what is the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H2O
Considering the definition of pH, the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H₂O is 1.0969.
Definition of pHpH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]
The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.
Concentration of HClMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
[tex]Molarity=\frac{number of moles}{volume}[/tex]
In this case, you know:
number of moles=[tex]3.65 grams x\frac{1 mole}{36.45 grams} =[/tex] 0.1 moles (being 36.45 g/mole the molar mass of HCl)volume= 1250 mL= 1.250 L (being 1000 mL= 1 L)Replacing in the definition of molarity:
[tex]Molarity=\frac{0.1 moles}{1.250 L}[/tex]
Solving:
Molarity= 0.08 [tex]\frac{moles}{liter}[/tex]= 0.08 M
pH of the solutionHydrochloric acid is a strong acid, so in aqueous solution it will be totally dissociated. So the concentration of protons is equal to the initial concentration of acid. This is: [H⁺]= [HCl]= 0.08 M
Replacing in the definition of pH:
pH= - log (0.08 M)
Solving:
pH= 1.0969
Finally, the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H₂O is 1.0969.
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Calculate the concentration of solution containing :
a. 0.2 mole of sodium hydroxide, NaOH, dissolved in water and made up to 100 cm3.
b. 9.8 grams od sulfuric acid, HF, dissolved in water and made up to 500 cm3.
Answer:
the answer for a is 2mol/dm3
Explanation:
n=0.2mol of NaOH
v=100cm3
[tex]v = \frac{100}{1000} \\ v = 0.1 {dm}^{3} \\ concentration = \frac{n}{v} \\ = \frac{0.2}{0.1} \\ = 2mol {dm}^{3} [/tex]
Which compound has the longest carbon-carbon bond length?.
Hokkaido University researchers have synthesized an organic compound with a longer bond between carbon atoms than ever before - exceeding the assumed limit for carbon-carbon single bond (C-C) lengths. The researchers termed it a "hyper covalent bond." The novel polycyclic hydrocarbon named 10c is stable, and an X-ray analysis showed that its C-C bond lengths was as long as 1.806 angstroms, longer than the previously reported world records for hydrocarbons.
Flammable liquids are those that have a flashpoint of:.
Answer:
Flammable liquid is any liquid having a flashpoint at or below 199.4 °F (93 °C).
Explanation:
:)
Flashpoints for flammable liquids are at 100°F. Lower flash points allow for easier ignition of liquids. A liquid's flash point is the lowest temperature at which a concentrated enough layer of vapor accumulates on top of its surface to allow for ignition.
A liquid that is flammable has a flash point* below 37.8 ° C (100 ° F). A flammable liquid has a flash point that ranges from 37.8 to 93.3° C (100 to 200° F), which is above the standard working temperature. Flammable liquids emit a vapor that, at standard working temperatures, is easily ignitable.
The substance ignites more readily the lower the flash point. For instance, petrol is more flammable than ethylene glycol and has a flash point of about -40 degrees C (-40 °F).
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How is permeability related to the size of the grains that make up the sediment?
Answer:
In poorly sorted sediments, those with a larger range of grain sizes, the finer grains tend to fill the spaces between the larger grains, resulting in lower porosity. Primary porosity can range from less than one percent in crystalline rocks like granite to over 55% in some soils.
Explanation:
How will you use simple filter paper to demonstrate chromatography. Show with diagram.
Answer:
1. Draw a pencil line across the filter paper, 1 - 2 cm from the bottom.
2. Use a pipette or capillary tube to add small spots of each ink to the line on the paper.
3. Place the paper into a container with a suitable solvent in the bottom. For example, water. Make sure the water level is below the pencil line.
4. Allow the solvent to move through the paper, but remove the chromatogram before it reaches the top.
5. Allow the chromatogram to dry.
Extras : preferably use a lid to prevent evaporation and use a pencil or any suitable device to prop the paper in place, make sure the sides of the paper doesn't touch the sides of the beaker.
Why does the entropy of a gas increase when it expands into a vacuum?.
Answer:
When a gas expands into a vacuum, its entropy increases because the increased volume allows for greater atomic or molecular disorder. The greater the number of atoms or molecules in the gas, the greater the disorder.
Explanation:
Consider the following reactions Ca(OH)2 + 2NH4Cl - Cacl2 + 2H₂O + 2NH2 a) how many grams of cacl2 will be formed from the if . 1)40 gram of nh4cl?
Answer:
41.495
Explanation:
107 gm of 2NH4Cl gives 111 gm of CaCl2
40 gm of 2 NH4Cl gives =(111*40)/107
=41.495 gm of CaCl2
what are two transition metals in the periodic table?
Answer:
two transitions elements are iron and cobalt
what factors determine the amount of radiant energy we will receive on earth?
What role does sulfuric acid play in the fischer esterification?.
Answer:
It plays the role of a catalyst.
Label the equivalence point on the graph of pH versus volume of the titration of a strong acid and strong base shown below
no bots please!
a. What volume of base was needed to neutralize the acid?
b. What is the pH at the equivalence point?
c. How does the number of moles of hydronium ions and hydroxide ions compare at the
equivalence point?
Suppose that sequence of bases on one segment of DNA is ATCGGA. What is the sequence of the bases on the complementary segment?
is it
A: ATCGGA
B: CGATTC
C: AGGCTA
D: TAGCCT
And why is it one of those that you picked.
Answer:
A: ATCGGA
Explanation:
First, think about which base pairs arise in complementary strands of DNA..
where is the atomic number written
Answer:
The atomic number is written on top of the element symbol.
Explanation:
From top to bottom:
-Atomic Number
-Element Symbol
-Name
-Atomic Mass
~
Does gravity give objects their mass
Answer:
No
Explanation:
Mass affects the amount of gravity that acts on an object.
Answer:
Mass is determined by the quantity of matter in a physical object.
Mass is how much space something takes up, while weight is how much an object is acted on by a force because of gravity.
Explanation:
Gravity does not determine the mass of an object. For example, an object on the Moon would weigh less than it does on Earth because of the lower gravity, but it would still have the same mass. This is because weight is a force, while mass is the property that determines the strength of this force.
identify a human activity that impacts the land negatively then describe a positive action that can help rude effects caused by the activity
giving brainiest
7.744 liters of nitrogen are contained in a container. convert this amount to grams
Answer:
9.69g
Explanation:
Xmol of n2= 7.774/22.4= 0.346 mole
molar mass of n2 2×14 =28g/Mol
Mas of n2= 0.346×28
Mas of n2=9.69grams
A car is accelerating from rest at a rate of 2 (m/s)/ s. How fast will it be going after 4 seconds?
Answer:
8 m/s
Explanation:
The Formula
v = u + at⇒ v = final velocity
⇒ u = initial velocity
⇒ a = acceleration
⇒ t = time taken
Given
u = 0 [rest]a = 2 m/st = 4 sSolving
v = u + atv = 0 + 2(4)v = 8 m/swith a given number of moles of solvent,the solution will always have the same concentration. T or F please explain why.
Answer:
Its False
Explanation:
Its False because the concentartion would have to be the solute the thing being added. BUT if you add the equal amount of solvent and add more solute than the one you added more solute is the more concentarted.
AN EXAMPLE:
An example we have Cup A and Cup B we add the same amount of water to both cups but i add more solute to cup A (Examples of solute Salt,powder) and i add less solute to b I balance them in a balance. and cup A is the most concentrated because It has more solute.
ANOTHER EXAMPLE:
Lets do the same thing i add the same amount of water to cup A and B I want to add the same solute but i cant since Cup A saturates At 8 Spoons And B at 6 So cup A is most concentared
Conclusion:
So it all depends on the solute how much you add or at how many spoons you saturate.
Thats all I hope it helped!!
The concentration of the solution depends upon the number of moles of solute with changing, the concentration will change. Therefore, the given statement is false.
What is the molar concentration?The concentration of the given solution can be determined in the terms of molarity, Normality, and molality. We can easily calculate the molar concentration of a substance in a solution.
In chemistry, concentration can be described as the abundance of a constituent divided by the total volume of a mixture. The concentration can be mass concentration, number concentration, molar concentration, and volume concentration.
The concentration of the solution determined as the number of moles of a solute per unit volume of a solution is known as molarity or molar concentration.
The Molar concentration of a solution is evaluated in the following way.
Molarity (M) of the solution = Moles of solute/Volume of the Solution
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What happens to the density of group 1 when you go down the group
the density increases down the group.
In a constant-pressure calorimeter, the temperature of 60.0 g of water increases by 4.50 °C.
What amount of heat is transferred to the water? (Specific heat capacity of water = 4.2 J/gºC)
O A. 7.88 KJ
द
OB. 1.13 KJ
O C. 1.13 J
o D. 7.88 J
The amount of heat transferred to the water if the temperature of 60.0 g of water increases by 4.50 °C is 1.134Kj.
How to calculate heat?The quantity of heat transferred to a substance can be calculated using the following formula:
Q = mc∆T
Where;
Q = quantity of heat (J)m = mass of substancec = specific heat capacity∆T = change in temperatureAccording to the information in this question;
Q = ?m = 60gc = 4.2J/g°C∆T = 4.5°CQ = 60 × 4.2 × 4.5
Q = 1134J
Therefore, the amount of heat transferred to the water if the temperature of 60.0 g of water increases by 4.50 °C is 1.134KJ.
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a solution with a pH of 4.6 is a:
1. In sheep, a gene with two alleles decides wool color. The allele for white wool is
dominant to the allele for black wool. If two heterozygous sheep mate, what
percentage of the sheep will have white wool? Record your answer as a
percent.
White wool
Black wool
HINT: Create a Punnett square on scratch paper to determine the answer.
This is defined as a variant form of a gene. We were told that allele for white wool is dominant to the allele for black wool and two heterozygous sheep mated.
When we cross Ww and Ww we get WW, Ww, Ww, ww. Since white is dominant then the percentage is 3/4 = 75 percent.
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2. Describe one way in which each of the items you listed in Part 1 could be at
least temporarily disrupted from equilibrium. Can you think of a way your body
could respond to restore homeostasis after one of these disruptions? (3 points)
An example of a temporary disruption from equilibrium is a temperature change, this would be compensated through sweating.
What is equilibrium?This refers to a constant state in which forces are balanced. Inside the body, equilibrium means certain conditions such as the level of oxygen or the temperature are constant.
How is equilibrium lost?This can be lost due to many factors, in the body, this occurs as a result of sudden changes either inside or outside the body. An example of this is sudden temperature changes, for example, if you go out of your house and it is snowing or it is very hot outside.
How is homeostasis or equilibrium restored?The body has specific mechanisms to restore the temperature. For example, if the environmental temperature is too high the body uses sweating to keep a constant temperature.
Note: This question is incomplete because the list of part 1 is not given; due to this, the answer is based on general knowledge.
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Answer: describe in general a process desert plants might need to carry out in order to maintain homeostasis
Explanation:
What is the name of the molecule shown below?
A.2-octene is the name of the molecule shown below.
How many carbons does 2-octene have?The oct part of the name indicates the parent chain. In this case, oct- is an abbreviation for octane, which means that there are 8 carbons in the parent chain. The first part of the name, cis-2. 2 is used to indicate the first atom that forms the double bond above.
Alkenes are classified into higher olefins and alpha olefins. This means that the double bond is in the alpha (primary) position, which makes the compound more reactive and provides useful chemistry.
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Which of the following is the molecule with the highest number of covalent bonds?
1. O2
2. N2
3. NH3
4. CO2
Answer:
N2 and NH3 both have 3 so try one of those ones
_____AI(NO3)3 + _____NaOH —> ___Al(OH)3
+ _____NaNO3
Answer:
Al(NO3)3 + 3NaOH -----> Al(OH)3 + 3NaNO3
What is a technique for gene therapy?
Answer:
For gene therapy, stem cells can be trained in a lab to become cells that can help fight disease. Liposomes. These fatty particles have the ability to carry the new, therapeutic genes to the target cells and pass the genes into your cells' DNA.
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What is the density of a substance with a volume of 5.0 mL and a mass of 15.0g?
A.) .33 g/mL
B.) 3.0 g/mL
C.) 10.0 g/mL
D.) 20.0 g/mL
Answer:
B) 3.0 g/mL
Explanation:
density formula: mass/volume
15/5=3
which of the following is lewis acid a. Bacl. b.kcl c.Becl2 d.Licl
Answer:
becl2
Explanation:
because
a it has incomplete outer
b it accept electron pair