Match each set of quantum numbers to the correct subshell description by typing in the correct number.

1: n = 2, l = 0 2p:

2: n = 3, l = 2 3d:

3: n = 1, l = 0 2s:

4: n = 2, l = 1 4f:

5: n = 4, l = 3 1s:

Answer:

Subtract the charge from the atomic number. When an ion has a positive charge, the atom has lost electrons. To calculate the remaining number of electrons, you subtract the amount of extra charge from the atomic number. In the case of a positive ion, there are more protons than electrons.

Explanation:

Answer:

Explanation:

electrons is same as the amount of protons. and protons are also same as the atomic #.  

Answer:

Stereoisomers that are not mirror images of each are diasteroisomer . The chemical and physical properties of two diasteroisomers are different. Isomers that differ only in the way atoms are oriented in space are Stereoisomers . Achiral compounds that contain tetrahedral stereogenic centers are meso isomers . Isomers that differ in the way the atoms are connected to each other are structural isomer . Stereoisomers that are nonsuperimposable mirror images of each other are enantiomers . The chemical and physical properties of two enantiomers are identical except in their interaction with chiral substances.

Explanation:

Diasteroisomers are differentiated by the spatial arrangement of atoms, but they are not specular images so they are not enantiomers. In order for two molecules to be diastereoisomers, they must have at least two chiral centers. In one of the centers the substituents are arranged equally in both molecules and in the other they must change.

Enantiomers are specular images but are not superimposable. They have the ability to rotate the polarized light plane

The stereoisomers present the same molecular formula but different spatial rearrangement between their atoms, we can mention the cis and trans isomers where the cis isomers are on the same side of the plane and the trans isomers on opposite sides. They are also known as geometric isomers.

Meso compounds always have more than one asymmetric center and are aquiral. They are distinguished because they present a plane of symmetry.

Structural isomers are those that have different connectivity between their atoms. We can differentiate, for example, metoximethane from ethanol. They will always have the same molecular formula.

Answer:

The more you get closer to a substance in the periodic table things that are included into the substance start to get bigger

Explanation:

Answer:

halogen

Explanation:

It belongs to Group 17 on the periodic table, which is a halogen

Astatine is a periodic element that is represented as At and has the atomic number of 85. This element belongs to the halogen group of the periodic table. Thus, option b is correct.

Halogens are the group or the families of the periodic table that are characterized by the six elements that are non-metallic in nature. The other halogens are iodine, chlorine, bromine, fluorine, and tennessine.

The astatine element of the halogen group (group 17) is the rarest naturally occurring and have an electronic configuration of [Xe] 4f¹⁴5d¹⁰6s²6p⁵, with atomic number 85.

The isotopes of astatine are not stable and are used to treat a disease like a thyroid in radiotherapy. Also, it is used to treat cancerous cells.

Therefore, option b. the astatine element is a halogen.

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Answer:

Explanation:

The answer is the rectum because the small intestine takes the nutrients and delivers toxins to the kidneys, and the pancreas is an organ that helps digest hormones that help regulate the way your body processes sugar.

Answer:

B

Explanation:

Rectum.

It's definitly right. I had this on a quiz.

Answer:

2 ml=2 cm³

Explanation:

volume=mass/density

1ml= 1cm³

= 24g/12g/cm³

= 2 cm³

Answer:

2 ml=2 cm³

Explanation:

volume=mass/density

1ml= 1cm³

= 24g/12g/cm³ = 2 cm³

please mark me brainiest you said you would!

Answer:

The answer is D; 1.45 x 10^-4

Answer:

optical engineer

Explanation:

Answer:optical engineer

Explanation: HOPE IT HELPS YOU .PLEASE GIVE BRAINLIEST THANKS . .

Answer:

reactants

Explanation:

Although there are the same atoms present in both the reactants and the products, the atoms in the reactants were rearranged to create a new substance, sodium chloride. Sodium chloride was not present in the reactants.

Answer:

i think its vinegar

Explanation:

Answer:

Vinegar

Explanation:

It is made with several ingredients, including sugar.

Answer:

Initial temperature of ice for this experiment = 0⁰c

heat of fusion = 95 cal

Explanation:

mass of empty cup = 3.2 g

mass of cup filled with hot water = 28.1 g

hence : mass of hot water = 28.1 - 3.2 = 24.9 g

mass of hot water + ice + empty cup = 33.0 g

hence : mass of ice = 33.0 - 24.9 - 3.2 = 4.9 g

temperature of hot water = 60.7⁰c

when ice was added ( temperature of mixture ) = 35.1⁰c

A) Initial temperature of the ice

initial temperature of ice is  0⁰c

B) experimental value for heat of fusion

we have the apply the law of energy conservation

= heat lost(hot water ) = heat gain by ice      s = specific heat of water = 1 cal

= M*s*ΔT = Mice * Hf + Mice *s *T

= 24.9 * 1 * ( 60.7 - 35.1 ) = 4.9 * Hf + 4.9 * 1 * 35.1

= 24.9 ( 25.6 ) = 4.9 hf + 171.99

Hf ( heat of fusion ) = 465.45 / 4.9 = 94.99 ≈ 95 cal

The Initial temperature of ice for this experiment is 0⁰c

The experimental heat of fusion of ice is 95.1 cal/g

Wet ice means ice with water on top of it or ice that is melting.

