How many moles of sucrose would be in 8. 7L of a 1. 1M solution

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As we know, Number of protons = Atomic Number

So,

And, Atomic mass = Number of protons + Number of Neutrons (N)

therefore ~

Number of Neutrons = 19

The correct answer is C. Hydrocarbons are composed primarily of hydrogen and carbon.

Hydrocarbons are composed primarily of hydrogen and carbon. They are organic compounds made up of only carbon and hydrogen atoms. Hydrogen is the most abundant element in the universe, while carbon is the fourth most abundant element in the universe and is essential for life.

Hydrocarbons are found naturally in fossil fuels such as coal, oil, and natural gas, as well as in living organisms. They play a crucial role in modern society as a source of energy and as raw materials for the production of a wide range of products, including plastics, pharmaceuticals, and fertilizers.

The properties of hydrocarbons depend on their molecular structure and can vary widely, from gases such as methane and propane to liquids such as gasoline and diesel fuel to solids such as paraffin wax.

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Answer: Carbon

K12 quiz test

Answer:

Nucleus

Explanation:

Answer:

False

Explanation:

Solubility refers to the ability of a substance to dissolve in a solvent, usually a liquid. It is a measure of the amount of a substance that can dissolve in a given amount of solvent at a given temperature. Solubility is not related to the ability of a substance to burn.

Answer:

(see below)

Explanation:

Using the process of elimination:

It's not energy radiations because radiation is a way energy is transferred.

It's not energy transmissions because that's the transfer of energy from one medium to another, like the sun to a black construction paper through radiation. There are three ways of transmission: radiation, convection, and conduction.

It's not solutions because a solution is a homogenous mixture where it is uniform in composition and appearance throughout. Also, the term "energy solutions" makes no sense whatsoever.

It's most likely energy transformations because energy transformation, also called energy conversion, is the process of changing energy from one form to another.

Answer:

25

Explanation:

25 because when you divide 50/2 it will be 25m/s

The mass, in metric tons, of carbon in the methane is 1.83 metric tons

From the question, we are to determine the quantity of carbon in the methane

The mass of carbon in the methane can be calculated from

Mass of carbon in the methane = \(\frac{Mass\ of\ carbon\ in\ a\ molecule\ of \ methane}{Mass\ of\ a\ molecule\ of \ methane}\times Total\ mass\ of\ the\ methane\)

Mass of carbon in a molecule of methane = 12 g

Mass of a molecule of methane = 16 g

Therefore,

Mass of carbon in the methane = \(\frac{12}{16} \times 2.44\)

Mass of carbon in the methane = 1.83 metric tons

Hence, the mass, in metric tons, of carbon in the methane is 1.83 metric tons

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Explanation:

At first sight, I could recognize you

As if we were calling for each other

The DNA in my blood vessels tell me

That it’s you I was looking all over for

Answer:

A-battery

Explanation:

A battery has a positive and negative charge which can power a light bulb through the wires as long as the bulb is also connected to the other ends of the wires.

Answer:

6 gallons of gasoline for $14.45 is the best price

Explanation:

26.29/11=2.39 $ per gallon

14.45/11=1.31 $ per gallon

Answer:

Explanation:

Start by restating the question.

So how is the crumple zone rigidity, crumple zone deformation , and the maximum force of the dummy similar, and how are they different?

The crumple zone increases, the crumple zone deformation increases then decreases then repeated in increasing and decreasing , and the maximum force decreases. Hope that helps!

Answer:

ecosystem

Ecosystems include both biotic and abiotic factors

Answer:

Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere.

Therefore, the net ionic equation for the reaction is Copper(2+) (aq) + 2 chlorine- (aq) → Copper(II) chloride (aq).

Ammonium sulphate and Copper hydroxide precipitate are the first products of the reaction between copper sulphate and ammonium hydroxide.

Mixing copper(II) sulphate and ammonium chloride results in the following observations:

Conventional: When copper ions (Copper2+) from Copper(II) sulfate are present, a blue solution develops. The colour of Ammonium Chloride doesn't seem to have changed at all.

