Which ones are elements, compounds I’ll give brainliest.

Answer:

energy

that seems like the most relevant answer

Answer:

In the elemental form, non-metals can be gas, liquid or solid. They aren't shiny (lustrous) and they don't conduct heat or electricity well. Usually their melting points are lower than for metals, although there are exceptions. The solids usually break easily, and can't bend like metals

Explanation:

Answer:

a.)cations; free to move around

b.)cations; fixed in place

The weight of aluminum are required to produce 8.70 moles of aluminum chloride is 234.9 g

Aluminum chloride is useful for the treatment of palmar, plantar, and axillary hyperhidrosis.

Aluminum chloride has also been reported to be useful in facial and scalp hyperhidrosis

The balanced chemical equation represents the mole ratio in which the chemicals combine.

In this case, illustrates that 2 mol Al produces 2 mol Al Cl₃, hence these 2 chemicals are in a 1:1 ratio.

Thus, to produce 8.70 mol aluminium chloride, it will require 8.70 mol aluminium.

But this quantity of Al has a mass in grams of

m = n × Mr

   = 8.70 mol × 27g/mol

   = 234.9 g

Hence, The weight of aluminum are required to produce 8.70 moles of aluminum chloride is 234.9 g

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The statement which is true about glucose is (1) Glucose is a compound because it's made from more than 1 element. Hence the correct option is (1)

An element made entirely of one species of atoms, or an element, has a specific number of protons in its nucleus.

Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

Three substances make up glucose: carbon, hydrogen, and oxygen. They are set at a fixed ratio of 1:2:1.

Covalent bonds, in which two atoms share bonding valence electrons in one or more bonds, are used to bind these atoms together.

Therefore, The statement which is true about glucose is (1) Glucose is a compound because it's made from more than 1 element. Hence the correct option is (1)

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Answer:

B. There were 1,570 kJ of energy in the snack.

C. During her run, she used 755 Calories of energy.

F. The runner used more Calories while running than she consumed during her snack.

Explanation:

According to this question, a runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3,160 kJ while running.

Since 1 Calorie = 4.184 kJ, it means that the runner consumed 375 × 4.184 = 1570 kJ of energy. In other words, THERE WERE 1,570 kJ OF ENERGY IN THE SNACK.

Also, the runner burns 3,160 kJ while running meaning that she equivalently burnt 3160/4.184 = 755.258 calories. Approximately, 755 calories of energy were burnt by the runner while running.

In a nutshell, the runner consumed 375 calories of energy in her snack but used up 755 calories while running. This means that the runner used more Calories while running than she consumed during her snack.

Human activities are the primary cause of acid rain. The burning of fossil fuels in power plants and vehicles releases large amounts of SO2 and NOx into the atmosphere, which then contribute to the formation of acid rain. Other sources of acid rain include industrial processes, such as mining and smelting, and natural sources, such as volcanic eruptions.

"Acid rain occurs as wet or dry deposition and is mostly due to human activities." Acid rain is a term used to describe precipitation that has high levels of acidity. It is formed when emissions from burning fossil fuels, such as coal and oil, mix with water in the atmosphere. These emissions contain sulfur dioxide (SO2) and nitrogen oxides (NOx), which react with water, oxygen, and other chemicals to form sulfuric acid and nitric acid. These acids then mix with the rainwater or snow and fall to the ground.

Acid rain can occur as both wet and dry deposition. Wet deposition is when the acid rain falls directly to the ground in the form of rain, sleet, snow, or hail. Dry deposition is when the acid chemicals in the air settle on the ground or other surfaces without any precipitation.

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Answer: A change in appearance. (Please say thanks!)

Explanation:

The biggest sign of a chemical change is change in appearance.

Answer:

d

Explanation:

The property that causes the zinc shavings to react faster than the chunk of zinc is called the surface area.

The surface area is a crucial factor to consider while conducting any kind of chemical reaction because it considerably affects the reaction's rate. As surface area is reduced, response rates accelerate.

A chunk of zinc is like a body of stone kept together by strong bonding when contrasted to zinc shavings, which are zinc particles with lower surface areas.

The zinc shavings' reactive surface area is smaller than that of the enormous zinc chunk. Due to their reduced surface areas, reactants must be in close proximity to the acid solution for the reaction to take place.

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Answer:

The relative mass of an electron would be -1.

Hydrophobic colloids option b- can be stabilized by adsorption of ions.

Hydrophobic colloids are colloidal particles that repel water molecules and tend to aggregate or coagulate in aqueous solutions. To stabilize hydrophobic colloids, surfactants or stabilizing agents are added to the system.

These surfactants have hydrophobic and hydrophilic regions that can adsorb onto the surface of the colloidal particles, forming a protective layer that prevents their aggregation. This adsorption of surfactant molecules on the particle surface is commonly referred to as "stabilization by adsorption of ions".

