If the H+ in a solution is 1x10^-1 mol/L what is the OH-

Answers

Answer 1

the concentration of [tex]\( \text{OH}^- \)[/tex] ions in the solution is [tex]\( 1.0 \times 10^{-3} \, \text{mol/L} \)[/tex].

To find the concentration of [tex]\( \text{OH}^- \)[/tex] ions [tex](\( [\text{OH}^-] \))[/tex] in a solution given the concentration of [tex]\( \text{H}^+ \)[/tex] ions [tex](\( [H^+] \))[/tex], we can use the fact that in water at [tex]\( 25^\circ \text{C} \)[/tex] [tex](\( 298 \text{K} \))[/tex], the product of [tex]\( [\text{H}^+] \)[/tex] and [tex]\( [\text{OH}^-] \)[/tex] is constant and equal to [tex]\( 1.0 \times 10^{-14} \, \text{mol/L} \)[/tex]. This is known as the ion product of water [tex](\( K_w \)).[/tex]

[tex]\[ K_w = [\text{H}^+] \times [\text{OH}^-] \][/tex]

Given [tex]\( [\text{H}^+] = 1 \times 10^{-1} \, \text{mol/L} \)[/tex], we can rearrange the equation to solve for [tex]\( [\text{OH}^-] \)[/tex]:

[tex]\[ [\text{OH}^-] = \frac{K_w}{[\text{H}^+]} \][/tex]

Substitute the given values:

[tex]\[ [\text{OH}^-] = \frac{1.0 \times 10^{-14} \, \text{mol/L}}{1 \times 10^{-1} \, \text{mol/L}} \][/tex]

[tex]\[ [\text{OH}^-] = 1.0 \times 10^{-14} \, \text{mol/L} \times \frac{1}{1 \times 10^{-1}} \, \text{mol/L} \][/tex]

[tex]\[ [\text{OH}^-] = 1.0 \times 10^{-14} \times 10^{1} \, \text{mol/L} \][/tex]

[tex]\[ [\text{OH}^-] = 1.0 \times 10^{-3} \, \text{mol/L} \][/tex]

Therefore, the concentration of [tex]\( \text{OH}^- \)[/tex] ions in the solution is [tex]\( 1.0 \times 10^{-3} \, \text{mol/L} \)[/tex].


Related Questions

Identify two cost effective ways society can use to prevent further destruction of the ozone layer. Explain your answer.

Answers

limit private vehicle driving stop driving in the car so much Walt some ride a bike skate stuff like that because all that pollution is deadly to the ozone layer. if you're picking up the kids from school try carpooling. second try Echo friendly household cleaning products natural cleaning products a lot of the products contain toxic chemicals a lot of places now or selling products that are toxic free made out of natural ingredients. don't use pesticides use natural remedies. also they need to ban the use of dangerous nitrous oxide

Nitrogen is available to plants mostly in the form of _____. nitrogen in the atmosphere nitrite ions in the soil uric acid from animal excretions nucleic acids from decomposing plants and animals nitrate and ammonium ions in the soil

Answers

Nitrogen is available to plants mostly in the form of Nitrate and ammonium ions in the soil. Plants absorb ammonium and nitrate during the assimilation process, which are then converted into nitrogen containing organic molecules, such as amino acids, and DNA. Animals are not able to absorb nitrates directly but receive their nutrient supplies by consuming plants or plant consuming animals.

Plants primarily obtain nitrogen from soil in the forms of nitrates (NO₃⁻) and ammonium ions (NH₄), which become available through the processes of nitrogen fixation and nitrification by certain bacteria.

Nitrogen is available to plants mostly in the form of nitrate and ammonium ions in the soil. Atmospheric nitrogen, which composes 78% of the air, is not directly usable by plants due to its strong triple bonds. Through the nitrogen cycle, nitrogen is converted into biologically available forms.

One such process is nitrogen fixation, where free-living or symbiotic bacteria, such as Rhizobium in legume roots, convert gaseous nitrogen (N₂) into ammonia (NH₃). This ammonia can become ammonium (NH₄) and is then available for plant uptake, or it can be further processed by nitrifying bacteria into nitrites (NO₂⁻) and subsequently into nitrates (NO₃⁻), which are absorbed by plant roots.

