The images below shows an electron orbital diagram for a
specific element. What is the element? (Hint: count the
number of arrows-- what do they represent?)

1) The metal which reduces the other compound is the one higher in the reactivity. So in this case it is [tex] \mathrm{Zn}[/tex].

2) The substance which brings about reduction while itself getting oxidised (that is losing electrons) is called a reducing agent. Here, $\mathrm{Zn}$ is the reducing agent and reduces Cobalt Oxide to Cobalt while itself getting oxidised to Zinc oxide.

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1

Explanation:

By far, the most common ion of group 13 metals are 3+ .

So the common gallium ion is Ga³+ and it's electron configuration is [Ar] 3d10.

Hope it helps.

We can see here that the correct electron configuration of the gallium ion (Ga^3+) is: 1s^2 2s^2 2p^6 3s^2 3p^6

Electron configuration refers to the distribution of electrons in the electron shells and subshells of an atom. It is a fundamental concept in atomic structure and describes how electrons occupy specific energy levels around the nucleus of an atom.

When gallium loses three electrons to form a +3 ion (Ga^3+), it becomes a cation. The electron configuration of a neutral gallium atom is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^1.

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Answer:

RCOOR

Explanation:

Odyssey ware

RCOOR is the functional group for an ester. An ester is an organic molecule created when an acid and an alcohol interact. The general structure of the compound is RCOOR, where R is an aryl or alkyl group.

This functional group is made up of an alkyl or aryl group (R) and a carbonyl group (C=O) linked to an oxygen atom. Two additional carbon atoms, one of which is a member of the carbonyl group and the other of which is a member of the alkyl or aryl group, are joined to the oxygen atom.

The connection between the oxygen atom and the hydrogen atom of the acid is broken during the interaction of an acid with an alcohol to create an ester.of a fresh connection between the oxygen atom and the alcohol's alkyl or aryl group. As a result, the RCOOR functional group is created.

Esters are significant organic substances with many different uses. They serve as solvents and are employed in the synthesis of flavours, perfumes, polymers, medicines, and other products. They are also employed in the creation of fragrances and cosmetics, as well as as lubricants. Other organic compounds can be made using esters as intermediates.

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Answer:

3.79 g of N2.

Explanation:

We'll begin by writing the balanced equation for the reaction.

This is given below:

4NH3 + 3O2 → 2N2 + 6H2O

Next, we shall determine the mass of O2 that reacted and the mass of N2 produced from the balanced equation.

This is illustrated below:

Molar mass of O2 = 16x2 = 32 g/mol

Mass of O2 from the balanced equation = 3 x 32 = 96 g

Molar mass of N2 = 2x14 = 28 g/mol

Mass of N2 from the balanced equation = 2 x 28 = 56 g

Summary:

From the balanced equation above,

96 g of O2 reacted to produce 56 g of N2.

Finally, we shall determine the mass of N2 produced by reacting 6.50 g of O2.

This can be obtained as follow:

From the balanced equation above,

96 g of O2 reacted to produce 56 g of N2.

Therefore, 6.50 g of O2 will react to produce = (6.50 x 56)/96 = 3.79 g of N2.

Therefore, 3.79 g of N2 were obtained from the reaction..

Answer:

The uncertainty principle

Explanation:

Essentially if you measure the momentum of the particle at a given point, then when you go to measure the position it has moved, thus you don't know the position. Vise versa if you measure the position you only capture a still frame of the particle and no information about it's momentum, which will have changed.

Answer: the uncertainly principle

Explanation:

it basically states you can not know both at the same time

Answer:

they produce water and a neutral ionic compound called a salt. The reaction is called a neutralization reaction.

Explanation:

Answer:

6.4

Explanation:  pH

+

pOH

=

14

So if  

pH

=

7.6

then  

pOH

=

14

−

pH

=

6.4

Explanation:

Wrote this out spaced so it's more clear.

Answer:

The enthalpy of the reaction asked is -284 kJ/mol.

Explanation:

Given:

[tex]C(s) + \frac{1}{2}O_2(g)\rightarrow CO(g), \Delta H_1 = -111 kJ/mol [/tex]..[1]

[tex]C(s) + O_2(g)\rightarrow CO_2(g) \Delta H_2 = -395 kJ/mol[/tex]...[2]

To find ; [tex]\Delta H_{rxn}[/tex] of following reaction :

[tex]CO(g) + \frac{1}{2}O_2(g)\rightarrow CO_2(g), \Delta H_{rxn} =?[/tex]..[3]

Using Hess's Law:

[2] - [1] = [3]

[tex]\Delta H_{rxn}=\Delta H_2-\Delta H_1=-395 kJ/mol-(-111 kJ/mol)=-284 kJ/mol[/tex]

The enthalpy of the reaction asked is -284 kJ/mol.

Answer:

The answer to your question is given below

Explanation:

In this reaction, the calcium metal, Ca loses two electrons to form calcium ion, Ca^2+ and two fluorine atoms, F receives the two electrons to form two fluoride ion, F^-.

This is illustrated by the following equation:

Ca —> Ca^2+ + 2e

2F + 2e –> 2F^-

Ca + 2F + 2e —> Ca^2+ + 2F^- + 2e

Cancel out 2e

Ca + 2F —> Ca^2+ 2F^-

Thus, the electronic configuration can be written as follow:

Before combination:

Calcium, Ca (20) => 2, 8, 8, 2

Two fluorine atom, F (9) => 2, 7 and 2, 7

After combination:

Calcium ion, Ca^2+ => 2, 8, 8

Two fluoride ion, F^- => 2,8 and 2,8

Answer:

The final temperature of the bomb calorimeter is 82.98°C

Explanation:

The given information are;

The mass of the propane sample =  10.0 g

The heat capacity of the bomb calorimeter = 8.0 kJ/°C

The molar heat of combustion of propane is -2,222 kJ/mol.

The starting (initial) temperature of the water, T₁ = 20°C

The final temperature of the bomb calorimeter = T₂

The molar mas of propane = 44.1 g/mol

The number of moles, n, of propane present in 10.0 g of propane is found as follows;

[tex]Number \ of \ moles \ of \ propane, \ n = \dfrac{Mass \ of \ propane}{Molar mass \ of \ propane} = \dfrac{10}{44.1} = 0.227 \ moles[/tex]Which gives;

The heat, Δh, released from the combustion of 10.0 g of propane = 0.227 × -2222 kJ/mol  

Δh = -503.85 kJ/mol  

Heat gained by the calorimeter = Heat released from the combustion of 10.0 g of propane = 503.85 kJ/mol  

Change in heat, Δh[tex]_c[/tex] in the calorimeter = Heat capacity × Temperature change

Δh[tex]_c[/tex] = m × C

503.85 kJ/mol = 8.0 kJ/°C × (T₂ - 20°C)

T₂ = -503.85 kJ/mol/(8.0 kJ/°C) + 20°C = 82.98°C

The final temperature of the bomb calorimeter = 82.98°C

Answer:

Correct, because B it is reported to the nearest miligram

Explanation:

4.6 rounded up is 5

Answer:

Explanation:

a )

3NO₂(g) + H₂O(l) — -→ 2HNO₃(aq) + NO(g)

3 x 46 g       18 g            2 x 63 g       30 g

138 g of NO₂ requires 18 g of H₂O

28 g of NO₂ requires ( 18 / 138) x 28

= 3.65 g of H₂O.

b )

18 g of H₂O produces 30 g of NO gas

15.8 g of H₂O produces ( 30/18 ) x 15.8

= 26.33 g of NO gas .

c )

138 g of NO₂ produces 126 g of HNO₃

8.25 g  of NO₂ produces (126 / 138 ) x 8.25

= 7.53 g of HNO₃

Answer:

Four ways to test a copper penny are given below:-

Explanation:

Answer:

b. is the simplest ratio of ions that balances total charge.

Explanation:

Hope it helps.

We can see here that a formula unit of an ionic compound is: b. is the simplest ratio of ions that balances total charge.

An ionic compound is a type of chemical compound that is formed through the bonding of ions, which are charged particles. These compounds are made up of positively charged ions, known as cations, and negatively charged ions, known as anions, which are held together by electrostatic forces of attraction.

Ionic compounds play significant roles in various applications, including inorganic chemistry, materials science, and industrial processes.

Thus, Option B is the correct answer.

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Answer:

Original temperature (T1) = - 37.16°C

Explanation:

Given:

Gas pressure (P1) = 2.75 bar

Temperature (T2) = - 20°C

Gas pressure (P2) = 1.48 bar

Find:

Original temperature (T1)

Computation:

Using Gay-Lussac's Law

⇒ P1 / T1 = P2 / T2

⇒ 2.75 / T1 = 1.48 / (-20)

⇒ T1 = (2.75)(-20) / 1.48

⇒ T1 = -55 / 1.48

⇒ T1 = - 37.16°C

Original temperature (T1) = - 37.16°C

Answer: it’s S

Explanation:

The element with electronic configuration of 1s²2s²2p⁶3s²3p⁴ is sulphur (S)

The correct answer to the question is Option C. S

Electronic configuration is simply defined as the arrangement of electrons around the nucleus of an atom.

With the electronic configuration of an element, we can obtain the name of the element by simply obtaining the total number of electrons in the shells and comparing it with those in the periodic table.

From the question given above,

Electronic configuration => 1s²2s²2p⁶3s²3p⁴

Total electron = 2 + 2 + 6 + 2 + 4 = 16

Thus, the element has 16 electrons. This is assumed to be atomic number of the element.

Comparing the atomic number of the element (i.e 16) with those in the periodic table, the element is Sulphur with the symbol S.

Therefore, the element with electronic configuration of 1s²2s²2p⁶3s²3p⁴ is sulphur (S)

Option C. S gives the correct answer to the question.

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Answer: Fossils of the species have never been found because:-

a. There were few members of the species.

d. Their bodies decompose quickly.

For an organism to become fossil it is important that it do not decompose before it get buried by sediments.

What are fossils?

A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age.

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Answer: The answer is B and A.

Explanation:

I took the test!

Answer:

The second on, A man who works as a computer programmer and sits at desk magority of the day.

Explanation:

Answer:

Explanation:

The only answer I can think as being possible is the last one. Pesticides are chemicals that go after unwanted animal life. They do not know that they should not attack human beings.

Infertility could very well be one of the side effects of a pesticide. There are others as well. Some pesticides go after the central nervous system (think mice and rats) and those are dangerous to use and to leave around.

The others all involve occupations that either require authentic abilities or mental astuteness. Neither should affect a man's ability to reproduce.

Answer:

86.5%

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

2Na + 2HF –> 2NaF + H2

Next, we shall determine the theoretical yield of the hydrogen gas, H2. This is illustrated:

From the balanced equation above,

2 moles of Na reacted to produce 1 mole of H2.

Therefore, 5.75 moles of Na will react to produce = (5.75 x 1)/2 = 2.88 moles of H2.

Therefore, the theoretical yield of Hydrogen gas, H2 is 2.88 moles.

Finally, we shall determine the percentage yield of Hydrogen gas, H2. This can be obtained as follow:

Actual yield of H2 = 2.49 moes

Theoretical yield of H2 = 2.88 moles

Percentage yield of H2 =.?

Percentage yield = Actual yield /Theoretical yield x 100

Percentage yield = 2.49/2.88 x 100

Percentage yield = 86.5%

Therefore, the percentage yield of Hydrogen gas, H2 is 86.5%.

