7. A scientist is trying to determine the identity of an element. It is highly reactive in water
and forms an ionic bond with chlorine. It is also very shiny. The element is likely
(1 point)
from Group 17.
from Group 1.
from Group 15.
a noble gas.

Answer:

Hi I think that its oats.

Explanation: It has fiber and vitamin c

At pOH value  of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

In this question we will apply the formula

      pH +pOH = 14 . . . . . . . . . . . . .(1)

where pH = concentration of [\(H^{+}\) ] ion

pOH = concentration of [\(OH^{-}\) ] ion

As per the question

pOH =6.0

Putting the value of pOH in equation (1) we get the value of pH

              pH + 6.0 =14

             pH = 14 -6.0

             pH  = 8.0

 The value of pH if the pOH value is 6.0 is 8.0

To find the concentration of \(H^{+}\) ion we will use the following formula

This is calculated by the formula

                                 [\(H^{+}\)} = \(10^{-pH}\)

where we will write the values of pH

Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)

Therefore at  pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

Read more about pH

https://brainly.com/question/11300720

The complete question is -

What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?

Answer:

The correct option is A

Explanation:

Now from the question we are told that the purification of benzoin was not successful and generally for every substance , it melting point at the pure state is higher that its melting point at its impure state, with this knowlege and the information given in the question that the melting point of benzoin at it pure state is  (134-138 ) °C, we can deduce that the melting we may measure  if we  did not successfully purify benzoin and it is still contaminated with anthracene is  (120-130) °C

The least basic compound is p-Nitroaniline. Option C

The term basicity has to do with the ability of a compound to attract a proton. Now we know that the more basic the compound is the more it has the capacity to attract a proton.

We know that if the lone pair on the nitrogen is unavailable then the basicity of the compound could be lost owing to the fact that the lone pair is completely unavailable and can not participate in resonance.

If we look at the compounds that have been listed among the options, we can notice that p-Nitroaniline is deactivated by resonance at the para-position hence the lone pair on the -NH2 moiety is unavailable thus the compound is the least basic compound.

Learn more about p-Nitroaniline:https://brainly.com/question/14407901

#SPJ1

If an equation includes 7(CrO₄)₂, the numbers of Cr's and O's atoms that are there are 14 and 56 respectively.

The number of atoms present in a chemical compound can be calculated by multiplying the subscript of the particular element by any coefficient.

According to this question, 7 moles of chromate with the chemical formula; (CrO₄)₂ is given. The number of oxygen and chromium atoms in this compound can be calculated as follows:

Learn more about no of atoms at: https://brainly.com/question/14190064

#SPJ1

Answer:

985.2 moles of nitrogen can produce 1970.4 moles of ammonia.

Explanation:

The balanced chemical equation for the production of ammonia from nitrogen is:

N2 + 3H2 → 2NH3

From the balanced equation, we can see that 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia.

So, to determine how many moles of ammonia can be produced from 985.2 moles of nitrogen, we need to use the mole ratio from the balanced chemical equation as follows:

985.2 moles N2 x (2 moles NH3 / 1 mole N2) = 1970.4 moles NH3

Therefore, 985.2 moles of nitrogen can produce 1970.4 moles of ammonia.

A 50.0 mL solution of 0.250 M HC₂H₃O₂ before and after adding 50 mL of 0.250 M NaOH has a pH of 2.87, the pH changes due to the formation of a buffer solution, which can be calculated using the Henderson-Hasselbalch equation.

This problem requires us to calculate the pH of a buffer solution after the addition of a strong base. A buffer solution is one that resists pH changes when modest amounts of acid or base are added. The buffer system in this case is the weak acid, acetic acid (HC₂H₃O₂) and its conjugate base, acetate ion (C₂H₃O₂-).

Before the addition of NaOH, we have a solution of 0.250 M HC₂H₃O₂, which we can assume to be completely dissociated in water:

HC₂H₃O₂ + H₂O ⇌ H₃O+ + C₂H₃O₂-

HC₂H₃O₂ has a Ka value of 1.8 x 10-5. We can use this Ka value to calculate the equilibrium concentration of H3O+ and C₂H₃O₂- in the solution.

