Answer:
Therefore, the hydrogen ion concentration of the hydrofluoric acid solution = 6.67 × 10-¹⁰ M
Explanation:
The product of hydroxide ion concentration and the hydrogen ion concentration of a solution is given by the ionic product of pure water and is constant for all solutions.
The ionic product of water, Kw = [H+] × [OH-] = 1 × 10-¹⁴ M²
Where [H+] is the hydrogen ion concentration; [OH-] is the hydroxide ion concentration
For the hydrofluoric acid solution, the hydroxide ion concentration, [OH-] = 1.5 × 10-⁵ M
Since [H+] × [OH-] = 1 × 10-¹⁴
[H+] = 1 × 10-¹⁴ / [OH-]
[H+] = 1 × 10-¹⁴ M² / 1.5 × 10-⁵ M
[H+] = 6.67 × 10-¹⁰ M
Therefore, the hydrogen ion concentration of the hydrofluoric acid solution is 6.67 × 10-¹⁰ M
Hello ! Pls help, i'm really confused T-T 29.0 grams of H2CO3 are dissolved in enough water to make 700.0 mL of solution. A. 0.468 L B. 0.468 moles/liter C. 62.02 g/mole D. 0.668 L E. 0.668 M
Answer:
Explanation:
Molecular weight of H₂CO₃ = 2 + 12 + 48 = 62
29 g of H₂CO₃ = 29 / 62 moles
= .4677 moles
.4677 moles are dissolved in .7 L
molarity of solution = .4677 / .7
= .668 M .
So solution formed is .668 M .
Option E is correct .
Please help me out!!!
Larissa is making sautéed purple cabbage. First, she washes and cuts the cabbage into long thin strands. Then, she puts a pan on the stove and adds butter. She allows the butter to melt and turn to liquid. Next, she adds the cabbage to the butter, sprinkles some salt on it, and stirs it. Larissa watches as the cabbage sizzles, releases steam, and softens. To finish the side dish, she adds a squeeze of lemon juice to it, which causes it to change from purple to pink. Finally, Larissa empties the cabbage into a bowl and puts it on the dinner table.
Which of the events involves a chemical reaction?
Larissa washes and cuts some purple cabbage into long thin strands.
Larissa adds the cabbage to the butter with a sprinkle of salt and stirs it.
Larissa adds butter to a pan and allows it to melt and turn to liquid.
Larissa adds a squeeze of lemon juice to the cabbage, and it turns pink.
Larissa empties the cabbage into a bowl and puts it on the dinner table.
Larissa watches as the cabbage sizzles, releases steam, and softens.
Answer:
what even is the question?
The mole fraction of helium in a saturated solution at 0°C is 1.2 x 10–6. Find the pressure of helium above the solution. Henry's law constant is 6.8 x 10–6 atm–1
Answer:
[tex]P=5.67atm[/tex]
Explanation:
Hello there!
In this case, since the Henry's law is shown below:
[tex]P=H/x[/tex]
Whereas x is the mole fraction, H the Henry's constant and P the pressure. In such a way, we plug in the aforementioned first two to obtain the corresponding pressure:
[tex]P=\frac{6.8 x 10^{-6} atm^{-1}}{1.2 x 10^{-6}} \\\\P=5.67atm[/tex]
Regards!
How do gas particles respond to an increase in volume?
When the volume of a gas is increased, the gas particles respond by spreading out and occupying a larger space. This results in a decrease in the density of the gas and a decrease in the frequency of collisions between the gas particles.
How do gas particles respond to an increase in volume?As the gas particles spread out, the pressure exerted by the gas decreases.
This is because the pressure of a gas is directly proportional to the number of collisions per unit area of the container walls. When the volume increases, the same number of gas particles are distributed over a larger area, reducing the frequency of collisions and thus decreasing the pressure.
In summary, an increase in volume causes gas particles to spread out, resulting in a decrease in density and a decrease in pressure.
Learn more about volume at
https://brainly.com/question/14197390
#SPJ6
¿Cómo se llama el grupo IIA de la tabla periódica?
Answer:
los metales alcalinotérreos: berilio (Be), magnesio (Mg), calcio (Ca), estroncio (Sr), bario (Ba) y radio (Ra).
o simplemente llamado grupo 2A
Explanation:
Which form of emission is commonly not written in nuclear equations because they do not affect charges, atomic numbers, or mass numbers?
alpha particle
beta particle
gamma ray
Answer: It is Gamma ray
Answer:
C. gamma ray
(Photo for proof at the bottom.)
Explanation:
A gamma ray is a type of radiation that occurs when an unstable nucleus emits a photon, the smallest unit of light. A photon has no mass or charge. Atomic and mass numbers are written based on the mass of the atom. But since no mass is lost when a photon is emitted, writing the emission of it isn't necessary.
Here's a photo of Edge, good luck.
Brakes are to a car as
to a nuclear-fission chain reaction.
A. fuel rods are
B. proliferation is
C. free neutrons are
D. control rods are
Answer:
D. control rods are
I hope dis helps :3
Brakers are to a car as control rods are to a nuclear-fission chain reaction. The correct option is D.
What is a nuclear-fission chain?A chain reaction occurs when neutrons generated during fission cause subsequent fission in at least one more nucleus.
This nucleus creates neutrons, and the cycle continues.
The process can be either controlled (nuclear power) or uncontrolled (nuclear weapons) (nuclear weapons).
Thus, the correct option is D. control rods are.
Learn more about nuclear-fission chain
https://brainly.com/question/24297620
moles of H2O are needed to exactly react with 2.0 moles of Ca
Answer:
4
Explanation:
so first write the balance equation
Ca+2H2O---->Ca(OH)2 + H2
then use molar ratio of H2O and Ca
which is 2:1 so if there are 2 moles of ca there will be 4 moles as you times it by 2. like this
Ca:H2O
1:2
2:4
Hope this helps u understand:)
Hi can someone who know the answers tell me what it is and pls don't send me a link also don't send me the wrong answers if you don't know it's ok :)
Answer:
you diba ikaw ang nagpamalimali diba no
Four satellites are in orbit around the Earth. The heights of their four orbits
are identical. The masses of the four satellites are given in the table. For
which satellite is the gravitational pull of Earth the strongest?
Help me please!!!!!!!
Answer:
The answer is A
Explanation:
Consider the chemical equation. 2NBr3 + 3NaOH Right arrow. N2 + 3NaBr + 3HOBr If there are 40 mol of NBr3 and 48 mol of NaOH, what is the excess reactant?
Answer:
NBr₃ is the excess reactant.
Explanation:
2NBr₃ + 3NaOH → N₂ + 3NaBr + 3HOBrWe can solve this problem by calculating how many moles of NaOH would react completely with 40 moles of NBr₃, using the stoichiometric coefficients of the reaction:
40 mol NBr₃ * [tex]\frac{3molNaOH}{2molNBr_3}[/tex] =60 moles NaOHAs the required number of NaOH moles is higher than the available number (60 required vs 48 available), NaOH is the limiting reactant.
As such, the excess reactant is NBr₃.
How would you find the density of a can of soda pop?
A. Find the mass of the can of soda pop and then multiply by the number of cubic centimeters in the can
B. Find the mass of the can of soda pop and then divide by the number of cubic centimeters in the can
C. Convert a gallon into cubic centimeters and then divide by the mass of the can of soda pop
D. Convert a gallon into cubic centimeters and then subtract the mass of the can of soda pop
Answer:
it's A.
Explanation:
have uh good day ma :)))))))
This unbalanced equation represents a chemical reaction:
Pb(NO3)2 + Nal NaNO3 + PbI2
What is the coefficient for Nal once the equation is balanced?
Α. 1
B. 2
C. 3
D. 4
Answer:
2
Explanation:
Pb(NO3)2 + 2NaI 2NaNO3 + PbI2
To see the coefficients of NaI in the given reaction we need to balance the reaction first. The coefficient for Nal once the equation is balanced is 2. the correct option is option B.
What is balanced equation?Balanced equation is the one where the number of atoms of each species is same on reactant and product side. In balanced equation mass can neither be created nor be destroyed.
The unbalanced equation is
[tex]\rm Pb(NO_{3})_{2}+ Nal\rightarrow NaNO_{3} + PbI_{2}[/tex]
The atoms of Pb on reactant and product side is 1 so Pb is balanced.
