What is the symbol for the following ion electronic structure: 1s^ 2 2s^ 2 2p^ 6 3s^ 2 3p^ 6 3d^ 10 4s^ 2 4p^ 6 4d^ 10 5s^ 2 with an atomic number of 50?

Answer:

[tex]T=-75.59\°C[/tex]

Explanation:

Hello!

In this case, since we can treat neon as an ideal gas, it is possible for us to use the following equation:

[tex]PV=nRT[/tex]

Whereas the temperature is out unknown, so we proceed as follows:

[tex]T=\frac{PV}{nR}[/tex]

However, we need the moles of neon in 0.02 kg as shown below:

[tex]n=0.02kg*\frac{1000g}{1kg}*\frac{1mol}{20.17g} =0.992mol[/tex]

Thus, we obtain the following temperature in Kelvins:

[tex]T=\frac{6.43atm*2.5L}{0.992mol*0.08206\frac{atm*L}{mol*K}} \\\\T=197.56K[/tex]

Therefore, in degree Celsius it is:

[tex]T=197.56-273.15\\\\T=-75.59\°C[/tex]

Best regards!

Answer (TL;DR):

False, ionic compounds form between a metal and a nonmetal. This is because metals are looking to lose electrons to get a full outer shell while nonmetals are looking to gain electrons to get a full outer shell.

Explanation:

Atoms have a full outer shell when their outermost shell holds the maximum number of electrons. For example, if the outermost shell is the first shell of the atom, it can hold up to 2 atoms. When this shell holds 2 atoms, it is considered full. If the outermost shell is the second shell of the atom, it can hold up to 8 atoms. When this shell holds 8 atoms, it is considered full. This can also be referred to as an atom "gaining a complete octet." The reason that atoms want a complete octet is to become stable and less reactive.

Let's say an atom with 3 shells has only 1 electron on the third shell. It doesn't have a complete octet and it wants to gain one. The third shell can hold up to 8 electrons. So, to gain a complete octet, the atom can either gain 7 electrons or just lose the 1 that it already has, which is the easier option. This is the case with metals and the opposite goes for nonmetals.

Because metals want to lose electrons and nonmetals want to gain electrons, they form compounds with each other.

I hope this helps!

Answer:  characteristic molar mass of an element is simply the atomic mass in g/mol. However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol).

Explanation:

o calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms. so the answer to your question is B

The law of conservation of mass states that, for any isolated system, the mass can neither be created nor be destroyed  

learn more about conservation of mass and energy:

https://brainly.com/question/13971039

Answer:

False, hope this helps!

Explanation:

Answer: The number of moles of [tex]O_2[/tex] are 6.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]

Given mass = 192 g

Molar mass = 32 g/mol

[tex]\text{Number of moles}=\frac{192g}{32g/mol}=6mol[/tex]

The number of moles of [tex]O_2[/tex] are 6.

Answer:

Türkçesini yazarmısın

Answer:

51.9961 grams

Explanation:

You can view more details on each measurement unit: molecular weight of Chromium or grams The molecular formula for Chromium is Cr. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Chromium, or 51.9961 grams.

Answer:

what happened to it, have the gone extinct

Answer:

The missing information or their role in the discovery of the cell is as follows:

Robert Hooke: He was the first scientist to called cells to tiny box-like cavities he saw in cork and illustrated as cells.

A. Leeuwenhoek: he was a microscopist and microbiologist who used microscopes and observed many other living cells. He called animalcules to these single-cell living organisms later used to prove that cells are the fundamental unit of life.

Schwann and Schleiden:  They presented the theory that suggested that the cells are basic building blocks of all living things.

Virchow: He observed that the cell dividing and come from pre-existing cells.

This question is incomplete, the complete question is;

The times of first sprinkler activation (in seconds) for a series of tests of fire-prevention sprinkler systems that use aqueous film-forming foam is as follows; 27 41 22 27 23 35 30 33 24 27 28 22 24

( see " use of AFFF in sprinkler systems," Fire technology, 1975: 5)

The system has been designed so that the true average activation time is supposed to be at most 25 seconds.

