5.00 g of glucose, C6H12O6, is dissolved in 72.8 g of water. What will be the freezingpoint and the boiling point?

The compound is 1- ethyl, 2,2,3,3 tetramethyl cyclopropane

The proper way to name a cyclic compound depends on the number of carbon atoms in the ring and the functional groups attached to it. Here are some general guidelines to follow:

Identify the longest continuous chain of carbon atoms in the cyclic compound. This will be the "parent" chain of the molecule.

Number the carbons in the parent chain so that the carbon atoms in the ring have the lowest possible numbers. If there are two or more possible numbering schemes, choose the one that results in the lowest numbers for the functional groups.

Name any substituents attached to the ring using the appropriate prefix and position number. If there are multiple substituents, list them alphabetically before the parent chain name.

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Answer:

The mitochondria

Explanation:

Its where cellular respiration occurs

Answer:

Question 5: 127.2

The molar ratio between CH4 and C is 1:1

10.6 x 12 = 127.2 grams

Question 10: 5.9

The molar ratio between H(NO3) and Mg(NO3)2 is 2:1

5/63 = 0.0794 moles of H(NO3)

(.0794 / 2) x 1 = 0.0397 moles of Mg(NO3)2

.0397 x 148 = 5.9 grams of Mg(NO3)2

Question 6: 14.0

The molar ratio between CuO and N2 is 3:1

118.1 / 78.5 = 1.504 moles of CuO

(1.504 / 3) x 1 = .501 moles of N2

.501 x 28 = 14.0 grams of N2

1.Chemical reactions

2. Mass ratios

3. Atomic theory

4. Atoms

5. Combine

6. rearrange

7. Destroyed

8. Divided

The atomic theory is a scientific description of the nature of atoms and matter.

The Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.

After years of studying Chemical reactions, Dalton was able to accurately determine the mass ratios of the elements involved in the reactions. His conclusions resulted in the atomic theory, which helped to explain that atoms in chemical reactions separate, combine or rearrange, but are not created, destroyed, or divided.

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Answer:

177.3kg C₂₁H₄₄

Explanation:

Based on the chemical reaction:

C₂₁H₄₄ → 3C₂H₄ + C₁₅H₃₂

Where 1 mole of C₂₁H₄₄ produce 3 moles of ethene, C₂H₄.

To solve this question we need to determine the moles of ethene in 50.4kg. 1/3 these moles are the moles of C₂₁H₄₄ that must be added:

Moles Ethene -Molar mass: 28.05g/mol-

50.4kg = 50400g * (1mol / 28.05g) = 1796.8 moles of ethene

Moles C₂₁H₄₄:

1796.8 moles of ethene * (1 mol C₂₁H₄₄ / 3 mol C₂H₄) = 589.93 moles C₂₁H₄₄

Mass C₂₁H₄₄:

589.93 moles C₂₁H₄₄ * (296g / mol) = 177283g =

Answer:

A reactant is a substance that is present at the start of a chemical reaction. A product is a substance that is present at the end of a chemical reaction.

Explanation:

The Ka value for HF(aq) is 0.002 M^2, indicating that it is a weak acid.

To calculate the Ka for the acid HF(aq) and determine if it is a strong or weak acid, we need to use the equilibrium concentrations of the species involved.
The equation for the dissociation of HF(aq) is: HF(aq) ⇌ H+(aq) + F-(aq)
Given the equilibrium concentrations of each species, we can set up an expression for the equilibrium constant, Ka:
Ka = [H+(aq)] * [F-(aq)] / [HF(aq)]
Let's assume the concentrations are as follows:
[H+(aq)] = 0.01 M
[F-(aq)] = 0.02 M
[HF(aq)] = 0.1 M
Now, we can substitute these values into the Ka expression:
Ka = (0.01 M) * (0.02 M) / (0.1 M)
Ka = 0.002 M^2
To determine if the acid is strong or weak, we compare the value of Ka to known values for strong and weak acids. Strong acids have Ka values that are significantly larger than 1, while weak acids have Ka values that are smaller than 1.
In this case, since the value of Ka is 0.002 M^2, which is smaller than 1, we can conclude that HF(aq) is a weak acid.

