HOMOGENEOUS VS.
HETEROGENEOUS MATTER
Classify the following substances and mixtures as either homogeneous or heterogeneous.
Place a ✔️ In the correct column.
HOMOGENEOUS
1. flat soda pop
2. cherry vanilla ice cream
3. salad dressing
4. sugar
5. soil
6. aluminum foil
Name
7. black coffee
HETEROGENEOUS

Answer:0.2496m³/day

Explanation:

Answer:

Explanation:

It's water vapor. There is enough heat present to get the water to boil but not enough to break it into its chemical components (oxygen and hydrogen), so the answer is D.

Among U, H, A, and G, the term which can be directly used to determine whether a system is in equilibrium is G.

G is the Gibbs free energy which helps in determining the stability of a system. A system is said to be at equilibrium when its Gibbs free energy (G) is minimum or when there is no free energy available for doing work.

During the chemical reaction, if the Gibbs free energy is negative, the reaction is spontaneous and if it is positive, the reaction is non-spontaneous.

The Gibbs free energy is directly proportional to the degree of randomness (entropy) and inversely proportional to the degree of order (enthalpy).

For a spontaneous process, the Gibbs free energy (G) of the system must be negative. This means that for a system to be at equilibrium, ΔG = 0.

So, the change in Gibbs free energy (ΔG) can be used to determine the spontaneity of a reaction.

Thus, among U, H, A, and G, the term which can be directly used to determine whether a system is in equilibrium is G.

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The analogous species of the elements in period 3 can be determined by examining their positions in the periodic table and their similarities in electronic configuration and chemical properties.

Here are the formulas for the analogous species of the elements in period 3:

Sodium (Na) - Analogous Species: Magnesium (Mg)

Formula: Mg

Magnesium (Mg) - Analogous Species: Aluminum (Al)

Formula: Al

Aluminum (Al) - Analogous Species: Silicon (Si)

Formula: Si

Silicon (Si) - Analogous Species: Phosphorus (P)

Formula: P

Phosphorus (P) - Analogous Species: Sulfur (S)

Formula: S

Sulfur (S) - Analogous Species: Chlorine (Cl)

Formula: Cl

Chlorine (Cl) - Analogous Species: Argon (Ar)

Formula: Ar

Each of these analogous species in period 3 exhibits similar electronic configurations and shares some chemical properties.

However, it's important to note that the properties of these elements also vary due to the progressive filling of electron shells and the transition from metals to nonmetals across the period.

Please note that these formulas represent the elemental forms of the analogous species.

The elements can combine with other elements to form various compounds and molecules, resulting in different chemical formulas.

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The mass, in grams, of the sample of methanol (CH₃OH) is 64 grams.

Mass of any substance can be calculated by using moles as:

n = W/M, where

W = required mass

M = molar mass

In the question that:

Moles of methanol = 2mole

Molar mass of methanol = 32g/mole

On putting these values in the above equation, we get

W = n × M

W = 2mole × 32g/mole = 64g

Hence, 64 grams is the mass of the sample.

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The Lewis structure is a simplified representation of the valence shell electrons in a molecule. It is used to show how electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or to connect electrons as a line between two atoms.

1) Ethyl acetate: \(C_{4}H_{8}O_{2}\)

Ethyl acetate is a widely used solvent, especially for paints, varnishes, lacquers, cleaning compounds, and perfumes. Like last week's MOTW, dichloromethane, is used as a solvent to reduce coffee grounds. In the laboratory, ethyl acetate is a common solvent for column and thin layer chromatography.

2. Acetaminophen:

Acetaminophen is an active ingredient in hundreds of over-the-counter (OTC) and prescription medications. It relieves pain and fever. Acetaminophen can also be combined with other active ingredients in medications that treat allergies, coughs, colds, flu, and insomnia. In prescription  acetaminophen is found along with other active ingredients to treat severe pain. Acetaminophen can cause serious liver damage if used more than prescribed. The FDA has taken action to improve consumer safety when using acetaminophen.

3) Phenacetin:

Phenacetin has been used as an analgesic and antipyretic in both human and veterinary medicine for many years. It was introduced in treatment in 1887 and was widely used in analgesic mixtures until it was included in kidney diseases (nephropathy) due to the abuse of analgesics. Phenacetin was also once used as a stabilizer for hydrogen peroxide in hair bleaching preparations.

4-Caffeine

Caffeine is a stimulant, which means it increases activity in your brain and nervous system. Caffeine also increases the circulation of chemicals in the body like cortisol and adrenaline. In small doses, caffeine can make you feel relaxed and focused.

