Hydrogen reacts with an element to form a compound. Which element would have the most valence electrons and also be able to react with hydrogen? oxygen chlorine neon nitrogen

Answer:

23.71J is the work that the gas do.

Explanation:

The work that a gas do under isobaric conditions follows the formula:

W = P*ΔV

Where W is work in atmL, P is the pressure and ΔV is final volume -Initial volume In Liters

Replacing with the values of the problem:

W = P*ΔV

W = 0.600atm*(0.44000L - 0.0500L)

W = 0.234atmL

In Joules (1atmL = 101.325J):

0.234atmL × (101.325J / 1 atmL) =

Answer:

pH = 4.56

Explanation:

The strychnine reacts with HCl as follows:

C₂₁H₂₂N₂O₂ + HCl ⇄ C₂₁H₂₂N₂O₂H⁺ + Cl⁻

For strychnine buffer:

pOH = 5.74 + log [C₂₁H₂₂N₂O₂H⁺] / [C₂₁H₂₂N₂O₂]

Initial moles of C₂₁H₂₂N₂O₂ are:

0.025L * (0.400 mol / L) = 0.01 moles C₂₁H₂₂N₂O₂

And of HCl are:

0.05L * (0.200 mol / L) = 0.01 moles HCl

That means after the reaction, you will have just 0.01 moles of C₂₁H₂₂N₂O₂H⁺ in 50mL + 25mL = 0.075L. And molarity is:

[C₂₁H₂₂N₂O₂H⁺] = 0.01 mol / 0.075L = 0.1333M

This conjugate acid, is in equilibrium with water as follows:

C₂₁H₂₂N₂O₂H⁺(aq) + H₂O(l) ⇄ C₂₁H₂₂N₂O₂ + H₃O⁺

Where Ka = Kw / Kb = 1x10⁻¹⁴ / 1.8x10⁻⁶ = 5.556x10⁻⁹

Ka is defined as:

Ka = 5.556x10⁻⁹ = [C₂₁H₂₂N₂O₂] [H₃O⁺] / [C₂₁H₂₂N₂O₂H⁺]

In equilibrium, concentrations are:

C₂₁H₂₂N₂O₂ = X

H₃O⁺ = X

C₂₁H₂₂N₂O₂H⁺ = 0.1333M - X

Replacing in Ka expression:

5.556x10⁻⁹ = [X] [X] / [0.1333M - X]

7.39x10⁻¹⁰ - 5.556x10⁻⁹X = X²

7.39x10⁻¹⁰ - 5.556x10⁻⁹X - X² = 0

Solving for X:

X = - 2.72x10⁻⁵M → False solution. There is no negative concentrations

X = 2.72x10⁻⁵M → Right solution.

As H₃O⁺ = X

H₃O⁺ = 2.72x10⁻⁵M

And pH = -log H₃O⁺

Explanation:

Hey, there!!

Your question is,

Magnesium + sulphuric acid = magnesium + hydrogen gas.

I.e.

[tex]mg + h2so4 = mgso4 + h2 \: [/tex]( hydrogen gas)

Here,

reactant and product have equal atoms.

so, it is alreday balanced.

They all are equal and alredy balanced.

Hope it helps...

Answer:

Mg + H2SO4 → MgSO4 + H2

Explanation:

The chemical equation shows magnesium (Mg) and sulfuric acid (H2SO4) on one side and magnesium sulfate (MgSO4) and hydrogen gas (H2) on the other.

Mg + H2SO4 → MgSO4 + H2

Answer:

c. isotope number

Explanation:

Mass Number is the sum total of mass of protons and neutrons present in the nucleus of an atom.  Generally they are being used in distinguishing isotopes. E.g Carbon - 12, Carbon - 13

Atomic Number is the number of protons. Every single element has it's unique atomic number and can be used in identification purpose. E.g Carbon - 6, Hydrogen - 1.

The correct option is option C. This is the symbol that is not necessary for the identification of a nuclide.

Answer: B, atomic number

Answer:

dark red

Explanation:

because dilute hcl is acid

dark red is the correct answer.