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Answer:

Confirmation of the rate expression does not prove the mechanism is correct. The rate expression only tells us the order of the reaction, but it does not tell us the mechanism. The mechanism is the step-by-step process by which the reaction occurs. There are many different mechanisms that can give the same rate expression. For example, the reaction A + B -> C can have the following two mechanisms:

A + B -> AB* -> C

A + B -> [AB] -> C

Both of these mechanisms have the same rate expression, but they are different mechanisms. The first mechanism is a two-step mechanism, and the second mechanism is a one-step mechanism.

In order to prove the mechanism is correct, we need to gather experimental evidence that supports the mechanism. This evidence can come from a variety of sources, such as kinetic studies, product analysis, and spectroscopic studies.

Explanation:

The species that has two more neutrons than electrons are ₂₀⁴⁰Ca²⁺ and ₁₁²³Na⁺  has two more neutrons than electrons; option C and D

The fundamental particles in an atom are the particles which make up the atom.

An atom is composed of three fundamental particles:

The number of protons in atom is the atomic number of the element.

The number of neutrons in atom is the difference between the mass number and atomic number of the atom.

For the given species;

₃⁶Li⁺:

number of protons = 3;

number of neutrons = 6 - 3 = 3

number of electrons = 3 -1 = 2

₄⁹Be²⁺:

number of protons = 4;

number of neutrons = 9 - 4 = 5

number of electrons = 4 -2 = 2

₁₁²³Na⁺:

number of protons = 11

number of neutrons = 23 - 11 = 12

number of electrons = 11 -1 = 10

₂₀⁴⁰Ca²⁺:

number of protons = 20

number of neutrons = 40 - 20 = 20

number of electrons = 20 -2 = 18

Therefore, ₂₀⁴⁰Ca²⁺ and ₁₁²³Na⁺  has two more neutrons than electrons.

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Answer:

Very fast

Explanation:

The correct answer is B. Metalloids

Explanation:

In this periodic table, the green boxes include elements such as Boron (B), Arsenic (As), and Antimony (Sb). All these elements are known in chemistry as semimetals or metalloids. This classification is because these elements cannot be completely classified into metals or non-metals. Moreover, they all display similar properties including some level of conductivity, malleability, and solid-state. According to this, the correct answer is B.

Answer:

B. Metalloids

Explanation:

The molar mass of the product gas is 12.061 g/mole. This is determined by using the concept of  Graham's law of effusion.

According to  Graham's law of effusion.

rate1 / rate2  = \(\sqrt{(MM2 / MM1 )}\)

where, rate1 is the rate of effusion of first gas and  rate2 is the rate of effusion of second gas , MM1 is the molar mass of first gas and MM2 is the molar mass of second gas.

According to the given problem,

rate of effusion of unknown gas(rate1 ) / rate of effusion of CO2 (rate2 )  = 1.91

And, we know that, MM2  = molar mass of CO2 = [12+ (2*16)] g/mol = 44 g/mole

We need to find out MM1 (molar mass of unknown gas)

Putting these values in the Mathematical Formula, we get,

1.91 = \(\sqrt{(44g/mol / MM1 )}\)

(1.91)2 = 44g/mole / MM1

MM1  = (44 g/mole ) / 3.6481  = 12.061 g/mole

The molar mass of the product of gas calculated is 12.061 g/mole.

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In 0.75 moles of caffeine, there are a total of 6 carbon atoms, 7.5 hydrogen atoms, 3 nitrogen atoms, and 1.5 oxygen atoms.

To determine the total number of atoms in 0.75 moles of caffeine, we need to consider the molecular formula of caffeine, which is C8H10N4O2. The molecular formula provides the ratios of each element present in the compound. By multiplying the number of atoms in each element by the corresponding coefficient in the molecular formula, we can calculate the total number of atoms. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms in each molecule of caffeine. Multiplying these values by 0.75 moles will give us the total number of atoms in 0.75 moles of caffeine.