Since the ice was wet or melting, it means that its temperature was 0⁰c

Initial temperature of ice for this experiment = 0⁰c

Using the law of conservation of heat

initial temperature of ice is  0⁰c

mass of empty cup, m1 = 3.2 g

mass of cup filled with hot water, m2 = 28.1 g

mass of hot water, m3 = m2 - m1

mass of hot water = 28.1 - 3.2

mass of hot water = 24.9 g

mass of hot water + ice + empty cup, m4 = 33.0 g

mass of ice, m5 = m4 - m2

mass of ice = 33.0 - 28.1 = 4.9 g

temperature of hot water = 60.7⁰c

final temperature of ice + hot water mixture = 35.1⁰c

Initial temperature of the ice = y

Heat lost by hot water, H = mcΔT

where m = mass of hot water

c = specific heat of water = 1 cal

ΔT = temperature change

H = 24.9 × 1 × {35.1 - 60.7}

H = 637.44

Therefore, Heat gained by ice = 637.44

Heat gained in changing from ice at 0°C to water at 0°C = m×Hf

Heat gained in changing from water at 0°C to water at 35.1°C = mcΔT

where m = mass of water at 0°C

c = specific heat of water = 1 cal

ΔT = temperature change

Heat gained by ice = 4.9 × Hf + 4.9 × 1 × {35 - 0}

Heat gained by ice = 4.9 × Hf + 171.5

637.44 - 171.5 = 4.9 × Hf

Hf = 465.94/4.9

Hf = 95.1 cal/g

Therefore, Heat of fusion of ice = 95.1 cal/g

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Answer:

Its I, II, III, IV

Explanation:

I took the test

I, II, III, and IV factors that affect island colonization and species richness for a region. Hence, option D is correct.

Colonialism is defined as “control by one power over a dependent area or people.”

Immigration to an island is affected by the distance of the island from a source of colonists. Usually, this source is the mainland (and it will be for this lesson), but it can also be other islands. Islands that are more isolated are less likely to receive immigrants than islands that are less isolated.

Hence, the species-area effect, rescue effect, target effect and time/stability hypothesis affect island colonization and species richness for a region.

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Answer:

This question is incomplete

Explanation:

This question is incomplete but generally, anions are ions that are made up of an atom or group of atoms (polyatomic) that are negatively charged. The first thing one should look out for when trying to identify an anion is the negative charge. Examples of anions include Cl⁻, O²⁻, N³⁻, NO₃⁻, SO₄²⁻, PO₄³⁻and AsO₄³⁻.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 11 g/cm³

volume = final volume of water - initial volume of water

volume = 4 - 2 = 2 mL

But 1 mL = 1 cm³

2 mL = 2 cm³

volume = 2 cm³

The mass of the marble is

mass = 11 × 2

We have the final answer as

Hope this helps you

Here is the missing part of the question.

4. A distance runner is in a 4-hour race and sweats at a rate of 455 mL/hour. The sodium ion concentration in sweat is, on average, 920. mg/L. How many moles of sodium ions were lost during the race? Report your answer to three significant figures.

Answer:

Explanation:

Given that:

the time for the runner = 4 hours

the rate of sweating = 455 mL/hour

Therefore, the total sweating rate = 455 mL/hour × 4 hours

the total sweating rate = 1820 mL

The [tex]Na^+[/tex] conc. in sweat = 920 mg/L

Thus, the total number in grams of [tex]Na^+[/tex] sweat lost = [tex]\dfrac{920}{1000}\times 1820[/tex]

= 1674.4 mg

= 1.6744 grams

number of moles of  [tex]Na^+[/tex] sweat lost = mass of  [tex]Na^+[/tex] sweat lost/ molar mass of [tex]Na^+[/tex]

number of moles of  [tex]Na^+[/tex] sweat lost = 1.6744/ 23

number of moles of  [tex]Na^+[/tex] sweat lost = 0.0728  mole

5. concentration of the runner = 142 mmol/L

the average volume of blood = 5.00 L

the number of moles sodium  [tex]Na^+[/tex]  = concentration × volume

the number of moles sodium  [tex]Na^+[/tex]  = 142 mmol/L × 5.000 L

the number of moles sodium  [tex]Na^+[/tex]  = 710 mmol

the number of moles sodium  [tex]Na^+[/tex]  = 0.710 mol

recall that; the number of moles of  [tex]Na^+[/tex] sweat lost = 0.0728 mol

thus, the number of remaining [tex]Na^+[/tex]  = (0.71 - 0.0728) mol

the number of remaining [tex]Na^+[/tex]  = 0.6372 mol

The runner ending  [tex]Na^+[/tex] concentration =  0.6372 mol/ 5.00 L

The runner ending  [tex]Na^+[/tex] concentration =  127440 mmol/L

Answer:

