The diagram below shows part of the rock cycle.
Science, Middle school`
Which type of rock does C represent?

A. Igneous Rock
B. Rock formed by cooling
C. Rock formed by heat and pressure
D. Sedimentary Rock

I searched what each rock is called and looks like but I don't which on it is because they kinds all look the same.

How atoms interact with other atoms is largely dependant on the number of electrons on its outermost layer. The electrons on this layer are called valence electrons.

As you might know, atoms have their electrons arranged in layers/shells, starting at k, l m, n etc. Each layer has a maximum number of electrons it can accommodate, with the outermost one being the valence shell. The first layer (k) can accomodate 2 electrons, the second one (l) can accomodate 8, as can the third one (m) etc.

As a rule of thumb, most atoms don't like being alone. These atoms have a valence shell that isn't saturated. This is the case for hydrogen(1), with one free slot in its outter shell.

However, atoms like helium are a bit different. They are inert, and don't need to bond with other atoms. This is because their valence shell is saturated. In this case, helium saturated the k shell with 2 electrons. Helium in this form will not form bonds.

However, hydrogen is still out there looking for buddies. Hydrogen will bind with any other atom with a free electron. Being extremely common, it's likely that said atom will be another hydrogen.

However, another common example would be for 2 hydrogens to bond with one oxygen, forming h2O (oxygen can form 2 bonds)

Conclusion : helium is inert and will not interact with other atoms. Hydrogen is not, and thus needs to bond with other atoms.

Answer:

Answer would be 4/2

Explanation:

A is the best answer choice because it was between A and D but 2 is not the denominator so it couldnt be D

Fe + O2 → Fe2O3 four over two fractions can be used for the mole ratio to determine the mass of Fe from a known mass of Fe2O3. Therefore, option A is correct.

The mole ratio is a conversion factor that is derived from the coefficients of the compounds in a balanced equation. As a result, the mole ratio is used to convert between quantities of compounds in a chemical reaction.

Using the atomic masses, convert the mass of each element to moles of each element. Divide the number of moles of each element by the smallest number of moles to find the ratio or moles of each element.

Four over two is the best answer choice because it was between A and D, but 2 is not the denominator, so it couldn't be D.

Thus, four over two fractions can be used for the mole ratio to determine the mass of Fe from a known mass of Fe2O3, option A is correct.

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Answer:

B.) Dull

C.) Poor conductors

D.) Brittle

Answer:

Explanation:

mass of carbon in 10.27 g of CO₂ = 12 x 10.27 / 44 = 2.80 g

mass of hydrogen ( H ) in 3.363 g of H₂O = 2  x 3.363 / 18

= .373 g

These masses would have come from the sample of 6.165 g .

Rest of 6.165 g of sample is oxygen .

So oxygen in the sample = 6.165 - ( 2.8 + .373 ) = 2.992 g

Ratio of C  , H , O in the sample

2.8 : .373 : 2.992

C: H : O : : 2.8 : .373 : 2.992

Ratio of moles

C: H : O : : 2.8/12 : .373/1 : 2.992 / 16

C: H : O : : .2333 : .373 : .187

C: H : O : : .2333/.187 : .373/.187 : .187/.187

C: H : O : : 1.247 : 1.99 : 1

C: H : O : : 5 : 8 : 4 ( after multiplying by 4 )

Hence empirical formula

C₅H₈O₄

Molecular formula ( C₅H₈O₄ )n

n ( 5 x 12 + 8 x 1 + 4 x 16 ) = 132

n x ( 60 + 8 + 64 ) = 132

n = 1

Molecular formula = C₅H₈O₄.

Answer:

See explanation.

Explanation:

Hello!

In this case, these three equations show how the molecule behaves in terms aqueous and solid species; thus, we first write balanced conventional equation:

[tex]Ca I_2 (aq) + K_2 C_2 O_4 (aq)\rightarrow CaC_2O_4(s)+2KI(aq)[/tex]

Whereas the solid product is CaC₂O₄ based off its low solubility. Next, we ionize the aqueous species to obtain the total ionic equation:

[tex]Ca^{2+} +2I^- + 2K^+ +(C_2 O_4)^{2-} \rightarrow CaC_2O_4(s)+2I^- + 2K^+[/tex]

Finally, we cancel out potassium and iodide ions as they are the spectator ions due to their presence at both reactants and products in order to obtain the net ionic equation:

[tex]Ca^{2+} (aq) +(C_2 O_4)^{2-}(aq) \rightarrow CaC_2O_4(s)[/tex]

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the formula is heard and difficult to solve

Answer:

b. 0.22 L

Explanation:

Step 1: Write the balanced equation

4 HNO₃(l) ⇒ 4 NO₂(g) + 2 H₂O(l) + O₂(g)

Step 2: Calculate the moles corresponding to 2.5 g of HNO₃

The molar mass of HNO₃ is 63.01 g/mol.