Does the data indicate the design specifications have not been met?

Test the relevant hypothesis at significance level 0.05 using the P-value approach  

Answer:

since p-value (0.042299) is lesser than the level of significance ( 0.05)

We Reject Null Hypothesis

Hence, There is no sufficient evidence that the true average activation time is at most 25 seconds

Explanation:

Given the data in the question;

lets consider Null and Alternative hypothesis;

Null hypothesis H₀ : There is sufficient evidence that the true average activation time is at most 25 seconds

Alternative hypothesis H₁ : There is no sufficient evidence that the true average activation time is at most 25 seconds

i.e

Null hypothesis H₀ : μ ≤ 25

Alternative hypothesis H₁ :  μ > 25

level of significance σ = 0.05

first we determine the sample mean;

[tex]x^{bar}[/tex] = [tex]\frac{1}{n}[/tex]∑[tex]x_{i}[/tex]

where n is sample size and ∑[tex]x_{i}[/tex] is summation of all the sample;

=  [tex]\frac{1}{13}[/tex]( 27 + 41 + 22 + 27 + 23 + 35 + 30 + 33 + 24 + 27 + 28 + 22 + 24 )

=   [tex]\frac{1}{13}[/tex]( 363

sample mean [tex]x^{bar}[/tex] = 27.9231

next we find the standard deviation

s = √( [tex]\frac{1}{n-1}[/tex]∑([tex]x_{i}-x^{bar}[/tex])²

x                    ([tex]x_{i}-x^{bar}[/tex])                       ([tex]x_{i}-x^{bar}[/tex])²

27                   -0.9231                          0.8521

41                    13.0769                        171.0053

22                  -5.9231                          35.0831  

27                  -0.9231                          0.8521

23                  -4.9231                          24.2369

35                  7.0769                          50.0825

30                  2.0769                          4.3135

33                  5.0769                          25.7749

24                  -3.9231                          15.3907

27                  -0.9231                          0.8521

28                  0.0769                          0.0059

22                 -5.9231                          35.0831  

24                 -3.9231                          15.3907

sum                                                    378.9229

so ∑([tex]x_{i}-x^{bar}[/tex])² = 378.9229

∴

s = √( [tex]\frac{1}{13-1}[/tex] ×378.9229 )

s = √31.5769

standard deviation s = 5.6193

now, the Test statistics

t = ( [tex]x^{bar}[/tex] - μ ) / [tex]\frac{s}{\sqrt{n} }[/tex]

we substitute

t = ( 27.9231 - 25 ) / [tex]\frac{5.6193}{\sqrt{13} }[/tex]

t = 2.9231 / 1.5585

t = 1.88

now degree of freedom df = n - 1 = 13 - 1 = 12

next we calculate p-value

p-value = 0.042299 ( using Execl's ( = TDIST(1.88,12,1)))

Here x=1.88, df=12, one tail

now we compare the p-value with the level of significance

since p-value (0.042299) is lesser than the level of significance ( 0.05)

We Reject Null Hypothesis

Hence, There is no sufficient evidence that the true average activation time is at most 25 seconds

Answer:

C₂H₄O

Explanation:

In a compound that contains Cabon, hydrogen and oxygen, the combustion produce CO₂ from the carbon, and H₂O from the hydrogens. Using the mass of the products we can solve the moles of Carbon and hydrogen. The empirical formula is the simplest whole-number of atoms present in a molecule.

Moles CO₂ = Moles C:

11.8g CO₂ * (1mol / 44g) = 0.268 moles CO₂ = 0.268 moles C * (12g/mol) =

3.216g C

Moles H₂O = 1/2 moles H:

4.83g H₂O * (1mol / 18g) = 0.268 moles H₂O * (2 mol H / 1 mol H₂O) =

0.537 mol H * (1g/mol) = 0.537g H

Mass O to find moles O:

5.90g Sample - 3.216g C - 0.537g H = 2.147g O * (1mol / 16g) = 0.134 moles O

Ratio of atoms -Dividing in 0.134 moles-:

C = 0.268mol C / 0.134 mol O = 2

H = 0.537mol H / 0.134 mol O = 4

O = 0.134mol O / 0.134 mol O = 1

Empirical formula is:

Answer:

1)Solid

2)A gas

Explanation:

solids is in a fixed position with direct contact

Gas are seperate and free with its movement.

