is copper metal mixed with water an:

a) element
b) compound
c) heterogeneous mixture
d) homogeneous mixture​

Answer:

Z: Planet was formed after the sun.

Explanation:

Characteristic Z: The planet was formed after the sun cannot be used to help identify the planet since all the planets in the solar system, including Earth, were formed after the sun. Therefore, this characteristic applies to all planets in the solar system, and it cannot be used to distinguish one planet from another.

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When 2.0 moles of O2 react, 88.02 grams of CO2 are produced.

To determine the mass of CO2 produced when 2.0 moles of O2 react, we need to use the balanced chemical equation for the combustion of a hydrocarbon:

CxHy + O2 → CO2 + H2O

From the equation, we can see that for every mole of O2 that reacts, one mole of CO2 is produced.

Therefore, if 2.0 moles of O2 react, we can expect 2.0 moles of CO2 to be produced.

To convert moles to mass, we need to use the molar mass of CO2, which is 44.01 g/mol.

So, multiplying the number of moles by the molar mass, we get:

2.0 mol CO2 x 44.01 g/mol = 88.02 g CO2

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Answer:

Energy can be used, transferred, and formed into another form, or transformed into cows, which is what happens during nuclear fusion.

Explanation:

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Answer:

B. gamma rays

Explanation:

Hope it helps!

The combustion of butane in oxygen (air) is represented in the  balanced chemical equation as 2 C₄H₁₀ + 13 O₂\(\rightarrow\) 8 CO₂ + 10 H₂O.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

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Your question is incomplete but most probably your full question was:The combustion of butane in oxygen (air) is represented in the equation 2 C₄H₁₀ + 13 O₂\(\rightarrow\)

Answer:

inspiration

Explanation:

Answer:

Liquid is a fluid. WIthout a container Liquid would be all over the place, when its in a container its contained. Solids dont always need a container because they are solid and most likely wont go all over the place.

Answer: The answer is malleable.

Explanation: Malleability is a physical property that some elements of matter have that can be broken down into sheets to give them a certain shape without breaking. This physical property belongs to plasticity. It is a characteristic that some metals have, sheets of said metal can be obtained. The heat needs to be increased, some examples are gold, platinum, zinc, tin, etc.

Answer:

b and c

Explanation:

If the natural abundance of chlorine-35 is 75.8% and that of chlorine-37 is 24.2%, then the average atomic mass of chlorine will be 35.44 amu.

Chlorine exists in two isomeric forms which are the chlorine-35 and chlorine-37. The atomic mass of the chlorine elements is basically the average atomic mass of its isotopes depending upon their abundance in nature.

The atomic mass of chlorine-35 is 34.97amu and a natural abundance equal to 75.8 %. The atomic mass of chlorine-37 is equal to 36.97 amu with an abundance of 24.2%.

To calculate the average atomic mass of chlorine,

The abundance of chlorine-35 = 75.8% = 0.758

The abundance of chlorine-37 = 24.2% = 0.242

⇒ Average atomic mass = 34.97 × 0.758 + 36.97 × 0.242

⇒ Average atomic mass = 26.50 + 8.94

⇒ Average atomic mass = 35.44 amu  

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The measure of the total energy radiated by a star in one second is called luminosity.

Luminosity represents the intrinsic brightness of a star and is a measure of the total power output in terms of energy. It is an important characteristic of a star that indicates its size and temperature.

Luminosity is typically expressed in units of watts or solar luminosities (the luminosity of our Sun). Flux, on the other hand, refers to the amount of energy received per unit area per unit time, and it is influenced by the distance between the star and the observer. Apparent magnitude and absolute magnitude are measures of a star's brightness as observed from Earth and at a standard distance, respectively, and they are related to luminosity but not the direct measure of energy radiated.

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The reaction with S_N₂mechanism is likely to be faster than the reaction with S_N₂ mechanism. This is because the carbocation intermediate formed in S_N₁ mechanism is more stable.

The pair of reactions given below is:

CH₃Cl + NaOH→CH₃OH + NaCl

CH₃I + NaOH→CH₃OH + NaI

The type of substitution mechanism:

The first reaction involves S_N₁ mechanism (unimolecular nucleophilic substitution). The second reaction involves S_N₂ mechanism (bimolecular nucleophilic substitution).

Prediction of the reaction that will occur at a faster rate:

The reaction with S_N₁ mechanism is likely to be faster. The rate of this reaction mainly depends on the stability of the carbocation intermediate formed after the initial step. In this case,CH₃Cl reacts to form a tertiary carbocation which is more stable than the primary carbocation formed in CH₃I.

