SCIENCE:how can i model a ice cream maker melting!?

Answer:  1)  temperature, 2) add a catalyst, and 3) concentrations

Explanation:  A rise in temperature adds kinetic energy to the reactants, leading to more frequent, and energetic collisions, which will often accelerate the reaqction.  A catalyst is an agent that helps the reaction move forward more quickly by offering a substrate that aids in orienting the reactants for more efficient reaction.  A higher concentration increases the chances of collisons that result in products.

Answer: it is Not a pure substance because it consists of sodium so it would be a mixture because it contains sodium

Explanation:

plz mark brainliest

its mixture

Explanation:

phosphorus atoms has 15 electrons and 15 protons with valence 5 electron in outer shell and is highly reactive element

Answer:

In our head there is skull and inside the skull there is our brain.

Answer:

Both brain and skull is inside our head. If you meant like really inside, then the brain will be the most appropriate answer. Actually, inside our head, there is the skull and inside our skull is the brain.

Answer: acetone

Explanation: Acetone has the weakest intermolecular forces, so it evaporated most quickly. Water had the strongest intermolecular forces and evaporated most slowly.

Answer:

0.175M or 0.18M with correct significant figures

Explanation:

use the equation M1×v1=M2×v2 where M1= 0.25M, V1= 105mL or 0.105L, and V2= 105mL+45mL (150mL or 0.150L)

(0.25M×0.105L)÷0.150L = M2

Answer:

B.)changes in dietary intake, lifestyle, and disease risk to match those of a new country,

The total number of atoms make up the products :

D) 1 carbon, 4 hydrogen, and 4 oxygen

Complete combustion of Hydrocarbons with Oxygen will produce CO₂ and H₂O compounds.

If O₂ is insufficient there will be incomplete combustion produced by CO and H and O

Hydrocarbon combustion reactions (especially alkanes)

For combustion of methane (CH₄) and two molecules of oxygen (O₂).

\(\tt CH_4+2O_2\rightarrow CO_2+2H_2O\)

The number of atoms make up the products

CO₂ : 1 carbon, 2 oxygen

2H₂O : 4 hydrogen , 2 oxygen

The total number of atoms make up the products :

D) 1 carbon, 4 hydrogen, and 4 oxygen

Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat.

Combustion of Hydrocarbons with Oxygen will produce CO₂ and H₂O compounds.

CO₂ : 1 carbon, 2 oxygen

2H₂O : 4 hydrogen , 2 oxygen

Thus, the correct option is D.

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Robert Boyle established chemistry as a discipline based on measurement, freeing it from the mysticism and alchemy that had plagued it. He introduced the concept of chemical analysis and defined elements, compounds, and mixes.

Boyle used a vacuum chamber to alter the gas's pressure in order to find the link between pressure and volume in a gas, which is now known as Boyle's law. In order to demonstrate that pressure and volume are inversely related to one another, he made detailed observations and carried out a number of experiments.

He developed a new vacuum pump and performed experiments in vacuum, they found that neither sound nor flame could exist there.

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Answer:

When we talk about a compound's mass percent, we want to know how much of that chemical is in a combination or sample. To calculate the mass percent, we must first know how much of the compound we have and how much of everything else we have.

Assume we have a dish of fruits that weights 100 grammes. We'd want to know how much of the fruit is made up of kiwis. We count the kiwis and discover that there are twenty of them.

To calculate the mass % of kiwis, we must first determine how much they weigh in comparison to the rest of the fruits. Assume the kiwis weigh 40 grammes in total. We may use this data to compute the percentage of kiwis in the fruit:

Mass percent of kiwis = (mass of kiwis ÷ total mass of fruits) × 100%

Mass of kiwis = 40 grams

Total mass of fruits= 100 grams

Mass percent of kiwis= (40 grams ÷ 100 grams) × 100% = 40%

So we can say that the fruits is 40% kiwis.

