Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below.

Answers

Answer 1

Can you please add a picture of the case??


Related Questions

What is the IUPAC name for N2O? mononitrogen dioxide dinitrogen monoxide nitrogen oxide nitrous oxide.

Answers

The IUPAC name for N2O is nitrous oxide.

The IUPAC name with the full meaning (International Union of Pure and Applied Chemistry) is a system of naming chemical compounds by chemical scientists.

The given IUPAC name to N2O is nitrous oxide. Nitrous oxide is commonly known as the laughing gas is a colorless gas with a pleasant, sweetish odor and taste that, when breathed, causes placidity to pain.

Nitrous oxide has several medicinal applications due to its anesthetic and pain-relieving properties, and it can be given by Medical professionals.

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What is the IUPAC name for N2O?

B. dinitrogen monoxide

What is the common name for N2O?

D. nitrous oxide

Explain how magnesium is produced at the negative electrode in experiment 1.

Answers

The liquified (/molten) MgCl₂ dissociates into Mg²⁺ and Cl⁻ ions;

The Cl⁻ ions are drawn to the positive electrode (which has a deficit of electrons) where they deposit electrons since they are negatively charged;

This yields Cl atoms (these will form Cl₂ gas by covalent bonding and bubbles will be seen as this gas rises out of the liquid and it will enter the air);

These electrons will flow from the positive electrode to the negative electrode;

The Mg²⁺ ions, conversely, will be drawn to the negative electrode or cathode (which has a surplus of electrons partly from those the Cl⁻ ions lose) where they pick up electrons since they have a positive charge;

This yields pure magnesium.

The magnesium has been produced with the application of electric current for the production of ions that accumulate at the electrodes.

The setup has been for the electrochemical process. The sample in the molten state has been applied with the electric current. The current results in the dissociation of the sample into ionic constituents.

The opposite charge attracts negative charge. Thus, the negative ion moves towards the positive electrode, and negative ion move towards the positive electrode. The accumulation of ions has been obtained from the electrodes.

The magnesium chloride under the influence of electric field has been converted into the positive Mg ions and negative Cl ions. The positive Mg ion will move towards the negative electrode, and thus Mg has been produced.

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How does vapor pressure affect intermolecular forces.

Answers

Answer:

it is directly related to the intermolecular forces present between its molecules

ROUND FINAL ANSWER TO 2 DECIMAL PLACES AND DO NOT INCLUDE A UNIT 675 mL of a gas at a pressure of 1.5atm is compressed to 345 mL. What is the new pressure of the gas?​

Answers

This problem is providing the initial volume and pressure of a gas as 675 mL and 1.5 atm and then mentions the final volume as 345 mL and asks for the new pressure of the gas.

Thus, we start off this problem by recalling the concept of Boyle's law as an inversely proportional relationship between pressure and volume:

[tex]P_1V_1=P_2V_2[/tex]

In which we solve for the final pressure, [tex]P_2[/tex] as shown below:

[tex]P_2=\frac{P_1V_1}{V_2} \\\\\\P_2=\frac{675mL*1.5atm}{345mL} \\\\\\P_2=2.93atm[/tex]

Considering we had to cancel out the milliliters to obtain atm as units of pressure.

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If a certain person has a mass of 250kg on earth, would that person's mass be on the moon, if the moon's gravity is 1.62m/s2? *
245kg x 1.62m/s2
245 x 1.62m/s2
It remains the same
The person would be weightless

Answers

Answer:

it remains the same

Explanation:

mass is like name is not changed any where mass express the amount of matter in an object which is fixed any where regardless its gravity

T or F: Lone pairs around the oxygen atom of a water molecule play no role in determining its molecular geometry?

Answers

Answer:

Explanation:

They play a very important part. The geometry is not a straight line. It is an angle over 90 which means that the molecule has the same general shape as a boomerang. The two hydrogens and the 2 lone electron pairs try to get away as far as possible from each other. The actual shape results in a tetrahedron shape. But the two hydrogens and 1 oxygen actually look like the aforementioned boomerang.

