Answer:
[A⁻] = 0.067 M
Explanation:
In this case, let's see what happen in the mixture of the acid.
As we can see we have a strong acid and a weak acid, at the same concentration. so the moles would be the same:
moles HCl = moles CH₃COOH = 0.1 moles/L * 0.1 L = 0.01 moles
Now, the moles of the base would be:
moles NaOH = 0.1 * 0.050 = 0.005 moles
As the base is a strong base, it will react first with the strong acid, in this case, HCl as given:
NaOH + HCl --------------> NaCl + H₂O
i. 0.005 0.010 0 0
c. -0.005 -0.005 +0.005 +0.005
e. 0 0.005 0.005 0.005
The base reacts completely with the strong acid, leaving the CH₃COOH completely in solution, so:
CH₃COOH + NaOH -------------> CH₃COONa
i. 0.01 0 0
e. 0 0 0.01
So, the [A⁻] would be the [CH₃COONa]:
[A⁻] = 0.010 / (0.1 + .050)
[A⁻] = 0.067 MHope this helps
Which of the following is NOT part of our blood?
a
plasma
b
white blood cells
c
vessels
d
red blood cells
e
platelets
Answer:
c good luck with the answer
Answer:
Platelets
Explanation:
Those are there to heal any wounds to keep the blood from leaking through. So if you ever stop bleeding, thats why
45.5 g of ice is heated from -25 degrees celsius to 150 degrees celcius. Calculate the total amount of heat required for the entire process
Answer:
Q = 16163.88 Joules
Explanation:
Given the following data;
Initial temperature, T1 = -25°C
Final temperature, T2 = 150°C
Mass = 45.5 g
Specific heat capacity of ice = 2.03 J/g°C
To find the quantity of heat required;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
dt = T2 - T1
dt = 150 - (-25)
dt = 150 + 25
dt = 175°C
Substituting into the formula, we have;
[tex] Q = 45.5 * 2.03 * 175 [/tex]
Q = 16163.88 Joules
Which of the following substance has the highest concentration of hydrogen ions in solution
A bleach
B water
C tomato juice
D vinegar
Assertion: The Nitrogen atom loses its 3 valence electrons to form its ion
Reason: Nitrogen ion is an anion
(a) Both assertion (A) and Reason (R) are true, and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and Reason (R) are true, but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true, but reason (R) is false.
(d) Assertion (A) is false, but reason (R) is true
Define Ductility.
_____________
Answer:
the property of metal which can be bitten in a thin wire by hitting is defined as ductility.
The ability of a material to deform itself without any fracture is known as ductility for example the plastic bag- we can deform it without breaking it- The term is ductility is used to check how ductile a material or metal is in order to give them desirable and acceptable shape!
What's the difference between a wax crayon and a plastic crayon?
Answer:
Crayons use wax and Oil pastels use non-drying oil and wax. Besides the composition of the colours, there is a huge difference in how a wax crayon and an oil pastel works. ... Crayons, don't colour your hands. Well, most crayons don't.
Explanation:
what's crayons are softer and they smudge because they have more oil pastels in them plastic crayons are harder and they don't intend to smudge.
name two other substances with giant covalent structures
Answer:
Diamond and graphite forms of carbon, silicon dioxide (silica)
thenks and mark me brainliestt pls :))
Answer:
Diamond and graphite forms of carbon) and silicon dioxide (silica) are examples of giant covalent structures (lattices) of atoms. All the atoms in these structures are linked to other atoms by strong covalent bonds and so they have very high melting points.
Why are organisms given a universally accepted name?
How many grams of KI would you need to prepare 0.50 g of 7.0% KI (m/m) solution?
Answer:
fomula; ( x = mutiplacation btw)
% m/m = m(solute) / m(solution) x 100%
0.50g x 70% = m/m x 100%
0.5g x 70% / 100% = 3.5 g KI
(both % cancle each other)
Explanation:
heads up might be wrong i did it myself
I need help everyone
Answer:
The answer is D
The last one
Chemical symbols stand for?
Answer Explanation:
If it is like H, or O or N or Na or Cl, those are the elements. Those are on the Periodic table. pH is the acidity and basicity of a substance, how acidic or basic(caustic) it is. mol is Moles. kPa is kilopascals. STP is standard temperature and pressure, at 0*C(Celsius), or 273.15 K(Kelvin), and 101,325 pascals, or 101.325 kilopascals.