The availability of ammonia and nitrates in the soil is crucial for plants to synthesize essential compounds like proteins and nucleic acids, making nitrogen a limiting nutrient for plant growth.

Why are hydrogen molecules called elements but water molecules are called compounds?

Answers

Hydrogen molecules are made up of only one element (hydrogen).

Water molecules, H₂O, are compounds because they are made up of more than one element, hydrogen and oxygen.

During _____, bonds between monomers are broken by adding water.


A.
hydrolysis


B.
polymerization


C.
dehydration synthesis


D.
carbohydrate loading

Answers

During _A.   hydrolysis, bonds between monomers are broken by adding water.
Prefix "hydro-" means water.
"-lysis" - disintegration.

Suppose you wanted to find out how many milliliters of 1.0 m agno3 are needed to provide 169.9 g of pure agno3? what is step 1 in solving the problem? calculate moles agno3 needed what is the molar mass of agno3? 169.87 g/mol how many milliliters of solution are needed?

Answers

m(AgNO₃) = 169.9 g; mass.
n(AgNO₃) = m(AgNO₃) ÷ M(AgNO₃).
n(AgNO₃) = 169.9 g ÷ 169.87 g/mol.
n(AgNO₃) = 1 mol; amount of silver nitrate.
c(AgNO₃) = 1 M = 1 mol/L.
V(AgNO₃) = n(AgNO₃) ÷ c(AgNO₃).
V(AgNO₃) = 1 mol ÷ 1 mol/L.
V(AgNO₃) = 1 L.
V(AgNO₃) = 1 L · 1000 mL/L.
V(AgNO₃) = 1000 mL; volume of silver nitrate.


You need 1000 milliliters of a 1.0 M AgNO3 solution to provide 169.9 g of pure AgNO₃.

Step 1: Calculate the moles of AgNO₃ needed. To do this, use the given molar mass of AgNO₃, which is 169.87 g/mol.

Moles = mass / molar mass

Moles of AgNO₃ = 169.9 g / 169.87 g/mol = 1.000 mol

Step 2: Determine the volume of the 1.0 M AgNO₃ solution required to obtain 1.000 mol of AgNO₃.

Molarity (M) = moles of solute / liters of solution

Rearranging the formula to solve for volume (liters):

Volume (L) = moles of solute / Molarity

Volume (L) = 1.000 mol / 1.0 M = 1.000 liters

Since the question asks for the volume in milliliters:

Volume (mL) = Volume (L) * 1000

Volume (mL) = 1.000 L * 1000 = 1000 mL

Therefore, you need 1000 milliliters of a 1.0 M AgNO₃ solution to provide 169.9 g of pure AgNO₃.

You have two containers of equal volume. one is full of helium gas. the other holds an equal mass of nitrogen gas both gases have the same pressure how does thegas. bothgaseshavethesamepressure. howdoesthetemperature of the helium compare to the temperature of the nitrogen?

Answers

Let's assume that both He and N₂ have ideal gas behavior.

Then we can use ideal gas law,
     PV = nRT
Where, P is the pressure of gas, V is the volume, n is moles of gas, R is universal gas constant and T is the temperature in Kelvin.

The P and V are same for the both gases.
R is a constant.

The only variables are n and T.

Let's say temperature of He is T and temperature of N is T.

n = m/M where n is moles, m is mass and M is molar mass.

Molar mass of He is 4 g/mol and molar mass of N₂ is 28 g/mol

Since mass (m) of both gases are same,
 moles of He = m/4
 moles of N₂ = m/28

Let's apply the ideal gas equation for both gases.
For He gas,
 PV = (m/4)RT₁              (1)

For N gas,
 PV = (m/28)RT₂            (2)

(1) = (2)
(m/4)RT₁ = (m/28)RT₂ 
        T₁/4 = T₂/28
        T₁    = T₂/7
        7T  = T

Hence, the temperature of N gas is higher by 7 times than the temperature of He gas.

Final answer:

Given the same mass and pressure, the temperature of the helium would be the same as the temperature of nitrogen. This is due to the ideal gas law, which connects the variables of pressure, volume, temperature, and the number of moles of a gas.