The surfactant molecules adsorb onto the particle surface with their hydrophobic tails pointing inward towards the particle surface and their hydrophilic heads pointing outward towards the solvent, creating a stable colloidal dispersion. This stabilization mechanism is commonly used in the formulation of emulsions, suspensions, and other colloidal systems.

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The order of the reaction with respect to nitrate ion is 2.3. The activation energy for this reaction is Ea = 148 kJ/mol.

1. The basic form of rate law for the given reaction is as follows:

\(Rate = k [NO3-][I-]^3[H+]^22\).

Given: doubling the concentration of nitrate ion causes the rate of reaction to quadruple.The order of reaction with respect to nitrate ion can be calculated using the formula;

\(k2/k1 = (2^n)\)

where,n is the order of reaction with respect to nitrate ion k1 and k2 are rate constants of reaction at the respective concentrations of nitrate ion.Substituting the values given in the question;

\(4 = (2^n)\)

The value of n can be obtained by solving the equation.

n = 2

Therefore, the order of the reaction with respect to nitrate ion is 2.3.

We can use the Arrhenius equation to calculate the activation energy of the reaction.

\(k = Ae^{(-Ea/RT)}ln\)

\(k = ln A - (Ea/RT)\)

Taking the natural logarithm of both sides of the Arrhenius equation will give the equation of the line in the form y = mx + b,

where y = ln k, x = 1/T, m = -Ea/R, and b = ln A.

The slope of the straight line is -Ea/R.

Therefore,-6114 = (-Ea/R)

Solving for Ea,

Ea = 148 kJ/mol

The activation energy for this reaction is Ea = 148 kJ/mol.

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Answer:

\(5.450 \times {10}^{ - 4 } \times 3.550 \times {10}^{ - 7} \\ 19.3475 \times {10 }^{ - 11} \\ 1.935 \times {10}^{?10} \)

Answer:

t = 3.29 hour

Explanation:

It is given that,

The distance between a car and the lizard is 35.3 miles.

The speed of the car is 30.5 m/s

We need to find how long will it take the car to drive 35.3m.

It means,

Distance, d = 35.3 miles

Since, 1 mile = 1609.34 m

⇒ 35.3 miles = 56809.84 m

Speed, v = 30.5 m/s

Speed, v = d/t

So,

\(t=\dfrac{d}{v}\\\\t=\dfrac{56809.84\ m}{30.5\ m/s}\\\\t=1862.61\ s\)

or

t = 3.3 hour

Hence, it will take 3.3 hour.

Answer:

The answer is "Option B"

Explanation:

From the query, the following knowledge is derived:  

Yield in percentage = 47%  

Performance of theory = 4860 g  

Actual yield Rate =?  

The percentage return is defined simply by the ratio between both the real return as well as the conceptual return multiplied by the 100. It's also represented as numerically:

\(Rate = \frac{Existing \ Rate} {Theoretical \ Rate} \times 100\)

Now We can obtain the percent yield as followed using the above formula:  

\(\text{Yield in percentage}= \frac{Actual \ yield \ Rate} {Theorical \ Rate} \times 100\)

\(47\% = \frac{Actual \ yield \ Rate}{4860}\)

The value of the Actual yield Rate =\(47\% \times 4860\)

                                                        \(= \frac{47}{100} \times 4860 \\\\ = 2284.2 g\)

The Actual yield Rate= 2284.2 g.

A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

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Then the solution is supersaturated.

As per the question, if NaCl is soluble in water to the extent 36.0 g NaCl/100 g H2O at 20 °C, then a solution at 20°C containing 45 g NaCl/160 g H2O would be:

Supersaturated at 20°C

Explanation:

A solution is considered to be supersaturated if it contains more solute than what can dissolve in it at a particular temperature. It is, therefore, an unstable solution, and if any disturbance is provided, the excess solute starts to form crystals or precipitate. Thus, such a solution is capable of further dissolving the solute.

Suppose a solution of NaCl is considered, which is soluble in water to the extent of 36.0 g NaCl/100 g H2O at 20°C. This information helps in determining the solubility of NaCl at 20°C, which is 36.0 g NaCl/100 g H2O.Now, consider another solution that contains 45 g NaCl/160 g H2O at 20°C.

For determining whether the solution is saturated, unsaturated or supersaturated, compare the solubility of NaCl at 20°C to the given concentration of NaCl in the solution.The solubility of NaCl is 36.0 g NaCl/100 g H2O at 20°C, whereas the given concentration of NaCl in the solution is 45 g NaCl/160 g H2O. This concentration is higher than the solubility of NaCl.

