Answer: The pH of the solution is 2.74.
Explanation:
To calculate the pH of the acidic buffer, the equation for Henderson-Hasselbalch is used:
[tex]pH=pK_a+\log (\frac{\text{[conjugate base]}}{\text{[acid]}})[/tex] .......(1)
The power of the acid dissociation constant is the negative logarithm of the acid dissociation constant. The equation for it is:
[tex]pK_a=-log K_a[/tex] ......(2)
The chemical equation for the reaction of acetic acid and NaOH follows:
[tex]CH_3COOH+NaOH\rightleftharpoons CH_3COONa+H-2O[/tex]
Given values:
[tex]K_a=1.8\times 10^{-5}[/tex]
Putting values in equation 2:
[tex]pK_a=-log (1.8\times 10^{-5})\\\\pK_a=4.74[/tex]
We are given:
[tex]CH_3COOH[/tex] = 0.1 M
[tex]CH_3COONa[/tex] = 0.001 M
Plugging values in equation 1:
[tex]pH=4.74+\log (\frac{0.001}{0.1})\\\\pH=4.74-2\\\\pH=2.74[/tex]
Hence, the pH of the solution is 2.74.
How many moles of H20 are produced from 3 moles of oxygen?
2 H2+O2 -> 2 H2O
Answer:
6 moles
Explanation:
because if conducting a moles ratio for oxygen and water it is 1:2 so the moles would calculate up to 6 moles after cross multiplication.
PLS HELP
When 50.0 g of copper was reacted with 300.0 g of silver nitrate solution, 149 g of silver was obtained. What is the percent yield of silver obtained?
Answer:
Percent yield of silver obtained = 78.18% (Approx.)
Explanation:
Given:
Amount of copper = 50 gram
Amount of silver nitrate = 300 gram
Amount of silver = 149 gram
Find:
Percent yield of silver obtained
Computation:
Percentage of Silver in silver nitrate = 108[100/(108+14+48)]
Percentage of Silver in silver nitrate = 108/[100/170]
Percentage of Silver in silver nitrate = 63.53% (Approx.)
Amount of Silver produced = [63.53%][300]
Amount of Silver produced = 190.59 gram
Percent yield of silver obtained = [Amount of silver / Amount of silver produced]100
Percent yield of silver obtained = [149/190.59]100
Percent yield of silver obtained = 78.18% (Approx.)
Why hydrogen iodide is not produced by the same method is for HCL.
Answer:
acidic in the order. HBr and HI can't be prepared like H
They ic in the order . HBr & HI can,t be prepared like HCl by using Concentrated
Answer:
acidic in the order. HBr and HI can't be prepared like H
They ic in the order . HBr & HI can,t be prepared like HCl by using Concentrated
If 10.0 moles of NO are reacted with 6.0 moles of O2, How many moles of NO2 are produced?
Answer:
We have to find out which of the reactants that is the Limiting Reagent.
The Limiting Reagent is the reactant that finishes before reaction is complete or simply put... Its the reactant that's NOT IN EXCESS.
We use the reactant that's not in excess to find the Number of moles of product because once that reactant is used up.... The reaction also ends or stops(hence the name;Limiting reactant).
Now
We have 10moles of NO
We also have 6moles of O2
The balanced equation of Reaction is
2NO + O2 ===> 2NO2
Now
looking at this equation
2moles of NO is required to react with 1mole of O2
So since we have NO=10moles and O2 = 6moles
It means that
20moles of NO is required to react with 6 moles of O2.
We were only given 10moles of NO and this is not even enough to react with the whole 6moles of Oxygen because from what we just discovered... We need 20moles of NO to react with all 6moles of O2.
So
This means that NO is the LIMITING REACTANT. It is in short supply and would be used up before the whole reaction takes place.
So we use the limiting reactant to find the Number of Moles of Product formed.
Now
From the eqn of reaction
2moles of NO forms 2Moles of NO2.
Their Mole ratio is 2:2 or 1:1...
This simply means that an equal amount of NO2 will be Produced
MEANING.... 10 MOLES OF NO2 IS PRODUCED.
HAVE A GREAT DAY!!!
A more electronegative atom A) will have more attraction to the electrons in a chemical bond. B) is more likely to lose an electron. C) is less likely to form a chemical bond. D) is more likely to form an ionic bond with another highly electronegative atom.
Answer: A more electronegative atom will have more attraction to the electrons in a chemical bond.
Explanation:
An atom that is able to attract electrons or shared pair of electrons more towards itself is called an electronegative atom.
For example, fluorine is the most electronegative atom.
Due to its high electronegativity it is able to attract an electropositive atom like H towards itself. As a result, both fluorine and hydrogen will acquire stability by sharing of electrons.
Thus, we can conclude that a more electronegative atom will have more attraction to the electrons in a chemical bond.
The half-life of phosphorous-32 is 14.28 days. How many days are required for 4.68 g to remain if you start with 74.88
grams
pcl3 give me brief explanation donot obey octet rule? I will give him brainlist?
Answer:
Explanation:
PCl3, the octet for both phosphorus and Chlorine atoms is complete. Therefore, it follows the octet rule.
How many grams of P2O3 are needed to react with 248 g of NaOH ?
Answer:
170.43g P2O3
Explanation:
First write and balance the equation:
P2O3 + 4NaOH → 2Na2HPO3 + H2O
NaOH=39.997 g/mol P2O3= 109.945 g/mol
248g NaOH x 1 mol NaOH/39.997g NaOH x 1 mol P2O3/4 mol NaOH x
109.945g P2O3/ 1 mol P2O3 = 170.43g P2O3
A metal cube with a specific heat capacity of .55
J/gºC, a mass of 55grams and a temperature of 85°C
is immersed in water at 20°C. The metal and water
then reach a equilibrium temperature of 23°C. What is
the mass of the water?
Answer:
148.85 g or 0.14885 kg
Explanation:
Applying,
Heat lost by the metal cube = heat gained by the water.
c'm'(t₁-t₃) = cm(t₃-t₂).................. Equation 1
Where c' = specific heat capacity of the metal, m' = mass of the metal, c = specific heat capacity of water, m = mass of water, t₁ = Initial temperature of the metal, t₂ = Initial temperature of water, t₃ = equilibrium temperature.
make m the subject of the equation
m = c'm'(t₁-t₃)/c(t₃-t₂).............. Equation 2
From the questions,
Given: c' = 0.55 J/g.°C, m' = 55 g, t₁ = 85°C, t₂ = 20°C, t₃ = 23°C
Constant: c = 4.2 J/g.°C
Substitute these values into equation 2
m = 0.55×55×(85-23)/(4.2×[23-20])
m = 1875.5/12.6
m = 148.85 g.
m = 0.14885 kg
Which piece of glassware shown below is used to hold and dispense a solution of known concentration during a titration?
Answer:
Answer C
Explanation:
Got it off of q**zlet ;)
Answer
Its C confirmed
Explanation:
Just did the test
Consider the reaction 4FeS2 + 11O2 → 2Fe2O3 + 8SO2. If 8 moles of FeS2 react with 15 moles of O2, what is the limiting reactant? (3 points)
SO2
O2
Fe2O3
FeS2
Answer:
O2
Explanation:
for find the limiting reactant you must calculate the moles of the reactants from the amount that you have and from the MM:
MM FeS2 = 120n = 26.2g / 120g/mol = 0,218 mol
MM O2 = 32n = 5,44g/32g/mol = 0,17 mol
The limiting reactant is
O2
hello HELP ME pLS ANYONE with this question I will give u 18 points pls I need real help here:((
Answer:
Boiling - The process of a liquid changing to gas.
Boiling point - The temperature at which a liquid boils.
Condensing - The process of a gas changing to a liquid.
Distillate - The liquid collect from the condenser.
Residue - The liquid left behind in the distillation flask.
Vapour - Another name for gas.
Hope it helps :)
How many moles are in 152 grams of H20?
Answer:
8.437282129392383
Explanation:
We assume you are converting between grams Water and mole.
You can view more details on each measurement unit:
molecular weight of Water or mol
The molecular formula for Water is H2O.
The SI base unit for amount of substance is the mole.
1 grams Water is equal to 0.055508435061792 mole.
Note that rounding errors may occur, so always check the results.
Answer:
8.44moles
Explanation:
8.44moles
which element is found in period 6 group 14
Answer:
Lead
that can be found in the periodic table of elements
Explanation:
When light is refracted
A.
it changes its direction as it passes into a new medium.
B.
it changes it direction and stays in the same medium.
C.
it keeps moving in the same direction as it passes into a new medium.
D.
it is absorbed as it strikes the surface of a new medium.
[tex]\huge{ \mathfrak{ \underline{ Answer }}}[/tex]
Refraction is a phenomenon in which, light bends itself while moving from from one Medium to another. This occurs due to change in speed of light in different mediums.
Therefore correct option is :
A. it changes its direction as it passes into a new medium.
I hope it helped you !!
[tex] \boxed{ \boxed{\huge{ \mathrm{ \underline{ Answer} \: \: }}}}[/tex]
The Correct option will be : -
A. it changes its direction as it passes into a new medium.
because, light travels with different speeds in different mediums, and this occurs due to difference in optical density of different mediums.
And bending of light depends upon the change in medium,
for example :
when travelling from optically denser medium to optically rarer medium it bends away from normal.when travelling from optically rarer medium to optically denser medium it bends towards the normal._____________________________
[tex]\mathrm{ ☠ \: TeeNForeveR \: ☠}[/tex]
7. In science, the process/thing that you examine/focus on is called the ??
and anything outside of this focus is called the ??
Answer:
Subject of the experiment and out of scope
Explanation:
In any research study, the process of thing studied is basically the subject of the experiment on which research is conducted to determine the outcomes. If any thing lies out of the experimental process reach, then it is said to be out of scope of the experiment.
80. When water forms ice, hydrogen bonds around a water molecules are at ... apart.
1.
30 °C
2. 45 °C
3.
90 °C
4.
180 °C
5. 35 °C
6. I do not know.
N
Answer:
6
Explanation:i dont know
The volume of a gas is decreased from 100 liters at 173.0°C to 50 liters at a constant pressure. After the decrease in volume, what is the new temperature of the gas?
Answer:
223.08 K
Explanation:
First we convert 173.0 °C to K:
173.0 °C + 273.16 = 446.16 KWith the absolute temperature we can use Charles' law to solve this problem:
T₁V₂=T₂V₁Where in this case:
T₁ = 446.16 KV₂ = 50 LT₂ = ?V₁ = 100 LWe input the data:
446.16 K * 50 L = T₂ * 100 LAnd solve for T₂:
T₂ = 223.08 KPure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. When 3.31 g of magnesium ribbon burns with 8.45 g of oxygen, a bright, white light and a white, powdery product are formed. Enter the balanced chemical equation for this reaction. Be sure to include all physical states.
Answer:
2Mg(s) + O2(g) ----->2MgO(s)
Explanation:
In writing a balanced chemical reaction equation, the rule of thumb is that the number of atoms of each element on the reactant side must be the same as the number of atoms of the same elements on the products side.
Hence for the reaction of magnesium and oxygen shown below;
2Mg(s) + O2(g) ----->2MgO(s)
We notice that there are two atoms each of magnesium and oxygen on both sides of the reaction equation hence the equation is balanced.
What happens when 10g of nitrogen combines with 10 grams of hydrogen
It would create 12.1 g of ammonia (NH3).
The amount of hydrogen that is reacted in this reaction is:
(10 g N2)[tex](\frac{3.0gH2}{14.0gN2}) =[/tex] 2 g H2
According to the Law of Conservation of Mass, the mass of ammonia produced is the combination of hydrogen and nitrogen reacted or:
2.1g + 10.0g = 12.1 g of NH3
Question 2
4 pts
Inside a car that was at STP, a 0.95 L bottle warms up to 144 C. If the volume of the bottle
remains constant, what is the pressure, in atm, inside the hot water bottle?
Answer:
1.53 atm
Explanation:
From the question given above, the following data were obtained:
Volume = constant
Initial pressure (P₁) = stp = 1 atm
Initial temperature (T₁) = 273 K
Final temperature (T₂) = 144 °C = 144 °C + 273 = 417 K
Final pressure (P₂) =?
Since the volume is constant, the final pressure can be obtained as follow:
P₁ / T₁ = P₂ / T₂
1 / 273 = P₂ / 417
Cross multiply
273 × P₂ = 417
Divide both side by 273
P₂ = 417 / 273
P₂ = 1.53 atm
Therefore, the final pressure (i.e the pressure inside the hot water bottle) is 1.53 atm.
a. how many grams of H2SO4 are in 3.5 liters of 2.0 M H2SO4
b. how many liters of 2.0 M H2SO4 would be made from 3 liters of water. (Hint water has a density of 1g per mL.)
Answer:
a. 686g of H2SO4 are present.
b. 3.321L would be made
Explanation:
a. Molarity, M, is an unit of concentration defined as the ratio between moles of solute (In this case H2SO4) and liters of solution. The moles of H2SO4 in 3.5L of 2.0M H2SO4 are:
3.5L * (2.0mol H2SO4 / L) = 7.0 moles H2SO4
The mass is obtained using molar mass of H2SO4 -98g/mol-:
7.0 moles H2SO4 * (98g / mol) = 686g of H2SO4 are present
b. The density of H2SO4 is 1.83g/mL. The volume of 2.0M H2SO4 per liter of solution is:
2.0mol H2SO4 / L * (98g / mol) * (1mL / 1.83g) = 107mL of H2SO4 are present per liter of solution. In 3L there are:
3L (107mL / L) = 321mL = 0.321L of H2SO4 must be added to 3L of water to produce 2.0M H2SO4. The total volume is:
3L + 0.321L = 3.321L would be made
You start with 0.1 L of a 5.00 M solution, and you plan to dilute it to make a
solution with a concentration of 0.625 M. How much water did you add to
the container?
a) 800ML
b) 100ml
c)700ml
d)750ml
Name the substance which occurs in all the physical states in nature?
Answer: water
For many centuries, it was considered that there were only three states of matter: solid, liquid and gas (the three that are present and stable in our world). And water is the substance that best represents them, because it is the only one that exists naturally in the three states.
Explanation: Matter can exist in one of three main states: solid, liquid, or gas.
Solid matter is composed of tightly packed particles. ...
Liquid matter is made of more loosely packed particles. ...
Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.
Answer:
Water is the only common substance that is naturally found as a solid, liquid or gas. Solids, liquids and gases are known as states of matter.
Feel free to mark it as brainliest :D
Ignore this part unless you want to understand out of your syllabus:
However, if you take into account the fifth state of matter, Bose-Einstein Condensate, which has been recently discovered, there is no substance as such.
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When aqueous solutions of potassium nitrite and nitric acid are mixed, an aqueous solution of potassium nitrate and nitrous acid results. Write the net ionic equation for the reaction.
Nitric acid and potassium nitrite reacted together potassium nitrate and nitrous acid forms. The net ionic equation for the reaction is given below:
[tex]\rm K^{+} (aq)+ NO_{3} ^{-} (aq)\rightarrow KNO_{3}(s)[/tex]
What is ionic equation?A balanced reaction represents all the reactants and products in perfect stoichiometry. Thus, each element have to be equal in number on both side.
A balanced ionic equation represents all the ions participating in a reaction and with their charges balanced on both side and state of the reaction is given in brackets. Net ionic equation represents the formation of a solid precipitate.
The complete ionic equation of reaction of one mole of potassium nitrite with one mole of nitric acid is given below:
[tex]\rm K^{+} + NO_{2}^{-}(aq) + H^{+} (aq) +NO_{3}^{-}(aq) \rightarrow H^{+} (aq) + NO_{2}^{-}(aq) + KNO_{3} (s)[/tex]
Cancelling the aqueous ions from both sides we get the net ionic equation representing the formation of solid potassium nitrate as shown here:
[tex]\rm K^{+} (aq)+ NO_{3} ^{-} (aq)\rightarrow KNO_{3}(s)[/tex]
To find more on ionic equations, refer here:
https://brainly.com/question/15467502
#SPJ5
BRAINIEST AND POINTS
Which option below accurately describes the relationship between wavelength and energy level?
A. Longer wavelength means higher energy level.
B. Shorter wavelength means higher energy level.
Answer:
shorter waves equal more power
Explanation:
"higher frequency and shorter wavelengths are one in the same thing. the higher frequency - higher energy results from Planck's realization of the quantization of light and resulting E=hf equation"
What is the volume of a bubble if the original was .25 m^3 at 4 atm and the pressure was reduced to 1 atm?
Answer:
1.00 m^3
Explanation:
Boyles law says that PV = constant, or P1V1=P2V2, while temperature remains constant.
0.25 m^3 *4 atm = V* 1 atm
V = 0.25 m^3 / (1/4)
= 1 m^3
The largest pieces being dragged along the streambed are undergoing the process called ________. pushing saltation traction suspension solution
Answer:
saltation
Explanation:
Saltation is the transportation of particles by fluids such as by winds and water. It takes place when loose matter is removed from the sea bed and gets carried by the fluid back to the surface. Examples include pebbles, sand, and soil. Saltation layers can form during avalanches.suggest me some good korean or Thai or English movie
for example I am suggesting - 8th graders don't cry , so young 2 never gone , Cinderella 2015, Titanic , slumdog millionaire...
Answer:
try to see THE PIXELS, AVENGERS, JOKER, CHARLIE'S ANGEL, JUSTICE LEAGUE,IT ,THE NUN ETC
Answer:
watch movie COCO and croods a new age