The chemical formula for a molecule that contains two chlorine (Cl) atoms is

Answer:

brittle crust and top is made of upper mantel

Sorry, your photo isn't clear enough.

Answer:

violet light

Explanation: ck12 says so

Answer:

B

Explanation:

Use your periodic table to find out the charge on a Fl ion if your periodic table is constructed that way. In any event, the charge on Fl when it becomes an ion is -1. I don't think it has any other charge. So all of the elements in column 17 will have at least -1 in common.

Answer:

(a) H = +1, Cr = +6, O = -2

(b) H = +1, S = +6, O = -2

(c) K = +1, Cr = +6, O = -2

(d) H = +1, N = +5, O = -2

(e) Cr = +6, O = -2

Explanation:

(a)

In H₂CrO₄

The oxidation state of Hydrogen (H) is +1

The oxidation state of Oxygen (O) is -2

To find the oxidation state of Cr,

Let the oxidation state of Cr be x

Then, (+1×2) + x + (-2×4) = 0

2+x-8 = 0

x = +6

Hence, oxidation state of Cr is +6

(b)

In H₂SO₄

The oxidation state of Hydrogen (H) is +1

The oxidation state of Oxygen (O) is -2

To find the oxidation state of Sulphur (S),

Let the oxidation state of Sulphur be x

∴ Then, (+1×2) + x + (-2×4) = 0

2+x-8 = 0

x = +6

Hence, the oxidation state of S is +6

(c)

In K₂Cr₂O₇

The oxidation state of Potassium (K) is +1

The oxidation state of Oxygen (O) is -2

To find the oxidation state of Chromium,

Let the oxidation state of Chromium be x

Then, (+1 ×2) + (x ×2) + (-2×7) = 0

+2 +2x -14 = 0

2x = +12

x = +6

Hence, the oxidation state of Chromium is +6

(d)

In HNO₃

The oxidation state of Hydrogen (H) is +1

The oxidation state of Oxygen (O) is -2

To find the oxidation state of NItrogen (N),

Let the oxidation state of Nitrogen be x

+1 + x + (-2×3) = 0

1 +x - 6 = 0

x = +5

Hence, the oxidation state of Nitrogen is +5

(d)

In Cr₂O₇²⁻

The oxidation state of Oxygen is -2

To the oxidation state of Chromium (Cr(,

Let the oxidation state of Chromium be x

Then, (2×x) + (-2×7) = -2

2x - 14 = -2

2x = +12

x = +6

Hence, the oxidation state of Chromium is +6

Answer:

B. Through a chemical reaction between iron and oxygen

Answer:B

Explanation:

It is

According to law of conservation of energy and usage of renewable resources Jill should decide to ride her bicycle from work instead of driving.

According to the law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1842.

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Answer: 2p..........................

Answer:

2p

Explanation:

Answer:

Heat Flux = - 22.5 W/m²

Explanation:

We can use Fourier's Law of Heat Conduction:

q = -kAΔT/t

q/A = -KΔT/t

where,

q/A = Heat Flux = ?

K = Thermal Conductivity = 0.3 W/m.K

ΔT = Change in Temperature = 20°C - 5°C = 15K

t = Thickness = 0.2 m

Therefore,

Heat Flux = -(0.3 W/m.k)(15 k)/(0.2 m)

Heat Flux = - 22.5 W/m²

Negative sign shows the heat flowing out of the system.

Answer:

When it asks how much heat it is required to change the temperature then it is called specific heat capacity, and when it says how much heat required TO CHANGE THE STATE then it is latent heat so here we will do by formula of

           Q = mcT

where q is heat

          m is mass

           T is change in temperature which is going to be 24 here

put all the values you will get the answer

HOPE IT HELPS!

Explanation:

as it is cation so 4+

it loses four electron

Answer:

H₂CO₃(aq) ⇄ H⁺(aq) + HCO₃⁻(aq)   K₁ = [H⁺][HCO₃⁻]/[H₂CO₃]

HCO₃⁻(aq) ⇄ H⁺(aq) + CO₃²⁻(aq)    K₂ = [H⁺][CO₃²⁻]/[HCO₃⁻]

Explanation:

Let's consider the equation for the first step of the ionization of carbonic acid.

