How many moles of ch₃nh₃cl need to be added to 200.0 ml of a 0.500 m solution of ch₃nh₂ (kb for ch₃nh₂ is 4.4 × 10⁻⁴) to make a buffer with a ph of 11?

Answer:

Reactivity

Explanation:

a chemical reacting to another chemical is considered a Chemical property because chemicals react with other chemicals differently. Pls PLs give me brainliest

Answer:

reactivity

Explanation:

Unlike protons and neutrons, which are housed inside the atom's nucleus at its center, electrons are found outside the atom.

An atom can have a label in addition to a symbol or atomic number. The label is formatted as "(text)" (without the quotation marks), which means "text, closed curved bracket, open curved bracket." If an isotopic mass is present, it should come after the chemical symbol, followed by the label.

The element is represented by the letter(s) in the centre. The atomic number, which indicates the quantity of protons, is the number in the bottom left corner.

To know more about electrons protons visit:-

https://brainly.com/question/29248303

#SPJ1

Answer:

its base of the number chlorine -37  

Explanation:

The octet rule is applicable to both ionic and covalent bonding. The appropriate responses to the above question are -

B. Carbon with 4 valence electrons can satisfy the octet rule by sharing one electron with four different hydrogen atoms, each with 1 valence electron.

D. Chlorine with 7 valence electrons can satisfy the octet rule by gaining one electron from a lithium atom with only 1 valence electron.

The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a full outer shell of 8 electrons (or 2 electrons for hydrogen).

Option A is incorrect because it suggests that the carbon atom gains one electron from each of the four hydrogen atoms, which would result in the carbon atom having 8 electrons in its outer shell, violating the octet rule.

Option C is incorrect because it suggests that the chlorine atom shares one electron with the lithium atom, which would result in the chlorine atom having only 7 electrons in its outer shell, also violating the octet rule.

For such more questions on Covalent bonding.

https://brainly.com/question/12732708

#SPJ4

Answer:

B

CuO

H2

Explanation:

hydrogen will oxidized to form water

Copper(II) oxide reacts with hydrogen.

\(CuO + H_2\) → \(Cu + H_2O\)

Oxidising agent - \(Cuo\)

Reducing agent - \(H_2\)

A chemical reaction that takes place between an oxidizing substance and a reducing substance.

The oxidizing substance loses electrons in the reaction, and the reducing substance gains electrons.

In the reaction  \(CuO + H_2\) → \(Cu + H_2O\)  

\(Cuo\) is the oxidising agent and  \(H_2\) is the reducing agent because \(Cuo\)  is oxidising  \(H_2\) and \(H_2\) is the reducing agent because it is removing oxygen from \(Cuo\).

Hence, option B is correct.

Learn more about the redox reaction here:

https://brainly.com/question/13293425

#SPJ2

The probability of observing at least one ICU admission, among the next six patients hospitalized for COVID-19 is 0.26491. Option A is correct.

The probability of not observing any ICU admission among the next six patients hospitalized for COVID-19:

Probability of not observing ICU admission = 1 - Probability of observing ICU admission

= 1 - 0.05

= 0.95

Probability of no ICU admission among the next six patients hospitalized for COVID-19:

Probability of no ICU admission in one trial = 0.95

Probability of no ICU admission in six trials (patients)

= 0.95 × 0.95 × 0.95 × 0.95 × 0.95 × 0.95

= 0.73509

Now, we can calculate the probability of observing at least one ICU admission among the next six patients hospitalized for COVID-19:

Probability of at least one ICU admission= 1 - Probability of no ICU admission

= 1 - 0.73509

= 0.26491

Therefore, the answer is A.

Learn more about patients -

brainly.com/question/31288405

#SPJ11

The absence of a positive indication signifies that the system's compressor was functional. As a result, the compressor's work is 15.0 Kcal.

The system loses energy when the corresponding PV work has a negative sign. The work performed by the system is negative if the volume grows at constant pressure (V > 0), which shows that the system has expended energy by working on its surroundings.

The heat extracted from the freezer less the heat discharged via the condenser is the work done by the compressor:

work = heat removed - heat released

= 40.0 Kcal - 55.0 Kcal

= -15.0 Kcal.