Similarly, when we want to find the mass percent of a compound in a mixture or sample, we need to know how much of that compound we have and how much of everything else we have. We can use the formula I gave earlier to calculate the mass percent of the compound.

which is Mass percent = (mass of compound consumed ÷ total mass of sample) × 100%

Below here is the answer, but i suggest you should give it a try first :)

Molar mass of the compound = 20 grams/mole

Mass of the compound consumed = 2 moles × 20 grams/mole = 40 grams

Total mass of the sample or mixture = 50 grams

Mass percent of the compound = (40 grams ÷ 50 grams) × 100% = 80%

So the mass percent of the compound in the sample is 80%.

The option that best describes how to correct the Wiliam error, is The third result, should state that the kinetic energy of the ejected electrons depends only on the frequency of the photons. Correct answer: letter D.

Since, the best way to correct Wiliam's error is to edit the third result to state that the kinetic energy of the ejected electrons depends only on the frequency of the photons. This can be done by replacing the existing sentence with the new sentence, or simply adding it as an additional statement.

The photoelectric effect, first explained by Albert Einstein in 1905, is the phenomenon in which electrons are emitted from the surface of a metal when light of a certain frequency, or energy level, is shone upon it.

The photoelectric effect was first observed by William Hallwachs in 1887. Hallwachs observed that when light was shone on a metal, an electric current was produced. This current was proportional to the intensity of the light and independent of its frequency, leading him to conclude that the energy of the light was being transferred to the electrons in the metal.

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Answer:

\(\boxed {\boxed {\sf 2.36 \ mol \ SO_2}}\)

Explanation:

We are asked to convert grams to moles. We will use the molar mass and dimensional analysis to perform this conversion.

The molar mass is the mass of 1 mole of a substance. These values are found on the Periodic Table because they are equivalent to the atomic masses, but the units are grams per mole instead.

We are given a mass of sulfur dioxide (SO₂). Look up the molar masses of the individual elements.

Notice that the formula of the compound contains a subscript. The subscript after O means there are 2 moles of oxygen in 1 mole of sulfur dioxide. We must multiply oxygen's molar mass before adding sulfur's.

Now we will use dimensional analysis to convert grams to moles. From the molar mass, we know there are 64.068 grams of sulfur dioxide per mole, so we can set up a ratio.

\(\frac {64.068 \ g \ SO_2} {1 \ mol \ SO_2}\)

We are converting 151 grams to moles, so we multiply by this value.

\(151 \ g \ SO_2 *\frac {64.068 \ g \ SO_2} {1 \ mol \ SO_2}\)

Flip the ratio so the units of grams of sulfur dioxide cancel.

\(151 \ g \ SO_2 *\frac {1 \ mol \ SO_2}{64.068 \ g \ SO_2}\)

\(151 *\frac {1 \ mol \ SO_2}{64.068 }\)

\(\frac {151}{64.068 } \ mol \ SO_2\)

\(2.356870825 \ mol \ SO_2\)

The original measurement of grams (151) has 3 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place. The 6 in the thousandth place tells us to round the 5 in the hundredth up to a 6.

\(2.36 \ mol \ SO_2\)

151 grams of sulfur dioxide is approximately 2.36 moles of sulfur dioxide.

Answer:ehwusvudhwdvwxkwvbxbwxbxiwhxjvwxjvxwjxvjxvwxiwvxiwzgiwxvwjsbwis

HOPE IT HELPS IF YOU LIKE MY ANSWER THEN MARK ME AS BRAINLIEST ;-);-)

14000 g (14 kg) of 20% ichthammol ointment to make 70 g of 8% ichthammol ointment.

To determine how many grams of 20% ichthammol ointment should be mixed with petrolatum to make 70 grams of 8% ichthammol ointment, you can use the following formula:

(% ichthammol in final product) × (final product weight) = (% ichthammol in initial product) × (initial product weight)

Let x be the weight of the 20% ichthammol ointment that is needed.