Explanation:

The temperature of the helium would be the same as the temperature of nitrogen, given that the quantities (in terms of mass) are the same and they are at the same pressure. This follows from the ideal gas law which states that pressure is directly proportional to temperature and the number of moles of the gas, and inversely proportional to volume. Considering this in context, helium and nitrogen have different molar masses. For a given mass, there will be more moles of helium (which has a lower molar mass) than of nitrogen (which has a higher molar mass). Therefore, if the mass, volume, and pressure are held constant, the temperature for equal masses of the two gases will also be constant. More moles of gas does not mean a higher temperature, contrary to what one might intuitively think.

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One difference between strong bases and weak bases is 1. strong bases can neutralize more acid than weak bases. 2. strong bases release more hydroxide ions than weak bases. 3. only strong bases can be amphiprotic. 4. weak bases dissociate completely; strong bases do not. 5. strong bases dissociate completely; weak bases do not.

Answers

One difference between strong bases and weak bases is that a strong bases dissociate completely while weak bases do not. A strong base is a compound that completely ionizes into metal and hydroxide ions when in a solution, on the other hand weak bases only partially ionizes to metal and hydroxide ions in solution. An example of a weak base is ammonia and an example of a strong base is sodium hydroxide.

A polar covalent bond will form between which two atoms?
a. beryllium and fluorine (group 1 and group 7)
b. hydrogen and chlorine (group 7)
c. sodium and oxygen (group 1 and group 6)
d. fluorine and fluorine (group 7)

Answers

Types of Bonds can be predicted by calculating the difference in electronegativity.

If, Electronegativity difference is,

 

                Less than 0.4 then it is Non Polar Covalent

                

                Between 0.4 and 1.7 then it is Polar Covalent 

            

                Greater than 1.7 then it is Ionic

 

For Be and F,

                    E.N of Fluorine          =   3.98

                    E.N of Beryllium        =   1.57

                                                   ________

                    E.N Difference                2.41          (Ionic Bond)


For H and Cl,

                    E.N of Chorine           =   3.16

                    E.N of Hydrogen        =   2.20

                                                   ________

                    E.N Difference                0.96          (Polar Covalent Bond)


For Na and O,

                    E.N of Oxygen          =   3.44

                    E.N of Sodium          =   0.93

                                                       ________

                    E.N Difference                2.51          (Ionic Bond)


For F and F,

                    E.N of Fluorine          =   3.98

                    E.N of Fluorine          =   3.98

                                                        ________

                    E.N Difference                0.00         (Non-Polar Covalent Bond)

Result:

           A polar covalent bond is formed between Hydrogen and Chlorine atoms.

An atom of which element has the strongest attraction for the electrons in a bond?
a.aluminum
b.carbon

Answers

Carbon generally has a higher electronegativity than aluminum, so a carbon atom has a stronger attraction for bonding electrons.

The strength of an atom's attraction for the electrons in a bond is measured by its electronegativity. Among the elements listed, carbon generally has a higher electronegativity than aluminum, which means that an atom of carbon will typically have a stronger attraction for the electrons in a bond. The concept of electronegativity is crucial in understanding the behavior of atoms in different chemical compounds and their ability to attract bonding electrons.

Blank c2h4 + blank o2 → blank co2 + blank h2o how many moles of o2 are in the chemical equation when balanced using the lowest whole numbers

Answers

The reaction is
C₂H₄ + O₂ → CO₂ + H₂O

To balance the equation, both side have same number of elements. Here,

In left hand side has                                            in right hand side has

           4 H atoms                                                       2 H atoms 

           2 C atoms                                                       1 C atom 

           2 O atoms                                                       3 O atoms 

First, we have to balance number of C atoms and number of H atoms in both side.  
To balance C atoms, '2' should be added before CO₂ and to balance H atoms, '2' should be added before H₂O. 
Then number of oxygen atoms is 2 x 2 + 2 = 6 in right hand side. So, 3 should be added before O₂ in left hand side.
After balancing the equation should be,

C₂H₄ + 3O₂ → 2CO₂ + 2H₂O


When a 30.98-g sample of phosphorus reacts with oxygen, a 71.00-g sample of phosphorus oxide is formed. What is the percent composition of the compound? What is the empirical formula for this compound?

Answers

Answer:- P = 43.63% and O = 56.37% and the empirical formula is [tex]P_2O_5[/tex]

Solution:- mass of Phosphorous = 30.98 g

mass of product(phosphorous oxide) = 71.00 g

mass of oxygen = 71.00 - 30.98 = 40.02 g

percentage of phosphorous in the compound = (30.98/71.00)100 = 43.63%

percentage of oxygen in the compound = (40.02/71.00)100 = 56.37%

moles of P = 30.98 g x ( 1mol/30.97 g) = 1.00 mol

moles of O = 40.02 g x (1 mol/ 16.00 g) = 2.50 mol

Ratio of moles of P to O is 1.00:2.50

The whole number ratio is 2:5

So, the empirical formula of the phosphorous oxide formed is [tex]P_2O_5[/tex]

Answer : The percent composition of P = 43.63 % and O = 53.37 % .

Empirical formula of Phosphorous oxide = P₂O₅

Part A : Percent composition :

It is percent of each element present in compound . It is given by formula :

[tex] Percent composition = \frac{mass of element}{ total mass of compound } * 100 [/tex]

Given : Mass of Phosphorous (P ) = 30.98 g

Mass of Compound Phosphorous oxide = 71.00 g

Mass of Oxygen (O) = mass of compound - mass of P

= 71.00 g - 30.98 g = 40.02 g

[tex] Percent composition of P = \frac{mass of P }{ mass of compound} [/tex][tex] = \frac{30.98 g }{71.00 g} * 100 [/tex]

Percent composition of P = 43.63 %

[tex] Percent composition of O = \frac{mass of Al}{Mass of compound } * 100
= \frac{40.02 g }{71.00 g} * 100 [/tex]

Percent composition of O = 53.37 %

Part B : Empirical formula of Phosphorous Oxide.

Empirical formula is formula which shows the proportion of element present in a compound . Following are the steps to calculate empirical formula of an compound :

Step 1 : Find masses of each element .

Mass of P = 30.98 g

Mass of O = 40.02 g

Step 2 : Conversion of masses of element to its mole .

[tex] Mole = \frac{mass }{molar mass } [/tex]

Given : Mass of P = 30.98 g [tex] Molar mass of P = 30.97 \frac{g}{ mol} [/tex]

[tex] Mole of P = \frac{30.98 g }{30.97\frac{g}{mol} } = 1 mol [/tex]

Given: Mass of O = 40.02 g [tex] Molar mass of O = 15.99\frac{g}{mol} [/tex]

[tex] Mole of O = \frac{40.02 g}{15.99\frac{g}{mol}} = 2.5 mol [/tex]

Step 3 : Finding Ratio of mole .

In this step ratio is found by dividing each mole by smallest mole .Since mole of P is smaller , so this will be used for division.

[tex] Ratio of mole of P= \frac{mole of P }{mole of P } = \frac{1 mol}{1 mol} = 1 [/tex]

[tex] Ratio of mole of O = \frac{ mole of O }{mole of P } = \frac{2.5 }{1 } = 2.5 [/tex]

Hence , Ratio of P : O = 1 : 2.5

Since the ratio is in fraction , it need to be converted to whole number . So we multiply the ratio by such a minimum number which gives us a whole number ratio. This step is skipped if the ratio already comes in whole number.

On multiplication the ratio by 2 :

Ratio of P : O = ( 1 : 2.5 ) * 2 = 1 * 2 : 2.5 * 2

Ratio of P : O = 2 : 5

Step 4 : Writing the empirical formula

The ratio of P and O is 2: 5 , which gives the empirical formula of compound as P₂O₅ .

What is the periodic trend in atomic size and electronegativity as you move from left to right on the?

Answers

As you move from left to right on the periodic table, atomic size and electronegativity increase.

(Ionization energy increases from left to right on the periodic table, and electronegativity relates to ionization energy in that the higher the ionization energy, the higher the electronegativity.)

(Atomic radius increases from left to right on the periodic table due to the fact that electrons are gradually being added from left to right, meaning the amount of protons in the nucleus are increasing in order to keep the atom neutral, therefore atomic size/radius increases.)

Dalton theorized that matter is made of tiny, indivisible particles called atoms. In what way did the theories of each
of these scientists support or differ from Dalton's theory? K/U
(a) J. J. Thomson
(b) Ernest Rutherford
(c) James Chadwick

Answers

Final answer:

J. J. Thomson discovered electrons, Ernest Rutherford found protons, and James Chadwick discovered neutrons, all of which conflicted with Dalton's theory of indivisible atoms.

Explanation:

Dalton's Atomic Theory stated that matter is made up of indivisible particles called atoms. However, subsequent scientists' discoveries supported or differed from Dalton's theory in the following ways:

J. J. Thomson discovered the existence of negatively charged particles called electrons, which Dalton's theory did not account for.Ernest Rutherford proposed that electrons orbit a positive nucleus and discovered the presence of positively charged particles called protons in the nucleus. This also conflicted with Dalton's belief in indivisible atoms.James Chadwick further expanded atomic theory by discovering the existence of neutral particles called neutrons, which Dalton had no knowledge of.

What was the action between the 2 atoms in an ionically bonded compound that caused that ionic bond to form in the first place? mutual electrons interlocked attraction between electron cloud of one atom and nucleus of the other opposite ions attracted each other sharing of outer shell electrons

Answers

Answer:
            Opposite ions attraction between the 2 atoms in an ionically bonded compound causes the ionic bond to form in the first place.

Explanation:
                   Ionic bond is the electrostatic forces of attraction between positively charged cations and negatively charged Anions. These forces are very stronger resulting in increasing several physical properties of Ionic compounds like melting point and boiling point e.t.c.

Example:

Sodium Chloride:
                           NaCl is formed by Na⁺ cation and Cl⁻ anion as follow,

Oxidation of Na;

                                      2 Na  →  2 Na⁺  +  2 e⁻

Reduction of Cl₂;

                                    Cl₂  +  2 e⁻  →  2 Cl⁻

Crystal Lattice formation is as follow,

                                  Na⁺  +  Cl⁻   →  NaCl

Answer:

opposite ions attract

Josh is studying pH calculations and tests a basic solution with a pH meter. He finds that the solution has a pH equal to 9.2. What is the pOH of the solution? A) 2.5 B) 4.8 C) 9.6 D) 10.2

Answers

pOH is a measurement of the hydroxide concentration of a solution, and is calculated by 14 - pH. Therefore, your answer is B, 4.8.

Which activity most likely involves the direct use of saturated hydrocarbons?

Answers

Saturated hydrocarbons, such as alkanes, are utilized in combustion processes for producing heat due to their single carbon-to-carbon bonds.

Saturated hydrocarbons, also known as alkanes, involve the direct use of hydrocarbons with only single carbon-to-carbon bonds. An example of an activity that most likely involves the direct use of saturated hydrocarbons is combustion processes for producing heat. These hydrocarbons are composed entirely of single bonds and are saturated with hydrogen.

When the ph of the extracellular fluid declines, the kidneys?

Answers

The answer is the kidneys reabsorb more potassium ions.   When the ph of the extracellular fluid declines, the kidneys reabsorb more potassium ions.  

The concentration of the stock solution she needs is 100 milli molar (mm) and she needs to make 1.2 milli liters (ml) solution of the drug-a. the drug is available in a salt form with a molecular weight of 181.6 grams / mole. what is the amount (quantity in grams) of drug-a will she have to weigh-out in order to make the stock solution

Answers

molarity is defined as the number of moles of solute in 1 L of solution 
molarity of stock solution to be prepared - 100 x 10⁻³ mol/L
volume of stock solution to be prepared - 1.2 mL 
Therefore number of moles in 1.2 mL - 100 x 10⁻³ mol/L x 1.2 x 10⁻³ L 
number of moles of drug - 1.2 x 10⁻⁴ mol 
mass of drug required - 1.2 x 10⁻⁴ mol x 181.6 g/mol = 21. 8 mg
21.8 g of drug is required to make the stock solution

The molality of a solution containing 8.1 moles of solute in 4847 g of solvent is ____.

Answers

molality is defined as the number of moles of solute in 1 kg of solvent 
the number of moles of solute - 8.1 mol
mass of solvent - 4847 g
there are 8.1 mol in 4847 g of solvent 
we need to know how many moles are in 1 kg of solvent
therefore number of moles in 1 kg of solvent is - 8.1 mol / 4.847 kg 
molality of solution is - 1.67 mol/kg 

Answer:

1.67m

Explanation:

Which chemical bonds, also known as end bonds, join amino acids together, end to end in long chains, to form a polypetide chain?

Answers

 peptide bond, also known as an amide bond, is a covalent chemical bond linking two consecutive amino acid monomers along a peptide or protein chain

https://en.wikipedia.org/wiki/Peptide_bond

if hydrogen temperature goes from 50 tp 75 degrees Celsius in 22g sample, how much heat was used? Give explanation!
A.15,730 J
B.23,595 J
C.7865 J
D.550 J

Answers

The heat used if the  hydrogen temperature  goes from 50 to 75 c is calculated using 

Q(heat) = M(mass) xC( specific heat capacity for  hydrogen) x deltaT (change in temperature)  formula
 Q=?
m =22g
c= 14.3 j/g/c
delta T = 75-50 = 25c

Q = 22 g  x 14.3 j/g/c x 25 =7865 j  (answer c)

How many grams of cacl2 are needed to make 713.9 g of a solution that is 29.0% (m/m) calcium chloride in water? note that mass is not technically the same thing as weight, but % (m/m) has the same meaning as % (w/w)?

Answers

The grams of CaCl2 needed to make 713.9 g of solution that is 29.0 %(m/m)is calculated as below
convert 29% into fraction = 29/100

therefore the mass of CaCl2  needed

=713 solution x 29/100=206.77 grams of CaCl2 is needed

Question 5 why does grinding solid crystals increase the rate of dissolving for a solid solute in water? smaller crystals are more polar. smaller crystals are more nonpolar. smaller crystals have more energy. smaller crystals have more surface area. none of the above

Answers

Grinding solid crystals increase the rate of dissolving for a solid solute in water because smaller crystals have more surface area. The solubility of a substance depends on the physical and chemical properties of the solute and solvent as well as the temperature, pressure and the pH of the solution. For example increase in temperature increases the rate at which a solute dissolves in a solvent.

Equal volumes of 1 molar hydrochloric acid (hcl) and 1 molar sodium hydroxide base (naoh) are mixed. after mixing, the solution will be:

Answers

HCl is a strong acid therefore complete ionisation takes place 
HCl ---> H⁺ + Cl⁻
1 mol of HCl dissociates to form 1 mol of H⁺
NaOH is a strong base therefore complete ionisation takes place 
NaOH ---> Na⁺ + OH⁻
1 mol of NaOH dissociates to form 1 mol of OH⁻ ions
equal number of moles of HCl and NaOH will dissociate to give out an equal number of moles of H⁺ and OH⁻ ions.
H⁺ + OH⁻ --> H₂O
equal amount of H⁺ and OH⁻ together forms H₂O
since all the H⁺ and OH⁻ have now reacted to form water molecules the solution now becomes neutral as there are no excess H⁺ ions to make the solution acidic and no excess OH⁻ ions to make the solution basic.

Therefore the solution will be neutral.

Consider this reaction: Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g).

Which combination of factors will affect the rate of the reaction?

Answers

Option are as follow,

A. temperature, concentration and surface area 
B. temperature, and concentration only 
C. concentration and surface area only 
D. temperature and surface area only

Answer:
           Option-A. Temperature, Concentration and Surface area

Explanation:

1) Increasing Temperature:
                                              Increase in temperature increases the Kinetic energy of molecules. This results in increase in the velocity and rate of collisions between reactants. Hence, greater the number of collisions between reactants per time greater will be the probability of formation of product per unit time.

2) Increasing Concentration
                                            Increase in concentration results in increase in number of particles of reactants per unit area, hence collision rate increases resulting in rate of reaction.

3) Increasing Surface Area
                                             Grinding of Zn results in the increase of surface area of Zinc. So greater the surface area greater is the exposure of Zinc metal to HCl molecules, hence the rate of formation of product increases.

Factors affecting the rate of a chemical reaction in the context of a specific reaction equation.

The factors that affect the rate of the reaction Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g) include:

Catalyst: Adding a catalyst can increase the rate of the reaction.

Surface area: Grinding the zinc solid into a fine powder increases its surface area, enhancing the reaction rate.

Concentration and Temperature: Increasing the concentration of HCl or raising the temperature can also speed up the reaction.

identify the type of molecule shown in the picture

Answers

1) acid
2) ether
3) ester
4) aldehyde 
5) ketone
6) amine 
7) alcohol 

The molecule containing a special group attached to its side chain is a fundamental group. The molecules are acid, ether, ester, aldehyde, ketone, amine, and alcohol.

What are functional groups?

Functional groups are the specialized molecules that are attached to the main chain and vary the chemical and physical properties of the compound. The molecule containing hydroxide is acid, and the single oxygen atom is ether.

Compound with double-bonded oxygen to alkyl or aromatic group is ester, carbonyl group on carbon with hydrogen and R group is an aldehyde, carbonyl group attached to carbon-containing two alkyl or aromatic groups is a ketone.

The Amine group includes an aromatic or an alkyl group attached to two hydrogens of the nitrogen atom. The alcohol group is the attachment of the -OH group to a carbon-containing hydrogen and R group.

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Question 4 the compound sodium sulfate is soluble in water. when this compound dissolves in water, which ion listed below would be present in solution? s2- na22+ o2- so42- none of the above

Answers

Answer is: SO₄²⁻ would be present in solution.
Balanced chemical reaction (dissociation):
Na₂SO₄(aq) → 2Na⁺(aq) + SO₄²⁻(aq).
The compound sodium sulfate dissociates in water on sodium cations (there are two sodium atoms in one molecule of sodium sulfate), charge charge of +1 and sulfate ion, charge -2.

Answer:

[tex]SO_4^-[/tex]

Explanation:

The sodium sulfate compound corresponds to a water soluble salt.

When a salt dissolves it will dissociate into the ions that compose it.

It dissociates into Cations (positively charged ions) and anions (negatively charged ions)

Sodium sulfate formula

[tex]Na_2SO_4[/tex]

Sodium sulfate when dissolved in water

[tex]Na_2SO_4\stackrel{H_2O}{\longrightarrow} 2Na^+SO_4^-[/tex]

Ions present in the solution:

[tex]Na^+[/tex] Cation

[tex]SO_4^-[/tex] Anion

An atom has 8 protons, 8 neutrons, and 8 electrons. another isotope of the same element might have

Answers

Isotopes are atoms of the same element that have the same number of protons and electrons but different number of neutrons.
Masses of atoms are the sum of protons and neutrons. Therefore when the number of neutrons change but protons are the same, then the masses of the atoms change.
isotope 1 has 8 protons , 8 electrons and 8 neutrons.
isotope 2 has 8 protons, 8 electrons and 10 neutrons

mass of isotope 1 is 16
and mass of isotope 2 is 18

Answer:It might have 10 neutrons

Reason: This is because an isotope of the same element must have the same number of electrons and protons so it can be assumed that the amount of neutrons can be changed.

How many moles and grams of NaOH are needed to dissolve in water to make 4 liters of a 2.0M solution?

Answers

The answers are 8.0 moles and 320 grams.
Solution:
Since we are given the concentration of the solution expressed in molarity and the volume of solution, we can use the equation for molarity defined as the number of moles of solute divided by the volume of the solution in liters:
     molarity = moles of solute / volume of solution in liters

We rearrange the expression to solve for the number of moles of the solute:
     moles of solute = molarity * volume of solution in liters
Substituting the given values, we have 
     moles of NaOH = (2.0 mol / 1L) * 4L = 8.0 mol

To calculate for the mass of NaOH solute, we will use the molar mass of NaOH that is equal to 40.0 g/mol: 
     mass of NaOH = 8.0 mol * (40.0g / 1mol) = 320 grams

If 5.25 mL of an unknown HCl sample was titrated with 25.3 mL of a 0.00100 M solution of NaOH to its equivalence point, what is the initial concentration of the acid?

4.64 × 10^-3 M


2.08 × 10^-2 M


4.82 × 10^-3 M


8.28 × 10^-4 M

Answers

NaOH +HCl ---> NaCl +H2O

n (mol HCl) = n (mol  NaOH)
M- molarity
V - volume

M(HCl)V(HCl) = M(NaOH)V(NaOH)
M(HCl)= M(NaOH)V(NaOH)/V(HCl) 

M(HCl)= 10⁻³*25.3 ml/5.25 ml=4.82 × 10⁻³ M molarity HCl
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