The molecular formula of caffeine, C8H10N4O2, provides the number of atoms for each element present in one molecule of caffeine. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms.

To calculate the total number of atoms in 0.75 moles of caffeine, we need to multiply the number of atoms for each element by the coefficient in the molecular formula, and then multiply that by the number of moles (0.75 moles).

For carbon (C): 8 atoms x 0.75 moles = 6 atoms (since there are 8 carbon atoms in one molecule of caffeine).

For hydrogen (H): 10 atoms x 0.75 moles = 7.5 atoms (since there are 10 hydrogen atoms in one molecule of caffeine).

For nitrogen (N): 4 atoms x 0.75 moles = 3 atoms (since there are 4 nitrogen atoms in one molecule of caffeine).

For oxygen (O): 2 atoms x 0.75 moles = 1.5 atoms (since there are 2 oxygen atoms in one molecule of caffeine).

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Answer:

Total gram of Ca = 99.26 g

Explanation:

Given:

Mass of CaCl₂ = 277.45 g

Find:

Mass of Ca

Computation:

Ca = 40 g/mol

Cl₂ = 2 (35.5) g/mol = 71 g/mol

Total CaCl₂ = 111 g/mol

Total gram of Ca = [40 / 111] 277.45 g

Total gram of Ca = 99.26 g

Answer:

C

Explanation:

Parallel makes the shadow happen every month

  non parallel would be less frequent

He should make the Moon orbit Earth at an angle to the table, and not parallel. So, the correct option is C.

The curving path that an object in space takes around another object as a result of gravity is known as an orbit. Moons orbiting planets, planets orbiting planets, and artificial satellites orbiting the Earth are examples of objects where this is frequently seen.

A route that an object in space follows around another is known as an orbit. A satellite is a thing that orbits the earth. An Earth- or moon-like natural satellite is one possibility. Moons are satellites that orbit many planets. A man-made satellite is also possible, such as the International Space Station.

The solar system's planets, comets, asteroids, and other celestial bodies revolve around the sun. The majority of solar system objects travel along or very near a hypothetical flat surface. The ecliptic plane is the name given to this hypothetical plane.

Therefore, the correct option is C.

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Answer:

it wont let me leave I didnt mean to click sorry

Answer: Well,diffusion does not happen in solids because the particles are not free to move around and so they cannot inter-mix.

Answer:

B. each aquarium . . . the surroundings

Explanation:

Since the Final tempurature is less than the original. Both aquariums released thermal energy

Answer:

b

Explanation:

Earth's atmosphere is composed of multiple layers of gases surrounding earth. So the correct option is B.

The atmosphere of Earth extends from the planet's surface up to 10,000 kilometres (6,214 miles) above. Following that, the atmosphere disappears into space. Although there is disagreement among scientists on the location of the atmosphere's upper border, most of them can agree that the atmosphere's majority is found near the planet's surface, up to a distance of around eight to fifteen kilometres (five to nine miles).

While most life on Earth requires oxygen, oxygen does not make up the bulk of the planet's atmosphere. About 78% of the gases in the Earth's atmosphere are nitrogen, 21% are oxygen, 0.9 % are argon, and 0.1 % are other gases. The remaining 0.1 per cent of gases includes trace quantities of neon, water vapour, methane, carbon dioxide, and methane.

Based on temperature, the atmosphere is separated into five distinct strata. The troposphere, which is located between five and ten miles (or seven and 15 kilometres) above Earth's surface, is the layer that is closest to the surface. The troposphere is significantly thinner near the North and South Poles than it is at the equator. The troposphere, which makes up between 75 and 80 per cent of the total atmosphere, is where the majority of its mass is located.

Therefore the correct option is B.

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An iceberg has a volume of 7670 cubic feet. The mass of the ice (in kg) composing the iceberg is 0.0002483 kg

The volume of iceberg = 7670 cubic feet.