The atoms of N is 2 on reactant and 1 on product side so balance it as
[tex]\rm Pb(NO_{3})_{2}+ Nal\rightarrow 2 NaNO_{3} + PbI_{2}[/tex]
The atoms of O is 6 on reactant and 6 on product side so it is balanced
The atoms of I is 1 on reactant and 2 on product side so balance it as
[tex]\rm Pb(NO_{3})_{2}+2 Nal\rightarrow 2NaNO_{3} + PbI_{2}[/tex]
The atoms of Na on reactant and product side is 2 so Na is balanced.
Now all the elements are balanced
Therefore, the coefficient for Nal once the equation is balanced is 2. the correct option is option B.
Learn more about the balanced equations, here:
https://brainly.com/question/7181548
#SPJ2
An atom has the following electron configuration 1s2s2sp63s23p64s2 How many valance electrons does this atom have?
Answer:
The electron configuration for this atom is Calcium, which has 2 valence electrons.
Explanation:
Following the periodic table and with the electron configuration, you will end up with calcium, which has 2 valence electrons. (Always follow the electron configuration from left to right! It begins at hydrogen, then to helium... and so on.)
1s2 -> He....
2s2 -> Be....
2p6 -> Ne...
3s2 -> Mg...
3p6 -> Ar...
4s2 -> Ca.
What will the change in temperature be when 90 J are applied to 15 g of gold. (Cgold = 0.126 J/gºC)
Round your answer to the nearest whole number.
°C
E
3
4
5
Next
O
I 17
Answer:
48 °C
Explanation:
q = 90J
m = 15 g
C = 0.126 J/gºC
q = mct
90 = (15)(0.126)t
t = 47.62 °C = 48 °C
Answer:
Explanation:
Formula
E = m * c * Δt
Δt is what you seek.
Givens
E = 90 joules
m = 15 grams
c = 0.126
Solution
90 = 15 * 0.126 * Δt Divide by 15
90/15 = 15/15 * 0.126 * Δt
6 = 0.126 * Δt Divide by 0.126
6/0.126 = Δt
47.619 = Δt
Δt = 48 oC
Calculate the mass of Iron in 40g of Fe203
Answer:
Explanation:
Alex built a model to show how light bends when placed into water. To do this, Alex filled a fish tank up with water, and shined a green laser through the water. The angle he shined the laser into the fish tank is the line above the water, and the angle that the light bent is seen below the water. What is a limitation of this model? The model cannot show how light bends. The model is unable to use different colors of light The model cannot calculate the speed of light The model is not 3 dimensional
Answer:
The model cannot show how light bends.
Explanation:
3. 7moles of Ba(NO3)2 is dissolved in 75kg of distilled water.
What is the boiling point of this solution? Hint: Find molality first.
Answer:
100.14°C
Explanation:
The boling point elevation is a colligative property that describes the increasing in boiling point of a solution regard to the boiling point of the pure solvent. The equation is:
ΔT = Kf*m*i
Where ΔT is boiling point elevation
Kf is boiling point elevation (0.51°C/m for water)
m is molality of the solution (7moles Ba(NO3)2 / 75kg = 0.09333m
i is Van't Hoff factor = 3 for Ba(NO3)2 (Because its dissolution produce 3 ions = Ba²⁺ and 2 NO₃⁻
Replacing:
ΔT = 0.51°C/m*0.09333m*3
ΔT = 0.14°C is the boiling point elevation
As the boiling point of water is 100°C, the boiling point of the solution is:
100°C + 0.14°C =
100.14°C
Calcula cuantos mililitros de oxigeno se necesitan para quemar 3.5 ml de C₆H₆ a CNTP, la reacción sin balancear es la siguiente: C₆H₆ + O₂ → CO₂ + H₂O
Answer:
[tex]26.25mL \ O_2[/tex]
Explanation:
¡Hola!
En este caso, dado que se nos da reacción de combustión del benceno, primero debemos balancearla como se muestra a continuación:
C₆H₆ + ¹⁵/₂ O₂ → 6CO₂ + 3H₂O
Vemos que hay una relación molar entre el benceno y oxígeno de 1:¹⁵/₂, por lo que la relación de volúmenes es:
[tex]3.5 mL\ C_6H_6*\frac{15/2\ mL\ O_2}{1mL\ C_6H_6} \\\\=26.25mL \ O_2[/tex]
¡Saludos!