2.5 g × 1 mol/63.01 g = 0.040 mol

Step 3: Calculate the moles of O₂ produced from 0.040 moles of HNO₃

The molar ratio of HNO₃ to O₂ is 4:1. The moles of O₂ produced are 1/4 × 0.040 mol = 0.010 mol.

Step 4: Calculate the volume corresponding to 0.010 moles of O₂

Assuming the reaction takes place at standard temperature and pressure, the volume of 1 mole of O₂ is 22.4 L.

0.010 mol × 22.4L/1 mol = 0.22 L

Answer:

Uiiikjhb+2

Explanation:

I’m gonna swinggggggf

Answer:

Everything in the universe that we can detect is either matter or energy.

Everything in the universe that we can detect is either matter or energy.

Energy exists in the capacity of a physical system to do work. The common symbol for energy exists in the uppercase letter E. The standard unit stands for the joule, symbolized by J. One joule (1 J) exists as the energy resulting from the equivalent of one newton (1 N) of force operating over one meter (1 m) of displacement.

A matter is referred as a substance having a certain mass and  can take up a certain volume in the space. For example pen, pencil, toothbrush, water, milk are matters as well as car, bus, bicycle is also a matter. So matter is considered as a living thing and a non-living thing.

Energy, is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms.

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Answer:

What is the main purpose of the curiosity rover ?

Explanation:

Curiosity's mission is to determine whether the Red Planet ever was, or is, habitable to microbial life. The rover, which is about the size of a MINI Cooper, is equipped with 17 cameras and a robotic arm containing a suite of specialized laboratory-like tools and instruments.

Answer:

Curiosity's mission is to determine whether the Red Planet ever was, or is, habitable to microbial life. The rover, which is about the size of a MINI Cooper, is equipped with 17 cameras and a robotic arm containing a suite of specialized laboratory-like tools and instruments.

Answer:

Formation of a solid indicates a chemical reaction occurred.

True

Explanation:

A chemical reaction is said to have occurred when a new substance(s) is (are) formed.

When we mix the sodium nitrate and sodium chloride, the following chemical reaction occurs;

2AgNO3(aq) + 2NaCl(aq) ------> 2AgCl(s) + 2NaNO3(aq)

The appearance of a solid shows that a chemical reaction has occurred and that NaCl really reacted chemically with AgNO3.

Answer:

a and b

Explanation:

The element with the smallest atomic number is hydrogen

A chemical element's atomic number is its position in the periodic system, which places the elements in ascending order of the number of protons in their nuclei. As a result, the atomic number is also determined by the number of protons, which is always equal to the number of electrons in a neutral atom.

The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number. This is the number of protons present in the nucleus of each atom of that element, or the proton number, for conventional nuclei. The atomic number of common chemical elements can be used to uniquely identify certain elements.

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Answer:

See explanation

Explanation:

Number of moles of each gas is

Nitrogen = 15/28 = 0.536 kmoles

Helium = 5/4  = 1.25 kmoles

Methane = 60/16 = 3.75 kmoles

Ethane =    20/30 = 0.67 kmoles

Total number of moles =  0.536 kmoles + 1.25 kmoles + 3.75 kmoles +  0.67 kmoles = 6.206 kmoles

Mole fraction of each gas;

Nitrogen = 0.536 kmoles/6.206 kmoles = 0.086

Helium = 1.25 kmoles/6.206 kmoles = 0.201

Methane = 3.75 kmoles/6.206 kmoles =0.604

Ethane = 0.67 kmoles/6.206 kmoles =0.108

Partial pressure of each gas;

Nitrogen = 0.086 * 1200 kPa = 103.2 kPa

Helium = 0.201 * 1200 kPa = 241.2 kPa

Methane = 0.604 * 1200 kPa = 724.8 kPa

Ethane = 0.108 * 1200 kPa = 129.6 kPa

Apparent specific heat at constant pressure;

Cp = (0.15 * 1.039) + (0.05 * 5.1926) + ( 0.6 * 2.2537) + (0.2 * 1.7662)

Cp = 2.12 KJ Kg-1 K-1

Cv = Cp- Ru/M

Cv= 2.12 - 8.314/16.12 = 1.604 KJ Kg-1 K-1

Answer:

a. non. point source pollution

Explanation:

also known as NPS pollution

The question is incomplete, the complete question is found in the image attached to this answer

Answer:

This structure is correct due to the total number of bonds and electrons.

Explanation:

We know that all atoms in a compound are expected to obey the octet rule and we use this rule to ascertain the correctness of any chemical structure.

The structure of carbon IV oxide drawn perfectly satisfies the octet rule for each atom. Each atom in the molecule has eight electrons around its valence shell.

Therefore,since CO2 has sixteen valence electrons, we can conclude that; this structure is correct due to the total number of bonds and electrons.

