Calculate the pH of HCl having a hydrogen ion concentration of 0.8M ​

The correct answer is C) Rubidium has a higher electronegativity and a lower ionization energy than sodium.

Electronegativity measures the tendency of an atom to attract the shared electron pair of a covalent bond towards itself. Rubidium has a higher electronegativity than sodium because it is more electronegative than sodium. Ionization energy measures the energy required to remove an electron from an atom. Rubidium has a lower ionization energy than sodium because it has a larger atomic radius. This larger atomic radius makes it easier to remove an electron from the atom, thus resulting in a lower ionization energy. Rubidium is an alkali metal located in the first group of the periodic table, also known as Group 1. Alkali metals are the elements in the first group that are very reactive and have one electron in their outermost shell.

To learn more about ionization energy click here https://brainly.com/question/28385102

#SPJ4

Answer:

Chemical Energy is stored in food molecules

Answer:

chemical energy

Explanation:

because none of the other make sense

Answer:

approximately 137.3 grams of P2O3 will form if one uses 78 grams of oxygen.

Explanation:

Diphosphorus trioxide, P2O3, is formed from the reaction of phosphorus with oxygen:

P4 + 5O2 -> 2P2O3

To determine how many grams of P2O3 will form from 78 grams of oxygen, we need to know how much phosphorus is also involved in the reaction. If we assume that there is enough phosphorus present, then we can calculate the amount of P2O3 that will be produced.

The balanced equation tells us that for every 2 moles of P2O3 that are produced, 4 moles of P4 and 5 moles of O2 are consumed. From the number of moles of O2, we can calculate the number of moles of P2O3 produced using the ratio from the balanced equation:

78 g O2 / (32 g/mol O2) = 2.43 mol O2

2.43 mol O2 * (2 mol P2O3 / 5 mol O2) = 0.972 mol P2O3

Finally, we can convert the number of moles of P2O3 to grams:

0.972 mol P2O3 * (141.94 g/mol P2O3) = 137.3 g P2O3

So, approximately 137.3 grams of P2O3 will form if one uses 78 grams of oxygen.

The unknown gas : N₂

Given

Volume : 23.1 L

Mass : 28.85 g

Required

The identity of the unknown gas

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol

So mol for The unknown gas :

= 23.1 L : 22.4 L

= 1.0313

The molar mass of unknown gas :

= mass : mol

= 28.85 g : 1.0313

= 27.974 g/mol≈ 28 g/mol

23.1 L of nitrogen has a mass of 28.85 g at STP.

An unknown gas occupies 23.1 L at STP. We will calculate the moles of the gas, considering that 1 mole of an ideal gas occupies 22.4 L at STP.

\(23.1 L \times \frac{1mol}{22.4L} = 1.03 mol\)

1.03 moles of the unknown gas have a mass of 28.85 g. The molar mass of the gas is:

\(M = \frac{28.85 g}{1.03 mol} = 28.0 g/mol\)

A gas with a molar mass of 28.0 g/mol is likely to be nitrogen gas.

23.1 L of nitrogen has a mass of 28.85 g at STP.

Learn more: https://brainly.com/question/4172228

Explanation:

Only protons and electrons contribute to the charge of an atom ...NEUTRons are NEUTRal...

Protons are    + charge  

Electrons are  - charge

21 negative charges added to 17 positive charges results in

   - 4  charge

Answer:

376.56 g/mol.

Explanation:

The molar mass of bromine is approx. 79.904 g/mol. 79.904 x 4 = 319.616 g/mol. The molar mass of Fluorine is approx. 18.998 g/mol. 18.998 x 3 =  56.994 g/mol. 56.994 amu + 319.616 amu = 376.56 g/mol.

Answer:

\(\boxed {\boxed {\sf 376.594 \ g/mol}}\)

Explanation:

We are asked to find the molar mass of tetrabromine trifluoride. This compound has the formula Br₄F₃.

The molar mass is the mass of 1 mole of a substance. The values are found on the Periodic Table because they are equal to the atomic masses, but the units are grams per mole instead of atomic mass units.

Look up the molar masses of the individual elements in the compound: bromine and fluorine.

Look at the subscripts in the formula. There is a subscript of 4 after Br and one of 3 after F. This means one mole of the compound contains 4 moles of bromine and 3 moles of fluorine.

