WILL MARK BRAINLIEST
What occurs when energy is added or removed from an object or a system by an outside agent?
Potential Energy
Kinetic Energy
Elastic Potential Energy
Thermal Energy
Work

Answer: 4

Explanation: because the zero doesn't count

ANSWER:

Elements- Elements are simpliest and pure form of a substance

Molecule- a group of identical atoms form a molecule

Compound- When Two or more different elements chemically combine, they produce compounds

Answer:

Power plants are not located in cities. Power has to travel a long distance over power lines to reach cities.

Explanation:

Answer:

The reaction will proceed to the right and produce more products.

Explanation:

The reaction produces heat, so it is exothermic. If you remove heat, the reaction counters that by producing more products and replacing the heat that was lost.

Answer:

87.50g(1cm^3/1.1738g)=50.345 cm^3

Explanation:

volume units id in cubic centimeters

(a) The heat generated in the process is 28 kJ.

(b) The work done in the process is determined as -28 kJ.

(c) The change in the internal energy is 0.

The heat generated in the process is negative done in the process.

W = -PΔV

W = -P(V₂ - V₁)

W = -P(VB - VA)

W = -11(7 - 12.5)

W = 60.5 L.atm = 60.5 x 101.325 J/L.atm = 6,130.16 J

W = -25(20.5 - 7)

W = -337.5 L.atm = -34,197.18 J

Total work , w = -34,197.18 J +  6,130.16 J = -28 kJ

q = - w

q = 28 kJ

ΔE = q + w

ΔE = 28 kJ - 28 kJ = 0

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The structural formula of butanol is C4H9OH. It consists of a chain of four carbon atoms, with a hydroxyl (-OH) group attached to one of the carbon atoms. Butanol has several structural isomers, which have the same molecular formula but different structural formulas.

A structural isomer is a compound that has the same molecular formula as another compound but has a different arrangement of its atoms. A string of 4 C atoms are bonded above, below, left, and right to H, except the second C, which is bonded below to O, which is bonded below to H is a structural isomer of butanol.

This is called butan-2-ol. The structural formula of butan-2-ol is CH3CH(OH)CH2CH3. In this isomer, the hydroxyl group is attached to the second carbon atom in the chain, whereas in butanol, the hydroxyl group is attached to the first carbon atom in the chain.

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The amount of 0.110 M sulfuric acid are required to neutralize exactly 25.0 mL of 0.0840 M NH3 solution is 9.55mL.

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products. H+ ions and OH- ions combine to generate water during a neutralisation process.

2 NH3(aq) + H₂SO4 (aq) → (NH4)2SO4(aq)

moles of NH3 = (25ml x 1L/1000mL) x 0.084M

=> 2.1x 10^(-3) moles

The mole ratio of NH3 to H₂SO4 in the given reaction

=> moles of H₂SO4 = 2.1 x 10^(-3) moles of NH3 x 1 molesH₂SO4/2 moles

                                                                                                                  NH3

=> 1.05 x 10^(-3) moles

Volume = moles/molarity

=> 1.05  10^(-3) moles/0.110M

=> 9.55 x 10^(-3) L = 9.55mL

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The maximum safe operating temperature for this reaction is equal to 895°C.

Given the following data:

Scientific data:

Radius, r = \(\frac{width}{2} =\frac{22}{2} =11\;cm\)

First of all, we would determine the volume of the stainless-steel cylinder by using this formula:

\(V=\pi r^2 h\\\\V = 3.142 \times 11^2 \times 26.4\\\\\)

Volume, V = 10,036.81 \(cm^3\).

In liters, we have:

Volume, V = 10.04 Liters.

Next, we would determine the number of moles of dinitrogen monoxide (\(N_2F_2\)) gas:

\(Number \;of \;moles = \frac {mass}{molar\;mass}\\\\Number \;of \;moles = \frac {537}{66}\)

Number of moles = 8.136 moles.

Now, we can solve for the maximum safe operating temperature by applying the ideal gas equation:

\(PV=nRT\\\\T=\frac{PV}{nR} \\\\T=\frac{6.30 \times 10^3 \times 10.04}{8.136 \times 8.314}\\\\T=\frac{60541.2}{67.6427}\)

T = 895.02 ≈ 895°C.

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The component of the galaxy that is shown in the image is D. Stars.

The image shows fixed points of light that are in the night sky and in terms of the galaxy, this component is a star. Stars are massive spinning bodies of raw energy that is made from hydrogen fusion such as our own sun which is a star.

The reason these stars appear as such small points of light in the sky is because they are very far away. If were were to go closer, we would see that they are massive and many times larger than Earth.

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When the total number of reactants and products are the same in the reaction it is called a balanced chemical equation. The balanced chemical equation of H2+ Cl2   → 2HCl(g)

When the total number of reactants and products are the same in the reaction it is called a balanced chemical equation. In the given reaction one mole of 70 g of hydrogen reacts with 2 moles of Cl.