5.Aspirin

Aspirin is a common medicine to relieve minor aches, pains, and fever. Also, people use it as an anti-inflammatory or blood thinner.

Aspirin can buy by people can buy  over the counter without a prescription. Daily benefits include relieving headaches, reducing inflammation, and reducing fever.

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Answer:

A

Explanation:

Well, the human skeletal system produce red blood cells into and for the body.

An anatomical feature that allows continuous recording of earthworm electrical activity is the electrical connections between fibers.

Earthworms are ideal for studying action potential conduction velocities in the classroom. This is because the simple linear anatomy makes it easy to measure axonal length, and the sparse coding of worms makes it easy to identify individual action potentials. Earthworms have two giant fiber systems (outer and inner) with different conduction velocities that can be easily measured by manipulating electrode placement and tactile stimulation. Here we present a portable and robust experimental setup that allows a student to measure line speed within her 30-minute to her 1-hour lab session. learns how to measure the conduction velocity of nerve action potentials using earthworm specimens and presents a basic electrophysiology laboratory setup to amplify and record nerve data using a simple amplifier and laptop to do.

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Answer:

the answer is D

Explanation:

Answer: many molecular collisions occurring quickly

Explanation: just took the test

Answer is D

Explanation:

Answer:

B. Neutral

Explanation:

When there is a ionic bond,  one element steals or takes away an electron from the other element.

An example is NaCl

In this compound, Chlorine atom steals an extra electron from Sodium to fill its outer shell. So, this is a Ionic bond. Since, the Sodium compound gives away an atom, it is positively charged. Since, Chlorine steals an atom, it is negatively charged. Opposite charges attract, so they become a compound.

When positive and negative mix, it becomes neutral.

The strength or power. Think about the situation when the force is 10 N in the east. The direction is indicated by "towards east," while the force's strength is indicated by "10".

Balanced forces don't move things around. the forces acting on the box would be balanced, the box would not move. Due to the fact that an object will be elevated when two equal forces act on it, the box will be raised. Because of Newton's First Law of Motion, the box would move in the direction of the force that was applied last.

The net force is the sum of the two forces acting on an object when they do so in the same direction. In this instance, the combined force is always greater than the sum of its components.

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1. The magnitude of a force refers to the amount or strength of the force, typically measured in units such as newtons or pounds.

Force is a physical quantity that describes the interaction between two objects or between an object and its surroundings. It is defined as any influence that can change the motion of an object or cause an object to accelerate. Force can be described by its direction, magnitude, and point of application. Force can be represented by vectors, which means that they have both a magnitude and a direction. Some common examples of force include gravity, friction, and electromagnetism. The SI unit of force is the newton (N), which is defined as the force required to give a mass of one kilogram an acceleration of one meter per second squared.

2. The result can be explained by the fact that the forces are balanced, meaning they are equal in magnitude and opposite in direction, resulting in no net force on the box.

3. The distance the ball will travel depends on various factors such as the strength of the kick, the angle at which it is kicked, and the air resistance. However, in general, a stronger kick corresponds to a greater magnitude of force, which can result in the ball traveling farther.

4. The magnitude of the total force is greater than the magnitude of each of the individual forces when the forces are acting in the same direction. For example, if two people are pushing a heavy object in the same direction, the total force will be the sum of their individual forces, resulting in a greater magnitude of force.

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Answer:

Law of superposition

4 million

Explanation:

Answer:

the law of superposition and 4 million

Explanation:

Answer:

7.0 times 10 to the -17th power

Explanation:

Answer: 16 g/mol

Explanation: Molarity is Moles/Liters or Mol/L

(0.50 mol/L)(1.30L) = 0.65mol

(cancels out L)

Molar mass is g/mol so...

10.5g/0.65mol = 16.1 g/mol

Rounded to 2 sig figs is 16 g/mol

Answer: The heat flows into Earth's atmosphere which changes as the Sun rises and sets, which increases during the day.

Explanation:

Answer:

30 moles of CO₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Al₂(CO₃)₃ —> Al₂O₃ + 3CO₂

From the balanced equation above,

1 mole of Al₂(CO₃)₃ decomposed to produce 3 moles of CO₂.

Finally, we shall determine the number of mole of CO₂ produced from the decomposition of 10 moles of Al₂(CO₃)₃. This can be obtained as follow:

From the balanced equation above,

1 mole of Al₂(CO₃)₃ decomposed to produce 3 moles of CO₂.

Therefore, 10 moles of Al₂(CO₃)₃ will decompose to produce = 3 × 10 = 30 moles of CO₂.

Thus, 30 moles of CO₂ were obtained from the reaction.

30 moles of CO₂ will be produced by the decomposition of 10 moles of  \(\rm Al_2(CO_3)_3\).

Carbon dioxide is a gas made up of two elements, carbon, and oxygen.

It is the gas that is used by plants to make their food.

The % of this gas on Earth is 0.03%

The balanced equation is

\(\rm Al_2(CO_3)_3 \longrightarrow Al_2O_3 + 3CO_2\)

1 mole of \(\rm Al_2(CO_3)_3\) decomposes to produce 3 moles of CO₂.

If 1 mole of \(\rm Al_2(CO_3)_3\) produce 3 moles of CO₂, then decomposition of 10 moles of \(\rm Al_2(CO_3)_3\) will produce

3 × 10 = 30 moles of CO₂.

Thus, 30 moles of CO₂ will be produced by the decomposition of 10 moles of  \(\rm Al_2(CO_3)_3\).

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Answer:

Some theories say that there is only one universe and that everything is inside the universe and there is nothing outside the universe but some other theories say that there are more Universes which has the opposite copy of all the planets in our universe.

For every mole of NaN3 that is broken down, one mole of N2(g) is produced. Using the molar mass of NaN3, which is 68.99 g/mol, we can determine how many moles of NaN3 are present given that we have 50.0 g of the substance.

We get 0.724 mol of NaN3 by dividing 50.0 g by 68.99 g/mol. We can determine that 0.724 mol of NaN3 will result in 0.724 mol of N2(g) since 1 mole of NaN3 yields 1 mole of N2(g). We may use the molar mass of N2(g), which is 28.02 g/mol, to determine the mass of N2(g) produced.

0.724 mol is multiplied by 28.02 g/mol to yield 20.3 g of N2(g). Therefore, 20.3 g of N2(g) will be created from 50.0 g of NaN3.

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Explanation:

Since, the boulder is at rest. This means that there is an equilibrium of forces acting on the boulder.

According to principle of equilibrium of forces a body can be in position of rest only when net force acting on body is zero for translation equilibrium and net moment acting on the body must also be zero for rotational equilibrium.

Therefore, net forces and net moment acting on the boulder is zero.

A)Acid Dissociation Reactions of Oxalic Acid. The ionization constant (Ka) of oxalic acid is given by the reaction:H_{2}C_{2}O_{4 }+ H_{2}O ⇌ H_{3}O+ + HC_{2}O_{4-}.

B)The equilibrium constant for the basic dissociation of a conjugate base is given by Kb. Kb values are the opposite of Ka values (Kb = Kw/Ka) and are also used to compare the strength of a base's conjugate acid.

A) Acid Dissociation Reactions of Oxalic Acid. The ionization constant (Ka) of oxalic acid is given by the reaction:H_{2}C_{2}O_{4 }+ H_{2}O ⇌ H_{3}O+ + HC_{2}O_{4-}; Ka1 = 5.90 × 10-2 The reaction above describes the primary ionization of oxalic acid, where one of the two acidic hydrogen ions (protons) is lost. The loss of the second hydrogen ion is given by the second equilibrium:H_{2}C_{2}O_{4 }+ H_{2}O ⇌ H_{3}O^{+}+ C_{2}O_{4}^{2-}; Ka2 = 6.40 * 10^{-5} Oxalic acid is a diprotic acid, implying that it has two dissociable protons. It can thus release two protons when dissolved in water. The stronger the acid, the weaker its conjugate base, which means that the conjugate base of the first equilibrium is stronger than that of the second equilibrium.

B) Base Reaction with Water for Each Conjugate BaseThe corresponding base reactions with water for the conjugate bases are:H_{2}C_{2}O_{4 }+ H_{2}O ⇌ H_{3}O+ + HC_{2}O_{4-}; Ka1 = 5.90 * 10-2 H_{2}C_{2}O_{4 }+ H_{2}O ⇌ H_{3}O^{+}+ C_{2}O_{4}^{2-}; Ka2 = 6.40 × 10-5.The equilibrium constant for the basic dissociation of a conjugate base is given by Kb. Kb values are the opposite of Ka values (Kb = Kw/Ka) and are also used to compare the strength of a base's conjugate acid.

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Answer:

salad

Explanation:

Prairie dogs are a type of squirrels and they are classified in the group of rodents. The family of prairie dog is Sciuridae.

The taxonomical classification of an animal is to indicates its kingdom, phylum, class, order,  family, genus and species. All the known animals, plants and other livings are classified to these 7 categories.

The prairie dogs are ground squirrels usually seen in the prairie grass lands. They are in the mammalian class and in the order of Rodentia.

They are classified  to the family of Sciuridae.