Multiply the molar masses by their respective subscript, then add the results.

The molar mass of Br₄F₃ is 376.594 grams per mole.

Answer:A

Explanation:

Answer:

Please see the attachments

Explanation:

Please see the attachments below structures of the 3 isomers of C8H18 that contain 3 methyl branches on the main chain, 2 of which are on the same carbon.

Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

The total amount of heat generated is 207.5 J, under the condition that the given sample possess 64.2-g sample of this substance with a specific heat of 50.6 J/(kg•°C).

The heat needed to change the temperature of a substance can be evaluated applying the given formula

q = m × c × ΔT

Here

q = energy added,

m = mass of the substance,

c = specific heat capacity of the substance

ΔT = change in temperature.

Then we can proceed by calculating the heat required to change its temperature from 180.0 °C to 244.0 °C by converting the mass of the substance from grams to kilograms

m = 64.2 g = 0.0642 kg

Then, we can evaluate the change in temperature

ΔT = (244.0 °C - 180.0 °C)

= 64.0 °C

Lastly, we can apply the formula above to evaluate the heat required

q = m × c × ΔT

= (0.0642 kg) × (50.6 J/(kg•°C)) × (64.0 °C)

= 207.5 J

Hence, 207.5 J of heat is required to change the temperature of this substance from 180.0 °C to 244.0 °C.

To learn more about specific heat capacity

https://brainly.com/question/27991746

#SPJ1

The minimum entropy change of the heat-supplying source is -0.87 kJ/K.

In this case, given the initial conditions, we first use the 10-% quality to compute the initial entropy.

S₁ = 1.485  +  (0.1)(5.6865) = 2.0537 kJ/kg K

The entropy at the final state given the new 40-% quality:

S₂ = 1.4337  +  (0.4)(5.7894) = 3.7495 kJ/kg K

m₁ = 0.026/(0.001057   +  0.1 x 1.002643) = 0.257 kg

m₂ = 0.026/(0.001053   +  0.4 x 1.158347)  = 0.056 kg

ΔS + S₁  - S₂  + S₂m₂  - S₁m₁  -  sfg(m₂  -  m₁)  > 0

ΔS + 2.0537 -  3.7495 + (3.7495 x 0.056)  -   (2.0537 x 0.257)  - 5.6865( 0.056 - 0.257)  >  0

ΔS > -0.87 kJ/K

Thus, the minimum entropy change of the heat-supplying source is -0.87 kJ/K.

Learn more about entropy here: brainly.com/question/6364271

#SPJ1

Answer:

the would test random expirements

Answer:

D.

Explanation:

\(\implies\) The correct answer is (B) 0.00037

\(\bf{ \underline{Step \: 1)} :3.7 × 10^{-4 }we \: can \: write \: as \:37 × 10^{-5}}\)

\(\bf{ \underline{Step \: 2)} :37 × 10^{-5 } \: we \: can \: write \: as \: 37 × \frac{1}{10^5}}\)

\(\bf{ \underline{Step \: 3)} :37 × \frac{1}{10^5}\: we \: can \: write \: as \: (37 × \frac{1}{(10)(10)(10)(10)(10)}})\)

\(\bf{ \underline{Step \: 4)} :37 × \frac{1}{(10)(10)(10)(10)(10)} we \: can \: write \: as \: ( 37 × \frac{1}{100000}})\)

\(\bf{ \underline{Step \: 5)} :37 × \frac{1}{100000} \: we \: can \: write \: as \: \frac{37}{100000}}\)

\(\bf{ \underline{Step \: 6)} :\frac{37}{100000} \: we \: can \: write \: as \: 0.000037}\)

Answer: 23.8

Explanation:

191 Types of Chemical Reactions Do atoms rearrange in predictable patterns during ... When two ratios are set equal, this is called a proportion and the whole ... A sample of gas occupies a volume of 450.0 mL at 740 mm Hg and 16°C. ... at 25° C = 23.8 torr) P 736.2 torr 740 torr P 760.0 torr - 23.8 torr P P -P gas

If a fixed amount of gas occupies 450.0mL at -10.0 C and 191 Torr, the volume of the same gas be at 25.0 C and 1142 Torr is 85.27ml.

The combined gas law is the law of of gaseous state which is made by combination of Boyle's law, Charle's law, Avogadro's law and Gay Lussac's law.