An alpha particle is equivalent to the nucleus of an atom of which element?(1 point)
A hydrogen
B helium
C nitrogen
D carbon
ill mark brainliest!!!

Answers

Answer: An alpha-particle is identical to the nucleus of a normal (atomic mass four) helium atom i.e. a doubly ionised helium atom. Alpha particles (also termed alpha radiation or alpha rays) was the first nuclear radiation to be discovered, beta particles and gamma rays were identified soon after.

Answer: D. Carbon

Explanation: Because I said so.

Hope this helps.

Explain why photosynthesis is essential for living plants and animals.​

Answers

The main reason why photosynthesis is essential for living and animals because photosynthesis allows plants to make glucose, which is need to make energy and cellular structures. Photosynthesis is also the main source of food on earth. It release oxygen which is an important element for survivals

I need help with one paragraph. (About the image)

Answers

Answer:

hi im just trying to get points lol hope u got ur answer

Explanation:

I say go with answer D step by step explainafion

How many moles of atoms are in 3.00 g of 13^C?

Answers

Answer:

1) 1.39 * 10²³ atoms

Explanation:

What is Most likely true about forensic scientist

Answers

Answer:

They collect all of the evidence for cases

Explanation:

What is the function of tendons?

Answers

Answer:

A tendon is a fibrous connective tissue that attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure.

Explanation:

Nitric acid reacts with zinc oxide.
State the names of the products of this reaction.
……………..and ....……..

Answers

Answer:

Zinc reacts with concentrated Nitric acid to produce Zinc nitrate, nitrogen dioxide and water.

That's all I know, sorry if it isnt coplete or the answer you wher looking for.

Given that E°red = -0.40 V for Cd2+/Cd at 25°C, find E° and E for the concentration cell expressed using shorthand notation below.

Cd(s) ∣ Cd2+(1.0 × 10-5 M) ∣∣ Cd2+(0.100 M) ∣ Cd(s)

E° = 0.00 V and E = +0.12 V


E° = 0.00 V and E = +0.24 V


E° = -0.40 V and E = -0.16 V


E° = -0.40 V and E = -0.28 V

Answers

From the information in the question, the   and E for the cell is 0.00 V and 0.12 V.

Using the Nernst equation;

Ecell =  E°cell - 0.0592/n log Q

We know that  E°cell = 0.00 V since the anode and cathode are both made up of cadmium.

Substituting the given values into the Nernst equation;

Ecell = 0.00 V - 0.0592/2 log (1.0 × 10-5 M/0.100 M)

Ecell =  0.00 V - 0.0296 log(1 × 10^-4)

Ecell = 0.12 V

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When a substance changes from a solid to a liquid, is a new substance made?

Answers

Answer:

no

Explanation:

it means melting or fusion so yhe answer is no

A substance changes from a solid to a liquid no its is not the formation of new substance. It is the change of state of the matter.

What are the states of matter?

The states of matter can be defined as one of the several configurations in which matter can exist.

There are basically three states of matter.

Solid -  It is defined as hard, distinct in volume and shape. Atoms and molecules are joined together to form solids.Liquid - It is defined as defined volume with the ability to flow and change shape. Atoms and molecules are only weakly bound together in liquids.Gases - It is defined as no clear shape or volume.

Thus, a  substance changes from a solid to a liquid no its is not the formation of new substance. It is the change of state of the matter.

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Rank the following molecules (1st, 2nd, 3rd, 4th) in the order that they melt.



Sucrose

Iodine

Sodium

Paraffin


There is a picture attached

Answers

Sodium chloride has the highest melting point while iodine has the least melting point.

The melting points of solid substances depends on the nature of intermolecular forces that exists in the substance. The stronger the magnitude of intermolecular forces in a substance, the higher its melting point.