Avagadro's Number is 6.022x10^23, the number of atoms in a mole. The Ideal Gas Law is P(Pressure in kPa) times V(Volume in L, liters) equals n(number of moles of gas) times R(the universal gas constant, or 8.3145 (L kPa/K mol) or 8.3145 liters kilopascals per Kelvin mole. that is just a few of them.
One of the following properties was originally used to arrange elements on the periodic table, but is no
longer used to organize the modem version. Which property fits this description?
atomic number
O atomic mass
chemical properties
Answer:
atomic mass
Explanation:
A British chemist named John Newlands organized the elements known at that time into a system of periodicity based on an order of increasing atomic masses.
In his table, it was found that every eight elements had similar properties. He called this observation the law of octaves.
Currently, the periodicity of elements is based on increasing atomic numbers and this is generally called the modern periodic law.
Pls help.............
8.) If 396 g of Carbon Dioxide (CO2) are produced, what mass of Oxygen
(02) reacted? *
1 C3H3 + 5 O2 → 3 CO2 + 4 H20
Answer:
480 g of oxygen.
Explanation:
C3H8 + 5O2 ---> 3CO2 + 4H2O
Using the molar masses:
3*12 + 6*16 g of CO2 were formed from 10*16 g O2
132g g CO2 from 160 g O2
1g CO2 from (160/132) g O2
396 g from (160/132) * 396
= 480 g of oxygen.
1
50.0 grams of an unknown metal is heated to 100.0°C and then placed in a calorimeter with 250.0 mL of water. If the final temperature of the
metal is 29.1°C and the calorimeter absorbed 824 Joules of energy, what
is the specific heat of the unknown metal? *
Explain the concept of molar mass.
If the salt created from the reaction of a strong acid and a weak base is added to a solution, what will happen to the solution
Answer:
See Explanation
Explanation:
When a salt is dissolved in water, the solution could be acidic, basic or neutral depending on the nature of acid and base from which the salt was formed.
When a salt is formed from a strong acid and a weak base, the salt solution is acidic.
For instance, NH4Cl is a salt formed from NH3 which is a weak base and HCl which is a strong acid. The salt hydrolyses as follows;
NH4^+(aq) + H2O(l) ------> H3O^+(aq) + NH3(aq)
Hence an acidic solution is formed.
What mass of copper metal will be formed when excess magnesium metal is reacted with:
(a) 250.0 mL of a 1.0 M copper M chloride solution (b) 100.0 mL of a 0.25 M copper (II) chloride solution
Answer:
A
Explanation:
When you find the gram formula mass, the results should be in *
Help me out ;/
Answer: g/mol
Explanation:
The gram formula mass of CuSO 4 is 159.60 g/mol
Multiply the subscript for each element by its molar mass (atomic mass on periodic table in g/mol). Then add the results. This will give you the molar mass of the compound (mass of 1 mole).
Cu : ( 1 × 63.546 g/mol ) = 63.546 g/mol
S : ( 1 × 32.065 g/mol ) = 32.06 g/mol
O : ( 4× 15.999 g/mol ) = 63.996 g/mol
CuSO 4 : 63.546 g/mol + 32.06 g/mol + 63.996 g/mol = 159.60 g/mol (rounded to two decimal places)
4.A high-quality sleeping bag will keep you warm even during a winter camping trip high in the mountains. How do you stay warm when the air around you is very cold?
A. The sleeping bag produces thermal energy that keeps you warm.
B. The sleeping bag transfers thermal energy from the air to your body.
C. The sleeping bag slows the transfer of thermal energy produced by your body into the air.
D. The sleeping bag increases the production of thermal energy by your body
Answer:
I think it's C
Explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
How many moles are in 25.0 grams of KMnO4?
0.124 mol KMnO4
0.158 mol KMnO4
0.199 mol KMnO4
0.316 mol KMnO4
Answer:
158 mol :)
Explanation:
SOMEBODY PLEASE HELP ME ASAP. WILL GIVE BRAINLIEST TO BEST ANSWER.
Answer:
135.80 g of Ag
Explanation:
[tex]40gCu *\frac{1mol Cu}{63.546g Cu} *\frac{2mol Ag}{1molCu} *\frac{107.868g Ag}{1mol Ag}[/tex]
~ 135.80 g of Ag
Which statement about noble gases is correct? *
They are extremely rare in nature.