The particles in both liquids and solid particles in are in direct contact with each other, while the are particles in a gas are separated from each other by relatively large distances.

A particle can be defined as total mass occupy in space, all the physical structures are composed of particles, can be present in three basic states such as solid, liquid, and gaseous state.

The atoms are basic unit of matter and that make up the objects which can be visible and touched every day, the amount of matter in an object can be determined by its mass.

A physical property of the particle is not depend of its chemical composition such as Density, color, hardness, melting and boiling points, and electrical conductivity.

Some characteristics of particle like density, color, mass, volume, length, malleability, melting point, hardness, odor, temperature.

Learn more about properties of particle , here:

brainly.com/question/28200017

#SPJ2

Answer:

A

Explanation:

A formal charge (FC) is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity(Wikipedia).

The formal charge on an atom in a molecule reflects the electron count associated with the atom compared to the isolated neutral atom(University of Calgary).

Looking at all the structures listed A-E for SeO2F2, only structure A minimizes the formal charges for each atom in SeO2F2.

Answer:

Metal paper clips hope it helps

it's the last one because it's depended on the rock layers

Answer:

The law of superposition is used to determine a rocks relative age.

Answer:

40.95 L

Explanation:

We'll begin by calculating the number of mole in 12.3 g of O₂. This can be obtained as follow:

Mass of O₂ = 12.3 g

Molar mass of O₂ = 16 × 2 = 32 g/mol

Mole of O₂ =?

Mole = mass / Molar mass

Mole of O₂ = 12.3 / 32

Mole of O₂ = 0.384 mole

Next, we shall determine the volume occupied by 0.384 mole of O₂. This can be obtained as follow:

Number of mole (n) of O₂ = 0.384 mole

Pressure (P) = 1 atm

Temperature (T) = 273 K

Gas constant (R) = 0.0821 atm.L/Kmol

Volume (V) of O₂ =?

PV = nRT

1 × V = 0.384 × 0.0821 × 273

V = 0.384 × 0.0821 × 273

V = 8.6 L

Thus, the volume of O₂ is 8.6 L

Finally, we shall determine the volume of air that contains 8.6 L of O₂. This can be obtained as follow:

Volume of O₂ = 8.6 L

Percentage of O₂ in air = 21%

Volume of air =?

Percentage of O₂ = Vol of O₂ / Vol of air × 100

21% = 8.6 / Vol of air

21 / 100 = 8.6 / Vol of air

Cross multiply

21 × Vol of air = 100 × 8.6

21 × Vol of air = 860

Divide both side by 21

Volume of air = 860 / 21

Volume of air = 40.95 L

Therefore, the volume of air is 40.95 L.

Answer:The rock forms large crystals

Explanation:

Answer:

A canyon has formed.

Explanation:

Answer:

B should be the answer, and ur low-key valid lol

Explanation:

Answer:

B.

Explanation:

Not sure if this is correct if not sorry.

Explanation:

a. 6310 m

Two significant numbers means it must have only 2  digits. The first two digits are 6 and 3. The next number 1 is not up to 5 hence it would be round off to zero.

Two s.f = 6300

Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.

6.3 x 10^3

b. 125.00 Kg

Two significant numbers means it must have only 2  digits. The first two digits are 1 and 2. The next number 5 is up to 5 hence it would be round up to one.

Two s.f = 130.00

Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.

Scientific notation = 1.3 x 10^2

c. 6906 km

Two significant numbers means it must have only 2  digits. The first two digits are 6 and 9. The next number 0 is not up to 5 hence it would be round up to zero.

Two s.f = 6900

Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.