Answer:

Density, [tex]\rho=24.68\ g/cm^3[/tex]

Explanation:

Mass of a marble slab is 38.6 kg 38600 grams

The dimensions of the marble is 17 cm×23 cm×4 cm

We need to find its density. Mass per unit volume equals density. So,

[tex]\rho=\dfrac{m}{V}\\\\\rho=\dfrac{m}{lbh}\\\\\rho=\dfrac{38600\ g}{(17\times 23\times 4)\ cm^3}\\\\\rho=24.68\ g/cm^3[/tex]

So, the density of the marble slab is [tex]24.68\ g/cm^3[/tex]

Answer:

Distance between the carbon atom = 491 pm

Explanation:

Given:

1 pm = 1 × 10⁻¹² m

Distance between the carbon atom = 2.81 × 10⁻⁸ cm

Find:

Distance in picometers

Computation:

Distance between the carbon atom = 2.81 × 10⁻⁸ cm = 491 X 10⁻¹² m

Distance between the carbon atom = 491 pm

Answer:the volume of a water droplet in a cloud

Explanation:

Answer:

The volume of a water droplet in a cloud

Explanation:

just took the test

Answer:

DUDE YOUR ANSWER IS:

Explanation:

GIVEN BY YOU:

[H+]=(1*10^-6)

Taking negitive log on both sides we get,

-㏒[H+]=-㏒(1*10^-6)

now by power rule of exponent, and also we know that

-㏒[H+]=PH so we get

PH= -(-6)(log(10))

as we know log(10)=1 hence by putting we get

PH=6

acidic or a basic solution:

as PH<7 hence its acidic

if you like it pls comment and share it as well

so other get help of it

Answer:

[tex]\%m/m=6.85\%[/tex]

Explanation:

Hello,

In this case, we are asked to compute the by mass percent for the given 3.2 g of ethylene glycol in 43.5 g of water. In such a way, since the by mass percent is computed as follows:

[tex]\%m/m=\frac{m_{solute}}{m_{solute}+m_{solvent}} *100\%[/tex]

Whereas the solute is the ethylene glycol and the solvent the water, therefore we obtain:

[tex]\%m/m=\frac{3.2g}{3.2g+43.5g} *100\%\\\\\%m/m=6.85\%[/tex]

Best regards.

Answer:

False

Explanation:

Boron is an exception to the octet rule because it possesses less than eight electrons. Boron has five electrons with three of them being valence electrons and therefore has an incomplete octet. It readily forms compounds in which it has six valence electrons, rather than the usual eight.

Hope that helps.

Considering the exception to the octet rule, the statement is false because Boron is an exception to the octet rule and can take up to 6 electrons in its valence shell.

An exception to the octet rule is when there are too few valence electrons resulting in an incomplete octet. That is, the default exceptions imply that there can be covalently bonded atoms that surround themselves with fewer than eight electrons.

This exception occurs with boron. Boron has an incomplete octet because it only has six electrons around it. That is, boron has three valence electrons and can only form electron pair bonds in two locations, gaining stability only with 6 valence electrons.

In summary, the statement is false because Boron is an exception to the octet rule and can take up to 6 electrons in its valence shell.

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Answer:

Monomer liquid and polymer powder nail enhancement are lucrative service

Answer:

1. spontaneous

2. spontaneous

3. Not Spontaneous

4. Not Spontaneous

Palladium and Sn^4+ can be reduced by hydrogen.

Explanation:

If we look at the electrochemical systems represented above, we will notice that in the first two cells, the metal should be reduced looking at the positive electrode potential of the process. This means that hydrogen can reduce the both metals. Electrons flow from the H2(g)/H^+(aq) half cell to the metal/metal ion half cell.

Similarly, when the standard electrode potential is negative, electrons flow from the metal/metal ion electrode to the hydrogen electrode.

Based on the reaction equations, a process is spontaneous if it gives a positive E°cell hence the answers above.

Answer:

See explanation

Explanation:

The reactivity of metals has a lot to do with their position in the electrochemical series. However, it is also known that metallic character decreases across the period. This implies that as we move from left to right along the periodic table. Sodium, magnesium, aluminum and silicon continues to decrease in metallic character. As a matter of fact, silicon is a metalloid and not a pure metal.

Sodium reacts with cold water to give a vigorous reaction,magnesium and aluminium reacts with steam at red heat.

Silicon does not react with water, even as steam, under normal conditions.

Reactivity can be given as the ability of the atom to lose or gain electrons. The reactivity can be silicon is least as compared to sodium and other metals in water.

The periodic table has the arrangement of the elements in groups and periods in the table.