Drawing the correct organic product:

CH₃Cl + NaOH→CH₃OH + NaCl

CH₃I + NaOH→CH_3OH + NaI

CH₃C reacts with NaOHin an S_N₁ mechanism to produceCH₃OH and NaCl.


CH₃ reacts withNaOH in an S_N₂mechanism to produce CH₃OH and NaCI.


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Answer:

B: Physical change occurred in both substances.

Explanation:

Physical change vs chemical change.

Physical change, a substance's appearance changes, but its matter does not.

Chemical change, a type of matter that changes, and also new substance is formed with new properties.

Since one thing happened on both, the correct answer is B.

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Explanation:

H2O:

2 H2O shows 2 atoms of hydrogen. The number 2 in front of it means 2 moles of H2O

----------

CHA:

It only shows 1 atom of hydrogen

1 CHA means 1 mole of CHA

2 CHA means 2 moles of CHA

----------

HO2:

It only shows 1 atom of hydrogen

---------

H2SO4:

It shows 2 atoms of hydrogen

Answer:

H2O

H2SO4

Answer:

10 L

Explanation:

The equation of the reaction is;

2BaO2 = 2BaO + O2

Number of moles of  BaO2 = 114.7 g/169.33 g/mol = 0.677 moles

From the reaction equation;

2 moles of BaO2 yields 1 moles of O2

0.677 moles of BaO2 yields 0.677 * 1/2 = 0.3385 moles of oxygen

Hence;

PV=nRT

V = ?

P = 127400 Pa or 1.257 atm

T = 455 K

n = 0.3385 moles

R = 0.082 atmLmol-1K-1

V = nRT/P

V = 0.3385 * 0.082 * 455/1.257

V= 10 L

Answer:

ask a question

Explanation:

You have to ask a question or solve a problem before you can develop a prediction/hypothesis, conduct an experiment or even make a conclusion. The question comes first.

Answer:

Explanation:

To identify the limiting and excess reagents, we need to compare the moles of each reactant and determine which one is present in a stoichiometrically lesser amount.

Given:

Mass of silicon (Si) = 40.0 g

Mass of nitrogen (N2) = 25.5 g

To determine the moles of each reactant, we need to divide their masses by their respective molar masses.

Molar mass of silicon (Si) = 28.0855 g/mol

Molar mass of nitrogen (N2) = 28.0134 g/mol

Moles of silicon (Si) = 40.0 g / 28.0855 g/mol ≈ 1.424 mol

Moles of nitrogen (N2) = 25.5 g / 28.0134 g/mol ≈ 0.911 mol

Next, we need to determine the stoichiometric ratio of the reactants based on the balanced chemical equation. Let's assume the balanced equation is:

3Si + 2N2 → Si3N4

From the balanced equation, we can see that 3 moles of silicon react with 2 moles of nitrogen to form 1 mole of silicon nitride.

Comparing the mole ratio of silicon to nitrogen, we have:

1.424 mol Si : 0.911 mol N2

Since the ratio is not a whole number ratio, we can simplify it by dividing both sides by 0.911:

1.424 mol Si / 0.911 mol N2 ≈ 1.56

Based on this ratio, we can see that the stoichiometric ratio of silicon to nitrogen is approximately 1.56:1. This means that 1.56 moles of silicon react with 1 mole of nitrogen.

Now, comparing the given moles of silicon and nitrogen to the stoichiometric ratio, we can determine the limiting and excess reagents.

Since we have 1.424 mol of silicon and the stoichiometric ratio requires only 1.56 moles of silicon per mole of nitrogen, silicon is the limiting reagent.

Nitrogen, with 0.911 mol, is in excess because it is not fully consumed in the reaction.

In conclusion:

Silicon (Si) is the limiting reagent.

Nitrogen (N2) is the excess reagent.

Answer:

claim

Explanation:

CLAIM: The newt population became more poisonous because the snakes in this environment caused poison to be an adaptive trait, and Poison Level 10 is the most common because the newts with this trait were able to live longer and reproduce more than other newts.

Answer:

Partial pressure of O2 = 4.93 atm

Explanation:

PV = n RT        R = .082057 L-atm/mol-K

n = 6.3 + 8.15 = 14.45 moles

348 C = 621.15 K

P (65.1) = 14.45 ( .082057)(621.15) = 11.31 atm

Now the fraction of pressure from Oxygen is

   6.3 / (6.3+8.15)  * 11.31 = 4.93 atm

The Delta system describes fatty acids in relation to the Carboxyl  end of the carbon chain and indicates the location of the double bonds.

Four wires make up the Delta configuration: three hot conductors and one ground conductor. The connection is established from one winding end to the starting end of the other, establishing a closed circuit, and the phase loads (such as motor windings) are connected to each other in the shape of a triangle.