Ionic total: While Ammonium Chloride dissociates into Ammonium and Chlorine- ions in solution, Copper(II) sulfate dissociates into Copper2+ and Sulfate 2- ions.

Copper(II) sulfate (aq) + 2 Ammonium Chloride (aq) → Copper(II) Chloride (aq) + 2 Ammonium (aq) + Sulfate 2- (aq)

Net Ionic: The net ionic equation shows only the species involved in the reaction. In this case, the Copper2+ and the Cl- ions combine to form Copper(II) chloride.

Copper2+ (aq) + 2 Chlorine- (aq) → Copper(II) chloride (aq)

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Explanation:

Given the amount of fluorine is ---- 1.25 mol.

What is the mass of given fluorine in grams?

Since

\(Number of moles =\frac{given mass of the substance}{its molecular mass}\)

To get the mass of the substance in grams, multiply the given number of moles with the molecular mass of the substance.

Hence, among the given options, the correct answer is the last option that is

Multiply the atomic mass of fluorine by 1.25.

Answer:

Multiply the atomic mass of fluorine by 1.25.

Explanation:

i got it right on the exam!! :)

A shielded nucleus will have a reduced chemical shift and will absorb upfield from a deshielded nucleus.

The nucleus is the central part of an atom that contains most of its mass and all of its positive charge. It is composed of protons and neutrons, which are held together by a strong nuclear force. The number of protons in the nucleus determines the element that the atom belongs to, while the number of neutrons can vary and give rise to different isotopes of the same element. The properties of the nucleus are essential in determining the behavior of the atom in chemical and physical reactions. Nuclei can also undergo nuclear reactions such as fission and fusion, which release enormous amounts of energy and are the basis for nuclear power and nuclear weapons. The study of nuclei and their properties is known as nuclear physics and is a fundamental area of modern science.

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The pKa of weak acid HA is B. 4.63

How to determine the pKa of a weak acid?

To calculate the pKa of the weak acid HA, given that a solution of 0.65 M HA and 0.85 M NaA has a pH of 4.75, follow these steps:

Step 1. Use the Henderson-Hasselbalch equation:

pH = pKa + log ([A-]/[HA]).

In this case, [A-] = 0.85 M (from NaA) and [HA] = 0.65 M.

Step 2. Plug in the known values: 4.75 = pKa + log (0.85/0.65).

Step 3. Solve for pKa:

Subtract log (0.85/0.65) from both sides:

pKa = 4.75 - log (0.85/0.65) ≈ 4.63.

So the pKa of the weak acid HA is approximately 4.63 (Option B).

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The final temperature of the gas that expands from a volume of 22.4 l at 278k to a volume of 38.3 l will be 475 K.

The volume as well as Kelvin temperature will be directly proportional whenever the pressure on even a sample of such a dry gas remains held constant. PV = k would be the law's equation.

Charle's law give the relation between the temperature and volume is shown as:

\(V_{1} / T_{1} = V_{2} / T_{2}\)

where. V is volume and T is temperature.

Given data :

\(V_{1} =22.4 l\\V_{2} = 38.3 l\\T_{1} = 278 K\\T_{2} = ?\)

Put the value of given data in above equation.

22.4 l /   38.3 l = 278k / \(T_{2}\)

\(T_{2}\) = 475 K.

Therefore, the final temperature will be 475 K.

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To calculate the heat energy absorbed by the water, we can use the formula:

Q = mcΔT

Where Q is the heat energy absorbed, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.

First, we need to calculate the mass of the water in the top 1 cm of the area:

Volume of top 1 cm of water = 1 cm x 100 km x 100 km = 1 x 10⁸ m³

Density of water = 1000 kg/m³

Mass of water = Volume x Density = 1 x 10⁸ m x 1000 kg/m³ = 1 x 10¹¹ kg

Next, we can calculate the heat energy absorbed using the specific heat capacity of water (4.184 J/g°C):

ΔT = 27°C - 25°C = 2°C

Q = (1 x 10¹¹ kg) x (4.184 J/g°C) x (2°C) = 8.368 x 10¹¹ J

Therefore, the water in the top 1 cm of the 100 km by 100 km area has absorbed approximately 8.368 x 10¹¹ joules of heat energy.