On moving from left to right in the periodic table, the number of electrons in the same shell increase, thereby making the loss of electrons difficult. Thus, on moving from left to right in the periodic table, the metal reactivity decreases.

Hence, silicon present in the right most of the periodic table has the lower reactivity as compared to the sodium, magnesium, and aluminum on the left side of the periodic table.

In the periodic table, on moving from top to bottom, the number of shells increases, decreasing the force of attraction to the outermost electron. Thus, the metal reactivity increases down the group.

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Answer:

no c

Explanation:

Answer:

The mass of nitrogen molecule [tex]N_2[/tex] = 45.65 g

Explanation:

The equation for the redox reaction can be represented as follows:

[tex]\mathtt{2N_2H_4 +N_2O_4 \ \to \ 3N_2 + 4H_2O}[/tex]

We know that:

numbers of moles = mass/molar mass

For [tex]\mathtt{N_2O_4}[/tex] :

number of moles = 50g/92 g/mol

number of moles = 0.5435 mol

For [tex]\mathtt{N_2H_4}[/tex] :

number of moles = 45 g/ 32 g/mol

number of moles = 1.40625 mol

From the above equation;

number of moles of [tex]\mathtt{N_2O_4}[/tex] needed = 1/2 moles of [tex]\mathtt{N_2H_4}[/tex]  = 1/2 ×  1.40625 mol

= 0.703125 mol

The amount of [tex]\mathtt{N_2O_4}[/tex] present = 0.5435 moles which is less than the needed. As such [tex]\mathtt{N_2O_4}[/tex] is the limiting reagent

The number of moles of nitrogen molecule [tex]N_2[/tex] produced = 3 × ([tex]\mathtt{N_2O_4}[/tex])

= 3 × 0.5435

= 1.6305  mol

The mass of nitrogen molecule [tex]N_2[/tex] = number of moles of  [tex]N_2[/tex]  ×  molar mass of [tex]N_2[/tex]

The mass of nitrogen molecule [tex]N_2[/tex] =  1.6305  mol × 28 g/mol

The mass of nitrogen molecule [tex]N_2[/tex] = 45.654 g

The mass of nitrogen molecule [tex]N_2[/tex] = 45.65 g

The provided question is incomplete, however, the complete question is attached with answer:

Answer:

The correct answer is : option A. Beakers A and B contain an equal number of atoms.

Explanation:

No matter what is the element or substance, in one mole of any elemnet r metal or anything have 6.022×1023 everythings. So, beaker A have one mole of iron Fe and beaker B have one mole of Lead Pb, then the total atoms in each beaker will be equal that is :

1 mole of Fe =  1× 6.022×1023 atoms/mol

1 mole of Pb = 1× 6.022×1023 atoms/mol

Thus, the correct answer is: option A. Beakers A and B contain an equal number of atoms.

Answer:I’m here for points

Explanation:yeah cuz

Answer:

Value = 1.80 g/cm³ (Approx)

Explanation:

Given:

[tex]\frac{3.39 \times 10^7g}{(\frac{4}{3} )(3.1416)(1.65 \times 10^2 cm)^3}[/tex]

Computation:

[tex]\frac{3.39 \times 10^7g}{(\frac{4}{3} )(3.1416)(1.65 \times 10^2 cm)^3} \\\\\frac{3.39 \times 10^7g}{(\frac{4}{3} )(3.1416)(4.492125 \times 10^6 cm^3)} \\\\ \frac{3.39 \times 10^7g}{(\frac{4}{3} )(3.1416)(4.492125 \times 10^6 cm^3)}\\\\ \frac{3.39 \times 10^7g}{18.8166132\times 10^6 cm^3} \\\\ 1.80159945g/cm^3[/tex]

Value = 1.80 g/cm³ (Approx)

The density has been calculated by computing the equation as [tex]\rm 1.802\;g/cm^3[/tex].

The calculation has been performed for density, as it has been performed for mass per unit volume.