H₂CO₃(aq) ⇄ H⁺(aq) + HCO₃⁻(aq)

The first ionization constant is:

K₁ = [H⁺][HCO₃⁻]/[H₂CO₃]

Let's consider the equation for the second step of the ionization of carbonic acid.

HCO₃⁻(aq) ⇄ H⁺(aq) + CO₃²⁻(aq)

The second ionization constant is:

K₂ = [H⁺][CO₃²⁻]/[HCO₃⁻]

Answer:

3.22m

Explanation:

c=3×10^8m/s=speed of the light

lambda= wavelength=?

frequency=?

lambda=c÷frequency

lambda=(3×10^8)÷(93.1×10^6)

lambda=3.22m

Answer: A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. ... Solutions have particles which are the size of atoms or molecules - too small to be seen.

Answer:

[tex][CH_3CHO]=0.550M[/tex]

Explanation:

Hello.

In this case, since the rate law for this chemical reaction would be:

[tex]r=\frac{d[CH_3CHO]}{dt} =-k[CH_3CHO]^2[/tex]

The integrated rate law after its demonstration is:

[tex]\frac{1}{[CH_3CHO]} =kt+\frac{1}{[CH_3CHO]_0}[/tex]

Thus, for the given rate constant, initial concentration of CH3CHO and elapsed time, the resulting concentration is:

[tex]\frac{1}{[CH_3CHO]} =6.73x10^{-5}\frac{L}{mol*s}*45.0s +\frac{1}{0.551mol/L}\\\\\frac{1}{[CH_3CHO]}=3.03x10^{-3}L/mol+1.81L/mol[/tex]

[tex]\frac{1}{[CH_3CHO]} =1.82L/mol[/tex]

[tex][CH_3CHO]=0.550M[/tex]

Best regards!

Answer:

B.

Explanation:

A chemical bond holds together attractions of atoms

Answer:

Explanation:

Let final temperature be T.

Heat lost by hot water

mass x specific heat x fall in temperature

75 x s x ( 75.7 - T )

Heat gained by cool water

= 100 x s x ( T - 23 )

heat lost= heat gained

75 x s x ( 75.7 - T )   = 100 x s x ( T - 23 )

5677.5 - 75 T= 100 T- 2300

175 T= 7977.5

T = 45.6⁰C .

The final temperature of the mixed water is 45.6 ⁰C.

The given parameters;

The final temperature of the mixture is calculated as follows;

Based on the principle of conservation of energy;

Heat lost by hot water = heat gained by the cold water

mcΔθ₂ = mcΔθ₁

75 x 4.184 x (75.7 - T) = 100 x 4.184 x (T - 23)

75 x (75.7 - T) = 100 x (T - 23)

(75.7 - T) = 1.333(T - 23)

75.7 - T = 1.333T - 30.659

75.7 + 30.659 = 1.333T + T

106.359  = 2.333T

[tex]T = \frac{106.359}{2.333} \\\\T = 45.6 \ ^0C[/tex]

Thus, the final temperature of the mixed water is 45.6 ⁰C.

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Answer:

[tex]-8.032\ \text{kJ/mol}[/tex]

Explanation:

m = Mass of mixture = 62.6 g

n = Number of mole of reactant = 0.15 mol

[tex]\Delta T[/tex] = Change in temperature = [tex]4.6^{\circ}\text{C}[/tex]

c = Specific heat of mixture = [tex]4.184\ \text{J/g}^{\circ}\text{C}[/tex] (assumed to be the same as water)

Heat generated

[tex]Q=mc\Delta T\\\Rightarrow Q=62.6\times 4.184\times 4.6\\\Rightarrow Q=1204.82\ \text{J}=1.20482\ \text{kJ}[/tex]

Heat of reaction is given by

[tex]\Delta H=-\dfrac{Q}{n}\\\Rightarrow \Delta H=-\dfrac{1.20482}{0.15}\\\Rightarrow \Delta H=-8.032\ \text{kJ/mol}[/tex]

The heat of the reaction is [tex]-8.032\ \text{kJ/mol}[/tex]

A 62.6 g-reaction mixture that contains 0.15 moles of reactant A and causes a temperature increase of 4.6 °C in a calorimeter, has a heat of reaction of -8.0 kJ/mol.