To know more about system's compressor visit:-

https://brainly.com/question/15830025

#SPJ1

Answer:

i beleive iron

Explanation:

if the volume decreases from 4.10 to 1.12 l against a constant pressure of 0.801 atm Then The work involved is 324.8 J

The change in volume is V₂ - V₁

∆V = 4.1 - 1.12 L

∆V = 2.98

∆V = 2.98 x 10⁻³ m³

∆V = 3 ×10⁻³ m³

The constant pressure is

p = 0.857 atm = 0.857*101325 Pa

p = 86836 Pa

By definition, the work done is

\(W = \int\limits pdV = 86836 \frac{N}{m²} * (3 ×10⁻³ m³)\)

In physics, work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, for a constant force aligned with the direction of motion, the work equals the product of the force strength and the distance traveled. A force is said to do positive work if when applied it has a component in the direction of the displacement of the point of application. A force does negative work if it has a component opposite to the direction of the displacement at the point of application of the force.

Visit here to learn more about the work: https://brainly.com/question/6578814
#SPJ4

When zinc (Zn) is added to a solution of Bi3+ ions, a black solid of elemental bismuth (Bi) forms. This is because zinc is more reactive than bismuth, so it reduces the Bi3+ ions to Bi atoms. The Bi atoms then come together to form a black precipitate of elemental bismuth. The reaction can be represented as:

Bi3+(aq) + 3Zn(s) → 3Zn2+(aq) + Bi(s)

The black solid that forms is the elemental bismuth (Bi). This reaction can be used as a test to identify the presence of Bi3+ ions in a solution.

To know more about zinc click this link -

brainly.com/question/13890062

#SPJ11

Neutral atoms of all isotopes of a given element have the same number of protons and neutrons.

All the isotopes of the same element consists of the same number of protons, which defines the element.

Depending on the neutron count, different isotopes can exist . This is  because electrons are negatively charged and they can counterbalance the positive charge of protons. Also, they are present in equal numbers in neutral atoms of the same element.

Mass number is formed from the addition of protons and neutrons, which varies between isotopes. An isotope's mass can differ between different isotopes since it depends on its mass number and the masses of the particles that it is formed from.

However, the masses of various isotopes of the same element are extremely close. Hence, this can be challenging to distinguish without the help of specialized tools.

Thus, option (a) is correct.

To know more about neutral atoms here

https://brainly.com/question/30485099

#SPJ4

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question we have

\(density = \frac{15}{14} \\ =1.0714285 ...\)

We have the final answer as

Hope this helps you

Answer:

1) The volume occupied by an atom is composed of mainly empty space

2) Atoms have a very small, relatively dense, central nucleus that is positively charged

3) The region around the nucleus of an atom are orbited by negatively charged electrons in a the same fashion planets orbit around the Sun.

Explanation:

The selection of gold for the gold foil experiment was due to its ability to be rolled into extremely thin sheets such that it was expected for alpha particle to perforate or pass through the foil.

Answer:  6.02x10^22 atoms

Explanation:  1.4 grams is (1.4g/28 g/mole) = 0.05 moles of N2.

(0.05 moles)*(6.02x10^23 molecules/mole) = 3.01x10^22 molecules

(3.01x10^22 molecules)(2 atoms/molecule) = 6.02x10^22 atoms

The amount of heat in joules required to increase the temperature of a 49.5-gram sample of water from 22 degrees Celsius to 66 degrees Celsius is 104,751 Joules.

The formula for calculating the amount of heat required to raise the temperature of an object is given as Q = mcΔT where Q is the heat energy in Joules, m is the mass in kilograms, c is the specific heat capacity in Joules per kilogram Celsius, and ΔT is the change in temperature in Celsius. The specific heat capacity of water is 4.18 Joules per gram Celsius.

Therefore, the amount of heat required to raise the temperature of the 49.5-gram sample of water is calculated as: Q = mcΔTQ = (49.5 g) x (4.18 J/g°C) x (66°C - 22°C)Q = 104,751 Joules The amount of heat in joules required to increase the temperature of a 49.5-gram sample of water from 22 degrees Celsius to 66 degrees Celsius is 104,751 Joules. In order to find out the amount of heat required to increase the temperature of a substance, we use the formula Q = mcΔT. Q is the heat energy in Joules, m is the mass in kilograms, c is the specific heat capacity in Joules per kilogram Celsius, and ΔT is the change in temperature in Celsius. The specific heat capacity of water is 4.18 Joules per gram Celsius. Therefore, we can calculate the amount of heat required to raise the temperature of the 49.5-gram sample of water as: Q = mcΔTQ = (49.5 g) x (4.18 J/g°C) x (66°C - 22°C)Q = 104,751 Joules This means that if we want to increase the temperature of a 49.5-gram sample of water from 22 degrees Celsius to 66 degrees Celsius, we would need to add 104,751 Joules of heat to the system. It is important to note that different substances have different specific heat capacities, which means that the amount of heat required to raise their temperature would be different. Water has a relatively high specific heat capacity, which means that it requires more heat energy to increase its temperature than other substances.

To know more about temperature visit:

https://brainly.com/question/7510619

#SPJ11

According to the nurse preceptor, the new nurse adheres to a number of safe practices while administering red blood cells (RBCs) to a patient.

Based on the given options, the actions that are deemed safe by the nurse preceptor are:

Using large gauge catheters (20-24 gauge). When giving red blood cells (RBCs) to a patient, the novice nurse follows a number of safe procedures, according to the nurse preceptor. To ensure appropriate flushing and lower the chance of an air embolism, the inexperienced nurse correctly primes the intravenous tube with 0.9% sodium chloride in the first step. The second step is for the inexperienced nurse to collect and record a complete set of baseline vital signs. This creates a baseline for monitoring the client's status both before and after the transfusion. Third, in accordance with the advised duration for safe administration, the nurse modifies the infusion rate to administer the RBCs in 4 hours as opposed to 6 hours. Fourth, the inexperienced nurse employs big gauge catheters (20-24 gauge) to promote quick and smooth blood product flow and reduce problems.

To learn more about RBC's, refer to:

https://brainly.com/question/19029068

#SPJ4

Answer:

im not sure, but i believe its T. the dew point is 76.

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

The amount of heat transferred is 312 kJ.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Since the tank is rigid, the mass of the nitrogen remains constant. Therefore, we can ignore the mass (m) in the equation.

Given:

Initial temperature  = 327 K

Final temperature  = 27 K

The specific heat of nitrogen at constant pressure = 1.04 kJ/(kg·K).

ΔT =  27 K - 327 K = -300 K

Q = m × c × ΔT = c × ΔT

Q = 1.04 kJ/(kg·K) × -300 K

Q = -312 kJ

The negative sign indicates that heat is being transferred out of the system (the tank) during the temperature decrease.

Learn more about Specific heat, here:

https://brainly.com/question/31608647

#SPJ4

Single and  double replacement chemical reactions are similar by the fact that in both the types of reactions replacement of ions takes place in case of single displacement it is 1 ion while for double displacement it is 2 ions.

Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction, there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

Learn more about chemical reactions,here:

https://brainly.com/question/14929452

#SPJ1

Answer:

Explanation:

Firstly, it should be noted that melting and freezing points are the same. Thus, when a substance melts at a certain temperature, it means it can also start freezing/solidifying at that same temperature. That been said, when the substance P is a solid at a certain temperature, the other compound Q will boil at that same temperature and hence will be a gas at that same temperature.

If P is solid, it simply means that Q must still be in the liquid state.

From the question, we can see that, the melting point of P and the boiling point of Q are the same. The melting point of a substance is the temperature at which the solid turns to liquid while the boiling point of a substance is the temperature at which a liquid turns to a gas.

If P is solid, it simply means that Q must still be in the liquid state. It has not yet started boiling since the melting point of P and the boiling point of Q are the same.

Learn more: https://brainly.com/question/8553652

The most neutrons are found in the nuclei of gadolinium and holonium.

Because it was formerly believed that molecules were the tiniest objects in the world and therefore could not be separated, the word "atom" is derived form the Greek word meaning "indivisible."

66 protons make up dysprosium.

67 protons make up holonium.