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Explanation:

B. Recycles slowly

And it also depends on the organism

The moles of the copper (ii) sulfate that is CuSO₄ are in the 0.125g sample of the CuSO₄ is 0.0007 g/mol.

The mass of the copper sulfate, CuSO₄ = 0.125 g

The molar mass of the copper sulfate, CuSO₄ = 159.6 g/mol

The number of moles of copper sulfate, CuSO₄ = mass / molar mass

Where,

The mass of CuSO₄ = 0.125 g

The molar mass of CuSO₄ 159.6 g/mol

The number of moles of copper sulfate, CuSO₄ = mass / molar mass

The number of moles of copper sulfate, CuSO₄ = 0.125 g / 159.6 g/mol

The number of moles of copper sulfate, CuSO₄ = 0.0007 mol

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The temperature outside red rubber dodge ball filled with compressed air is -21.86⁰C.

The new temperature of the compressed air is determined from Charles's law as shown below;

V1/T1 = V2/T2

T2 = (T1V2)/V1

where;

T1 = 20 + 273 = 293K

T2 = (293 x 3)/3.5

T2 = 251.14K = -21.86⁰C

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According to Gay Lussac's law, the pressure of a given mass of gas is directly proportional to its temperature provided that volume is constant. Mathematically;

From the given question, we are given the following parameters:

Substitute the given parameters into the formula as shown:

Therefore the pressure of the spray paint at 480 celsius is 50.71psi

Answer:

Using Charles law of Gas

Explanation:

A molecule's linear geometry is made up of two areas of electron density around the central atom, whereas trigonal planar geometry is made up of three regions, tetrahedral geometry of four, trigonal bipyramidal geometry of five, and octahedral geometry of six.

Lewis's structure demonstrates that the nitrogen atom also contains a single electron and a single electron pair. Thus, Tetrahedral Geometry is produced by central atoms with four electron pairs, all of which are bonding electron pairs, in accordance with the Valence Shell Electron Pair Repulsion (VSEPR) Theory.

Valence shell electron-pair repulsion theory (VSEPR theory) allows us to anticipate the molecular structure of a molecule from an analysis of the number of bonds and lone electron pairs in its Lewis structure, including approximation bond angles around a center atom.

The VSEPR model presupposes that electron pairs in the valence shell of a central atom would choose a configuration that maximizes the distance between them while minimizing repulsions between these electron pairs.

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Answer:

A. hydrolysis reaction.

Explanation:

Chemical Reactions.

First, let's review each concept of the group of answer choices:

- hydrolysis: is a reaction in which the net reaction is an organic compound reacting with water to give either two molar equivalents of a single product or more than one product.

- redox: is a type of chemical reaction that involves a transfer of electrons between two species.

- combustion: is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat.

- neutralization: is a reaction that occurs when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water.

The problem is asking for the reaction that removes a phosphate group from ATP, so let's see the structure of ATP with one phosphate group:

What is enclosed in the red box is the phosphate group.

The reaction that removes this phosphate group represents a rupture of the structure and based on the logic of the definitions of the given concepts, the answer would be that the reaction to remove one phosphate group from ATP is A. hydrolysis reaction. This reaction looks like this:

ATP + water (H2O) -> ADP + Pi,

where ADP is the same molecule of ATP but it has two phosphate groups and Pi is the phosphate group removed.

Answer:

The primary distinction between liquid and aqueous is that liquid refers to any fluid that is almost incompressible, whereas aqueous refers to liquids that contain water as the solvent.

Explanation:

Different genes are active in muscle cells than are active in bone cells.

Muscle cells produce myofibrillar proteins such as actin and myosin because they are essential components of the muscle fiber structure and function. Actin and myosin are the primary proteins responsible for muscle contraction, which allows muscles to generate force and movement.

In contrast, bone cells do not produce these proteins because their function is different from that of muscle cells. Bone cells, such as osteoblasts and osteoclasts, produce extracellular matrix proteins, including collagen, which provide structural support and strength to bones.

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Answer:

Elements make up a compound.

Answer:

Each element has its own unique properties. Each contains a different number of protons and neutrons, giving it its own atomic number and mass number. The atomic number of an element is equal to the number of protons that element contains. The mass number is the number of protons plus the number of neutrons of that element. Therefore, it is possible to determine the number of neutrons by subtracting the atomic number from the mass number.

Explanation:

Hope that helps you!

Each element has is own chemical and physical properties which make them unique and ideal for there uses.

Properties are defined as a characteristics of a particular substance that can observed in a chemical reaction.

There are mainly two types of properties

Both the chemical and physical properties are different for each elements and compounds.

Each elements has different number of protons and neutrons that contains its own atomic number and atomic mass

Thus, each element has is own chemical and physical properties which make them unique and ideal for there uses.

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