It is a mathematical expression that relates Pressure, Volume and Temperature.

(P1 × V1)÷T1 = (P2 × V2)÷T2

Given,

V1 = 450.0mL

T1 =  -10.0 C

P1 = 191 Torr

T2 = 25.0 C and

P2 = 1142 Torr

V2 = ?

(P1 × V1)÷T1 = (P2 × V2)÷T2

Putting all the values, we get

V2 = 85.27ml

Therefore, If a fixed amount of gas occupies 450.0mL at -10.0 C and 191 Torr, the volume of the same gas be at 25.0 C and 1142 Torr is 85.27ml.

Learn more about combined gas law, here:

https://brainly.com/question/29419201

#SPJ3

The minimum volume of 4.00 M KOH required for the reaction to go to completion is 10.94 mL.

The first step is to determine the moles of aluminum foil used in the reaction. We can use the molar mass of aluminum to convert the given mass to moles:

1.1798 g Al / (26.98 g/mol Al) = 0.04375 mol Al

According to the balanced chemical equation, the reaction requires 2 moles of KOH for every mole of Al. Therefore, we need:

0.04375 mol Al x (2 mol KOH / 2 mol Al) = 0.04375 mol KOH

To calculate the minimum volume of 4.00 M KOH required, we can use the equation:

Molarity x Volume = Moles

Rearranging for volume, we get:

Volume = Moles / Molarity

Plugging in the values, we get:

Volume = 0.04375 mol KOH / 4.00 M = 0.01094 L = 10.94 mL

As a result, the minimum volume of 4.00 M KOH required to complete the reaction is 10.94 mL.

To know more about the Reaction, here

https://brainly.com/question/24817361

#SPJ4

By the concept of calculating moles ,it can br concluded that the no. of atoms of phosphorus in 8.80mol of copper(II) phosphate is=1.06\(x10^{25}\)

A mole is defined as amount of substance containing as many as elementary entities that are there in atoms of exactly 12 g of carbon-12.Therefore we can say,1 mole of copper(II) phosphate, Cu3(PO4)2, contains three moles of copper(II) cations and two moles of phosphate anions.

Again 1mole of phosphate anions contains one mole of phosphorus and four moles of oxygen.Considering all these informations we can conclude that:1 mole of copper(II) phosphate contains 2 moles of Phosphorus

Accordingle the sample contains=(8.80\(x\)2) moles of Phosphorus

                                    =(17.6\(x\)Avogadro's constant) atoms of  Phosphorus

                                    =(17.6\(x\)6.022\(x\)\(10^{23}\)) atoms of  Phosphorus

                                    =1.06\(x10^{25}\) [approx] no. of Phosphorus atoms

to learn more about Moles,

https://brainly.com/question/30892840

In 8.80 moles of copper(II) phosphate, there are approximately 1.06 x 10²⁵ atoms of phosphorus.

The number of atoms of phosphorus in a given amount of a compound can be calculated using the concept of mole in chemistry. Copper(II) phosphate is Cu3(PO4)2, containing 2 moles of phosphorus (P) for every 1 mole of the compound. Avogadro's number (6.022 x 10²³) gives the number of atoms in one mole.

So, if there are 8.80 moles of copper(II) phosphate, there would be 2 × 8.80 moles of phosphorus. Multiplying this by Avogadro's number gives the total number of phosphorus atoms.

Therefore, the number of phosphorus atoms is 2 × 8.80 × 6.022 x 10²³ = 1.06 x 10²⁵ atoms of phosphorus.

https://brainly.com/question/32787463

#SPJ2

Answer:

Strong Acid

Explanation:

Hope this helps! :)

LDA is a Base which will abstracts alpha acidic proton to carbonyl carbon.

What is  Alpha Acidic Proton?

When a proton source is present, the result can either transform back into the initial ketone or aldehyde or generate a brand-new substance called an enol. "Keto-enol tautomerism" refers to the equilibrium reaction between the ketone or aldehyde and the enol form. In this reaction, the ketone or aldehyde is often significantly preferred.

The carbon and oxygen both have unhybridized p orbitals that can overlap to create the C=O bond since carbonyl groups are sp2 hybridised.