Density of ice = 0.917 g/cm\(^{3}\)

so, Density is given by,

Density = mass / volume

density of ice =  (0.917 /1000) kg/cm\(^{3}\)

1 cm\(^{3}\) = 0.00003531 ft\(^{3}\)

therefore,

0.000917 kg/cm\(^{3}\) = (0.000917 × 0.00003531 ) kg/ft\(^{3}\)

                            = 0.0000000324 kg/ft\(^{3}\)

now,putting the values in formula , we get,

Density = mass / volume

mass = density × volume

         = (0.0000000324 × 7670 ) kg

         = 0.0002483 kg

Hence,An iceberg has a volume of 7670 cubic feet. The mass of the ice (in kg) composing the iceberg is 0.0002483 kg.

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If Half- life of an isotope is 30 days and it was assumed that the person ate 100 Bq of isotope, there are 50 transformations in the stomach.

The radioactive decay of a sample of an isotope can be characterized by the half-life of that isotope. When a radioisotope undergoes decay, its nucleus becomes unstable, and it emits particles or energy to become more stable. The half-life of an isotope is the time it takes for half of the original sample to decay. The question states that the half-life of an isotope is 30 days, and the person ingested 100 Bq of isotope. It also says to calculate the number of transformations in the stomach using GI track model information .

Since the isotope has a half-life of 30 days, we can use the following formula to find the number of transformations in the stomach:` N = N₀ (1/2)^(t/T₁/₂)`where: N₀ = initial number of nuclei N = final number of nuclei (after time t)T₁/₂ = half-life of the isotope The isotope has a half-life of 30 days, so T₁/₂ = 30 days. The question doesn't specify how long the person has had the isotope in their stomach, so we'll assume it's been there for one half-life, or 30 days. Therefore, t = 30 days.

Substituting into the formula:` N = 100 (1/2)^(30/30)`Simplifying:` N = 100 (1/2)^1`Evaluating:`N = 50`So after 30 days in the stomach, the person would have 50 Bq of the isotope left. Therefore, the number of transformations in the stomach is the difference between the initial number of transformations (100 Bq) and the final number of transformations (50 Bq):`Number of transformations in stomach = 100 - 50 = 50 transformations. Therefore, there are 50 transformations in the stomach.

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Answer:

Forensic drug chemists analyze samples of unknown materials including powders, liquids and stains to determine the chemical identity or characteristics of the compounds that make up the sample. samples submitted as evidence in a drug-related case can contain one compound or a mixture of many compounds.

Answer:

D

Explanation:

the production of an odor would indicate that the heat ignited a chemical reaction

The correct answer to the question is:

If the substance is a liquid or solid, production of an odor would indicate a chemical change

A chemical change is a change which is not easily reversible and in which a new substance. For example burning of substance, decay of substance etc

A physical change is a change which is easily reversible and no new substance is form. For example change of states of matter.

With the above information in mind, we can see that the correct answer to the question is:

If the substance is a liquid or solid, production of an odor would indicate a chemical change

All other options represent a physical state.

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Answer:

this is difficult but simple to answer

Explanation:

all atoms move in 1 direction no more than 2

(a) qsys: impossible to determine

(b) ΔEsys: 0

(c) ΔEuniv: inconclusive

What is the determination of the changes in qsys, ΔEsys, and ΔEuniv during the phase change?

In the given information, the circles represent a phase change occurring at constant temperature. However, the information provided does not allow us to determine the value of qsys, which represents the heat transfer to or from the system. Without additional data, we cannot ascertain whether heat is being added or removed from the system.

Regarding ΔEsys, which represents the change in internal energy of the system, it is determined to be zero. This indicates that there is no change in the system's internal energy during the phase change occurring at constant temperature.

Lastly, the value of ΔEuniv, which represents the change in the total energy of the system and its surroundings, is inconclusive based on the given information. Without further details, it is not possible to determine whether the phase change results in a change in the total energy of the system and its surroundings.

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Answer:

where are the object

Explanation:

can you have a look at your question