why do you need to continue to wash the organic layer with sodium carbonate until it remains basic?

1. The mass of nitrogen is 0.16 g

2. The volume of excess reactant is 5.4 L

We know that;

For chlorine

1 mole of the gas occupies 22.4 L

x moles of the gas occupies 13 L

x = 0.58 mol

For ammonia;

1 mole of the gas occupies 22.4 L

x moles of the gas occupies 10 L

x = 0.45 mol

8 moles of ammonia reacts with 6 moles of chlorine

0.45 moles of ammonia would react with 0.45 * 6/8

= 0.34 moles

Ammonia is the limiting reactant

If 8 moles of ammonia produces 1 mole of hydrogen

0.45 moles of ammonia would produce 0.45 * 1/8

= 0.056 moles

Mass of nitrogen = 0.056 moles * 28 g/mol

= 0.16 g

Amount of excess reactant = 0.58 mol - 0.34 mol

= 0.24 mol

If 1 mole occupies 22.4 L

0.24 moles occupies 0.24 * 22.4

= 5.4 L

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When a nonmetal oxide is added to water, it will form an acidic solution. This is because nonmetal oxides, such as carbon dioxide, sulfur dioxide, and nitrogen dioxide, react with water to produce an acidic solution.

The reaction between the nonmetal oxide and water results in the formation of an acid.

The general reaction for the reaction of a nonmetal oxide with water is:

Nonmetal oxide + water → acid

For example, when sulfur dioxide (SO₂) is added to water, it reacts to form sulfurous acid (H₂SO₃):

SO₂ + H₂O → H₂SO₃

Similarly, when nitrogen dioxide (NO₂) is added to water, it reacts to form nitric acid (HNO₃):

NO₂ + H₂O → HNO₃

The acidity of the solution depends on the strength of the acid formed. The strength of the acid formed depends on the electronegativity of the nonmetal oxide. Nonmetal oxides with higher electronegativity tend to form stronger acids.

In summary, when a nonmetal oxide is added to water, it reacts to form an acidic solution. The strength of the acid formed depends on the electronegativity of the nonmetal oxide.

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The following are the function of the integumentary system.

1. It protects the body's internal tissues and organs.

2. it regulates body temperature.

3. it protects the body against invasion by infectious organisms.

5. it protects the body from dehydration.

6. it helps the body dispose of waste materials.

8. it acts as a receptor for touch, pressure, pain, heat, and cold.

The integumentary system includes the epidermis, dermis, hypodermis, associated glands, hair, and nails. In addition to its barrier function, this system performs many intricate functions such as body temperature regulation, cell fluid maintenance, synthesis of Vitamin D, and detection of stimuli.

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Answer: The pOH value is 2.

Explanation:

Given: \([H^{+}] = 9.9 \times 10^{-13} M\)

pH is defined as the negative logarithm of hydrogen ion concentration.

Hence, pH of the given solution is calculated as follows.

\(pH = -log [H^{+}]\\= - log (9.9 \times 10^{-13})\\= 12\)

The relation between pH and pOH is as follows.

pH + pOH = 14

Therefore, pOH is calculated as follows.

pH + pOH = 14

12 + pOH = 14

pOH = 14 - 12

= 2

Thus, we can conclude that the pOH value is 2.

Answer:

It's the 4th one. The car is accelerating gradually.

Looking at how others are reacting when we are uncertain about how we should react is a process called social referencing.

Infants use an adult's affective displays to control how they behave around environmental objects, people, and circumstances. This process is known as social reference. One of the key mechanisms through which infants learn to comprehend their environment is social reference.

By the age of twelve months, newborns can use the faces of their caregivers as a source of visual information to assist them grasp unfamiliar or unclear situations. For instance, when given a new toy car, a baby may decide whether or not to play with it by observing his mother's facial expressions.

It appears that social referencing processes are active during a variety of intragroup and interpersonal interactions.

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Looking at how others are reacting when we are uncertain about how we should react is a process called a. social referencing.

In the field of sociology, social referencing can be described as a process by which people tend to look at each other when they do not know how to act in a particular social situation.

Social referencing refers to acting according to how others have behaved in a particular scenario as you do not know how to face a particular social situation.

Social referencing is the ability of a person to learn from others when he himself does not know how to act in a situation and is uncertain.

Although a part of your question is missing, you might be referring to this question:

Looking at how others are reacting when we are uncertain about how we should react is a process called

a. social referencing.

b. sympathy.

c. empathic feelings.

d. emotional intelligence.

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Ionic bonds are formed between metals and nonmetals, while covalent bonds are formed between two nonmetals.

An ionic bond is formed after two or more atoms donate or gain electrons to form an ion. An ionic bond occurs between a metal that donates electrons and a nonmetal that accepts electrons. Ions with opposite charges attract each other and form an ionic bond. The functions of the following bonds in the human body are shown below. Ionic bonding - the generation of electrical signals and their transmission.

Covalent Bond Holds together the building blocks of important molecules such as DNA. Hydrogen Bonds Hold strands of genetic material together. Only pure covalent bonds occur between identical atoms. Electrons are usually shared, but with a polarity, he spends more time on one atom than on another. Ionic bonds are formed between metals and nonmetals. A covalent bond is formed between two non-metals.

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The concentration of the original HCI was 1.8 M.

To determine the concentration of the original HCl, we can use the dilution formula:

C1V1 = C2V2

where C1 is the concentration of the original HCI, V1 is the volume of the original HCI taken, C2 is the concentration of the diluted HCI, and V2 is the final volume of the diluted solution.

Plugging in the values given in the problem, we get:

C1(12.5 ml) = (0.15 M)(150.0 ml)

Solving for C1, we get:

C1 = (0.15 M)(150.0 ml)/(12.5 ml)

C1 = 1.8 M

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Answer:

h20

Explanation:

Answer:

Mass = 0.287 g

Explanation:

Given data:

Number of moles of MgCl₂ = 0.001 mol

Mass of precipitate formed (AgCl) = ?

Solution:

Chemical equation:

MgCl₂(aq) + 2AgNO₃(aq)    →       Mg(NO₃)₂(aq) + 2AgCl (s)

now we will compare the moles of MgCl₂ and AgCl.

            MgCl₂           :            AgCl

                1                :             2

           0.001             :       2/1×0.001 = 0.002

Mass of AgCl:

Mass = number of moles × molar mass

Mass = 0.002 mol × 143.4 g/mol

Mass = 0.287 g

Answer:

plant

Explanation:

let me know if correct

Answer:

it's volume also decrease

Answer:

It is used to make black gunpowder and also to make sulfuric acid which is used in batteries, fertilizers, etc...

Explanation:

It is used to make black gunpowder and also to make sulfuric acid which is used in batteries, fertilizers, etc..

Answer:

please translate to English so I can help

Explanation:

the reason is bc I cant read this so jus comment in English and I'll reply the answer

Because of the addition of one electron, the effective nuclear charge falls and repulsion rises, causing electrons to be further apart and therefore increasing atomic size. We also know that anion has a bigger size than the parent atom, therefore Br- will have the highest atomic size.

The radius of the bromide ion Br- is greater.

Anions are more massive than their parent atoms. The anion's extra electron increases electron-electron repulsion. Since electrons spread out further in space, an anion has a wider radius than its parent atom.

Bromine belongs to the halogen group, which also contains fluorine, chlorine, iodine, and astatine.

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Answer:

C

Explanation: Your welcome

a. HI(g) ⇒ H₂9g) + I₂(g)

b. Al(s) + I₂(s)⇒AlI₃(s)

c. FeO(s)+O₂(g)⇒Fe₂O₃(s)

Given

word equations

Required

skeleton equations

Solution

The skeleton equation shows the chemical formula of the reaction between reactants and products, regardless of the actual amount of the reacting compound (unbalanced reaction)

The skeleton equations :

a. HI(g) ⇒ H₂9g) + I₂(g)

b. Al(s) + I₂(s)⇒AlI₃(s)

c. FeO(s)+O₂(g)⇒Fe₂O₃(s)

Since all species appear on both side of the ionic equation, there was no reaction.

Same ions present in both side of complete ionic equation are omitted to write net ionic equation. These ions are called the spectator ions.

first step - write down molecular equation as follows:

Al(C2H3O2)3(aq) + 3LiNO3 (aq) --> 3Li(C2H3O2)(aq) + Al(NO3)2(aq)

second step - write complete ionic equation;

Al3+ (aq) + 3(C2H3O2)^- (aq) + 3Li^+(aq) + 3N03^-(aq) -----> 3Li^+(aq) + 3(C2H3O2)^-(aq) + Al^3+(aq) + 3N03^-(aq)

You can see that all ions that appeared on the left hand side of the reaction equation also appeared on the right hand side of the reaction equation, thus thet are omitted. Hence there was no reaction.