Hydrogens on carbons next to carbonyls have unique features because of the existence of these overlapping p orbitals. Because the conjugate base, an enolate, is stabilised by conjugation with the orbitals of the carbonyl, in particular, hydrogens are weakly acidic.

Learn more about Alpha Acidic Proton from given link

https://brainly.com/question/14287631

#SPJ4

The symbol l represents the substance is in the liquid state. The correct option is B.

The symbol (l) in a chemical equation indicates that the substance is in the liquid state.

This is important to know because the physical state of a substance can affect its properties and how it behaves in a chemical reaction.

For example, a liquid may have a different density or viscosity than a solid or gas, and this can impact how quickly it reacts with other substances or how it mixes with other liquids.

Therefore, including the (l) symbol in a chemical equation can provide important information about the state of the substances involved. The correct option is B.

For more details regarding chemical reaction, visit:

https://brainly.com/question/29762834

#SPJ1

21.6 g/mol  is the molar mass of this compound.

p=175 Torr

v= 1

r=0.82

t= 125 °C= 398 K

density= mass/volume

mass=density × 1

mass=1.14 g/L ×1

mass=1.14 g

PV=nRT

n=PV/RT

n=175×1÷0.82×398

n=0.53 mol

moles= given mass/molar mass

molar mass= given mass/moles

molar mass=1.14 /0.53

molar mass=21.6

Mass per mole is a definition of molar mass. In other terms, molar mass is the total mass of all the atoms in a substance that makes up a mole. It is measured in gram-per-mole units.

For elements or molecules, molar mass is displayed. The molar mass is simply the element's mass represented in atomic mass units in the case of single elements or individual atoms. To put it another way, an atom's atomic mass and molar mass are exactly equal. Molar mass can be used to determine a particle's identification because it is equivalent to atomic mass for individual atoms.

To know more about molar mass visit : https://brainly.com/question/13128557

#SPJ9

Answer:

a. H and P

Explanation:

A covalent bond is formed between 2 nonmetals, which share pairs of electrons to complete the octet in their valence shells. The polarity of the bond depends on the difference in electronegativity between both atoms. If ΔEN = 0, the bond is nonpolar. If ΔEN > 0, the bond is polar.

Which of the following set of atoms has a nonpolar covalent bond?

a. H and P . YES. H and P are nonmetals and ΔEN = |EN(H)-EN(P)|=|2.1-2.1|=0.

b. N and C . NO. ΔEN = |EN(N)-EN(C)|=|3.0-2.5|=0.5.

c. Li and O. NO. Li is a metal and O is a nonmetal.

d. Cl and Ca. Ca is a metal and Cl is a nonmetal.

Answer:

b, c, e

Explanation:

Inorganic compounds usually lack carbon.

Inorganic compounds are not associated with or made from living things.

Inorganic compounds include salt and water​.

Answer:

yes the answer id bce

Explanation:

Sodium combines with oxygen to form sodium oxide and sodium combines with Carbon-di-oxide to form sodium carbonate.

When sodium and oxygen combine, they form sodium oxide. The reaction is:

2Na + O₂ → 2Na₂O

Sodium and oxygen combine to form sodium oxide, a white solid with a melting point of 1,132 degrees Celsius. Sodium oxide is a strong base, meaning it can accept protons from other molecules. It is also a very strong oxidizing agent, meaning it can donate electrons to other molecules.

Similarly, Sodium carbonate is formed when sodium and carbon dioxide combine. This reaction is used to make baking soda.

When sodium and carbon dioxide combine, they form sodium carbonate. The reaction is as follows:

2Na + CO₂ -------> Na₂CO₃

To know more about a simple chemical reactions, click below:

https://brainly.com/question/11231920

#SPJ1

The structure of  the alkyne 4 - decyne is shown in the image attached.

Alkyne functional group compounds with a triple bond made of carbon and carbon contain 4-decyne (C). The triple bond is found at the fourth carbon position in the ten-carbon chain (decyne) of 4-decyne.

Nine hydrogen atoms (H) are joined to the first nine carbon atoms (C), starting from the left side.

In conclusion, 4-decyne is made up of a chain of ten carbon atoms, with the fourth carbon atom serving as the center of a carbon-carbon triple bond (C). Except for the carbon involved in the triple bond, all carbon atoms are connected to hydrogen atoms.

Learn more about chemical structure:https://brainly.com/question/32300619

#SPJ1