100 g of chlorine reacts with 2/ 70 * 100 = 2.86 gram of hydrogen.

70 grams of chlorine will produce 73 g of HCl.

100 gram of chlorine produce 73/ 70 * 100 = 104.28 g of HCl.

Therefore, When the total number of reactants and products are the same in the reaction it is called a balanced chemical equation. The balanced chemical equation of H2+ Cl2   → 2HCl(g).

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Answer:

steel because water gold and honey is not a mixture of something

Answer:

Steel

Explanation:

Answer:

I wish i could

Explanation:

Answer:

The southern hemisphere is currently experiencing "Summer"

Explanation:

The Southern hemisphere is experiencing summer because it is closer to the sun than the Northern Hemisphere and also, direct light is more hotter than indirect light.

So, first, let's try an EXPERIMENT!

Take a VERY bright flashlight or a very small laser that can't harm you or just burn a paper in 1 second.

Then, take a piece of paper, or maybe just your skin, (like your hand) and place it under the light or laser, (for the laser, you should probably take the paper), and place the light source right above your skin, then, after some time, when it gets hot, measure the temperature. (around like 30 seconds later),

Note down the temperature...

Now, do the same thing, accept, do it in a very weird angle, face it towards your paper or hand, but, do it in an angle. More than like 30 degrees. Then, after some time, note down the temperature.

You probably, noticed, that the direct light (the one with the straight light facing your paper or skin, was hotter). Look at the image below, and you can understand better.

So, the same thing applies to the earth. The southern hemisphere in this picture is facing more directly to the sun than the northern hemisphere. That is why your answer is

Thank you! Please mark me Brianliest!

Remember to have fun, and a nice day!

Answer:   summer

Explanation:

i do believe its 2 i am taking the test rn

The correct option is 2.

To solve an equation graphically, draw the graph for each side, or member, of the equation and see where the curves cross and are equal. The x values of these points are the solutions to the equation. There are many possible outcomes when one solves an equation.

There are three types of systems of linear equations in two variables, and three types of solutions.

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Calculating the equilibrium constant (K) for a reaction requires knowing the balanced equation of the reaction. I won't be able to give the exact value of K without the exact reaction equation. However, I can explain how to use the concentrations provided to determine K.

An equilibrium constant statement for the reaction has the general form:

\(K = [C]^c[D]^d / [A]^a[B]^b\)

In this case, let's assume the reaction is:

aA + bB ⇌ cC + dD

Given the initial and equilibrium concentrations of CO and Cl 2, the following values ​​can be applied to the concentrations:

[A] = [CO] (initial concentration)

[B] = [Cl2] (initial concentration)

[C] = [CO] (equilibrium concentration)

[D] = [Cl2] (equilibrium concentration)

Now that the concentration is determined, we can determine the equilibrium constant (K):

\(K = ([C]^c [D]^d) / ([A]^a [B]^b)K = ([CO]^c [Cl2]^d) / ([CO]^a [Cl2]^b)K = ([0.25]^c [0.15]^d) / ([0.79]^a [0.69]^b)\)

The equilibrium constant (K) for the reaction can be obtained by substituting the values ​​of a, b, c and d based on the balanced equation and the specified concentration.

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Answer:

The empirical formula of the compound is C2H5O.

The molecules of H2O that are produced are:  4.98 × 10²³ molecules of H2O

Process in which one or more substances are converted to one or more different products is called a chemical reaction.

To calculate the number of molecules of H2O produced, we can use the Avogadro's number, which is equal to 6.022 ×  10²³ molecules per mole of substance.

number of molecules = moles of substance × Avogadro's number

number of molecules = 0.829 moles × 6.022 ×  10²³molecules/mol

number of molecules = 4.98 ×  10²³molecules

Therefore, approximately 4.98 ×  10²³ molecules of H2O are produced.

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Answer:   3 mol oxygen.

Explanation:       Because by definition you have 1 mol of potassium nitrate. Potassium nitrate in this quantity comprises 1 mol K, 1 mol N,

Answer:

Organism B produces pyruvic acid at a faster rate as the temperature increases than Organism A.

Explanation:

The mass, in grams, of NaCl needed to use to make the solution is 1.76grams.

The mass of a substance can be calculated by multiplying the number of moles by its molar mass.

However, the number of moles must first be calculated by using the following expression:

Molarity = no. of moles ÷ volume

no. of moles = 0.249 × 0.1208

no. of moles = 0.03moles

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

mass of NaCl = 0.03 × 58.5 = 1.76g

Therefore, the mass, in grams, of NaCl needed to use to make the solution is 1.76grams.

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Answer:

A green liquid becoming a red liquid.

Explanation:

If the color change is unexpected it is a chemical change.

(If 2 clear liquids make a black, red, green, ect color it is a chemical change)

no normal color mix makes green turn red.