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Answer:

Isotope 2

Explanation:

Isotope 2 is the most abundant. Its percent abundance is 78.68% which is the largest percentage, and therefore the most common of the isotopes presented.

Good luck!

According to superposition principle of rocks the oldest sedimentary rock layer is in the bottom and the youngest will be the upper layer.

One of the geological laws that geologists use to calculate the relative ages of rock strata, or layers, is the law of superposition. According to this theory, rock layers are stacked or deposited one on top of the other. The bottom will have the oldest rock strata and the top will have the youngest.

Earlier rocks, which were horizontally deposited over the older layers, are buried deeper in the planet than younger ones. This now widely accepted idea, which is also known as the Law of Superposition, is regarded as a fundamental rule of geology.

Long before the technology existed to compute the precise ages of rocks, geologists were able to use this principle to identify the oldest rock layers.

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Answer:

0.17 mol

Explanation:

Given data:

Number of atoms of Ar gas = 1.02×10²³ atom

Number of moles = ?

Solution:

The given problem will solve by using Avogadro number.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

1.02×10²³ atom × 1 mol / 6.022 × 10²³ atoms

0.17 mol

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The answer is b. NaCl

The compound that contains an ionic bond is:

b. NaCl

NaCl is composed of sodium cations (Na+) and chloride anions (Cl-), which are held together by electrostatic forces of attraction between opposite charges. This is an example of an ionic bond, where electrons are transferred from one atom to another to form ions with opposite charges.

The other compounds listed are not ionic:

a. O2 is a molecule composed of two oxygen atoms held together by a covalent bond, where electrons are shared between the atoms.

c. CCl4 is a molecule composed of one carbon atom and four chlorine atoms held together by covalent bonds.

d. HCl(g) is a molecule composed of one hydrogen atom and one chlorine atom held together by a covalent bond.

e. SO2 is a molecule composed of one sulfur atom and two oxygen atoms held together by covalent bonds.

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A star evolves off the main sequence when helium is exhausted in the stellar core.Our solar system’s gas giant planets (and those of other solar systems) did not become stars because they are not massive enough to generate the high temperatures and pressures necessary to start hydrogen fusion in the core.

Stars evolve off the main sequence when the nuclear fusion in their cores is no longer capable of supplying sufficient energy to maintain the gravitational energy, causing it to contract and the outer layers to expand and cool. When hydrogen runs out in the core of a star, the core shrinks and heats up and the outer layers expand, resulting in a red giant. However, when helium is consumed in the core, the core collapses and heats up, causing the outer envelope to get expelled, and the core evolves into a white dwarf.

A gas giant planet's temperature and pressure aren't high enough to generate fusion. They aren't dense enough to generate the heat required for nuclear fusion. Therefore, gas giant planets do not generate their own light and heat in the same way as stars. They can emit more energy than they obtain from the sun if they have a significant atmosphere. The planets in the solar system, such as Jupiter and Saturn, are examples of gas giants.

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To identify whether a chemical shift has taken place or not, the boiling point of sugar must be known.

Which is a chemical change ?

A chemical change occurs when one chemical substance is changed into one or more distinct chemicals, like when iron is changed into rust. Chemical changes are brought about by the process of chemical reactions, and the substances that are produced have varied qualities because of the diverse ways that their atoms and molecules are structured.

If sugar is dissolved in water in a glass, we can evaporate the water to return to the solid sugar inside the container. This is a phase transition, which is a physical alteration. A phase change occurs when the new substance's condition or form changes.

In the beaker, sugar will re-crystallize at a significantly higher temperature of roughly 320°F rather than boiling. The water in the beaker will eventually reach its boiling point as the temperature rises and begin to evaporate as steam. In the meantime, the bottom of the solution will start to crystallize again with the sugar.

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