Answer:

d) 2792.8 J

Explanation:

Answer:

Explanation:

From the information given:

Mass of carbon tetrachloride = 5 kg

Pressure = 1 bar

The given density for carbon tetrachloride = 1590 kg/m³

The specific heat of carbon tetrachloride =  0.84 kJ/kg K

From the composition, the initial volume of carbon tetrachloride will be:[tex]= \dfrac{5 \ kg }{1590 \ kg/m^3}[/tex]

= 0.0031 m³

Suppose [tex]\beta[/tex] is independent of temperature while pressure is constant;

Then:

The change in volume can be expressed as:

[tex]\int ^{V_2}_{V_1} \dfrac{dV}{V} =\int ^{T_2}_{T_1} \beta dT[/tex]

[tex]In ( \dfrac{V_2}{V_1}) = \beta (T_2-T_1)[/tex]

[tex]V_2 = V_1 \times exp (\beta (T_2-T_1))[/tex]

[tex]V_2 = 0.0031 \ m^3 \times exp (1.2 \times 10^{-3} \times 20)[/tex]

[tex]V_2 = 0.003175 \ m^3[/tex]

However; the workdone = -PdV

[tex]W = -1.01 \times 10^5 \ Pa \times ( 0.003175 m^3 - 0.0031 \ m^3)[/tex]

W = - 7.6 J

The heat energy Q = Δ h

[tex]Q = mC_p(T_2-T_1)[/tex]

[tex]Q = 5 kg \times 0.84 \ kJ/kg^0 C \times 20[/tex]

Q = 84 kJ

The internal energy is calculated by using the 1st law of thermodynamics; which can be expressed as;

ΔU = ΔQ + W

ΔU = 84 kJ + ( -7.6 × 10⁻³ kJ)

ΔU = 83.992 kJ

Answer:

I am assuming you want it balanced?

НЗРО4 +

3KOH ->

3Н2О +

KЗРО4

Explanation:

Answer:

The flame colour of strontium is red. Red has a wavelength of around 620 to 750 nm.

Explanation:

Visible light is part of the electromagnetic spectrum. The electromagnetic waves are composed of electric and magnetic fields.

The visible spectrum is composed of seven different wavelengths that corresponds to different colours. When a metallic element is exposed flame, one of these colours is observed. This is commonly called the flame test.

The flame colour of strontium is red. Red has a wavelength of around 620 to 750 nm.

The approximate wavelength of light (nm) emitted by strontium when it was burned is red, where red has a wavelength of round 620-750 nm.

Generally, Visible mild is phase of the electromagnetic spectrum. the electromagnetic waves are composed of electric powered and magnetic fields. When a metal factor is uncovered flame, one of they seven colors of visible spectrum is seen.

The flame shade of strontium is red, where red has a wavelength of round 620-750 nm.

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Answer:

When electrons move to a lower energy level.

Explanation:

Answer:

2nd option is the correct answer of this question

Answer:

yes it is b

Explanation:

Answer:

Gasification refers to the conversion of coal to a mixture of gases, including carbon monoxide, hydrogen, methane, and other hydrocarbons, depending on the conditions involved.

Answer:

118.776 mmHg

Explanation:

The equation of the reaction is;

C4H10(g) + 13/2 O2(g) ------> 4CO2(g) + 5H20(g)

Now the mole ratio  according to the balanced reaction equation is;

1 : 6.5 : 4 : 5

Hence, the total number of moles present = 1 + 6.5 + 4 + 5 = 16.5 moles

Mole fraction of water vapour = 5/16.5 = 0.303

We also know that;

Partial pressure= mole fraction * total pressure

Partial pressure of H20(g) = 0.303 *  392 mmHg = 118.776 mmHg

The pressure (in mmHg) of water vapor is 118.78 mmHg

Butane reacts with oxygen according to the following equation

2C₄H₁₀ + 13O₂ —> 8CO₂ + 10H₂O

Mole fraction = mole / total mole

Mole fraction of water = 10 / 33

Mole fraction of water = 0.303

Partial pressure = mole fraction × total pressure

Partial pressure of water = 0.303 × 392

Partial pressure of water = 118.78 mmHg

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Answer:

Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.

Explanation:

Answer:isothermic

Explanation:

Answer:

Energy abosorbed = Energy released.

Thus ISOTHERMIC

Answer:

455.6 kJ.

Explanation:

Hello there!

In this case, according to the given reaction, we know that 2 moles of NO require 43 kcal of energy, thus, for the energy required by 150 g of NO we first need the moles, considering its molar mass (30.01 g/mol):

[tex]152g*\frac{1mol}{30.01g} =5.065mol[/tex]

Thus, we apply the following dimensional analysis to obtain the energy absorbed by 5.065 moles:

[tex]5.065mol*\frac{43kcal}{2mol} =108.9kcal[/tex]

Which kJ turns out:

[tex]108.9kcal*\frac{4.184kJ}{1kcal}\\\\455.6kJ[/tex]

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