Genus of prairie dogs is cynomys and their species can be of various types such as ludovicianus, gunnisoni, mexicanus etc based on the regions they reside.

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Answer:

d) H2SO3

Explanation:

The Arrhenius theory defines an acid as a substance that releases H+ ions in aqueous solution. Also among the options listed, H2SO3 is the only acid present, you can tell due to the fact that it's leading with an H. However, not all acids lead with an H, like Acetic Acid CH3COOH (Choo Choo Acid helps me remember it) ends with an H.

Here's a description of each compound.

a) NH2CH3: Methylamine, a weak base.

b) CH3CH3: Ethane, a hydrocarbon and not an acid or base.

c) KOH: Potassium hydroxide, a strong base.

d) H2SO3: Sulfurous acid, a weak acid.

e) LiOH: Lithium hydroxide, a strong base.

Hope this helps!

Using significant figures and rounding up, the resulting mass is 80.5 g.

When using addition or subtraction, the total number of significant figures is relevant. Instead, the last significant figure of every number is considered.

In 30.05, the last significant figure is 5, and it is in the hundredths. In 50.0, the last significant figure is 0, and it is in the tenths. Finally, in 0.4006, the last significant figure is 6, and it is in the ten thousandths. Of the three, the 0 from 50.0 is in the "highest" position, and so the last significant figure of the results should also be in the tenths.

If we add the numbers up, we get:

30.05 g + 50.0 g + 0.4006 = 80.4506 g

Because the last significant figure should be in the tenths, we are going to round up 4 to 5, because trailing numbers are greater than 0, so the final mass will be 80.5 g.

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Answer:

2

Explanation:

Answer:

a

Explanation:

i just took it

Answer:

Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes.

Explanation:

To synthesize phenylacetic acid (C6H5CH2CO2H) from benzene, follow these steps: 1. Use the reagent "Mg/dry ether" to perform a Grignard reaction with benzene, forming a phenyl magnesium halide.

2. React the phenyl magnesium halide with "CO2" to form a carboxylate salt. 3. Add "H3O+" to hydrolyze the carboxylate salt, resulting in phenylacetic acid. To synthesize m-nitrobenzoic acid from benzene, follow these steps: 1. Use the reagent "Cl2/FeCl" to chlorinate the benzene, forming chlorobenzene. 2. React chlorobenzene with "NaCN" in a nucleophilic substitution reaction to replace the chlorine with a cyano group, forming benzonitrile.

3. Hydrolyze benzonitrile with "NaOH/H2O" followed by "H3O+" to form m-aminobenzoic acid.
4. Finally, nitrate the m-aminobenzoic acid using "HNO3/H2SO4" to form m-nitrobenzoic acid.

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a)You should add approximately 2.16 grams of solid sodium carbonate to the 125 mL volumetric flask to prepare a 0.164 M solution.

b)The molarity of the iron(III) bromide solution is approximately 0.303 M.

To prepare a 0.164 M aqueous solution of sodium carbonate using a 125 mL volumetric flask, you need to calculate the amount of solid sodium carbonate required.

Molarity (M) is defined as moles of solute per liter of solution. Therefore, to calculate the amount of solid sodium carbonate (in moles) needed, we can use the following equation:

moles = Molarity × Volume (in liters)

moles = 0.164 M × 0.125 L

moles ≈ 0.0205 mol

Since the molar mass of sodium carbonate (Na2CO3) is approximately 105.99 g/mol, we can calculate the mass of solid sodium carbonate needed using the equation:

mass = moles × molar mass

mass ≈ 0.0205 mol × 105.99 g/mol

mass ≈ 2.16 g

Therefore, you should add approximately 2.16 grams of solid sodium carbonate to the 125 mL volumetric flask to prepare a 0.164 M solution.

For the second part of the question:

Given that 22.4 g of iron(III) bromide is dissolved in a volumetric flask and water is added to reach a total volume of 250 mL (0.250 L), we can calculate the molarity of the solution.

Molarity (M) is defined as moles of solute per liter of solution. Therefore, we can calculate the moles of iron(III) bromide using the equation:

moles = mass / molar mass

moles = 22.4 g / (molar mass of iron(III) bromide)

The molar mass of iron(III) bromide (FeBr3) is approximately 295.57 g/mol.

moles ≈ 22.4 g / 295.57 g/mol

moles ≈ 0.0758 mol

Now, we can calculate the molarity of the solution using the equation:

Molarity (M) = moles / volume (in liters)

Molarity ≈ 0.0758 mol / 0.250 L

Molarity ≈ 0.303 M

Therefore, the molarity of the iron(III) bromide solution is approximately 0.303 M.

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Answer:

I don't know I'm sorry I will tell you another