The calculations can be performed as:

[tex]\rm \implies \dfrac{3.39\;\times\;10^7\;g}{\frac{4}{3}\;\times\;(3.1416)\;(1.65\;\times\;10^2)^3\;cm^3 } \\\implies \dfrac{3.39\;\times\;10^7\;g}{\frac{4}{3}\;\times\;(3.1416)\;(4.49\;\times\;10^6)\;cm^3 }\\\implies \dfrac{3.39\;\times\;10^7\;g}{\frac{4}{3}\;\times\;14.1124\;\times\;10^6\;cm^3 }\\[/tex]

The equation has been further simplified for density as:

[tex]\rm \implies \dfrac{3.39\;\times\;10^7\;g}{18.811\;\times\;10^6\;cm^3 } \\\implies 1.802\;g/cm^3[/tex]

The density has been calculated by computing the equation as [tex]\rm 1.802\;g/cm^3[/tex].

For more information about rounding units, refer to the link:

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Answer:

Odour is intensive

Explanation:

intensive properties are Independent of the amount of matter

Answer:

157.2 mL

Explanation:

The following data were obtained from the question:

Density (D) of liquid = 0.878 g/mL

Mass (m) of liquid = 138 g

Volume (V) of liquid =.?

Density of a substance is simply defined as the mass of the substance per unit volume of the substance. Mathematically, it is expressed as:

Density (D) = mass /volume

D = m/V

With the above formula, we can obtain the volume of the liquid as follow:

Density (D) of liquid = 0.878 g/mL

Mass (m) of liquid = 138 g

Volume (V) of liquid =.?

D = m/V

0.878 = 138/V

Cross multiply

0.878 × V = 138

Divide both side by 0.878

V = 138/0.878

V = 157.2 mL

Therefore, 157.2 mL of the liquid must be provided.

Answer:

A. The charge of the nuclide

B. The atomic number of the nuclide

C. The number of protons in the nuclide

Explanation:

The general nuclide symbol is in the picture.

Where X is the element you want to represent, A the mass number (That is mass of protons + mass of neutrons), Z is atomic number (Number of protons), and C is the charge of the nuclide.

Thus, you can determine from the nuclide symbol:

A. The charge of the nuclide . YES. Is C.

B. The atomic number of the nuclide . YES. Is Z.

C. The number of protons in the nuclide . YES. From the difference of A - Z.

D. The number of isotopes of that element. NO. It is not possible to determine number of isotopes of an element from a nuclide symbol.

Answer:

It loses thermal energy and the movement of particles decreases.

Explanation:

The process of a gas turning to a solid is called condensation.

Answer:

d

Explanation:

The only hypothesis that is testable using the scientific method would be that all swans are white.

The scientific method involves a series of steps through which scientists are able to arrive at a conclusion about the natural world. The steps include observation, drawing up falsifiable hypotheses from observations, testing the hypotheses using experiments, and then arriving at conclusions based on the data gathered from the experiment.

There is no way to test the mortality of all men as this will require harming humans in order to prove their mortality. The best color is also subjective as individuals have their preference when it comes to color. There is no way to prove the hypothesis that no life exists on other planets as this will require visiting other planets, a gesture that is practically impossible. That swimming is fun can also be subjective. Not everyone finds swimming interesting.

The hypothesis that all swans are white can be tested by sampling the population of swans in different areas and recording their colors objectively.

Hence, the correct option is d.

The hypothesis 'all swans are white' is testable by using the scientific method (Option d).

In conclusion, the hypothesis 'all swans are white' is testable by using the scientific method (Option d).

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Answer:

You are comparing a reaction that produces a chemical change and one that produces a physical change. What evidence could you use to determine which type of change is occurring?

If the reaction is a chemical change, new substances with different properties and identities are formed. This may be indicated by the production of an odor, a change in color or energy, or the formation of a solid.

Sample Response: If the reaction is a chemical change, new substances with different properties and identities are formed. This may be indicated by the production of an odor, a change in color or energy, or the formation of a solid.

What did you discuss in your response? Check all that apply.

the production of an odor

a change in energy

a change in color

the formation of a solid

the formation of new substances

a change in properties and identities

A chemical change may result in the following;

A Physical change may result in the following;

A chemical change leads to the formation of a new substance. This implies that the composition of the substance has being changed.

A physical change does not lead to a change in the nature of the substance. However, the appearance, shape, texture or size of the substance may change.

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Answer:

Peripheral device, also known as peripheral, computer peripheral, input-output device, or input/output device, any of various devices (including sensors) used to enter information and instructions into a computer for storage or processing and to deliver the processed data to a human operator or, in some cases.

Explanation:

Hope it helps

Answer: Input and output data

Explanation:

Plato!!!!!!!!!