What would be the volume, in liters measured at STP, of 9.75 moles of carbon monoxide?
I
Potassium hydroxide is partially soluble as shown by the
following reaction:
KOH(s) K+ (aq) + OH(aq)
What is the poH of a 3.32 x 10-5 M KOH solution?
pOH =
Your answer should be rounded to three significant figures. Do not Include
units in your answer.
Answer: 4.48 or 4.47
Find the hydroxide concentration of a LiOH soultion that has a pOH of 8.65.
[OH] = _____ (round to 2 decimal places)
Answer: i need help
Explanation:
How does the composition of the nucleus change during fission, fusion, and radioactive decay?
The composition and mass of the nucleus changes during fission, fusion and nuclear decay process. During fission the nuclei breaks to light nuclei and in fusion the mass of nuclei formed is increased and in radioactive decay, the nuclear mass decreases.
What is nuclear fission?Nuclear fission is the process of breaking of a heavy nucleus into light nuclei with the release of energy. Hence, fission changes the identity of the atomic nuclei and form to light nucleus.
In nuclear fusion, two light nuclei fused up to form a heavy nucleus. Hence, the new composition changes the identity of the product. The number of protons, neutrons or electrons are differed in both fusion or fission.
Radioactive elements undergo nuclear decay by the emission of charged particles and it will reduce the atomic number or mass number or both based on the type of decay.
To find more on radioactive decay, refer here:
https://brainly.com/question/1770619
#SPJ2
- How much power does it take to lift a
1,000 N load 10 m in 20 s?
Answer:
"500 Joule/sec" is the right answer.
Explanation:
The given values are:
Force,
F = 1000 N
Velocity,
s = 10 m
Time,
t = 20 s
Now,
The power will be:
= [tex]\frac{Force\times Velocity}{Time}[/tex]
On putting the values, we get
= [tex]\frac{1000\times 10}{20}[/tex]
= [tex]\frac{10000}{20}[/tex]
= [tex]500 \ Joule/sec[/tex]
In steps 3 and 4 of the citric acid cycle, successive oxidations produce ________ as a waste product and the four-carbon carrier ________. In steps 3 and 4 of the citric acid cycle, successive oxidations produce ________ as a waste product and the four-carbon carrier ________. CO2; malate CO2; succinyl-SCoA ADP; oxaloacetate ADP; succinyl-SCoA CO2; oxaloacetate
Answer:
CO2; succinyl-SCoA
Explanation:
Citric acid cycle, also called Krebs cycle is the second stage of aerobic cellular respiration, which occurs in the mitochondrion. The kreb's cycle is made up of 7 distinct steps, with each involving series of enzymatic reactions.
According to this question, step 3 and 4 of the citric acid cycle involves an oxidation and decarboxylation reaction to produce 2 molecules of carbon dioxide (CO2) and a 4-carbon compound called succinyl group. A coenzyme A binds to the succinyl group to form succinyl-SCoA.
NO LINKS OR FILES
Using Ohm's Law and Watt's Law. write the formula to find each measurement
Wattage (Watts)
Resistance (Ohms)
Voltage (Volts)
and/or
Current (Amps)
and/or
Explanation:
Mathematically, Ohm's law is given by :
V = IR
Where
V is voltage
I is current
R is resistance
The electric power of an electrical appliance is given by:
P = VI
Wattage = VI
Resistance, [tex]R=\dfrac{V}{I}[/tex]
Current, [tex]I=\dfrac{V}{R}[/tex]
Hence, this is the required solution.
1. If 80.0 ml of 3.00 M HCl is used to make a 100. ml of dilute acid, what is the molarity
of new dilute HCl solution?
We are given:
M1 = 3 Molar V1 = 80 mL
M2 = x Molar V2 = 100 mL
Finding the molarity:
We know that:
M₁V₁ = M₂V₂
where V can be in any units
(3)(80) = (x)(100)
x = 240/100 [dividing both sides by 100]
x = 2.4 Molar
what is the mass of 0.200 mol of calcium
List and describe the four layers of the Earth.
Answer:
Crust- thinest layer; the part we live on
Mantle- just beneath the crust; consists of magma
Outer Core- liquid metal; super hot; thickest layer (i think)
Inner Core- solid metal; SUPER compressed; hottest layer