloride) / (35.45 g/mol chloride)

x ≈ 10.45 g lithium chloride

Thus, approximately 10.45 grams of lithium chloride would contain 8.75 grams of chloride.

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3.91 ×10²⁴ carbon atoms are in 6.5 moles of carbon. The smallest unit of matter that may be divided without producing electrically charged particles is the atom.

The smallest unit of matter that may be divided without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry. Space makes up the majority of an atom.

The rest is made up of a cloud of electrons that are negatively charged surrounding a nucleus that is positively charged made up of protons and neutrons. Compared to electrons, which are the smallest charged particles in nature, the nucleus is small and dense. Electric forces, which link radicals to the nucleus of atoms, cause them to be drawn to any positive charge.

number of atoms= 6.5 ×  6.022×10²³

          =3.91 ×10²⁴  

Therefore, 3.91 ×10²⁴ carbon atoms are in 6.5 moles of carbon.

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Answer:

Correct Answer:

1. Hydrogen bonding causes water to be strongly cohesive.

Answer:

0.322 g

Explanation:

Since our concentration is given in mass per volume percent % (m/v)

% (m/v) = mass of solute in g/volume of solution in mL × 100%

Since % (m/v) = 0.92 and volume of the required solution is 35.0 mL, we find the mass of NaCl from

mass of NaCl = % (m/v)/100 % × volume of solution

= 0.92 % (m/v)/100 %× 35 mL

= 0.0092 × 35

= 0.322 g

The study of a chemical is called chemistry.

The correct answer is 0.322 g

The saline is said that the amount of salt present in the solution. The formula used to solve the question is as follows:-

\(\frac{m}{v} = \frac{mass \ of\ solute}{volume\ of\ solution} * 100\)

The data is given as follows:-

Mass of NaCl is as follows:-

 \(\frac{0.92}{100} * 35 mL\)

\(0.0092 * 35\\= 0.322 g\)

Hence, the correct answer is 0.322g.

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Answer:

Explanation:

m= 80.0 g

Cp=0.8 J/gc

Change in T= 25

q=Cp X m X T  =0.8 X 80.0 X 25 =1600J

Postive q or enthalpy makes it endothermic.

Active transport requires energy to transport the molecules across the cell membrane. Thus, Option A is correct.

Active transport is the transport of molecules from a lower concentration to a higher concentration across the cell (plasma) membrane. As this process is against the concentration gradient, it requires cellular energy to transport the molecules or ions. Active transport involves Primary active transport and secondary active transport.

Passive transport involves the movement of molecules from a higher to lower concentration gradient and thus does not require energy and is slower than active transport.

Therefore, only active transport requires energy for the transportation of molecules across the cell membrane.

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Answer:

Decomposition

Explanation:

Because when it becomes separate it is decomposing.

Answer:

Average specific heat capacity of metal = 0.57 J/g°C

Explanation:

Heat lost = Heat gained

Heat energy gained or lost, H = mcΔT

where m = mass of substance, c = specific heat capacity, ΔT = temperature change

Trial 1:

Heat lost by metal = -[2.746 g × c × ΔT]

ΔT = (26.3 - 72.1) °C = -45.8 °C

Heat lost by metal = -[2.746 g × c × (-45.8 °C)] = c × (125.7688)g°C

Heat gained by water = 15.200 × 4.18 × ΔT

ΔT = (26.3 - 24.7) = 1.6 °C

Heat gained by water = 15.200 × 4.18 × 1.6 = 101.6576 J

From Heat lost = Heat gained

c × (125.7688)g°C = 101.6576 J

c = 101.6576 J / 125.7688 g°C

c = 0.8083 J/g°C

Trial 2:

Heat lost by metal = -[2.750 g × c × ΔT]

ΔT = (26.2 - 72.2)°C] = - 46 °C

Heat lost by metal = -[2.750 g × c × (-46 °C)

Heat lost by metal = c × (126.5) g°C

Heat gained by water = 15.206 × 4.18 × ΔT

ΔT = (26.2 - 24.6) = 1.6 °C

Heat gained by water = 15.206 × 4.18 × 1.6 = 101.697728 J

From Heat lost = Heat gained

c × (126.5)g°C = 101.6977 J

c = 101.697728 J / 126.5 g°C

c = 0.8039 J/g°C

Trial 3:

Heat lost by metal = -[2.900 g × c × ΔT]

ΔT = (24.7 - 71.9)°C] = - 47.2 °C

Heat lost by metal = -[2.900 g × c × (- 47.2 °C)

Heat lost by metal = -[2.900 g × c × (- 47.2)°C] = c × (136.88)g°C

Heat gained by water = 15.201 × 4.18 × ΔT

ΔT = (24.7 - 24.5) = 0.2 °C

Heat gained by water = 15.201 × 4.18 × 0.2 = 12.708036 J

From Heat lost = Heat gained

c × (136.88)g°C = 12.708036 J

c = 12.708036 J / 136.88 g°C

c = 0.0928 J/g°C

Average specific heat capacity of metal = (0.8083 + 0.8039 + 0.0928) J/g°C / 3

Average specific heat capacity of metal = 0.57 J/g°C

Answer:

pH = 7.30

Explanation:

You can find the pH using the following equation:

pH = -log[H⁺]

In this equation, [H⁺] represents the hydrogen ion concentration. You can plug the given value into the equation and solve to find the pH.

pH = -log[H⁺]

pH = -log[5 x 10⁻⁸]

pH = 7.30

KClO\(_3\) is the empirical formula for a compound that is 31.9% potassium, 28.9% chlorine, and 39.2% oxygen.

The definition of an empirical formula for a compound is one that displays the ratio of the components present in the complex but not the precise number of atoms in the molecule. Subscripts are used adjacent to the component symbols to indicate the ratios.

The subscripts in the empirical formula, which represent the ratio of the elements, are the smallest whole integers, making it referred to as the simplest formula.

moles  = % composition/molar  mass

moles  of potassium  =  31.9 / 39 = 0.818  moles

moles of  chlorine    = 28.9/35.5 = 0.814 moles

moles of   oxygen  =  39.2/  16 =  2.45  moles

potassium = 0.818/0.814  =1  

chlorine  =  0.814/0.814 = 1

oxygen =  2.45 /0.814 =3

empirical  formula = KClO\(_3\)

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Answer: The mass in grams is 514.8.

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number \(6.023\times 10^{23}\) of particles.

To calculate the number of moles, we use the equation:

\(\text{Number of moles}=\frac{\text{Given molecules}}{\text{Avogadros number}}\)

given molecules = \(7.03\times 10^{24}\)  

Putting in the values we get:

\(\text{Number of moles}=\frac{7.03\times 10^{24}}{6.023\times 10^{23}}=11.7moles\)

mass of \(CO_2=moles\times {\text {Molar mass}}=11.7mol\times 44g/mol=514.8g\)

The mass in grams is 514.8.

With four molecules produced by substrate-level kinase and 34 molecules produced by oxidative phosphorylation, the total potential limit yield of ATP produced during the complete cell metabolism of glucose is 38 molecules.

All of a substance's physical and chemical properties can be found in even its tiniest particles. Molecules can be made of one atom or more.

Elements always consist of a single type of atom, whereas molecules can contain a single type of atom or multiple types of atoms. This is the distinction between molecules & elements. For instance, the molecule H2 is composed of just one kind of atom ( Hydrogen). On the other hand, the CO2 molecule is composed of oxygen and carbon.

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The current wave mechanical model of the atom describes electrons in clouds called orbitals that surround the atomic nucleus is based on principles of quantum mechanics .

This model emphasizes the wave-like properties of electrons. In contrast to the earlier Bohr model, which proposed that electrons move in well-defined paths around the nucleus.

The wave mechanical model suggests that electrons do not possess precise trajectories but instead occupy regions of space with varying probabilities. These regions are mathematically represented by wave functions or orbitals.

This model provides a more precise depiction of electron behavior, facilitating a better understanding of phenomena like electron energy levels, electron-electron interactions, and chemical bonding.

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the current wave mechanical model of the atom has electrons in clouds orbitals around the nucleus, on which principle does this phenomenon is based .

Molar mass P2O5 = 31 x 2 + 16 x 5 => 142 g/mol

142 g ---------------- 6.02 x 10²³ molecules

0.930g g ------------ ( molecules )

molecules = 0.920 x ( 6.02 x 10²³ ) / 142

molecules = 5.53 x 10²³ / 142

= 3.89 x 10²¹ molecules

1 molecule P2O5 -------------------------- 7 atoms

3.89 x 10²¹ molecules -------------------- ( atoms )

atoms = ( 3.89 x 10²¹) x 7 / 1

atoms = 2.72 x 10²² atoms of P2O5

2.72 x 10²² atoms of P₂O₅ are there in 0.930 g of  P₂O₅.