(0.08) × (70 g) = (0.20) × (x)

Solving for x, you get:

0.08 × 70 = 0.20 x x

560 = 0.20 x x

x = 2800/0.20

x = 14000 g

So, you would need 14000 g (14 kg) of 20% ichthammol ointment to make 70 g of 8% ichthammol ointment. Keep in mind that the rest of the 70 g will be made up of petrolatum.

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The test for chlorine gas involves using specific chemical reactions and indicators to identify its presence. Here are two commonly used tests:

It's important to exercise caution when handling chlorine gas, as it is toxic and can cause respiratory irritation and other health hazards. Proper safety measures and ventilation should be in place when conducting tests or working with chlorine gas.

As for its uses, chlorine gas has various applications, including:

It's worth noting that there are alternative disinfection methods and chlorine-free alternatives available for some applications to reduce the potential environmental impact and health concerns associated with chlorine usage.

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True. Volatile solvents that act as CNS depressants, such as inhalants, can be found in a wide variety of household products.

Volatile solvents are chemicals that vaporize at room temperature and can be inhaled to produce intoxicating effects. These solvents are commonly found in various household products, including cleaning agents, paint thinners, adhesives, aerosol sprays, and certain fuels. Examples of volatile solvents include toluene, xylene, benzene, and trichloroethylene.

When these volatile solvents are inhaled, they enter the bloodstream through the lungs and quickly reach the central nervous system (CNS). In the CNS, they act as depressants, slowing down the activity of the brain and nerve cells. The effects can include dizziness, disorientation, euphoria, hallucinations, and in severe cases, loss of consciousness or even death.

It is important to note that inhalant abuse, particularly among adolescents and young adults, poses serious health risks and can lead to addiction, organ damage, cognitive impairment, and other long-term consequences. Proper usage and storage of household products containing volatile solvents are crucial to prevent unintended inhalation and protect individuals from the harmful effects associated with their misuse.

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Answer:

This is happened because, in water there is strong intermolecular force of attraction because of H- bonding. But, in case of HCl, the force of attraction is not so strong

The state of water at room temperature is liquid while Hydrogen chloride is a gas at room temperature. In consideration of three Van der Waals forces ( Keesom,  Debye, and London) which both Water and hydrogen chloride exhibit, Water exhibits hydrogen bonding, which Hydrogen chloride doesn't.

Since water has strong hydrogen bonds, more energy is required to boil water. Water has an electronegative O, water can form hydrogen bonds with other H20 molecules. We know that the hydrogen bond is stronger than the permanent dipole interaction in hydrogen chloride.

Since more energy is required to overcome the hydrogen bond in water.

Hence, the boiling point of water is 100°C while hydrogen chloride is -115°C.

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Answer:

1- fission

2- fusion

3- radioactive decay

4- gamma

5- alpha particle

6(high speed electron)- beta rays

7-plasma

To answer your question, when a cloud forms, positive and negative particles are present. The positive particles move upward in the cloud while the negative particles move downward.

As the negative particles continue to accumulate and become too heavy, they create an imbalance of electrical charge within the cloud. This leads to a discharge of electricity, commonly known as lightning, as the negative particles seek to neutralize themselves by moving towards the positively charged ground. So, in summary, the formation of lightning is the result of an excess of negative particles within a cloud.

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Bagasse, a residue from sugarcane, undergoes washing, drying, milling, mixing, and acid treatment to produce p-coumaric acid, an important phenolic acid with health benefits.

The block flow diagram of the production of p-coumaric acid from any plant source (bagasse) is given below: Block Flow Diagram of the production of p-coumaric acid from any plant source (bagasse). Bagasse is a solid residue left after the extraction of juice from sugarcane.

p-Coumaric acid is an important phenolic acid that has various health benefits. It is produced from bagasse using different processes that involve different types of equipment. The following is the process of producing p-coumaric acid from bagasse: Bagasse → Washed → Dried → Milled → Mixed → Treated with acid → p-Coumaric acid.