Explanation:

Given that;

The initial pressure = 0.705 atm

The initial temperature = 22.0° C

The final pressure = 1.00 atm

The objective is to calculate the final temperature,

Since the change occurs adiabatically and reversibly, the final temperature can be calculated by using the thermodynamics equation:

[tex](\dfrac{T_2}{T_1})^r= (\dfrac{P_2}{P_1})^{r-1}[/tex]

where;

r = 7/5 = 1.4

[tex](\dfrac{T_2}{22.0^0})^{1.4}= (\dfrac{1.00}{0.705})^{1.4-1}[/tex]

[tex](\dfrac{T_2}{22.0^0})^{1.4}= (1.418)^{0.4}[/tex]

[tex]T_2 = 22 \times 1.418 ^{^{\frac{0.4}{1.4}}[/tex]

[tex]T_2 = 22 \times 1.418 ^{{0.286}[/tex]

[tex]T_2 =24.31^0 \ C[/tex]

Answer:

  C. The boiling point of water

Explanation:

We assume your question is the one attached.

Obviously, the shape of the (liquid) water is a function of the container it is in, as it is for any liquid or gas.

The rate of evaporation will depend on the temperature and on the surface area. The different containers are different in both ways, so evaporation is not a constant.

The boiling point is a physical property of the water, so will be the same across all containers.

The amount of steam released is related to the rate of evaporation. It will not be a constant across the different containers.

__

The appropriate choice is ...

  The boiling point of water

Answer:

0.0447 M.

Explanation:

We'll begin by calculating the molarity of the diluted solution of the first calibration standard solution. This can be obtained as follow:

Molarity of stock solution (M1) = 0.185 M

Volume of stock solution (V1) = 30.8 mL

Volume of diluted solution (V2) = 100 mL

Molarity of diluted solution (M2) =?

M1V1 = M2V2

0.185 × 30.8 = M2 × 100

5.698 = M2 × 100

Divide both side by 100

M2 = 5.698 / 100

M2 = 0.05698 M

Therefore, the molarity of the diluted solution of the first calibration standard solution is 0.05698 M

Finally, we shall determine the molarity of the second calibration standard solution as follow:

Molarity of first calibration standard solution (M1) = 0.05698 M

Volume of first calibration standard solution (V1) = 78.5 mL

Volume of second calibration standard solution (V1) = 100 mL

Molarity of second calibration standard solution (M2) =?

M1V1 = M2V2

0.05698 × 78.5 = M2 × 100

4.47293 = M2 × 100

Divide both side by 100

M2 = 4.47293 / 100

M2 = 0.0447 M

Therefore, the molarity of the second calibration standard solution is 0.0447 M.

Answer:

Explanation:

From the given information, the rise in a capillary tube h = [tex]\dfrac{2T cos \theta }{r \rho g}[/tex]

where:

For the height of water:

Surface Tension T = 66.2 mN/m = 66.2 N/m

θ = 10⁰

Cos θ = cos 10 = 0.985

radius r = 0,257 mm = 0.275 × 10⁻³   m

density of water [tex]\rho[/tex] = 1000 kg/m³

g = 9.8 m/s²

∴

replacing our values:

h = [tex]\dfrac{2T cos \theta }{r \rho g}[/tex]

h = [tex]\dfrac{2\times 66.2 \times 10^{-3} \times 0.985}{0.275 \times 10^{-3} \times 1000\times 9.8}[/tex]

h = 0.0484 meteres

h = 48.3 mm

Since the height h = [tex]\dfrac{2T cos \theta }{r \rho g}[/tex]

r = 0.275 mm = 0.275 × 10⁻³   m

the density of mecury now [tex]\rho_H{g}}[/tex]

= 13593 kg/m³

the surface tension of the mercury [tex]T_{Hg} =470 \times 10^{-3} \ N/m[/tex]

θ = 130⁰

Cos θ = cos 130 = -0.6428

Using the same above equation:

h = [tex]\dfrac{2\times 470 \times 10^{-3} \times (-0.6428) }{0.275 \times 10^{-3} \times 13593 \times 9.8}[/tex]

h = -0.016494 m

h = 16.49 mm

Answer:

i think its B

Explanation:

Answer:

Its is D

Explanation:

I took the test

Answer:

3.15 * 136 (136 is the molar mass of calcium sulfate). = 428 g CaSO4.

Explanation:

Answer:

Behavior

Explanation:

Near human habitaciones these toads may congregate underneath outsider lights to feed one the insects the attract.

Answer:

Exothermic I think

Explanation:

Answer:

When writing equation the mass on left side of equation must be equal to the mass on right side. True

Explanation:

The chemical reactions always follow the law of conservation of mass.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass because total mass is equal on both side of equation.

Answer:

please find the attached file.

Explanation: