In other compounds this element also can accommodate up to 12 electrons rather than the usual octet. what element could?

The molarity of 60.0 mL H₂SO₄ if it is titrated against 50.0 mL of 0.300 M NaOH is approximately 0.25 M.

The molarity of H₂SO₄, we first need to set up the balanced neutralization equation between H₂SO₄ and NaOH:

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H2O

The balanced equation shows that 1 mole of H₂SO₄ reacts with 2 moles of NaOH.

Volume of NaOH solution (V1) = 50.0 mL = 50.0 cm³ = 50.0 * 10^(-3) L

Molarity of NaOH solution (M1) = 0.300 M

Volume of H₂SO₄ solution (V2) = 60.0 mL = 60.0 cm³ = 60.0 * 10^(-3) L

The molarity of H₂SO₄ (M2), we can use the following equation:

M1V1 = M2V2

Substituting the given values:

(0.300 M)(50.0 * 10^(-3) L) = M2(60.0 * 10^(-3) L)

Simplifying the equation:

0.015 = 0.06M2

Dividing both sides by 0.06:

M2 = 0.015 / 0.06 ≈ 0.25 M

To learn more about molarity refer here:

https://brainly.com/question/2817451#

#SPJ11

Answer:The pH of a buffer prepared by adding 1.00 L of 1.0 M HCl to 750 ml of 1.5 M NaHCOO is 2.84

What is pH?

pH is a measure of the acidity of a solution.

pH is calculated from the negative logarithm to base ten of the hydrogen ions concentration of the solution.

For weak acids such as those used in the preparation of buffers, the acid dissociation constant, Ka are used to determine the pH of the solution.

Therefore, from the Ka of acetic acid, the pH of a buffer prepared by adding 1.00 L of 1.0 M HCl to 750 ml of 1.5 M NaHCOO is 2.84

The best reagent for each step is NaNH2, NH2 and CH3I, and HBr.

First of all in the presence of strong base ammonia, we het the clcylated product chain elongation gives but-2-ene followed by bromination gives 2-dibromobutane.

Alkyne using NH3 gets converted into Elongated chain alkyne followed by Hbr.

The reaction of bromine with (E)-stilbene is a classic reaction performed as an example of an electrophilic addition reaction of alkenes. The reaction is stereospecific through an anti addition to the double bond. The traditional reaction uses a bromine solution in methylene chloride, which has very high toxcity.

This bromination reaction demonstrates the stereochemistry of the electrophilic addition of bromine to an alkene. The bromine in this greener approach is generated in situ and eliminates the use of methylene chloride.

To know more about bromination here

https://brainly.com/question/26954199

#SPJ4

Answer:

In fall and spring the planets axis is in line with the sun. It's directly over the equator, equally hitting the northern and southern hemispheres.

S of the system is also negative. The reason for this is that energy is released when the water vapor molecules come together and form a more ordered state as liquid.

This means that the enthalpy, which is a measure of the total heat content of the system, decreases. At the same time, the entropy, which is a measure of the disorder of the system, also decreases because the water molecules are becoming more ordered.
At temperatures below 100°C, the enthalpy change is negative, which means that energy is released when the steam condenses. This, combined with the positive change in entropy, means that the process is spontaneous and ?G is negative.
At temperatures greater than 100°C, condensation is not spontaneous because the absolute value of the T·?S term in the Gibbs free energy equation is less than the absolute value of the ?H. This means that the change in free energy, ?G, is positive, which indicates that the process is not spontaneous. The reason for this is that at higher temperatures, the increase in entropy due to the formation of liquid is not enough to offset the decrease in enthalpy, which is still negative. Therefore, at these temperatures, the process is not spontaneous and external energy must be added to drive the reaction in the reverse direction.

For more questions on energy

https://brainly.com/question/10063455

#SPJ11

The correct answer is B. Metalloids

Explanation:

In this periodic table, the green boxes include elements such as Boron (B), Arsenic (As), and Antimony (Sb). All these elements are known in chemistry as semimetals or metalloids. This classification is because these elements cannot be completely classified into metals or non-metals. Moreover, they all display similar properties including some level of conductivity, malleability, and solid-state. According to this, the correct answer is B.

Answer:

B. Metalloids

Explanation:

Endothermic and exothermic reactions are two types of chemical reactions that differ in terms of the heat energy involved and the direction of heat flow.

Endothermic reactions absorb heat energy from the surroundings, resulting in a decrease in temperature. These reactions have a positive change in enthalpy (ΔH), meaning that the products have higher energy than the reactants. An example of an endothermic reaction is the process of photosynthesis, where plants absorb energy from sunlight to convert carbon dioxide and water into glucose and oxygen.Exothermic reactions release heat energy into the surroundings, leading to an increase in temperature. These reactions have a negative change in enthalpy (ΔH), indicating that the products have lower energy than the reactants. Combustion reactions, such as burning wood or fuel, are common examples of exothermic reactions.Enthalpy (H) is a thermodynamic quantity that represents the total heat content of a system. It includes both the internal energy of a system and the work done by or on the system. In the context of chemical reactions, the enthalpy change (ΔH) represents the heat energy exchanged during the reaction. For endothermic reactions, ΔH is positive, while for exothermic reactions, ΔH is negative.The rate of a chemical reaction is closely related to the frequency and effectiveness of particle collisions. The collision theory states that for a reaction to occur, particles must collide with sufficient energy and proper orientation.

Particle collisions play a crucial role in chemical reactions because they bring reactant molecules into close proximity, allowing them to interact and form new products. When particles collide, their kinetic energy determines whether the collision will result in a successful reaction. If the collision has sufficient energy (equal to or greater than the activation energy), and the particles are correctly oriented, they can overcome the energy barrier and undergo a chemical transformation.The collision theory helps explain factors that influence reaction rates, such as temperature, concentration, and catalysts. Increasing the temperature provides particles with more kinetic energy, leading to a higher collision frequency and increased reaction rate. Similarly, higher reactant concentrations increase the likelihood of collisions and, consequently, the reaction rate. Catalysts work by providing an alternative reaction pathway with lower activation energy, enabling more successful collisions and accelerating the reaction.Understanding the collision theory is essential for predicting and controlling reaction rates, optimizing reaction conditions, and designing efficient chemical processes.

for more such questions Endothermic

https://brainly.com/question/6357350

#SPJ11

The magnification will be 9x.

A telescope is a device which is used to watch the objects far away in the space. In this device, different lenses are used and a reflecting surface is also used.

This light is reflected on a large mirror surface and the telescope has eyepiece which helps to see the object.

The magnification is the function between the focal length and the distance through which object is to be viewed.

Here,

The magnification will be 450/ 50 = 9x

Therefore the magnification of the eyepiece will be 9x.

To know more about magnification, refer: https://brainly.com/question/28049436

#SPJ9

The probability that the sample mean amount contained is less than 42.945 grams is 0.41 or 41%.

In this question, we need to use the concept of the sampling distribution of the mean. We know that the energy bar's mean amount contained is 43 grams with a standard deviation of 0.5 grams. If a sample of 4 energy bars is selected, we want to find the probability that the sample mean amount contained is less than 42.945 grams.

The sample size is 4, which is considered a small sample. Hence, we cannot use the normal distribution and instead will use the t-distribution. To find the t-score, we can use the following formula:

\($$t = \frac{\bar{x} - \mu}{s/\sqrt{n}}$$\)

where \($\bar{x}$\) is the sample mean,

\($\mu$\) is the population mean,\($s$\) is the sample standard deviation,

and\($n$\)is the sample size. Substituting the given values,

we get\(:$$t = \frac{42.945 - 43}{0.5/\sqrt{4}}$$\)

Simplifying this, we get:\($$t = \frac{-0.055}{0.25} = -0.22$$\)

Using a t-distribution table with 3 degrees of freedom (n - 1), we find that the probability of getting a t-score less than -0.22 is approximately 0.41.

Therefore, the probability that the sample mean amount contained is less than 42.945 grams is 0.41 or 41%.

For more such question on probability visit:

https://brainly.com/question/25908329

#SPJ8

Answer:

milk liquid

helium gas

granite solid

oxygen gas

steel solid

gasoline liquid

Answer: Milk is liquid. Helium is gas. Granite is solid. Oxygen is gas. Steel is solid. Gasoline is liquid.

Explanation:

We need to balance the equation

\(\sf \bullet\quad H_2 + O_2 \longrightarrow H_2O \)

By adding 2 moles of \(\sf H_2 \) on the both sides

\(\sf \bullet \quad 2H_2+O_2 \xrightarrow{\;By\:balancing\;} H_2O\)

Hence, balanced !

Diagrams C best represents the ions that are present in significant concentrations in the solution.

An atom or molecule is said to be an ion if more than one of its valence electrons have been gained or lost, giving it an overall positive and negative electrical charge.

In other terms, a chemical species has an unbalanced ratio of protons, which are positively charged particles to electrons (negatively charged particles). Diagrams C best represents the ions that are present in significant concentrations in the solution.

Therefore, the correct option is option A.

To know more about ions, here:

https://brainly.com/question/14982375

#SPJ1

Your question is incomplete but most probably your full question was,  

Answer:

Save earth, and universe

The best statement among the following which explains whether alchemy is a science or pseudoscience is "It is pseudoscience because each metal is known to be a unique element." Hence, Option (D) is correct.

Alchemy began to fully evolve into chemistry in the 17th century, with a greater emphasis on rational thought and experimentation and less emphasis on spirituality and mysticism.

The alchemists were never successful in changing lead into gold, but modern nuclear physics can accomplish this task.

Therefore , The best statement among the following which explains whether alchemy is a science or pseudoscience is "It is pseudoscience because each metal is known to be a unique element." Hence, Option (D) is correct.

Learn more about Alchemy here ;

https://brainly.com/question/5997100

#SPJ2

This is a stoichiometry question, and will be answered in two steps, but the first thing for every stoichiometry question is to have the reaction properly balanced, which the question already provided us:

S8 + 8 O2 -> 8 SO2

First step is to find the limiting and excess reactant, this will tell us which element is in excess and by how much, let's gather the data for the reactants first:

30.14 grams of S8, molar mass of S8 is 256.5g/mol

287.43 grams of O2, molar mass of O2 is 32g/mol

Now we will focus on S8, and see how many moles we have of it in this reaction:

256.5 g = 1 mol

30.14 g = x moles

x = 0.12 moles of S8 in this reaction

According to the molar ratio, 1:8, we need 1 mol of S8 and 8 moles of O2 in order to have the reaction to proceed

1 S8 = 8 O2

0.12 S8 = x O2

x = 0.96 moles of O2 if we have 0.12 moles of S8

We only need 0.96, if we have more than that, is excess, if we have less than that, this means that O2 is the limiting and S8 is in excess, so let's check how much of O2 we do have

32g = 1 mol

287.43 g = x moles

x = 8.98 moles of O2, we have a big excess of O2, we only need 0.96 moles and we have almost 9 times more

Now that we know which element is the limiting, we can use this information to find the theoretical yield of SO2

The molar ratio will also be 1:8, and since we have 0.12 moles of S8, we will have 8 times that, which is 0.96 moles of SO2, using its molar mass, 64.1g/mol, we will have the theoretical yield

64.1g = 1 mol

x grams = 0.96

x = 61.5 grams is the theoretical yield

55.59 grams is the actual yield

Now we use these two values in the percent yield formula:

%yield = actual yield/theoretical yield

%yield = 55.59/61.5

%yield = 0.90

Limiting reactant = S8

Excess reactant = O2

Percent yield = 90%

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

To know more about temperature  visit:

https://brainly.com/question/7510619

#SPJ11

Answer:

Make Recycle Bins Easily Accessible

Ditch Single-Use Waste

Minimise Paper Waste

Designate a Drawer for Scrap Paper

Eco-Friendly Lunches

Answer:

copper

Explanation:

coal, petroleum, and natural gas are all related to fossil fuels.

Copper is not a fossil fuel and the correct option is option 1.

Fossil fuels are compound mixtures made of fossilized plant and animal remnants from millions of years ago. The creation of fossil fuels—either oil, natural gas, or coal—from these fossils is determined by the type of fossil, the amount of heat, and the amount of pressure.

Fossil fuels are a non-renewable source of energy. Most of the energy used by us is obtained by the burning of fossil fuels. These fossil fuels are used up at a faster rate. They cannot be regrown at a scale compared to their consumption.

Therefore, Copper is not a fossil fuel and the correct option is option 1.

Learn more about Fossil fuels, here:

https://brainly.com/question/3371055

#SPJ2

The number of moles of the excess reactant that is left over is 0.37 moles

The excess reactant refers to the reactant that is present in a greater quantity than what is required for complete reaction with the other reactant(s). The other reactant is referred to as the limiting reactant.

Number of moles of P = 2.5 moles

Number of moles of bromine = 3.20 moles

We have that the stoichiometry gives that;

2 moles of P reacts with 3 moles of bromine

2.5 moles of P reacts with  2.5 * 3/2

= 3.75 moles

Hence bromine is the limiting reactant

If 2 moles of P reacts with 3 moles of bromine

x moles of P reacts with  3.20 moles of bromine

x = 2.13 moles

Moles of excess reactant left = 2.50 - 2.13 moles

= 0.37 moles

Learn more about excess reactant:https://brainly.com/question/31209189

#SPJ4

Answer:

hope it helps.

Explanation:

Zinc metal dissolves slowly in dilute sulphuric acid to form solutions containing the aquated Zn(II) ion together with hydrogen gas, H2.

The molarity of the given solution is 2 M, the freezing point of the solution is 0.806 °C and the molality of water solution is 2.98 m.
Solving the sub questions
a) To evaluate the molarity of a solution, we use the formula:
Molarity = (Total number of solute moles) / (Volume of solution in liters)
Here, it is given 22g of CaCl2 and its molecular mass is 110.0 g/mol.
Then, the number of moles of CaCl2 is:
Count of moles = Mass / Molecular mass
                 = 22 g / 110.0 g/mol
                 = 0.2 mol
The volume of the solution is given as 100.0 ml which is equal to 0.1 L.
So, the molarity of the solution is:
Molarity = Total Number of moles / Volume of solution in liters
        = 0.2 mol / 0.1 L
        = 2 M
So, the molarity of the CaCl2 solution is 2 M.
b) The evaluated freezing point depression is derived applying the formula:

ΔTf = Kf x m

Here,
ΔTf = freezing point depression,
Kf = depression freezing point constant of water (1.86 °C/m),
m = molality of the solution.
First, we need to evaluate the molality of the solution:
Molality = (Total number of solute moles) / (Mass of solvent in kg)
Here, we have 0.650 mol of C12H22O11 and 1.50 kg of H2O.
The molecular mass of C12H22O11 is 342.3 g/mol.
Number of moles of CC12H22O11CC12H22O1112H22O1112H22O11 = Mass / Molecular mass
= 0.650 mol
Mass of H2O = 1.50 kg
Molality = (0.650 mol) / (1.50 kg)
        = 0.433 mol/kg
Now that we have the molality, we can calculate the freezing point depression:
ΔTf = Kf x m
   = (1.86 °C/m) x (0.433 mol/kg)
   = 0.806 °C
Therefore, the freezing point of the sugar solution is lowered by 0.806 °C.
c) To calculate the molality of a water solution if the freezing point is -5.54 degree Celsius, we can use the formula:

ΔTf = Kf × m

where ΔTf is the freezing point depression, Kf is the molal freezing point depression constant for water (1.86 °C/m), and m is the molality of the solution.

We can restructure this formula to evaluate  m:

m = ΔTf / Kf

Substituting the given values:

m = (-5.54 °C) / (1.86 °C/m)

m = -2.98 m

Therefore, the molality of the water solution is 2.98 m.

To learn more about molality
https://brainly.com/question/30463605
#SPJ1

The balanced chemical equation for the formation of ammonia gas by the reaction between nitrogen gas an hydrogen gas is N2+3H→2NH3

Ammonia can be defined as inorganic compound of nitrogen and hydrogen with the formula NH₃. A stable binary hydride and the simplest pnictogen hydride ammonia is a colourless gas with a distinct pungent smell.

Therefore about 80% of the ammonia produced by industry is used in agriculture as fertilizer. Ammonia is also used as a refrigerant gas for purification of water supplies and in the manufacture of plastics, explosives, textiles, pesticides, dyes and other chemicals.

Learn more about ammonia here : brainly.com/question/23173081

#SPJ1

Answer:

It's Mass

Explanation: I took the quiz

Have a good day!

Mass is the amount of matter in an object. Therefore, option C is correct.

Mass can be defined as an intrinsic property of a body. mass can be described as the quantity of matter in a body. Different atoms and different particles with the same amount of matter have nonetheless different masses.

Mass can be experimentally measured by the body's inertia, meaning the resistance to acceleration when a net force is applied. The mass determines the strength of its gravitational attraction to other bodies.

The SI base unit of measurement of mass is the kilogram (kg) and it is not the same as weight. Mass is generally determined by measuring the weight using a spring scale, rather than a balance scale and comparing it to known masses.

An object on the Moon will weigh less than it does on Earth due to the lower gravity but still have the same mass. Weight can be defined as a force, while mass is the property that determines the strength of this force.

Learn more about mass, here:

https://brainly.com/question/13040516

#SPJ6

The number of protons and neutrons in uranium 235 is 92 and 143 respectively.

Uranium-235 (235U) is a radioactive isotope of uranium.

Uranium is a chemical element with an atomic number of 92. Therefore, Uranium-235 (235U) has 92 protons.

Uranium-235 (235U) has a mass number of 235. Since the number of protons is 92, the number of neutrons can be calculated as follows :

Number of neutrons = Mass number - Atomic number= 235 - 92= 143

Therefore, Uranium 235 has 143 neutrons.

Thus, the required answers are : protons = 92, neutrons = 143

To learn more about Uranium-235 :

https://brainly.com/question/30264157

#SPJ11

Answer:

• pH = 3.0

• pH = 2.70

• pH = 3.61

• pH = 8.28

• pH = 1.40

Explanation:

El pH es una medida en química usada para determinar el grado de acidez o basicidad en una solución.

Se define como:

pH = -log₁₀ [H⁺]

El - logaritmo de la concentración molar de H⁺

Para las concentraciones de H⁺ dadas:

• [H+] = 0.001 M

pH = -log (0.001M) = 3

pH = 3.0

• [H+] = 0.002 M

pH = -log (0.002M)

pH = 2.70

• [H+] = 2.45X10-4 M

pH = -log (2.45X10-4 M )

pH = 3.61

• [H+] = 5.2X10-9 M

pH = -log (5.2X10-9 M)

pH = 8.28

• [H+] = 0.04 M

pH = -log (0.04M)

pH = 1.40

\(\huge\green{\boxed{\fcolorbox{red}{black}{ \orange{QUESTION} }}}\)

what is difference about scientist thinking and common peoples thinking and what is logical thinking

\( \huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}\)

\( \orange{\underline{\huge{\bold{\textit{\green{\bf{DIFFERENCE}}}}}}} \)

\( \orange{\underline{\huge{\bold{\textit{\green{\bf{BETWEEN}}}}}}} \)

SCIENTIST THINKING and COMMON PEOPLES THINKING:-

\(\blue{SCIENTIST\: \: \: THINKING-> }\)

They believe in asking questions to themselves and try to find there answers by themselves with help of there observation with large number of observation sometimes they also provide a hypothesis.

They use always use critical thinking which helps one to think and solve one situation beyond its memory. this helps to find new ideas

They use inductive reasoning or deductive reasoning to develop a hypothesis deriving most logically from available data.

\( \orange{COMMON \: \: PEOPLES \: \: THINKING-> }\)

They believe easily on what other told them to believe. common people relay on the answer of the experts or scientists then researching on the topic themselves

Critical thinking is rare in Common public thinking bez in our daily routine we believe on what we read and hear.

logical thinking is found rare in common public as they didn't think about the logic of what is happening in day to day life .

\(\bold{\green{Part 2:- What \: Is \: Logical \: Thinking}}\)

It the way of thinking in which we check about the logic of the what is happening around u

In this type of Thinking a person finds reasons and causes of each and every observation

This helps in new law formation and helps in finding the solution of each and every problem.

With the logical thinking one uses feedback in positive way and try to solve that.

This type of thinking our lines become short and clear . this helps us to give perfect answer for each and everything.

Answer:

It would be the chloride ion, with a charge of

1

−

.

Explanation:

A neutral chlorine atom has the electron configuration

1s

2

2s

2

2p

6

3s

2

3p

5

. In an ionic compound, chlorine gains the sixth

3p

electron, most likely when reacting with a metal such as sodium (Na), forming the chloride ion,

Cl

−

.

The image below represents the formation of the ionic compound sodium chloride,

NaCl

. The bond is formed by the electrostatic attraction between the positive and negative ions.

Answer:

A

Explanation:

From the reaction given you look at the direction of the reaction by looking the arrow.

Reactants combine to form products from the reaction silver,oxygen and hydrogen sulfide are reactants