Molar mass P₂O₅ = 31 x 2 + 16 x 5 => 142 g/mol

142 g atoms are present in 6.02 x 10²³ molecules

Therefore, total number of molecules in 0.930g of atoms is calculated as-

molecules = 0.930 x ( 6.02 x 10²³ ) / 142

molecules = 5.53 x 10²³ / 142

= 3.89 x 10²¹ molecules

1 molecule of P₂O₅ contains 7 atoms

Therefore, the number of atoms in 3.89 x 10²¹ molecules is calculated as

atoms = ( 3.89 x 10²¹) x 7 / 1

atoms = 2.72 x 10²² atoms of  P₂O₅

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Atoms are the smallest indivisible part of an element while molecules are combinations of two or more atoms. See details below.

Atoms are the smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.

Molecules, on the other hand, are the smallest particle of a specific element or compound that retains the chemical properties of that element or compound. They are two or more atoms held together by chemical bonds.

An element is the simplest chemical substance that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.

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Answer:

What's the gas given in the question??

Answer:

The difference is the louder the sound the bigger the waves and your ears collect the sound waves and brings it to you brain

Explanation:

Answer:

Hey! The correct answer is D.) Different vibrations in the ear cause the brain to interpret different sounds.

Explanation:

I got a low score on the test but yeah I got that one correct so It's D

Answer:

First, we need to determine the molar mass of HCl.

The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.

Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:

6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles

Finally, we can use the molar mass to convert moles to grams:

10 moles x 36.45 g/mol = 364.5 grams

Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.

If the two substituents are on the same side of the double bond, the bond has a cis conformation. From the diagram below, B, D, and E only have the cis configuration.

If the two substituents are on the opposite sides of the double bond, the double bond has a trans configuration. In the context of chemistry, trans denotes that the functional groups (substituents) are on the same side of some plane, whereas cis implies that they are on the other (transverse) side. The same plane contains all six atoms. The cis isomer has two "X" and "Y" groups on the same side of the double bond. In the trans isomer, the "X" and "Y" groups are situated on opposite sides of the double bond. They do not interconvert because there is no rotation around the bond.

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complete question: which of the following compounds are drawn in the cis configuration? 1.D only 2. B only 3. B, D, and E only 4. A and B only

The Safety Data Sheet (SDS) for regular bleach can be obtained from the manufacturer or supplier of the specific brand or product. It contains important information regarding the hazardous properties, handling, storage, and emergency procedures related to the bleach.

An SDS typically includes details such as the product's chemical composition, physical and chemical properties, potential hazards to health and the environment, precautionary measures for safe handling and storage, first-aid procedures, and information about proper disposal. It also provides guidance on personal protective equipment (PPE) to be used when handling the product and steps to take in case of accidental release or exposure.

The SDS serves as a crucial resource for understanding the potential risks associated with the use of regular bleach and helps ensure that appropriate safety measures are implemented. It is important to review and follow the information provided in the SDS to minimize the risk of accidents, injuries, or adverse health effects associated with the use of the product.

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The measure of the length of events and the duration of intervals between events is time.

The duration of events or the gaps between them can be measured, compared, or even ordered using time. The lengthy period of time that the Earth's geologic history takes up is known as geologic time. Starting at the beginning of the Archean Eon  formal geologic time runs until the present. Geology is defined as the "Science of the Earth."

Geology is the fundamental Earth science that examines how the earth created, its structure and composition, and the various forces acting on it. It is sometimes known as geoscience or earth science.

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Answer:

Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element's symbol.

Explanation:

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The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A

In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).

When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.

Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.

In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.

The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A

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The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.

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Answer:

its sodium hydroxide

Explanation:

Answer:

b) empty space

Explanation:

A mechanical cannot travel through empty space. So option (b) is correct.

A mechanical wave is a wave which needs a material medium for its propagation. For example sound, water waves etc . The medium required by the wave can be a solid, liquid or a gas. Empty space doesn't have any medium, so a mechanical wave cannot travel through empty space.