The above block flow diagram represents the production process of p-coumaric acid from bagasse in chemical engineering. This process of producing p-coumaric acid can be explained step-by-step as given below:

Bagasse: The process of producing p-coumaric acid begins with bagasse, which is a solid residue that remains after extracting juice from sugarcane. It is a low-cost material and is readily available in large quantities.

Washing: The bagasse is washed thoroughly to remove impurities and dirt from the material. Drying: The washed bagasse is then dried to remove excess water from the material. Milling: The dried bagasse is milled to reduce the size of the material.

Mixing: The milled bagasse is mixed with other materials to create the desired mixture. Acid: Treatment: The mixture of bagasse is then treated with acid to convert the lignocellulose into p-coumaric acid. The acid treatment involves the use of various types of equipment like reactors, mixers, and separators.

p-Coumaric Acid: The final product of the process is p-coumaric acid, which can be purified and used for various applications.

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Answer:

Forgery cases in California are indeed difficult for a prosecutor to prove in court. ... It is also true that these cases are legally complex and may involve multiple documents, multiple victims, and hold serious felony penalties.

The molecules with one or more pi (π) bonds are CO and CH3COCH3.

Out of the molecules you listed, the following contain one or more pi (π) bonds:

CO (carbon monoxide): It contains a triple bond between the carbon (C) and oxygen (O) atoms. This triple bond consists of one sigma (σ) bond and two pi (π) bonds.

H2O (water): It does not contain any pi (π) bonds. Water molecules have two sigma (σ) bonds formed between the hydrogen (H) and oxygen (O) atoms.

CH3COCH3 (acetone): It contains one pi (π) bond. Acetone has a double bond between the carbon (C) and oxygen (O) atoms in the carbonyl group (-C=O).

CO2 (carbon dioxide): It does not contain any pi (π) bonds. Carbon dioxide consists of two double bonds between the carbon (C) and oxygen (O) atoms, but these double bonds involve two sigma (σ) bonds and do not have pi (π) bonds.

To summarize, the molecules with one or more pi (π) bonds are CO and CH3COCH3.

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4.01 x 1012 grammes of beryllium contain 4.45 x 1011 moles of beryllium. The chemical element beryllium has the atomic number 4 and the letter Be assigned to it. Alkaline earth metal is brittle, steel-gray, strong, and light.

The formula: can be used to determine how many moles of a material there are.

Molar mass divided by mass equals a mole.

Beryllium has a molar mass of 9.012 g/mol.

Therefore, we can perform the following calculation to determine how many moles of beryllium there are in 4.01 x 1012 grammes of beryllium:

4.01 x 10-12 grammes are equal to 9.012 grammes per mole.

4.45 x 1011 moles are one mole.

Therefore, 4.01 x 1012 grammes of eryllium contain 4.45 x 1011 moles of eryllium.

Note that both numbers must have the same exponent when writing in scientific notation, and that you must use a calculator to perform the calculation if you don't want to receive the wrong answer.

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We need ti find how many elements there are in the first period and what are these.

To know what is the first period we must use that

Seeing the periodic table, the first row has two elements.

We can see that these elements are H ( hydrogen ) and He ( helium ).

ANSWER:

Firs period in the periodic table has two elements and they are called hydrogen and helium.

Answer:

The reaction of an acid and a base is called a neutralization reaction. ... However, in the reaction between HCl(aq) and Mg(OH) 2(aq), additional molecules of HCl and ... First, we will write the chemical equation with the formulas of the reactants ... The chloride ions are the only spectator ions  I THINKS

Explanation:

Answer:

Newspaper

Explanation:

Edge

Answer:

The answer is Newspaper on edge

Explanation:

Hes correct

Answer:

The first one and the last one.

Explanation:

Carbon dioxide is generated by cellular respiration and released into the atmosphere.

Photosynthesis makes oxygen that plants can release into the atmosphere.

Answer: Zelda should place one container of water in sunlight (by a window or outdoors) and the other container in a dark room (closet) away from the sun.

Explanation: This would allow Zelda to test two different settings (sun and no sun) so she can test her hypothesis.