Answer:

Hope this helps ;) don't forget to rate this answer !

Explanation:

To find the number of moles of Cr(NO3)3 in the sample, we need to determine the number of moles of each element present in the compound.

The chemical formula for Cr(NO3)3 tells us that for every 1 mole of Cr(NO3)3, there is 1 mole of chromium (Cr), 3 moles of nitrogen (N), and 9 moles of oxygen (O).

We are given that the sample contains 8.36 moles of oxygen. Since the ratio of oxygen to Cr(NO3)3 is 9:1, the number of moles of Cr(NO3)3 in the sample is 8.36 moles O / 9 moles O/mole Cr(NO3)3 = 0.93 moles Cr(NO3)3.

Rounded to 3 significant figures, the answer is 0.93 moles Cr(NO3)3.

Answer:

The minks are very high on the aquatic food chain. The mink is a carnivorous animal, which means it eats only meat.

Explanation:

Answer:

The minks are very high on the aquatic food chain. The mink is a carnivorous animal, which means it eats only meat.

The point group of NO₃⁻is C₃v. The reducible representation of NO₃⁻ is 3A'. The molecular orbital diagram of NO₃⁻ shows three occupied p-orbitals and two unoccupied p-orbitals.

The point group of NO₃⁻ is C3v.

The reducible representation of NO3- can be obtained by multiplying the symmetry operations of the point group with the corresponding character table. The resulting reducible representation for NO₃⁻ is

Γ = 2A1 + B1 + E.

The molecular orbital diagram of NO₃⁻ can be drawn as follows

First, draw the molecular orbitals of NO₃⁻ in the same order as the atomic orbitals of NO₃⁻.

The molecular orbitals of NO₃⁻ are formed by the combination of the atomic orbitals of N and O atoms.

The 2s and 2p orbitals of N combine with the 2p orbitals of O to form σ and π bonding and antibonding molecular orbitals.

The resulting molecular orbital diagram of NO₃⁻shows that the highest occupied molecular orbital (HOMO) is a non-bonding orbital with A1 symmetry, while the lowest unoccupied molecular orbital (LUMO) is a π* antibonding orbital with B1 symmetry.

Answer:

9991 J

9.991 kJ

2.78 × 10⁻³ kWh

Explanation:

Step 1: Given data

Energy consumed per day by a person (E): 2388 cal

Step 2: Convert "E" to J

We will use the conversion factor 1 cal = 4.184 J.

2388 cal × 4.184 J/1 cal = 9991 J

Step 3: Convert "E" to kJ

We will use the conversion factor 1 kJ = 1000 J.

9991 J × 1 kJ/1000 J = 9.991 kJ

Step 4: Convert "E" to kWh

We will use the conversion factor 1 kWh = 3600 kJ.

9.991 kJ × 1 kWh/3600 kJ = 2.78 × 10⁻³ kWh

The limiting and excess reactant can be obtained as follow:

2Mg + O₂ -> 2MgO

From the balanced equation above,

48 g of Mg reacted with 32 g of O₂

Therefore,

62.1 g of Mg will react with = (62.1 × 32) / 48 = 41.4 g of O₂

We can see from the above that only 41.4 g of O₂ is required to react completely with 62.1 g of Mg.

Thus, the limiting reactant is magnesium, Mg and the excess reactant is oxygen, O₂

The mass of the excess reactant remaining can be obtained as shown below:

Mass of excess reactant remaining = Mass given - mass reacted

Mass of excess reactant remaining = 100 - 41.4

Mass of excess reactant remaining = 58.6 g

The mass of H₂SO₄ produced can be obtained as illustrated below:

Mg + O₂ -> 2MgO

From the balanced equation above,

48 g of Mg reacted to produce 80 g of MgO

Therefore,

62.1 g of Mg will react to produce = (62.1 × 80) / 48 = 103.5 g of MgO

Thus, the mass of product, MgO produced is 103.5 g

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Complete question:

If 62.1 grams of magnesium react with 100.0 grams of oxygen, how many grams of product are produced?

Which is the Limiting reactant?

Which is the Excess reactant?

How many grams of excess reactant remain?

The mass of the carbon dioxide is  49.72 g from the calculation done.

The phrase "mole fraction," which is often referred to as "molar fraction" or "amount fraction," is used to describe the proportions of a mixture's components. It is an intangible quantity that expresses the proportion between the moles of a given component and the total moles in the combination.

We know that;

Number of moles of ethanol = 9.2/46 g/mol

= 0.2 moles

Now;

Number of moles of water = 216.0 g/18 g/mol

= 12 moles

Mole fraction of water = Number of water/ Total number of moles

0.9 = 12/12 + 0.2 + x

0.9(12.2 + x) = 12

10.98 + 0.9x = 12

x = 1.13 moles

Now;

Moles = mass/Molar mass

1.13 = x/44

x = 49.72 g

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