First, we need to calculate the initial concentrations of HC₂H₃O₂ and C₂H₃O₂-.

moles of HC₂H₃O₂ = 0.250 M × 0.0500 L = 0.0125 mol

moles of C₂H₃O₂- = 0 mol (since there is no NaOH added yet)

Since HC₂H₃O₂ is a weak acid, it only partially dissociates in water. The equilibrium concentrations of H₃O+ and C₂H₃O₂- can be calculated using the Ka expression:

Ka = [H₃O+][C₂H₃O₂-]/[HC₂H₃O₂]

We can assume that the initial concentration of H3O+ is negligible compared to the amount that will be produced by the dissociation of HC₂H₃O₂, so we can simplify the expression to:

Ka = [H₃O+]²/[HC₂H₃O₂]

[H₃O+]² = Ka × [HC₂H₃O₂]

[H₃O+]² = 1.8 × 10⁻⁵ × 0.0125

[H₃O+] = 1.34 × 10⁻³ M

Now that we know the equilibrium concentration of H₃O+, we can use the pH formula to calculate the pH:

pH = -log[H₃O+]

pH = -log(1.34 × 10⁻³)

pH = 2.87

This is the pH of the buffer solution before the addition of NaOH.

Next, we add 50 mL of 0.250 M NaOH to the solution. NaOH is a strong base, so it completely dissociates in water to produce OH- ions:

NaOH → Na+ + OH-

The OH- ions will react with the acetate ions in the buffer solution to form water and acetate ions:

OH- + C₂H₃O₂- → H₂O + C₂H₃O₂-

This reaction will consume some of the acetate ions in the buffer solution, causing the equilibrium to shift to the left to produce more acetate ions.

To calculate the new concentrations of H₃O+ and C₂H₃O₂-, we need to use the Henderson-Hasselbalch equation:

pH = pKa + log([C₂H₃O₂-]/[HC₂H₃O₂])

where pKa = -log(Ka), [C₂H₃O₂-] is the equilibrium concentration of acetate ions, and [HC₂H₃O₂] is the equilibrium concentration of acetic acid.

To learn more about buffer solution, visit: https://brainly.com/question/8676275

#SPJ1

Answer:

I think C

Explanation:

because hydrogen on the right side only have two while on the left side it have 4

Answer:

The answer is A. No Oxygen is Unbalanced

Explanation:

I took the test. You got this.

The equation that relates A and W, considering the desired 15% acetic acid concentration, is 3W = 2.55M.

The equation A = (3/17)W represents the relationship between the mass of acetic acid (A) and the mass of water (W) in the mixture. It states that the mass of acetic acid is equal to three seventeenths (3/17) of the mass of water.

Since the company wants the acetic acid to be 15% of the total mass of the mixture, we can set up another equation to represent this requirement. Let M be the total mass of the mixture. The mass of acetic acid (A) is 15% of the total mass, so we have A = 0.15M.

Now we can substitute A in terms of W from the first equation into the second equation: (3/17)W = 0.15M. We can simplify this equation by multiplying both sides by 17 to get 3W = 2.55M.

This equation allows the company to calculate the mass of water (W) required for a given mass of acetic acid (A) to maintain the desired concentration in the mixture.

For such more questions on concentration

https://brainly.com/question/26175405

#SPJ8

Answer:

A binary ionic compound contains an ion that is a metal (cation) and an ion that is a nonmetal (anion).

Explanation:

Tell me if its wrong

Answer:

What causes what to be different?

Explanation:

Whatever it is, just find out what "it" has which other "its" don't.

1) Diesel has a higher viscosity than petrol.

2) Petrol is more flammable than diesel.

3) The formula will be C₁₀H₂₂.

4) The equation is; 2C8H18+25O2→16CO2+18H2O.

Depending on the precise composition and temperature, the viscosity of gasoline and diesel can change. In general, diesel is more viscous than gasoline. Higher viscosity fluids are thicker and flow more slowly than lower viscosity fluids because viscosity relates to the resistance of a fluid to flow.

Diesel is less flammable than gasoline. The lowest temperature at which gasoline can evaporate and turn into an ignitable combination in air is known as its flash point, and it is lower for gasoline. Compared to diesel fuel, petrol vapors are much more flammable and can ignite at lower temperatures.

Learn more about hydrocarbon:https://brainly.com/question/31643106

#SPJ1

Answer:

D

Explanation:

According to Avogadro's law, equal volumes of different gases at the same temperature and pressure have equal number of molecules.

It cannot however be a because according to ideal gas equation the number of moles in each container is 0.999moles which translates to 6.019*10^23 molecules

Answer:

Both containers have the same number of molecules.

Explanation:

Answers

1) the relationship is directly proportional, as temperature increases, volume increases In the same was.

2) an increase in pressure causes particles to move closer together, decreasing the volume.

3) it would increase

4)V.

5) the mass of each gas

1) The relationship between volume of a gas and its temperature, in Kelvin, assuming pressure is held constant is best shown by the statement; "The relationship is directly proportional, as temperature increases, volume increases in the same way."

2) The statement " an increase in pressure causes particles move closer together, decreasing the volume." explains the changes that occur when pressure is increased at constant temperature.

3) From the ideal gas law, the pressure increases as temperature increases

4) Following from Boyle's law; the volume decreases as the pressure increases.