The three phases are joined in a triangle-like fashion in the delta arrangement. They typically don't have a neutral cable. With a Y configuration, the phase voltage is equal to the line voltage divided by root 3 (sqrt(3) = 1.732), whereas in a Delta configuration the phase voltage is equal to the line voltage.

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Answer:

Corrosion is your answer

Answer:

▷The answer would be

 ▶︎corrosion

Explanation:

~corrosion~ is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials by chemical and/or electrochemical reaction with their environment

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Pectin's ability to improve texture, stability, and flavor makes it a valuable ingredient in many processed foods and beverages. The correct answer is "All of the answers are correct".

Pectin is a complex carbohydrate that is commonly found in fruits and vegetables. It is widely used in the food industry as a thickening agent, stabilizer, and gelling agent.

One of the key benefits of pectin is its ability to improve the texture of processed foods and beverages.

For example, when added to frozen products, pectin can help to control the size of ice crystals that form during the freezing process. This helps to prevent the formation of large ice crystals that can cause the product to become icy or gritty in texture.

Pectin can also help to prevent the loss of syrup during the thawing process, which helps to maintain the product's overall texture and flavor.

In addition, pectin can be used to evenly distribute added substances such as fruit pieces, nuts, or chocolate chips throughout a product. Without pectin, these substances would tend to sink to the bottom of the product, resulting in an uneven texture and flavor.

Finally, pectin can also be used to increase the viscosity of liquids, making them thicker and more stable. This is particularly useful in products such as fruit juices and jams, where a thicker, more spreadable consistency is desired.

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Flash flood along a normally dry river valley be a dangerous event densely populated area also river valley are so dangerous for flash flood

Flash flood is the move at very fast speed and can roll bounders also tear out tree and destroy building and destroy bridges also and wall of water can rich height 10 to 20 feet and and flash flood are so dangerous in the densely populated area as well as river valley it is so high risk for flash flood and flash flood is the more common in the area where dry climate and rocky terrain are seen because there is lack of soil and vegetation allow torrential rain to flow overland rather than infiltrate into the ground

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Answer: A volume of .5650 what? And what unit will be considered?

Answer:

fdsfesd

Explanation:

fesdfes

Elements with high ionization energies typically also have high electronegativity values.

This is because the strength of the attraction between an atom and the electrons it contains affects both properties. The more strongly an atom attracts its electrons, the higher it's ionization energy and electronegativity.

This is because it requires more energy to remove the electrons from the atom, resulting in higher ionization energy, and it will also take more energy to attract electrons away from another atom, resulting in a higher electronegativity. This means that elements with high ionization energies typically also have high electronegativity values.

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Answer: 57 neutrons

Explanation: Ruthenium has an atomic number of 44, meaning it has 44 electrons, 44 protons, and 57 neutrons.

Answer:

57 neutrons

Explanation:

Ruthenium has atomic number of 44, that is, it contains 44 electrons distributed in atomic orbitals and its nucleus has 44 protons and 57 neutrons (Figure 1). Electron distribution in atomic or molecular orbitals is called electron configuration which for Ru and the other group 8 chemical elements is shown in Table 1.

The grams of magnesium will be needed to react if the conditions are 0.985 atm and 22 °C is 0.49 g.

The reaction is as follows :

3Mg + 2H₃PO₄ → Mg₃(PO₄)₂ + 3H₂

Volume = 500 mL = 0.500 L

Pressure = 0.985 atm

Temperature =  22 °C = 295 K

The ideal gas equation is as follows :

P V = n R T

n = P V / R T

n = ( 0.985 × 0.500 ) / ( 0.082 × 295 )

n = 0.492 / 24.18

n = 0.020 mol

The number of moles = 0.020 mol

3 moles of H₂ = 3 moles of Mg

The moles of Mg = 0.020 mol

The molar mass of the magnesium = 24.30 g/mol

The mass of the magnesium = moles × molar mass

                                             = 0.020 × 24.30

                                             = 0.49 g

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Answer:

y = 2.77 cm

Answer: The third dimension is 2.77 cm

This lists the metals magnesium,  Iron can be oxidized with an Sn2+ solution but not with an Fe2+ solution.

The correct answer is C -Nickel and cadmium

Everyone has seen the red iron oxide (rust) that develops on steel products that haven't been adequately safeguarded. The red rust that forms is typically loose and scaly, and it peels off readily, exposing a greater portion of the underlying material to the atmosphere. Metals like stainless steel, which is steel with nickel and chromium added, oxidize as well, though.

The electrons that the metals loses during the oxidation process can also be a hydrogen bond. 

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