We have a reaction mixture in a calorimeter that causes a temperature increase of 4.6 °C (ΔT). We can calculate the heat absorbed by the solution (Qs) using the following expression.

[tex]Qs = c \times m \times \Delta T = \frac{4.184J}{g.\° C} \times 62.6 g \times 4.6 \° C \times \frac{1kJ}{1000J} = 1.2 kJ[/tex]

where,

According to the law of conservation of energy, the sum of the heat absorbed by the solution and the heat released by the reaction (Qr) is zero.

[tex]Qs + Qr = 0\\\\Qr = -Qs = -1.2 kJ[/tex]

1.2 kJ are released by the reaction of 0.15 moles of reactant A. The heat of the reaction, in kJ/mol, is:

[tex]\frac{-1.2kJ}{0.15mol} = -8.0 kJ/mol[/tex]

A 62.6 g-reaction mixture that contains 0.15 moles of reactant A and causes a temperature increase of 4.6 °C in a calorimeter, has a heat of reaction of -8.0 kJ/mol.

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Answer:

0.060 g

Explanation:

Hydrogen gas is made up of 2 atoms of hydrogen [tex]H_2(g)[/tex].

From the formula for calculating mole:

mole = mass/molar mass

Molar mass of hydrogen gas = 2.016 g/mol

Hence, 0.030 mole hydrogen gas would weigh:

mass = molar mass x mole

              =  2.016 x 0.030

                = 0.06048 g

The mass of hydrogen gas that participated to the correct number of significant digits is, therefore, 0.060 g

Answer:

higher-energy orbit

Answer:go in the order from top to bottom.

Ammonium chloride= NH2Cl

chlorideIron(III) nitrate=Fe(NO3)3

Titanium(III) bromide=TiBr3

Copper(I) phosphide=Cu3P

Tin(IV) Selenide=SnSe2

Gallium arsenide=GaAs

Lead(II) sulfate=Pb(SO4)3

Beryllium Hydrogen Carbonate=Be(HCO3)2

Manganese(III) Sulfite=Mn2(SO3)3

Aluminium cyanide  Al(CN)3.

Answer:

C4H4O8

Explanation:

The molecular formula of a compound with empirical formula: CHO2 can be calculated as follows:

(CHO2)n = 180g/mol

{12 + 1 + 16(2)}n = 180

(12+1+32)n = 180

(45)n = 180

n = 180/45

n = 4.

The molecular formula = (CHO2)4

= C4H4O8

blue, red, and white colors.

Explanation:

Answer:

It would be to be hammered into shapes because malleability is how flexible a metal is.

Answer:lll

I looked and lll is the only one that wont make since so it’s lll

Answer:

Almost to exactly .5 tons

Explanation:

5 tons of Aluminum oxide will produce, 2.64 tons of Aluminum.

In a mole of aluminum oxide, the total extraction will yield 2  atoms of aluminum.

Thus, 102 grams (1 mole) of aluminum oxide will give 54 grams of aluminum.

In terms of kg:

0.102 kg aluminum oxide = 0.054 kg Aluminum

5 tons aluminum oxide = 4535.92 kg of aluminum oxide

Since, 0.102 kg aluminum oxide = 0.054 kg aluminum

4535.92 kg of aluminum oxide = [tex]\rm \dfrac{0.054}{0.102}\;\times\;4535.92[/tex] kg of aluminum

4535.92 kg of aluminum oxide = 2401.37 kg of Aluminum

2401.37 kg Aluminum = 2.64 ton of Aluminum.

Thus, 5 tons of Aluminum oxide will produce, 2.64 tons of Aluminum.

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Answer:

Ability to burn

Explanation:

If you burn something, lemme tell ya, it ain't coming back.

The physical properties are properties where chemical composition is not altered thus, the correct option is C that is ability to burn as burning changes chemical composition.

Any property which describes the state of a physical system is called as a physical property.Changes in physical properties are used to describe changes between the states. They are often related to as observable properties.

Physical property which can be quantified is a physical quantity. These are also classified further with respect to their directionality. Isotropic properties do not change with direction of observation while anisotropic properties change with direction of observation.

Physical properties are differentiated from chemical properties by the way they determine how a substance behaves in a chemical reaction.

In burning the chemical composition is changed thus it is not a physical property.Thus, correct option is C.

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