Answer:
Below I have listed a write up that helped me!
Explanation:
Here are some general rules regarding significant figures (or sigfigs!)
1) any number that is not a 0 is always a sigfig. In your example, the significant figures would be 4, 6, 7,3,5 and *0. (*there are special rules regarding the number 0)
2) If a 0 is between two non-zero digits (sigfigs), it will be a significant figure. For example, in the number 305, the 0 between the 3 and 5 would be considered a significant figure.
3) 0's that "lead", or are to the left of significant figures are NOT significant figures. For example, in the number 0.002, there would be only one significant figure, which is the 2.
4) 0's that "trail", or are to the right of a significant figure behind a decimal place, are significant figures. For example, in the number 3.1250, the 0 at the end would be considered significant. There are five sigfigs total in this number. The trailing 0 in your example would be significant!
5) However, regarding the rule above, if the number DOES NOT have a decimal place and has trailing 0's, those 0's will not be considered significant figures. For example, in the number 5,320, the 0 at the end would not be significant and there would be three sigfigs in this number.
Which pair of reactants will undergo aldol condensation to produce methyl vinyl ketone?
The pair of reactants which will undergo aldol condensation to produce methyl vinyl ketone is formaldehyde and acetone.
What is aldol condensation?
It occurs only with aldehydes but only those aldehydes which are having alpha hydrogen within them because when two different forms of aldehydes react the elimination of waters molecule occurs which needs one alpha hydrogen within it.
CH₂O + CH3COCH3 will give methyl vinyl ketone elimination of water molecule has to be done.
Therefore, the pair of reactants which will undergo aldol condensation
to produce methyl vinyl ketone are formaldehyde and acetone.
learn more about aldol condensation, here:
https://brainly.com/question/9415260
#SPJ4
A solution has a [h3o ] of 1 × 10−5 m. what is the [oh−] of the solution? 9 m 14 m 1 × 10−9 m 1 × 10−14 m
option (c) 1 × 10-9 m is the right answer.
The [oh−] of the solution having a [h3o ] of 1 × 10−5 m is 1 × 10-9 m.
What is [OH−] of the solution?The only component of water is H2O, and when the pH of the solution is 7, all of the ions have the same concentration, whereas during dissociation the water splits into H+ and OH- ions.
The concentration of OH- ions will be,
OH- = Kw {H3O+}
{H3O+} = 1 × 10−5 M.
Kw = 14
On substituting the value in the equation,
OH = 14 { 1 × 10−5 M.}
OH = 1 × 10−9 M
Consequently, the [H3O+] of the solution is 1 × 10-5 M.
Option (C) is the right choice because the [OH-] of the solution will be 1 × 10-9 M.
To learn more about [OH-] of the solution visit:
https://brainly.com/question/24134121
#SPJ4
what is the pH value of Potassium hydroxide
Answer:
from 10-14
Explanation:
the pH of potassium hydroxide is extremely high and is a strong base although the exact value depends on the concentration of the base in water.
Which metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe? auau cucu mnmn agag
Mn metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe. So, the correct option is (c) Mn.
Commonly, sacrificial electrodes are employed to stop another metal from corroding or oxidising. A metal that is more reactive than the metal being shielded must serve as the sacrificial electrode. Magnesium, aluminium, and zinc are the three metals most frequently used in sacrificial anodes.
Manganese-Magnesium (Mn-Mg) electrode is more suited for on-shore pipelines where the electrolyte (soil or water) resistivity is higher since it has the highest negative electropotential of the three. In order to replenish any electrons that could have been lost during the oxidation of the shielded metal, the highly active metal offers its electrons.
Therefore, Mn metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe. So, the correct option is (c) Mn.
Learn more about electrode here:
https://brainly.com/question/17060277
#SPJ4
Identify the location of reduction in an electrochemical cell. group of answer choices the electrode the anode the socket the cathode the salt bridge
The location of reduction in an electrochemical cell is called the anode.
An electrochemical cell ( galvanic cell ) is generate electric energy from chemical reactions. In galvanic cell species ( for example zinc and zinc cations ) from one half-cell lose electrons ( oxidation ) and species from other half-cell ( for example copper and copper cations ) gain electrons ( reduction ). Electric current is generated due to the flow of electrons from the anode that undergoes an oxidation reaction to the cathode which has a reduction reaction in the circuit of an outer wire circuit.
to learn more about electrochemical cell
https://brainly.com/question/22433727
#SPJ4
The heating element of a hair dryer dissipates 1500 w when connected to a 180 v outlet. part a what is its resistance?
The resistance of the heating element is 21.61 Ω
Given
The power dissipated = 1500 W
Voltage = 180 V
We know that
Power = Voltage * Current
⇒ Power / Voltage = Current
⇒ 1500 W/180 V = Current
⇒ 8.33 A = Current
In order to calculate the resistance of the heating element. We Have to apply the formula
Power = (Current)^2 * Resistance
⇒ Resistance = Power / (Current)^2
⇒ Resistance = 1500 W/ (8.33) ^2
⇒ Resistance = 21.61 Ω
Hence the resistance of the heating element is 21.61 Ω
Learn more about resistance here: -
“ https://brainly.com/question/17330679 “
#SPJ4
type of molecule is shown below?
H
O=C
H
Answer:
Carbonyl
Explanation:
While the diagram is slightly unclear, the molecule most likely being shown is a carbonyl. A molecule is a carbonyl when there is a carbon double-bonded to an oxygen.
Describe how the mass spectrometry readout is consistent with the chemical structure of hydrochloric acid.
The reading of mass so of hydrochloric acid involves sequence of analysis including:
Sample introductionAnalyte ionizationMass analysisIon detectionData processingThe chemical structure of hydrochloric acid is HCl
What is mass spectrometry?Mass spectrometry is defined as a special analytical technique that is used to measure the mass ratio of ions.
It is used to determine the masses of atoms of chemical elements
So therefore, the reading of mass so of hydrochloric acid involves sequence of analysis including:
Sample introductionAnalyte ionizationMass analysisIon detectionData processingLearn more about mass spectrometry:
https://brainly.com/question/17368088
#SPJ1
________ is the major intermolecular attraction responsible for the relatively high boiling points of alcohols.
Answer:
Hydrogen bonding is the major intermolecular attraction responsible for the relatively high boiling points of alcohols.
A gas effuses 4.0 times faster than oxygen (o2). what is the molecular mass of the gas? 1.0 g/mol 1.0 g/mol 2.0 g/mol 2.0 g/mol 4.0 g/mol 4.0 g/mol 7.67 g/mol
Answer:
32(molecular mass has no unit )
Explanation:
(16)(o2)
16×2
=32
A buffer containing 0.2000 m of acid, ha, and 0.1500 m of its conjugate base, a−, has a ph of 3.35. what is the ph after 0.0015 mol of naoh is added to 0.5000 l of this solution?
After 0.0015 mol of NAOH is added to 0.5000 l of this solution, the pH is 3.37.
StepsFirst, modify the Henderson-Hassle-batch equation to find the acid's pka.
[tex]pH=pka + log\frac{[A]}{[HA]}[/tex]
[tex]pka = pH-log\frac{[A]}{[HA]}[/tex]
[tex]=3.35- log \frac{[0.1500]}{[ 0.2000 ]}[/tex]
[tex]pka =3.47[/tex]
Molarity of the added NaOH.
[tex]M=\frac{mol}{L}[/tex]
[tex]=\frac{0.0015 mol}{ 0.5000L}[/tex]
= 0.003 M
In water, NaOH will dissociate
[tex]NaOH- > Na^{+} + OH^{-}[/tex]
strong base OH will react with HA
HA+ OH --> [tex]H_{2} O[/tex] + A
the reaction also produced A. as, all OH are consumed in the reaction
HA will be decreased by 0.003 M and A will be increased by 0.003 M.
[tex]HA= 0.2000-0.003 \\= 0.1970[/tex]
[tex]A=0.1500+0.003=0.1530 M[/tex]
solving new pH using pka and the new values of [HA] and [A]
[tex]pH=pka + log\frac{[A]}{[HA]}[/tex]
[tex]=3.35 + log\frac{[0.1530]}{[0.1970]}[/tex]
pH=3.37 is the ph after 0.0015 mol of naoh is added to 0.5000 l of this solution
learn more about buffer here
https://brainly.com/question/22390063
#SPJ4
In general ethers have a much lower boiling point than their isomeric alcohols. why?
Ethers have a much lower boiling point than their isomeric alcohols because ether have not hydrogen bond that why ethers have lower boiling point .
Ethers will not have a hydrogen atom attached to the oxygen atom as alcohols do. Because ether molecules can not form intermolecular hydrogen bonds, their boiling points are much shorter than those of alcohol with such a comparable mass.
Owing to the combination of intermolecular H-bonding in alcohols though not in ethers, alcohols possess higher boiling temperatures than isomeric ethers.
Therefore, ethers have a much lower boiling point than their isomeric alcohols because ether have not hydrogen bond that why ethers have lower boiling point .
To know more about boiling point
https://brainly.com/question/2153588
#SPJ4
A student makes up 2 l of a 3. 0 m aqueous solution of hbr. to this solution she adds 1 l of a 4 m naoh solution. what is the ph of the resulting solution?
A student makes up 2 l of a 3. 0 m aqueous solution of HBr. to this solution she adds 1 l of a 4 m NaOH solution, then the pH of the resulting solution is 13.83.
What is normality?Normality is defined as the ratio of equivalent mass of compound to the volume of solution in litre.
N1 is the normality of HBR = 3m
N2 is the normality of NaOH = 4m
V1 is the volume of the HBr = 2l
V2 is the volume of the NaOH = 1l
V is the total volume of solution = V1 + V2 = 2l +1l
= 3l
Normality of the solution = N
As we know that,
N1V1 - N2V2 = NV
3 × 2 – 4 × 1 = N × 3
6 – 4 = N – 3
N = 2/3 = 0.67 m
(OH-) = N = 0.67 m
Since normality of NaOH is greater than BR . Hence the resulting solution is alkaline.
pOH = -log[OH-]
POH = - log (0.67) = 0.17
As we know that,
PH + pOH = 14
pH = 14 – 0.17
= 13.83
Thus, we calculate that the pH of the resulting solution is 13.83.
learn more about pH:
https://brainly.com/question/12481995
#SPJ4
If the molar mass of na2so4•nh2o is 304.04 g/mol, what is the hydration number 'n'?
Hydration number is 9
Given:
molar mass of na2so4•nh2o = 304.04 g/mol
To Find:
hydration number 'n'
Solution: hydration number is the number of molecules of water with which an ion can combine in an aqueous solution of given concentration.
Atomic mass of Na = 23g
S = 32g
0 = 16g
H = 1g
Molar mass of the compound is evaluated as:
2(23) +32 + 4(16) + n[2(1) +16] = 304.04
46 +32 +64 +18n = 304.04
142 +18n = 304.04
18n = 304.04 - 142
18n = 162.04
n = 9
So, hydration number is 9
Learn more about Hydration number here:
https://brainly.com/question/1313076
#SPJ4
Which reaction most accurately represents the dissociation of nitrous acid (hno2) in water?
When nitrous acid (HNO₂) dissociates in water (H₂O), the reaction that best captures this process is:
HNO₂ (aq.) + H₂O ↔ H₃O⁺ (aq.) + NO₂⁻ (aq.)
How does one know about HNO₂?
The chemical designation for nitrous acid is HNO₂, and it is a monoprotic acid. Three elements—hydrogen(H), oxygen(O), and nitrogen(N), all compose it. It is highly fragile in nature and only occurs in solutions. It is employed to convert amines into diazonium salts.Is HNO₂ a basic or an acid?
Acidity is assigned to nitrous acid (HNO₂). Once dissolved in water, it gives out H+ ions. Acid is a chemical that produces H+ ions in a water-based solution or gives the protons to other molecules.
Thus, HNO₂ is acid because it causes a mixture of water to contain H+ ions. In a 10 mM concentration, it possesses a pH of 2.67.
Learn more about nitrous acid here:
https://brainly.com/question/17055219
#SPJ4
A piece of metal was heated and then put it into 100.0 mL of water, initially at 21.2 *C. The metal and water were allowed to come to an equilibrium temperature, determined to be 32.0 *C. How much energy did the water absorb? (look at picture)
Answer:
4510 J
Explanation:
To calculate the energy of the water, you need to use the following equation:
Q = mcΔT
In this equation,
-----> Q = energy/heat (J)
-----> m = mass (g)
-----> c = specific heat capacity (J/g°C)
-----> ΔT = change in temperature (°C)
First, you need to determine the mass of the water. To do this, you need to multiply the given volume by the density of water (1.00 g/mL).
100.0 mL H₂O 1.00 g
------------------------ x ------------ = 100.0 g H₂O
1 mL
Now, you can plug the given values into the equation and solve for "Q" (Q = [tex]q_H_2_O[/tex]). The final answer should have 3 significant figures to match the given values with the lowest number of sig figs.
Q = ? J c = 4.18 J/g°C
m = 100.0 g ΔT = 32.0 °C - 21.2 °C = 10.8 °C
Q = mcΔT
Q = (100.0 g)(4.18 J/g°C)(10.8 °C)
Q = 4510 J
4510Answer:
Explanation:
If the viscosity of a solution is quadrupled, the rms-average distance of a collection of diffusing molecules from their starting point would be _________ over the same amount of time
The viscosity of a solution is quadrupled, the rms-average distance of a collection of diffusing molecules from their starting point would be [tex]\frac{1}{2}[/tex] over the same amount of time.
If the viscosity of a solution is quadrupled then the distance of collection of diffusing molecules would be half over the same amount of time. The viscosity of the molecules is dependent on density of the liquid. It is independent to the volume of the liquid.
What is viscosity?Viscosity is measure of a fluid's resistance of flow.
The SI unit of viscosity is Poiseuille (PI) is other units ae newton second per square meter or pascal second. The dimensional formula of viscosity is [[tex]ML^{-1}T^{-1}[/tex]].
The viscosity of liquids decreases rapidly with an increase in temperature, and the viscosity of gases increases with an increase in temperature.
η = [tex]\frac{2ga^{2} (Δρ)}{9v}[/tex]
Where (Δρ) is the density difference between fluid and sphere tested, a is the radius of the sphere, g is the acceleration due to gravity and v is the velocity of the sphere.
Viscosity Types:
Viscosity is the measure of fluid's friction to it's flow. There are two ways to measure the fluid is viscosity is follows:
Dynamic Viscosity (Absolute Viscosity)Kinematic ViscosityLearn more about Viscosity: https://brainly.com/question/23999611
#SPJ4
When comparing the titration curves for the titration of a strong acid with a strong base and the titration of a weak acid with a strong base, which portion of the curves will be the most similar?
When comparing the titration curves for the titration of a strong acid with a strong base and the titration of a weak acid with a strong base, pH increases when we reach the equivalent point.
In strong acid and strong baseInitially the pH rises little by little. This is because the scale of the pH increases is logarithmic. Then it rises sharply near the equivalent point. At this point the remaining hydronium ions are low, and only a small amount of hydroxide ion is needed to raise the pH.
For weak acid and strong baseWeak acid has low pH but second point is firstly the pH rises faster but less quickly when approaching the equivalent point.
The pH produced by titration of weak acid with strong base rises faster at first but less quickly when approaching the equivalent point.
learn more about titration curve:
https://brainly.com/question/2728613
#SPJ4
What are the conjugate acid-base pairs in the reaction of h2seo4h2seo4 with h2oh2o? h2seo4 h2o→productsh2seo4 h2o→products view available hint(s)
The conjugate acid is H2SeO4 and the conjugate base pairs in the reaction is H2O.
The full equation of the reaction is
H2SeO4 + H2O----- H3O^+(aq) + HSeO4
What is conjugate base?Conjugate base are those substance formed when an acid loses a hydrogen ion. Considered a base because it can gain a hydrogen ion to reform the acid.
The conjugate acid is the species that donate a proton to the conjugate base, hence H2SeO4 is the conjugate acid while H2O is the conjugate base because it accepts a proton from H2SeO4.
Thus we concluded that the conjugate acid is H2SeO4 and the conjugate base pairs in the reaction is H2O.
learn more about conjugate acid-base:
https://brainly.com/question/8908134
#SPJ4
How many grams are in 0.0667 moles of MgCl 2?
A.
6.35
B.
1430
C.
7.01
D.
.523
Answer:
A.) 6.35
Explanation:
To find the mass of MgCl₂, you need to multiply the given value by the molar mass. The molar mass is made up of each element's atomic mass times their quantities. It is important to arrange the conversion in a way that allows for the cancellation of units.
Atomic Mass (Mg): 24.305 g/mol
Atomic Mass (Cl): 35.453 g/mol
Molar Mass (MgCl₂): 24.305 g/mol + 2(35.453 g/mol)
Molar Mass (MgCl₂): 95.211 g/mol
0.0667 moles MgCl₂ 95.211 grams
--------------------------------- x ------------------------ = 6.35 grams MgCl₂
1 mole
What is the concentration of the hydroxide ion given that the concentration of the hydronium ion?
The concentration of the hydroxide ion given that the concentration of the hydronium ion 1.0 times 10^-14 M. The reverse mathematical method used to determine the pOH can be used to get the hydroxide ion concentration from the pOH. How many hydroxide ions are there in a solution with a pOH of 5.70, for instance.
Calculate 10-5.70, or "inverse" log, on a calculator (- 5.70). It indicates that one hydroxide ion is produced by one part of the NaOH solution. Because of this, the molar concentration of hydroxide ions in the solution is the same as the molar concentration of the NaOH.
To learn more about hydroxide, click here.
https://brainly.com/question/4251554
#SPJ4
A formic acid buffer solution contains 0. 20 m h c o o h hcooh and 0. 24 m h c o o − hcoox−. the pka of formic acid is 3. 75. what is the ph of the buffer?
A buffer solution contains an equivalent amount of acid and base. The pH of the solution with an acid dissociation constant (pKa) value of 3.75 is 3.82.
What is pH?The amount of hydrogen or the proton ion in the solution is expressed by the pH. It is given by the sum of pKa and the log of the concentration of acid and bases.
Given,
Concentration of salt [HCOO⁻] = 0.24 M
Concentration of acid [HCOOH] = 0.20 M
The acid dissociation constant (pKa) = 3.75
pH is calculated from the Hendersons equation as,
pH = pKa + log [salt] ÷ [acid]
pH = 3.75 + log [0.24] ÷ [0.20]
= 3.75 + log (1.2)
= 3.75 + 0.079
= 3.82
Therefore, 3.82 is the pH of the buffer.
Learn more about pH here:
https://brainly.com/question/27181245
#SPJ4
What mass of copper could be electroplated on the cathode in an experiment where an average of 200 ma was passed through the cell for 35 minutes?
There are 0.138 gram copper could be electroplated on the cathode in an experiment where an average of 200 ma was passed through the cell for 35 minutes .
Calculation ,
Given ; Current passed through copper ( I ) = 200 mA = 200×[tex]10^{-3}[/tex] A
time in second = 35 minutes×60 = 2100 sec
Current ( I )= Q/t
Q =It = 200×[tex]10^{-3}[/tex] A × 2100 sec = 420 C
96500 C of charge = 1 mole
420 C of charge = 1 mole ×420 C/ 96500 C = 0.00435 mol
In , the valancy of Cu is +2 .
2 moles of electron are required for the decomposition of 1 mole of Cu on the cathode .
0.00435 mol of electron are required for the decomposition of Cu = 1mol × 0.00435 mol/2 = 0.002175 mol of Cu
Number of moles of Cu = given mass / molar mass
Mass of Cu = Number of moles of Cu × molar mass = 0.002175 ×63.546
Mass of Cu = 0.138 gram
Therefore , mass of copper is 0.138 gram
To learn more about copper
https://brainly.com/question/13677872
#SPJ4
A compound composed of 3. 3 % h, 19. 3 % c, and 77. 4 % o has a molar mass of approximately 60 g/mol. What is the molecular formula of the compound?.
The molecular formula of the given compound is [tex]$\mathrm{H}_{2} \mathrm{CO}_{3}$[/tex] also known as Carbonic acid.
What is empirical formula and molecular formula?The simplest whole-number ratio of the various atoms in a compound is represented by an empirical formula.
The precise number of various atom types present in a compound's molecule is indicated by the molecular formula.
Given that,
H = 3.3%
C = 19.3%
O = 77.4%
No. of moles of H = 3.3/1
No. of moles of H = 3.3
No. of moles of C = 19.3 / 12
No. of moles of C = 1.60
No. of moles of O = 77.4/16
No. of moles of O = 4.83
Therefore, the ratio of the atoms of C, H and O = 3.3 : 1.60 : 4.83
Divide by smallest value which you get =3.3 / 1.60 : 1.60 / 1.60 : 4.83 / 1.60
The ratio of the atoms of C, H and O = 2 : 1 : 3
So, the empirical formula is [tex]$\mathrm{H}_{2} \mathrm{CO}_{2}$[/tex]
Let the molecular formula is [tex]$\left(\mathrm{H}_{2} \mathrm{CO}_{3}\right) \mathrm{n}$[/tex]
Then, molar mass [tex]$=(2 \times 1+1 \times 12+3 \times 16) n\\[/tex]
Molar mass = 62n
As the question, 62 n = 60
n = 0.96 or n = 1 (rounded off to nearest ones)
So, the molecular formula is [tex]$\left(\mathrm{H}_{2} \mathrm{CO}_{3}\right) 1=\mathrm{H}_{2} \mathrm{CO}_{3}$[/tex] i.e., the compound is Carbonic acid.
To know more about molecular formula visit:
https://brainly.com/question/14425592
#SPJ4
A label on an empty sample container reads 12. 00 g. you add in a sample of a compound and mass the sample container obtaining 15. 5465 g. what should the mass of the sample be reported as?
The mass of the substance is the quantitative measure of the physical object. The mass of the sample must be reported as 3.5465 g. Thus, option e is correct.
What is mass?The mass of the substance is the quantity of matter that the sample weighs and is reflected in grams or kilograms.
Given,
Mass of empty sample container = 12.00 g
Mass of sample + empty container = 15.5465 g
The mass of the sample will be given as,
mass of sample = (Mass of sample + empty container) - ( Mass of empty container)
= (15.5465 g - 12.00g)
=3.5465 g
Therefore, 3.5465 gm is the mass of the sample, and the correct option is e.
Your question is incomplete, but most probably your full question was, A label on an empty sample container reads 12.00 g. you add in a sample of a compound and the mass of the sample container obtaining 15.5465 g. what should the mass of the sample be reported as?
3.546 g3.54 g4 g4.0 g3.5465 gLearn more about mass here:
https://brainly.com/question/17270802
#SPJ4
How much has co2 increased in the atmosphere since 1750? group of answer choices
Since 1750, about 46 percent of CO2 is increased in the atmosphere.
Co2 gas is considered as Greenhouse effect.
Green house effect : The trapping of the sun's warmth in a lower atmosphere of planet, due to the more and more transparency of the atmosphere to visible radiation from the sun than the infrared radiation which are emitted by the surface of the planet.
Due to greenhouse effect the temperature of earth surface increases.
Many reasons for increase in Greenhouse effect are as follow:
DeforestationBurning of fossil fuels.FarmingIndustrial waste and landfills. Global warmingdepletion of ozone layerAir pollutionDue to these reason the percentage of CO2 in the atmosphere is increased by 46.
Learn more about greenhouse effect:
https://brainly.com/question/21656193
#SPJ4
Draw the mechanism for the reaction of acetyl chloride (ethanoyl chloride) with the ethoxide anion to yield ethyl acetate (ethyl ethanoate)
Ethanoyl chloride is a common acyl chloride. Any other acyl chloride will function similarly. Similarly, ethanol is regarded as a typical alcoholic beverage. simply substitute the CH3CH2 group with an alkyl group.
The first stage of the reaction (the addition stage) includes a nucleophilic attack on the relatively positive carbon atom by one of the lone pairs on an ethanol molecule's oxygen.
The second stage (elimination) occurs in two stages. The carbon-oxygen double bond reforms in the first step, releasing a chloride ion.
The ethanoyl chloride then removes a hydrogen ion, yielding ethyl ethanoate and hydrogen chloride.
To learn more about ethanoyl chloride please visit -
https://brainly.com/question/13043444
#SPJ4
If it takes 35. 04 ml of a 0. 2455 m naoh solution to neutralize 25. 00 ml of an unknown hcl solution, what is the molarity of the hcl solution?
If it takes 35.04ml of a 0.2455M NaOH solution to neutralize 25. 00ml of an unknown HCl solution, the molarity of the HCl solution is 0.34M.
How to calculate molarity?The molarity of a solution can be calculated using the following formula:
C1V1 = C2V2
Where;
C1 = molarity of acidC2 = molarity of baseV1 = volume of acidV2 = volume of baseAccording to this question, it takes 35. 04ml of a 0. 2455M NaOH solution to neutralize 25.00ml of an unknown HCl solution. The molarity of the HCl can be calculated as follows:
35.04 × 0.2455 = 25.0 × V2
8.602 = 25C2
C2 = 8.6/25
C2 = 0.34M
As a result, the molarity of the HCl solution is 0.34M if it takes 35. 04ml of a 0.2455M NaOH solution to neutralize 25ml of an unknown HCl solution.
Learn more about molarity at: https://brainly.com/question/8732513
#SPJ1
When magnesium reacts with hydrochloric acid, hydrogen gas is produced. The amount of gas produced is dependent upon the concentration of hydrochloric acid. Below is the data for a reaction with 1 molar hydrochloric acid. Determine which of the choices shows possible data for a reaction with 2 molar hydrochloric acid. time (mins) 0 123TLON8S 4 5 6 7 9 10 1 M acid hydrogen (cm³) ARANY 17 ATE 230VEL TEEN 0 14 24 31 36 41 44 46 47 48 48
Magnesium is a metal that reacts quickly. Magnesium chloride or hydrogen gas will be produced during the reaction with hydrochloric acid. Following will happen as a result: Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g).
What happens in the magnesium-hydrochloric acid equation reaction?The equation for how magnesium interacts with hydrochloric acid reads: Mg(s)+2 HCl(aq) = MgCl2(aq)+H (g) This experiment can be used to demonstrate the production of hydrogen gas, a single displacement reaction, or even the typical reaction for metals with acid.
Why do hydrochloric acid and magnesium produce heat?Because energy was released into the environment when magnesium or oxygen particle collide to create new bonds, burning magnesium is indeed an exothermic reaction. Baking soda and citric acid react endothermically when the temperature drops. As the temperature rises, magnesium or hydrochloric acid undergo exothermic reactions.
To know more about metal visit:
https://brainly.com/question/29404080
#SPJ1
1. There are 42 grams of sugar (C12H22O11) in a can of pop (342mL). Use this information (where necessary) to answer the following questions:
a) How many moles of sugar are there in the pop (3 marks)?
b) If a mole of sugar costs 90 cents, what is the value of the sugar in a can of pop (3 marks)?
c) How many particles of sugar are there in the pop (3 marks)?
The number of sugar particles is 7.4 * 10^22 particles.
What is the mole?The mole is used to describe the amount of substance. The idea was first introduced by Professor Avogadro and the number of particles that constitute one mole of a substance was said to be 6.02 * 10^23 particles in a mole.
Thus;
Molar mass of sugar = 342 g/mol
Number of moles of sugar = 42 grams/342 g/mol = 0.123 moles
Now;
If 1 mole of sugar costs 90 cents
0.123 moles of sugar costs 0.123 moles * 90 cents/1 mole
= 11 cents
Now we know that;
1 mole of sugar contains 6.02 * 10^23 particles
0.123 moles of sugar contains 0.123 moles * 6.02 * 10^23 particles / 1 mole
= 7.4 * 10^22 particles
Learn more about moles of sugar:https://brainly.com/question/14434096
#SPJ1