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Answer: Volume = 2g

Explanation: In order to calculate the density of an object you divide the mass by the volume (d=m/v). In this case, you have invert the equation to solve for the volume (v=m/d). The mass of 5g/the density of 2.5g = 2g

Hope this helps:)

62.3 mol Ca

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

3.75 × 10²⁵ atoms Ca

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

62.2717 mol Ca ≈ 62.3 mol Ca

Answer:

See explanation

Explanation:

While it is true that there are only about 90 naturally occurring elements, these elements are capable of combining with each other to form millions of substances.

Most of the substances that we see around us today result from a combination of one or more of these naturally occurring elements.

Let us look at three examples;

The carbohydrate in food is composed of carbon, hydrogen and oxygen

The stainless steel materials we use are composed of iron, carbon and other trace elements

Glass is made up of silicon, oxygen and other elements

Only 90 naturally occurring elements capable of combining with each other to form millions of substances.

Compounds:

When two or more elements combine in a certain ratio to form a molecule.

For example-

Water is made up of two hydrogen and one Oxygen ration is 2:1.

If hydrogen and Oxygen combine inn 2:2, they for Hydrogen peroxide.

Water gives life and Hydrogen peroxide can kill a person.

Other examples are,

Therefore, only 90 naturally occurring elements capable of combining with each other to form millions of substances.

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To calculate the percent yield in a Grignard reaction with zinc, we can use the formula Percent yield = (Actual yield/Theoretical yield) x 100.

Calculate the theoretical yield: Theoretical yield is the maximum amount of product that can be obtained based on stoichiometric calculations. In this case, you need to calculate the theoretical yield of the product using the balanced chemical equation for the reaction.

Weigh the actual yield: Actual yield is the amount of product obtained from the reaction experimentally. Weigh the actual yield of the product obtained after performing the reaction.

Calculate the percent yield: The percent yield is the ratio of the actual yield to the theoretical yield multiplied by 100.

The formula for percent yield is:

Percent yield = (Actual yield/Theoretical yield) x 100

For example, let's assume that you performed a Grignard reaction with zinc and obtained 5 grams of the product. If the theoretical yield of the product based on stoichiometric calculations is 7 grams, then the percent yield can be calculated as follows:

Percent yield = (5 grams/7 grams) x 100 = 71.4%

So, the percent yield of the reaction is 71.4%.

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Rain freezing is a condition of "exothermic" process. The freezing rain emits thermal energy, which is then transmitted to the earth. The earth will receive thermal energy if the rain loses thermal energy. As a result, the ground's temperature rises.

Due to the salt in saltwater, it freezes at a lower temperature than fresh water, approximately 28.4 degrees Fahrenheit (ca. -2 °C). However, because only the water portion of saltwater freezes, very little salt is present in the ice when it is formed. Water may be made from it by melting it down.

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Answer:

It would be false.

Explanation:

Mixtures are basically their own substance or whatever, they basically stay the same.

The chart is showing the position -time graph of the movement of ball. The x-axis represents the time of travel and y-axis represents the position of the ball with respect to the time.

The position - time graph is plotting the position of a moving object in with respect to different time. From this plot we can easily understand the displacement by an object. Similarly we can determine the speed of the object from the slope of the line.

The position is expressed in meters and the time is expressed in seconds. If the plot shows a linear curve, then the object is moving with constant speed.

Here, the position of the moving ball is given in  y-axis  0, 2.5 m, 6, 8 and 10 meters with respect to the time given in x-axis as 0 ,4,8,12 and 16 seconds.

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I found this, hope it helps

Heterogeneous nucleation is favored over homogeneous nucleation because it requires a lower energy barrier for the nucleation process. Heterogeneous nucleation involves the formation of a new phase on the surface of an existing foreign material, while homogeneous nucleation occurs spontaneously within a uniform medium.

Heterogeneous nucleation is favored over homogeneous nucleation because it occurs on surfaces or interfaces that are different from the bulk material, providing a lower energy barrier for nucleation to occur.

In contrast, homogeneous nucleation occurs within the bulk material, where there is a higher energy barrier due to the lack of nucleation sites.

As a result, heterogeneous nucleation is more likely to occur and is typically associated with faster and more efficient crystallization processes.

Homogeneous nucleation, on the other hand, can lead to the formation of unwanted impurities and defects in the material due to the high energy required for nucleation.

The presence of the foreign surface in heterogeneous nucleation reduces the overall energy required, making it more likely to occur compared to homogeneous nucleation.

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Answer:

c

Explanation:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{4.78 \times {10}^{24} }{6.02 \times {10}^{23} } \\ =7.940199...\)

We have the final answer as

Hope this helps you

Answer:

A. Alkaline Metals

Explanation:

I majored in Chemistry