They are highly reactive with both metals and nonmetals.
O They exist as single atoms rather than as molecules.
O They form compounds with very bright colors.
Answer:
Hello There!!
Explanation:
I believe the answer is O They form compounds with very bright colors.
hope this helps,have a great day!!
~Pinky~
The statement about noble gases that is correct is D. They form compounds with very bright colors.
Noble gases simply refers to the elements that have similar properties. Noble gases are colorless, odorless, and have very low reactivity.
Examples of noble gases are helium, argon, Krypton, xenon, etc. Noble gases also form compounds with very bright colors.
In conclusion, the correct option is D.
Read related link on:
https://brainly.com/question/24070118
Two mice have different parents. They both have the same protein for whisker thickness in their cells.
Answer:
Due to presence of similar protein.
Explanation:
The two mice are different from one another due to their different parents so in that way the physical features of both mice are different from one another. Both mice have the same protein for whisker thickness in their cells that leads to same whisker in both mice. The common feature in both mice are the protein that is responsible for whisker thickness so both have same whisker on their face.
How much total time was required to boil this substance after it reached its melting point?
Question 4 options:
a)
2 min
b)
5 min
c)
10 min
d)
15 min
Answer:
c
Explanation:
If the temperature of 1000 mL of gas is changed from -86oC to 101oC. What is the approximate final volume?
Answer:
2000 mL
Explanation:
We have the following data:
Initial volume: V₁ = 1000 mL
Initial temperature: T₁ = -86°C + 273 = 187 K
Final temperature: T₂= 101°C + 273 = 374 K
According to Charles' law, as the temperature of a gas is increased at constant pressure, the volume is increased. That is expressed mathematically as:
V₁/T₁ = V₂/T₂
Thus, we calculate the final volume V₂ as follows:
V₂ = V₁/T₁ x T₂ = (1000 mL)/187 K x 374 K = 2000 mL
Therefore, the final volume is 2000 mL.
Can someone pleasee help me with this asap!! Im struggling
4a. D - The last number in the configuration represents the group, in this case 3, and the number of shells represent the period, which is also 3.
4bi. Rubidium metal reacts very rapidly with water to form a colourless solution of rubidium hydroxide (RbOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is very exothermic and explosive.
4bii. Lithium is smaller in size than potassium . so valence electrons are more tightly held in Li than K. Due to larger size of K the valence electrons are loosely held and easy to remove the electron from K. Hence K is more reactive.
Raising the temperature of reactants in a system Select one: a. increases the average kinetic energy of the molecules. be. decreases the average kinetic energy of the molecules. c. decreases the rate of collision of molecules. d. has no effect on the average kinetic energy of molecules. Clear my choice Check
Answer:
A, increases the average kinetic energy of the molecules
Explanation:
temperature is a measure of the average kinetic energy of particles (atoms, ions and molecules), if one raises the temperature, one is raising the average kinetic energy of the particles.
In the lab jill mixed 3 gases together. The resulting pressure was 930 mmHg carbon dioxide had a partial pressure of .70 atm and oxygen had a partial pressure of 680 mmHg. What is the partial pressure of nitrogen in kPa
Answer:
26.2kPa is the partial pressure of nitrogen
Explanation:
Assuming the partial pressure of Carbon dioxide is 0.070atm
The total pressure of a mixture of 3 gases (CO2, O2 and N2) is:
Total pressure = Partial pressure CO2 + Partial pressure O2 + Partial pressure N2
0.070atm CO2 are:
0.070atm * (760mmHg / 1atm) 53.2mmHg
Replacing:
930mmHg = 53.2mmHg + 680mmHg + Partial pressure N2
Partial Pressure N2 = 196.8mmHg
In kPa -101.325kPa = 760mmHg-
196.8mmHg * (101.325kPa / 760mmHg) =
26.2kPa is the partial pressure of nitrogenMegan rolls a ball down a ramp until the ball hits a wall. The ramp is 2.5 m long and the distance from the end of the ramp to the wall is 1.5 m. If it took .5 sec for the ball to hit the wall then what is the ball’s speed?
Answer the following-
Solving for:
Equation (with words):
Work (with numbers):
Answer w/ units:
Answer:
Solving for: Speed
Equation (with words): S = d / t
Work (with numbers): S = 4 / 0.5
Answer w/ units: 8 m/s