The protons in neodymium are 60.

the 63 protons in europium

64 protons make up gadolinium.

Next, mass number minus proton number equals the amount of neutrons.

157 - 66 = 91 neutron for dysprosium

162 - 67 = 95 neutron for holonium

Neutrons for neodymium are 149 - 60 = 89.

148 - 63 = 85 neutrons for Europium

Gadolinium has neutrons of 159 - 64 = 95.

Holonium and gadolinium have the most neutrons in their nuclei as a result.

To know more about Atoms visit :

https://brainly.com/question/12231872

#SPJ4

The complete Question :

Which of these atoms has the largest number of neutrons in the nucleus?

Check all that apply.

157Dy

162Ho

149Nd

148Eu

159Gd

When drawing a Lewis structure, the next stage is to create a skeletal structure of the molecule or ion, arranging outer atoms symmetrically around a central atom.

This process creates a framework for electron placement in the molecule or ion.

A skeletal structure is a simplified diagram of a molecule or ion that only shows the bonding relationships between atoms and does not show the location of non-bonding valence electrons.

The skeletal structure is decided by finding the central atom and the atoms bonded to it, and then arranging them in such a way that the electrostatic repulsion between electrons is minimized.

After drawing the skeletal framework, the electrons are added to the diagram. Electrons that engage in covalent bonds between atoms are the first to be placed. These electrons are represented as lines between the atoms, indicating the bond's shared pair of electrons.

learn more about Lewis structure here

https://brainly.com/question/20300458

#SPJ1

The resistance of the copper wire is 0.1039 Ω.

In calculating the resistance of a wire, the formula below can be used.

Resistance = (Resistivity*Length of wire)/(Cross-section Area)

The resistivity of copper wire is 1.72 x 10-8 Ωm. The length of the wire is 20.0 m and the area of the wire is 3.3103x10-6 square meters. The area of the wire is calculated by using the formula below.

Cross-section area= (π/4)(diameter)^2

Cross-section area=(π/4)(2.053 mm or 2.053x10-3 m)^2

Cross-section area= 3.3103x10-6 square meters

Calculating for the resistance of the wire:

Resistance= (1.72x10-8 Ωm * 20.0 m)/( 3.3103x10-6 m2)

Resistance=0.1039 Ω

For more information regarding resistance, please refer to the link https://brainly.com/question/17055655.

#SPJ4

The prefix "milli-" is used in the simulation to represent the unit of current as milliamps (mA).

The prefix "milli-" is derived from the metric system and represents a factor of one-thousandth (1/1000). In the context of current, using milliamps allows for more convenient and practical measurements in many electrical and electronic applications.

Current is the flow of electric charge, and in most cases, the currents encountered in everyday situations are relatively small. Using milliamps as the unit of current allows for better resolution and ease of measurement compared to using amps, which is the base unit of electric current in the International System of Units (SI).

By using milliamps, the simulation can represent currents that are more commonly encountered in various electrical circuits and devices, making the measurements more practical and relevant to real-world scenarios.

To know more about milliamps click this link -

brainly.com/question/30459530

#SPJ11

SeOBr2 has tetrahedral electron pair geometry and pyramidal structure and  SeF6 has octahedral electron pair geometry and octahedral structure as there is no lone pair of electron.

Lewis structure is also known as electron dot structure. This involves simplified diagrams used to represent the bonding of atoms in a molecule. In this type of representation, nonbonded electrons are shown as dots around the atoms while bonded electrons are shown as lines between the atoms.  from infrared and polarized Raman spectroscopy suggests that selenium oxobromide adopts a pyramidal molecular geometry with Cs symmetry.

In the Lewis structure of SeOBr2, it has 3 sigma bonds, one lone pair of electron and has the steric number 4.it has sp3 hybridization. it shows tetrahedral electron pair geometry. it shows a pyramidal structure.

In the Lewis structure of SeF6, it has 6 sigma bonds, no lone pair of electron and has the steric number 6. it has sp3d2 hybridization. it shows octahedral electron pair geometry. it shows a octahedral structure.

To learn more about Lewis structure please visit:

https://brainly.com/question/20300458

#SPJ4