Scientific notation = 6.9 x 10^3

d. 0.0828 m

Two significant numbers means it must have only 2  digits. The first two digits(excluding zero) are 8 and 2 . The next number 8 is up to 5 hence it would be round up to one.

Two s.f = 0.083

Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.

Scientific notation = 8.3 x 10^-2

Answer:

8.55 × 10³ cal

Explanation:

Step 1: Given and required data

Step 2: Calculate the temperature change (ΔT)

ΔT = Final temperature - Initial temperature = 38.8 °C - 22.7 °C = 16.1 °C

Step 3: Calculate the heat required (Q)

We will use the following expression.

Q = c × m × ΔT

Q = 1 cal/g.°C × 531 g × 16.1 °C = 8.55 × 10³ cal

Answer:

New temperature T2 = 707.5 K (Approx.)

Explanation:

Given:

Old pressure P1 = 2 atm

Old temperature T1 = 283 K

New Pressure P2 = 5 atm

Find:

New temperature T2

Computation:

Using Gay-Lussac law;

P1 / T1 = P2 / T2

So,

2 / 283 = 5 / T2

New temperature T2 = 707.5 K (Approx.)

Answer:

A)  $0.208 per unit

B) $0.220 per unit

C) An inspector should be hired

Explanation:

percentage of defect rate = 2% = 0.02

cost of inspector = $10 per hour

production rate = 48 per hour

cost of not hiring an inspector = $11

A) Determine the inspection cost per unit if an inspector is hired

= cost of inspector / production rate

= 10 / 48 = $0.208 per unit

B) Determine the defective cost per unit if an Inspector is not hired

= cost of not hiring an inspector * percentage of defect rate

= 11 * 0.02

= $0.220 per unit

C)   Inspection cost < defective cost   i.e. $0.208 < $0.220  hence an inspector should be hired

Answer:

C. 1, 4–dimethyl–1–cyclohexene

D. 4, 6–dichloro–1–heptene

Explanation:

C. Determination of the name of the compound.

To name the compound given above we must observe the following:

1. Determine the functional group of the compound. In this case, the functional group is the double bond (–C=C–).

2. Determine the parent name by counting the number of carbon that makes up the ring. In this case, 6 carbon makes up the ring. Hence the parent name is cyclohexene.

3. Identify the substituent group attached to the compound. In this case, two methyl group i.e –CH₃ are attached.

4. Locate the position of the substituent group attached by giving the functional group the lowest possible count. In this case, the functional group is at carbon 1, the first methyl group is at carbon 1 and the 2nd methyl group is at carbon 4.

5. Combine the above to obtain the name. Thus, the name of the compound is:

1, 4–dimethyl–1–cyclohexene.

D. Determination of the name of the compound.

To name the compound given above we must observe the following:

1. Determine the functional group of the compound. In this case, the functional group is the double bond (–C=C–).

2. Determine the parent name by counting the number of carbon that makes up the chain. In this case, 7 carbons makes up the chain. Hence, the parent name of the compound is heptene.

3. Identify the substituent group attached to the compound. In this case, two chlorine (Chloro) i.e –Cl are attached.

4. Locate the position of the substituent group attached by giving the functional group the lowest possible count. In this case, the functional group is at carbon 1, the first chlorine is at carbon 4 and the 2nd is at carbon 6.

5. Combine the above to obtain the name. Thus, the name of the compound is:

4, 6–dichloro–1–heptene

Answer:

A cat jk but for real (It's called Freezing and I feel like explaining it)

Explanation:

Freezing is a process where a liquid changes to a solid by cooling.

If water (liquid state) is cooled, it changes to ice (solid-state). This change is called FREEZING. The temperature at which this occurs is called the freezing point (fp) of the substance.

Answer:

Freezing phase transition

Explanation:

Freezing is a phase transition in which a liquid turns into a solid when its temperature is lowered to its freezing point.Freezing, or solidification, is a phase transition in which a liquid turns into a solid when its temperature is lowered to or below its freezing point. All known liquids, except helium, freeze when the temperature is low enough.

(hope this helps can i plz have brainlist :D hehe)