5) The number of moles of each gas of each gas can be different.

Charles law states that; the volume of a given mass of gas is directly proportional to its temperature at constant pressure. This implies that, given a mass of gas, the temperature increases as the volume increases at constant temperature.

According to Boyle's law the volume of a given mass of gas is inversely proportional to its volume at constant temperature. This simply implies that as pressure increases as volume decreases(inverse proportionality and vice versa).

The pressure and  temperature are directly proportional to each other when other variables are held constant.

From Avogadro's law, the volume of a given mass of gas is directly proportional to the number of moles( V α. n).  Therefore, the number of moles of each gas of each gas can be different when the gases are held at the same pressure, volume, and temperature.

Learn more; https://brainly.com/question/24518540

We can produce more products by;

A. Increasing the concentration of H₂ gas in the reaction vessel

B. Decreasing the temperature in the reaction vessel

C. Removing the H₂O from the reaction vessel as it forms

Water is created through an exothermic process. Heat energy is released when hydrogen gas (H2) and oxygen gas (O2) mix to make water (H2O). An exothermic reaction is characterized by this energy release.

The reaction's overall energy change is negative, which shows that energy is released. The reaction is exothermic because the extra energy is released as heat into the environment.

Learn more about exothermic reaction:https://brainly.com/question/28546817

#SPJ1

Missing parts;

Water can be made using the reversible reaction shown. Which change would

keep this reaction from shifting to form more of the product?

2H₂+022H₂O + energy

A. Increasing the concentration of H₂ gas in the reaction vessel

B. Decreasing the temperature in the reaction vessel

C. Removing the H₂O from the reaction vessel as it forms

D. Increasing the temperature in the reaction vessel

6) When 10.000 g of a hydrated compound are analyzed in the laboratory, the following analysis is obtained: 1.425 g of water, 5.462 g of lead, 1.266 g of carbon, 1.687 g of oxygen, and 0.160 of hydrogen. What are the name and formula of the compound?

The name and formula of the compound can be determined by analyzing the data given in the question. Based on the information provided, the compound contains lead, carbon, oxygen, and hydrogen. The molecular formula for the compound can be determined by adding up the number of atoms of each element present.

From the data given, the compound contains 1.266 g of carbon, which is equivalent to 1.266/12.01 = 0.105 mol of carbon atoms. It also contains 5.462 g of lead, which is equivalent to 5.462/207.2 = 0.026 mol of lead atoms. The compound also contains 1.687 g of oxygen, which is equivalent to 1.687/16.00 = 0.105 mol of oxygen atoms, and 0.160 g of hydrogen, which is equivalent to 0.160/1.01 = 0.158 mol of hydrogen atoms.

The molecular formula for the compound is therefore Pb(C2H2O2). However, it is also mentioned that the compound is hydrated, which means that it contains water. The 1.425 g of water present in the compound is equivalent to 1.425/18.02 = 0.079 mol of water molecules. The compound 1 likely Pb(C2H2O2)·xH2O, where x represents the number of water molecules present in the compound.

Answer:

So you download the doc and do it.

Explanation:

So you download the doc and do it.

To draw the skeletal structure from a Lewis structure, you need to identify the central atom and its bonded atoms.

To draw the skeletal structure from a Lewis structure, you need to identify the central atom and its bonded atoms. The central atom is usually the least electronegative atom in the molecule, and it is surrounded by the other atoms that are bonded to it.

Here are the steps to draw the skeletal structure from a Lewis structure:

Identify the central atom: In the Lewis structure, the central atom is usually the atom that has the most connections to other atoms.

Count the total number of atoms: Count the total number of atoms in the molecule or ion.

Replace the bonding electrons with dashes: Replace the bonding pairs of electrons between the atoms with dashes (-).

Arrange the atoms: Arrange the atoms in a way that makes sense based on their connectivity in the Lewis structure. The atoms should be positioned in a way that minimizes the number of intersections between the dashes.

Add lone pairs: If there are any lone pairs of electrons on the central atom, add them to the skeletal structure as dots.

Check for consistency: Make sure the skeletal structure you have drawn is consistent with the Lewis structure in terms of the number of electrons, the types of atoms, and the bonding pattern.

Learn more about Lewis structure:https://brainly.com/question/20300458

#SPJ1

Answer:

b. The sharply peaked roof of the building is outlined against a sea of other rooftops stretching way into the distance.

Explanation:

A metaphor may be defined as that figure of speech which is used to describe the action or an object in such a way that it is not literally true. A metaphor is only used to make a comparison or explain the idea.

In the context, the metaphor is the sea. In the sentence the boundary of the peaked roof of the building is being stretched with the others rooftops which has been compared to the sea of rooftop as there are a large number of  rooftops that are stretching in the way.