Answer:

3

Explanation:

Data obtained from the question include:

Concentration of NO, [NO] = 0.1M

Concentration of NOBr, [NOBr] = 0.1M

Concentration of Br, [Br2] = 3M

Equilibrium constant, Kc =..?

The equilibrium constant, Kc is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.

Thus, the equilibrium constant, Kc for reaction can be obtained as follow:

2NOBr <==> 2NO + Br2

Kc = [NO]² [Br2] /[NOBr]²

[NO] = 0.1M

[NOBr] = 0.1M

[Br2] = 3M

Kc =..?

Kc = [0.1]² [3] /0.1]²

Kc = 3

Therefore, the equilibrium constant Kc, for the reaction is 3.

Answer:

3

Explanation:

Answer:  1.5

Explanation:

The pH of a solution is given by the formular; pH = - log [ H+ ]. Therefore, for  H2SO4, it is;

pH = - log [ 3 x 10 ∧ -2]

     =  2   - log 3

     =  2 - 0.4771 = 1.5 approximately

a) The change here is that metallic iron is converted into ions and copper is deposited. This is called a displacement reaction.

b) [tex] \text{Fe}[/tex] is oxidised in this reaction.

c)$ \mathrm{Fe_{(s)}+ CuSO_{4(aq)} \rightarrow FeSO_{4(aq)} + Cu_{(s)}}$

Answer:

0.04 L

Explanation:

The following data were obtained from the question:

Concentration of stock solution (C1) = 18M

Volume of stock solution needed (V1) =?

Concentration of diluted solution (C2) = 1.5M

Volume of diluted solution (V2) = 0.5L

The volume of the stock solution needed can be obtain by using the dilution formula.

This is illustrated below:

C1V1 = C2V2

18 x V1 = 1.5 x 0.5

Divide both side by 18

V1 = (1.5 x 0.5)/18

V1 = 0.04L

Therefore, the volume of the stock solution needed is 0.04L.

Answer:

B

Explanation:

Answer:

Gravity drives all mass wasting.

Explanation:

Mass wasting can be defined as the process of wasting away of earth's outer crust. This movement is also known as slope movement that causes large rock, soil, and debris to move downward, a force driven by gravity.

The term is often used interchangeably with landslide yet it is different. It is also known as mass movement as is cause massive downslope movement of rock, regolith, snow, ice, and-the-like on the earth's outer crust.

All these movements are driven mainly by gravity. Gravity consantly tries to pull the rocks and soil down the slope but the resisting power. also known as shear strength, of moutains helps them to deny the gravitional force.

Thus from the given options the statement that can be said to be true about mass wasting is that mass wasting is driven by gravity. So, the correct option is C.

Answer:

C. Gravity drives all mass wasting.

Explanation:

Plato answer

Answer:

2 boxes

Explanation:

==>Given that:

Box A = 10 grams

Box B = 5 grams

Box C= 1 A and 1 B = 15 grams

==>Required:

Number of boxes of B that would make 30 grams of C

==>Solution:

We know that, 1 box of B would give us 15grams of of C when mixed in the right proportion with 1 box of A.

thus,

1 box of B => 15 grams of C

x box of B => 30 grams of C

Therefore x = (30*1)/15

x = 30/15

x = 2

2 boxes of B would be required to make 30 grams of C

Answer:

depends

Explanation:

because different chemicals can react they all have different ways of showing a reaction. an example is  given: color, odor, texture  weight solidity

Answer:

U will know there is a chemical reaction, when  light, heat, color change, gas production, odor, or sound. The starting and ending materials of a physical change are the same

Explanation:

Answer:

controlled variable is a variable that is kept constant during a controlled experiment and covalent bond is a chemical bond formed when two atoms share electrons.

Explanation:

Answer:

53J

Explanation:

Total Energy is the sum of Kinetic energy and potential energy.