The order of melting points of the solids shown in question is as follows;

1st - Sodium chloride2nd - sucrose3rd - paraffin4th - Iodine

Sodium chloride has the highest melting points because it is an ionic substance. Among the molecular sucrose and paraffin, sucrose has a higher melting point than sucrose because it has a greater molar mass. Iodine, a molecular substance has the least molar mass and the least melting point in the list.

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blank are produced when atoms if the elements in group 7A blank an electron​

Answers

Answer:

Halide ions are produced when atoms of elements in Group 7A gain an electron.

Explanation:

can you write the answer for lot of points ​

Answers

Work=2400JDisplacement=6m

[tex]\\ \sf\longmapsto Work=Force\times Displacement [/tex]

[tex]\\ \sf\longmapsto Force=\dfrac{Work}{Displacement}[/tex]

[tex]\\ \sf\longmapsto Force=\dfrac{2400}{6}[/tex]

[tex]\\ \sf\longmapsto Force=400N[/tex]

If i initially have a gas with a pressure of 84 kpa and a temperature of 350 c and i heat it an additional 230 degrees, what will the new pressure be? assume the volume of the container is constant.

Answers

Answer:

67.824

Explanation:  You want to use the combined gas law equation (P1*V1)/(n1*T1)=(P2*V2)/(n2*T2). So first cross out what remains constant, so volume(V) and I assume moles (since it was not mentioned as a change). Then you can solve algebraically for the answer!

Hope this helped!

The new pressure will be 139.2 kpa .

What is the combined Gas Law?

According to combined gas law,

[tex]\rm\dfrac{PV}{nT} = R[/tex]

In the Combined Gas Law,if we change either one of the variables the others will also change.

When the moles of the gas is constant , the above equation can be written as ,

[tex]\rm \dfrac{P'V'}{T'}= \dfrac{PV}{T}[/tex]

Given is P = 84kpa , T= 350⁰ C and T' = 350+230=580⁰ C , V=V' , P'=?

So we will substitute the values in the above formula keeping volume constant.

[tex]\rm \dfrac{P'}{T'}= \dfrac{P}{T}[/tex]

[tex]\rm\dfrac{P'}{580}= \dfrac{84}{350}[/tex]

[tex]\rm P' = \dfrac{84\times 580}{350}[/tex]

[tex]\rm P'= 139.2 \;kpa[/tex]

Therefore the new pressure will be 139.2 kpa .

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Which chemical equation represents a redox reaction?
TiCl4(s) + 2H2O(g) – TiO2(s) + 4HCl(g)
--
CaO(s) + SiO2(s) – CaSiO3)

Fe2O3(s) + 2Al(s) — Al2O3(s) + 2Fe()
+
CaCO3(s) — Cao(s) + CO2(g)

Answers

Answer:

CaCO3 yields CaO + CO2

Exclamation

Since the Decomposition state of a redox involves a broken down compound, this equation proves that this is a DECOMPOSITION since it is being broken down.

An element Argon has atomic number 18. Deduce the electronic configuration of the elements and suggest the group to which this element belong.​

Answers

Answer:

8th or 0th group known as Noble gases

A sample of gas is at 78.0 oC. You want to change the volume of the gas from 1.60 L to 0.425 L under constant pressure. What must you do to the temperature of the gas

Answers

Answer:

the rule is V1/T1= V2/T2

so we convert the T1 from °c to kelvin

78+273.15= 351.15 k

1.60/351.15 = 0.425/T2

4.55 ×10-³ = 0.425/T2

then T2 = 93.40 kelvin

hence, we should decrease the temperature

Infrared waves travel at a speed of 3.00 x 10^8 m/s. What is the frequency of an infrared wave
that has a vacuum wavelength of 5.5 micrometers?
(1 micrometer= 1x10^-6 m)
O 5.5 X 10^12 Hz
O 5.5 x 10^10 Hz
O 5.5 X 10^11 Hz
O 5.5 X 10^13 Hz

Answers

The frequency of the infrared wave at the given speed and wavelength is [tex]5.5 \times 10^{13} \ Hz[/tex].

The given parameters;

speed of the wave, v = 3 x 10⁸ m/swavelength of the wave, λ = 5.5 μm

The frequency of the infrared wave is calculated by using wave equation as shown below;

v = fλ

where;

f is the frequency of the wave

[tex]f = \frac{v}{\lambda} \\\\f = \frac{3\times 10^8}{5.5 \times 10^{-6}} \\\\f = 5.5 \times 10^{13} \ Hz[/tex]

Thus, the frequency of the infrared wave at the given speed and wavelength is [tex]5.5 \times 10^{13} \ Hz[/tex].

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Could someone take a picture of an acid or a base and label them

Answers

Answer:

Ok

Explanation:

how many grams of magnesium cyanide would you need to add to 275 ml of water to make a 0.075 molal solution

Answers

The mass of magnesium cyanide needed to prepare the solution is 1.57 g

We'll begin by calculating the number of mole of Mg(CN)₂. This can be obtained as follow:

Volume = 275 mL = 275 / 1000 = 0.275 L

Molarity of Mg(CN)₂ = 0.075 M

Mole of Mg(CN)₂ =?

Mole = Molarity x Volume

Mole of Mg(CN)₂ = 0.075 × 0.275

Mole of Mg(CN)₂ = 0.020625 mole

Finally, we shall determine the mass of Mg(CN)₂

Mole of Mg(CN)₂ = 0.020625 mole

Molar mass of Mg(CN)₂ = 24 + 2(12 + 14) = 76 g/mol

Mass of Mg(CN)₂ =?

Mass = mole × molar mass

Mass of Mg(CN)₂ = 0.020625 × 76

Mass of Mg(CN)₂ = 1.57 g

Therefore, 1.57 g of Mg(CN)₂ is needed to prepare the solution

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A strip of zinc metal was placed in a beaker that contained 120 mL of a solution of copper (II) nitrate, Cu(NO3)2(aq). The mass of the copper produced was 0.813 g. Find the initial concentration of the solution of copper (II) nitrate.

Answers

Answer:

molarity 0.1

Explanation:

mass of copper nitrate =2.4

no of moles exist in 120ml= 2.4/187.5=0.0128mole

molarity =.0.0128/.12=0.1m

14. Write a statement that makes a claim about arrangements of electrons and properties
within a family of elements.

Answers

i dont know

Explanation:

For the reaction whose balanced equation is as follows, find how many grams of
zinc phosphate will be produced by the reaction of 5.00 grams of ammonium
phosphate.
3 ZnCla + 2 (NH4)3PO4 → Zn3(PO4)2 + 6 NHACI

Answers

Answer:

oxygen

Explanation:

cause thats what we need

A sample of a gas in a 4L container at 300K has a pressure of 1 atm. If the
temperature is increased to 600K and the volume is decreased to 2L , the
pressure is likely to be closest to which of the following? *
O 0.5 atm
1 atm
4 atm
2 atm

Answers

The final pressure of the gas in the container is 4 atm

From the question given above, the following data were obtained:

Initial volume (V₁) = 4 L

Initial temperature (T₁) = 300 K

Initial pressure (P₁) = 1 atm

Final temperature (T₂) = 600 K

Final volume (V₂) = 2 L

Final pressure (P₂) =?

Using the combine gas equation, we can obtain the final pressure of the gas as illustrated below:

[tex]\frac{P_{1} V_{1} }{T_{1}} = \frac{P_{2} V_{2}}{T_{2}}\\\\\frac{1 * 4}{300} = \frac{P_{2} * 2}{600} \\\\[/tex]

Cross multiply

300 × 2 × P₂ = 4 × 600

600 × P₂ = 2400

Divide both side by 600

[tex]P_{2} = \frac{2400}{600} \\\\[/tex]

P₂ = 4 atm

Therefore, the final pressure of gas is 4 atm.

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What equation explains the relation between amperes, watts and volts?

Answers

The answer is watts bot volts
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