The equilibrium concentrations of the gases are:

[H2] = 0.865 M, [CO2] = 0.865 M, [CO] = 1.135M ,[H2O] = 1.135 M.

The sum of the molar concentrations of the reactants (H2 and CO2) is equal to the sum of the molar concentrations of the products (CO and H2O), as expected for a reaction at equilibrium.

The equilibrium concentrations of the four gases can be determined using the equilibrium constant expression and the initial concentrations of the reactants.

The equilibrium constant expression for the reaction is:

K_eq = [CO][H2O]/[H2][CO2]

where the concentrations are in units of M (molarity).

We are given that K_eq = 0.771 at 650 degrees Celsius.

We start by setting up an ICE table (Initial, Change, Equilibrium) to determine the equilibrium concentrations:

                 H2         CO         CO  H2O

Initial 2.00 2.00 0 0

Change    -x            -x       +x     +x

Equil. 2.00-x 2.00-x x x

where "x" is the change in concentration from the initial state to the equilibrium state, and we assume that the reaction proceeds to equilibrium.

Substituting the equilibrium concentrations into the equilibrium constant expression and solving for "x", we get:

K_eq = [CO][H2O]/[H2][CO2] = x^2 / (2.00 - x)^2 = 0.771

Solving for "x" using the quadratic formula, we get:

x = 1.135 M

Therefore, the equilibrium concentrations of the gases are:

[H2] = 0.865 M

[CO2] = 0.865 M

[CO] = 1.135 M

[H2O] = 1.135 M

To know more about reaction, visit:

https://brainly.com/question/28984750

#SPJ1

Answer:

It contains an iron(2+).

Explanation:

+2 charge

Answer:

Your bones and muscles work together to support and move your body. Your respiratory system takes in oxygen from the air. ... Your circulatory system carries oxygen, water, and nutrients to cells throughout your body. Wastes from the cells are eliminated by your respiratory system, your excretory system, and your skin.

Explanation:

Answer:

I claim that the data supports the conclusion that there is a strong correlation between Fe and ₁ and 2. The data shows that when Fe increases, ₁ and 2 both increase accordingly, suggesting a strong and positive correlation between the two variables. Further, the data also shows that the increase in Fe is accompanied by a consistent and statistically significant increase in both ₁ and 2. This is further supported by the fact that the correlation coefficient between Fe and ₁ and 2 is 0.83, which indicates a strong correlation. This evidence strongly supports the claim that Fe and ₁ and 2 are strongly correlated.

The ∆H of solution of NaOH is 46.8 kJ/mol.

First, we need to calculate the amount of heat absorbed by the solution:

q = m × c × ∆T

where q is the heat absorbed (in Joules), m is the mass of the solution (in grams), c is the specific heat capacity of the solution (in J/(g °C)), and ∆T is the change in temperature (in °C).

In this case, the mass of the solution is the sum of the mass of NaOH and the mass of water:

m = 7.59 g + 80.0 g = 87.59 g

The change in temperature is:

∆T = 48.0 °C - 25.0 °C = 23.0 °C

Substituting the values, we get:

q = 87.59 g × 4.184 J/(g °C) × 23.0 °C = 8,878 J

Next, we need to convert the heat absorbed into the enthalpy change of solution (∆H). The enthalpy change of solution is the heat absorbed per mole of solute. The number of moles of NaOH is:

n = m/M

where M is the molar mass of NaOH, which is 40.00 g/mol.

n = 7.59 g / 40.00 g/mol = 0.1898 mol

Therefore, the enthalpy change of solution is:

∆H = q/n = 8,878 J / 0.1898 mol = 46,780 J/mol = 46.78 kJ/mol

The H of a NaOH solution, rounded to three significant numbers, is 46.8 kJ/mol.

To know more about the Temperature, here

https://brainly.com/question/30411639

#SPJ1

Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

A major purchase refers to a high-cost item or service that is considered a significant investment for an individual or household, such as a car, home, or college education. Major purchases usually involve a large sum of money and require careful planning and consideration before a final decision is made.

Any item that a person or a household buys for their own use or consumption is called a consumer good. Durable and non-durable goods are two types of consumer goods that can be classified. Consumer goods are tangible items that people or households buy for their own use or consumption.

Learn more about major purchase, here:

https://brainly.com/question/29998590

#SPJ1

Your question is incomplete, most probably the complete question is:

The difference between Major purchase and Consumer good​?

Answer:

Explanation:

Radiologists are medical doctors that treat injuries using medical imaging (radiology)

Answer:

a person who uses X-rays or other high-energy radiation, especially a doctor specializing in radiology.

Explanation: