Therefore, the pH of the solution is -9 + log([HBr]/[HBr]) = -9 + log(1) = -9.
What is solution?Solution is a term used to describe the answer or resolution to a problem, challenge, or inquiry of some kind. It is an act or means of solving a problem or reconciling differences. A solution may also involve setting a goal or plan of action to reach the desired outcome. Solutions are often creative and require collaboration from multiple individuals or groups. Solutions can also be found in the form of products, services, or information.
The pH of a HBr solution can be found by using the Henderson-Hasselbalch equation, which states that pH = pKa + log([salt]/[acid]). In this case, the pKa of HBr is -9 and the molar concentration of HBr is [HBr].
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Please help with these two (last question is nwse)
Answer:
your answer gonna be 20 miles
1. What do gram-formula mass and atomic mass have in common? How are they different?
Do the chemical bonds between atoms change during cellular respiration?
Which a balanced chemical equation ? O C 7 H 16 +5O 2 6CO 2 +4H 2 O OB C 7 H 16 +11O 2 7CO 2 +8H 2 O C 7 H 16 +14O 2 7CO 2 +5H 2 O OD . C 7 H 16 +22O 2 14CO 2 +16H 2 O
Answer: [tex]C_7H_{16}+11O_2\rightarrow 7CO_2+8H_2O[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The balanced chemical equation is:
[tex]C_7H_{16}+11O_2\rightarrow 7CO_2+8H_2O[/tex]
An ball with a weight of 0.5 kg is sitting on a shelf that is 3 meters high. Help me! This is 8th grade sci btw.
Complete question:
A ball with a weight of 0.5 kg is sitting on a shelf that is 3 meters high. What is the gravitational potential energy of the ball ?
Help me! This is 8th grade sci btw
Answer:
the gravitational potential energy of the ball is is 14.7 J.
Explanation:
mass of the ball, m = 0.5 kg
height above the ground on which the ball is sitting, h = 3 m
The gravitational potential energy of the ball is calculated as follows;
P.E = mgh
P.E = 0.5 x 9.8 x 3
P.E = 14.7 J
Therefore, the gravitational potential energy of the ball is is 14.7 J.
I am doing a break-out room and it won't let me pass I think I have all the other questions correct so this is the only one I'm not sure about.
1. figure one
2. figure two
3. figure three
4. figure two
5. figure one
Answer:
it goes A,C,B,C,A
Explanation:
What is the mass of 5.6 moles of Iron (III) Oxide?
Answer:
312.731
Explanation:
it had a long answer but im sure ur teacher wanted u to round it
hope this helps!
~goldfishareswag/brianna
:)
Why the colloid can't be filitred?Write it's 4 examples.
Answer:
Constituent substances of a colloid cannot be separated by ordinary filtration because the size of the particles in a colloid (or colloidal solution) is bigger than those in a true solution but smaller than those in suspension. It is between 1 nm to 100 nm in diameter.
ex- cheese, milk, aerosol spray, mayonnaise
There are moles of carbon present in 100 g of a
compound with the following percentage composition:
C= 40.0%, H = 6.72%, O = 53.29%.
Answer: 3.33
Explanation:
The molecular formula of the given composition is C₃H₆O₃.
What is molecular formula?Molecular formula is defined as a compound's chemical formula, which counts the total number of each element present in a molecule of the compound as discrete molecules. The arrangement of atoms in a molecule in three dimensions is known as molecular geometry, commonly referred to as the molecular structure.
The percentage composition is
C = 40.00 %
H = 6.72 %
O = 53.29 %
Mole = 100 g
Mass of C = 40 / 100 x 100 = 40 g
mass of H = 6.72 / 100 x 100 = 6.72 g
Mass of O = 53.29 / 100 x 100 = 53.29 g
Dividing the mass with moles
C = 40 / 12 = 3.3
H = 6.72 / 1 = 6.72
O = 53.29 / 16 = 3.3
Formula = C₃H₆O₃
Thus, the molecular formula of the given composition is C₃H₆O₃.
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How many grams of glycerine, C3H8O3, are needed to make 100. mL of 2.60 M solution?
Answer:
the mass of the glycerine needed in the given solution is 23.92 g
Explanation:
Given;
molarity of the solution (C₃H₈O₃), C = 2.60 M
Volume of the solution, V = 100 mL = 100 x 10⁻³ L = 0.1 M
The molarity of a solution is given as follows;
[tex]Molarity = \frac{amount \ of \ solute \ (moles)}{volume \ of \ solution \ (L)} \\\\amount \ of \ solute \ (moles) = Molarity \ \times volume \ of \ solution \ (L)\\\\amount \ of \ solute \ (moles) = 2.6 \times 0.1 \\\\amount \ of \ solute \ (moles) = 0.26 \ mole[/tex]
The molecular mass of the given solution;
molecular mass = (12 x 3) + (8 x 1) + (16 x 3)
molecular mass = 92 g/mol
The mass of the glycerine needed in the given solution is calculated as follows;
reacting mass = amount of solute (moles) x molecular mass (g/mol)
reacting mass = 0.26 x 92
reacting mass = 23.92 g
Therefore, the mass of the glycerine needed in the given solution is 23.92 g
which shows how much electron is in the outer layer
Answer:
is there a picture or is it multiple choice?
Which of the following answers below is the correctly balanced half-reaction for the reduction of the SO4 ^-2 ion in acid solution? The answer is C, but I don’t understand why. Thanks in advance :-)
Answer:
C
Explanation:
The oxidation number of Sulphur in SO4^2- is;
x + 4(-2) = -2
x - 8 = -2
x = -2 + 8
x = 6
Now,
the oxidation number of sulphur in H2SO3 is
2 (1) + x + 3(-2) = 0
2 + x -6 = 0
-4 + x = 0
x = 4
Hence, the oxidation number of sulphur changed from +6 to +4 which signifies gain of two electrons as shown in option C.
If you observe a Full Moon on January 12th, on what date would you observe the next New Moon?
January 19
Explanation:
every first 7 days of a month the moon roughly starts its full moon phase
Phenolphthalein indicator is??
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. It belongs to the class of dyes known as phthalein dyes.
Hope it helps!
mark me brainliest pls....
Follow me! :)
Acid HX has a very large Ka. How will the relative amounts of H+ and HX
compare at equilibrium?
A)The concentration of H+ will be larger than HX
B)The concentration of HX will be larger than H+
C)The concentration of HX will be equal to H+
Can you help me please..
Answer:
Using Charles law of Gas
Explanation:
Light is a type of energy produced by the vibration of electrically charged particles.
True or false?
Answer:
big brain
Explanation:
Those microscopic organisms perform what 2 processes that help pave the way for lichen by creating organic material.
Answer:
Decomposition pf residues and weathering of rock.
Explanation:
Microorganisms performs two processes such as decomposition and weathering of rock materials. These two processes make the medium suitable for the growth and development of the lichens because these processes increases nutrient and organic matter on the rock surface that is used by the lichens for its growth. In decomposition process, larger compounds are broken down into simpler substances while on the other hand, the weather of rocks causes breakdown of rock material into simpler minerals that also used by the lichens.
NO FILES OR LINKS PLEASE HELPPPP IVE ASKED THIS 3 TIMES AND ALL I GET IS SCAM FILES ILL GIVE YOU BRAINLIEST PLEASE
What is the skeleton equation for
CuSO4 + 2NaOH → Cu(OH)2 + Na2SO Copper sulfate + Sodium hydroxide --> copper hydroxide + sodium sulfate
Answer:
*Inserting real answer*
Explanation:
I think CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4 is the skeleton equation.
If I am wrong I am so sorry!!!
Have a nice day! :)
Also sorry for all the fake answers you have been getting that happened to me too TnT
1.9x10^23 atoms of sulfur to grams of sulfur
Answer:
see explanation and punch in the numbers yourself ( will be better for your test)
Explanation:
If you are given atoms you need to divide by Avogadro's number 6.022x10^23
then you will have moles of sulfur-- once you have moles multiply by the molar mass of sulfur to go from moles to grams
mm of sulfur is 32 g/mol
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the grams of sulfur in 1.9x10²³ atoms of sulfur is 9.92g.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance.
Given number of atoms= 1.9x10²³atoms
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
Substituting the values
mole=1.9x10²³÷ 6.022×10²³
mole = 0.31 mole of sulfur
Mole = given mass÷ Molar mass
Molar mass of sulfur=32g/mol
mass of sulfur =0.31 mole ×32g/mol
mass of sulfur=9.92g
Therefore, the grams of sulfur in 1.9x10²³ atoms of sulfur is 9.92g.
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How many moles of HCl are present in 1.30 L of a 0.50 M solution
0.50 moles
3.00 moles
O 0.65 moles
0 1.50 moles
Answer:
0.65moles of HCl was produced
If 335 g water at 35.5C loses 5750 J of heat, what is the final temperature of the water?
Answer:
The final temperature is 39.58 degree Celsius
Explanation:
As we know
Q = m * c * change in temperature
Specific heat of water (c) = 4.2 joules per gram per Celsius degree
Substituting the given values we get -
5750 = 335 * 4.2 * (X - 35.5)
X = 39.58 degree Celsius
I NEED THIS LESS THAN 7 MINUTES IYS 15 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! What is the difference between a balanced equation and an unbalanced equation?
All of the answers are correct.
A balanced equation obeys the law of conservation of mass, an unbalanced equation does not. An unbalanced equation shows the conservation of mass.
Balanced equations do not show equal numbers of atoms on each side of the equation.
Answer:
Balanced equation have equal number of atoms of different elements in the side of reactants and products.
Answer:
- A balanced chemical equation has an equal numbers of atoms of different elements in the side of reactants and products.
- An unbalanced chemical equation has an unequal number of atoms of one or more elements in the reaction.
Explanation:
Why must the mass of reactants in a chemical reaction
always equal the mass of products?
Answer:
law of conservation
Explanation:
matter cannot be destroyed nor made
Convert 18.6 L of neon gas at STP to atoms.
1.What is the coefficient of the scientific notation answer? 2.What is the exponent of the scientific notation answer? 3.How many significant figures are there in the answer?
4.What is the right most significant figure in the answer ?
Answer:
See explanation
Explanation:
1 mole of Ne occupies 22.4 L
x moles of Ne occupies 18.6 L
x = 1 mole * 18.6 L/22.4 L
x = 0.83 moles
1 mole contains 6.02 * 10^23 atoms
0.83 moles occupies 0.83 moles * 6.02 * 10^23 atoms/1 mole
= 4.9966 * 10^23 atoms = 5.0 * 10^23 atoms
the coefficient of the scientific notation answer =5.0
the exponent of the scientific notation answer = 23
significant figures are there in the answer = 5
the right most significant figure in the answer = 1
how do particles differ after a physical change?
Answer:
They are still the same particals just. packed together diffrently depending on what stae of matter it's in.
Explanation:
neeeeeeeed help with science
Answer: should be 28 degrees
Explanation:
A book is pushed and released and it slides across a table for a short distance. The book quickly comes to a stop. The book originally
has kinetic energy. To what form of energy is the kinetic energy transformed?
A)
The kinetic energy is transformed into heat.
B)
The kinetic energy is transformed into chemical energy.
C)
The kinetic energy is not transformed into any other type of energy.
Eliminate
D)
The kinetic energy is transformed into electrical energy.
Law of Conservation of Energy
(58P2.c) Energy Transformation
D 149628
Regular Cals
Scientific Cals
My
Answer:
A
Explanation:
The book encountered friction which turned some of the energy into heat.
Can someone please help
Answer:
5.
A. Period
B. Group
6. C
Explanation:
How many grams of KCl are made when 5.02 moles of
ZnCl2 react in the reaction below?
2KMnO4 + ZnCl2 → 2KCl + Zn(MnO4)2
lol pls help me
Answer: 747.98 grams of KCl are made when 5.02 moles of [tex]ZnCl_2[/tex] react in the reaction.
Explanation:
The balanced chemical equation is:
[tex]2KMnO_4+ZnCl_2\rightarrow 2KCl+Zn(MnO_4)_2[/tex]
According to stoichiometry:
1 mole of [tex]ZnCl_2[/tex] produce = 2 moles of [tex]KCl[/tex]
Thus 5.02 moles [tex]ZnCl_2[/tex] will produce =[tex]\frac{2}{1}\times 5.02=10.04[/tex] moles of [tex]KCl[/tex]
Mass of [tex]KCl=moles\times {\text {molar mass}}=10.04mol\times 74.5g/mol=747.98g[/tex]
Thus 747.98 grams of KCl are made when 5.02 moles of [tex]ZnCl_2[/tex] react in the reaction.