The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Therefore, Therefore, the average pH of oceans is 8.1 while for pure water is 7 8.1 minus 7 that’ll be 1.1 higher. pH is a unitless quantity.
What is pH?
pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.
On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.
Mathematically,
pH=-log[H⁺]
The average pH of oceans is 8.1 while for pure water is 7 8.1 minus 7 that’ll be 1.1 higher.
Therefore, the average pH of oceans is 8.1 while for pure water is 7 8.1 minus 7 that’ll be 1.1 higher.
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Is anyone good at chemistry if so can someone help me please ?
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Since pH + pOH = 14, given a pOH of 4.53, our pH would be 14 - 4.53 = 9.47. And since the pH is greater than 7, this solution is basic. So, the correct answer choice would be D.
If 75 g. of Potassium Chloride (ionic compound) is dissolved in 250 grams of
water, what will be the freezing point of the solution? Kf = 1.86
Answer:
[tex]T_{f,sol}=-15.0\°C[/tex]
Explanation:
Hello there!
In this case, for these problem about the colligative property of freezing point depression, it is possible set up the following equation:
[tex]T_{f,sol}-T_{f,water}=-i*m*Kf[/tex]
Whereas the van't Hoff's factor, i, is 2 since KCl is ionized in two ions (K+ and Cl-); and the molality (m) of the solution is computed by:
[tex]m=\frac{75g*\frac{1mol}{74.55g} }{250g*\frac{1kg}{1000g} } \\\\m=4.02mol/kg[/tex]
Thus, since the freezing point of water (ice) is 0°C, we obtain the following freezing point of the solution by plugging in:
[tex]T_{f,sol}=-(2)(4.02mol/kg)(1.86\°C/mol*kg)\\\\T_{f,sol}=-15.0\°C[/tex]
Best regards!
What type of human problems can arise from acid rain?
Answer:
ooooo okkk
Explanation:
so if there was acid rain some problems would be like finding food and shelter. the world would go even weirder then it is now lol. but our food would be gone and we would need to adaot and find acid proof shelter. many people would be lost and ya our water would also get poisened ands such
Answer:
Contanimation of food and water sources; this is even more serious because all life is interconnected, and the negative effects of acid rain therefore spread throughout; respiratory problems could arise in people; negative effects on infrastructure (corrosion)
what is the formula for fluoride?
Answer:Chemical formula F −
Molar mass 18.998403163 g·mol−1
Conjugate acid Hydrogen fluoride
Explanation:
Which statement regarding rocks is correct?
Rocks can change from one type to another through the rock cycle.
Rocks that melt are no longer part of the rock cycle and cannot become rocks again.
Rocks that break down into smaller particles are no longer part of the rock cycle and cannot become rocks again.
Rocks can break down into smaller rocks but cannot change type.
Answer:
Explanation:
Option A Rocks can change from one type to another through the rock cycle is the correct answer
how do the polarization make the cell defective
Answer:
Batteries convert chemical energy into electrical energy. Polarization is a defect that occurs in simple electric cells due to the accumulation of hydrogen gas around the positive electrode. In simple cells, hydrogen gas is evolved as a result of chemical reactions taking place inside the cell
Why is there not a constant molar volume for solids and
liquids?
a Solid and liquid particles are packed close together,
b The densities of solids and liquids are variable.
с
The volume of a solid or a liquid has very little
empty space.
d All of the above
Answer:
all of the above
Explanation:
i got the answer right on cK-12
Hello you are not the soy de Paraguay y quiero hacer amigos
Answer:
somos amigos, ¿verdad?
Explanation:
The following diene does not undergo Diels Alder reaction because _____. Click on text below: A. it does not have an electron donating group B. it does not have an electron withdrawing group C. the bicyclic ring does not function as a diene D. it cannot adopt the s-cis conformation E. the double bonds are not in the same cyclic ring
Signals from the make skeletal muscles move. A. Nervous system B.
Digestive system C. Respiratory system D. Muscular system
Answer:
Signals from the A. Nervous system make the skeletal muscles move.
1
Which of the following is an example of a nonrenewable
resource?
A
B
C
D
Answer:
B not really sure tho :)
Explanation:
2. Seed color--- a. Yellow is dominant (Y) b. Green is recessive (y) c. A yy father and a yy mother d. What color(s) are the parents? e. What color(s) are the children?
Answer:
The parents are green and the children are green.
Explanation:
They all have the green recessive (y). So, the parents are green and the children are green.
Which product forms from the synthesis reaction between lithium (Li) and oxygen (O)?
A. Li2O
B. LiO
C. LiO2
D. Li2O2
Answer:
A Li2O
Explanation:
Li has a 1+ charge and O has a 2- charge so to balance the charges there needs to be 2 Li for every 1 O
The product forms from the synthesis reaction between lithium (Li)and oxygen (O) is Li₂O. The correct option is A.
What is synthesis reaction?
Synthesis reaction is the reaction when two or more products combine to form a single product.
An example of a synthesis reaction is the combination of sodium (Na) and chlorine (Cl) to produce sodium chloride (NaCl).
Thus, the correct option is A. Li2O.
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How many atoms of Bi are there in a 41.8 g sample?
Answer:
The number of particles in the 41.8g sample of Bismuth is 12.044 × 10²³
By examining electron domain geometry, one can determine that the ammonia molecule (NH3) has
O one sp2 orbital.
O two sp2 orbitals.
O three sp orbitals.
O four sp3 orbitals.
Explanation:
2 or 4 does are the most reasonable
Answer:
I believe its D - four sp3 orbitals
Explanation:
Edg: 2021
Please help
I need to turn in in 5 min
<3
A solution contains 6.30 x 10-2 g of oxalic acid, H2C204 - 2
H20, in 250 mL. What is the molarity (M) of this solution?
Answer: c= 1.99·10^-3 mol/l
Explanation: molar mass of oxalis acid is M=126.068 g/mol.
V= 0.25 l and mass is 0.063 g
Amount of substance n = m/ M = cV
Molality c = m/MV
A voltaic cell consists of a strip of cadmium metal in a solution of Cd(NO3)2 in one beaker, and in the other beaker a platinum electrode is immersed in a NaCl solution, with Cl2 gas bubbled around the electrode. A salt bridge connects the two beakers.
1. Which electrode serves as the anode, and which as the cathode?
a. Pt serves as the cathode, Cd as the anode.
b. Cd serves as the cathode, Pt as the anode
2. Does the Cd electrode gain or lose mass as the cell reaction proceeds?
3. Write the equation for the overall cell reaction.
4. What is the emf generated by the cell under standard conditions? E0= ? V
Answer:
b.
Explanation:
(d) Other
sugar molecules become
_____ and are carried away from the crystal.
the force of attraction is
Answer:
liquid
Explanation:
defiantly
A 1.52 g sample of KCIO3 is reacted according to the balanced equation below. How many liters of O2 is produced at a pressure of 0.974 atm and a
temperature of 37'C?
2 KCIO3(s) ---> 2 KCI (s) + 3 O2(9)
Answer:
0.486 L
Explanation:
Step 1: Write the balanced reaction
2 KCIO₃(s) ⇒ 2 KCI (s) + 3 O₂(g)
Step 2: Calculate the moles corresponding to 1.52 g of KCIO₃
The molar mass of KCIO₃ is 122.55 g/mol.
1.52 g × 1 mol/122.55 g = 0.0124 mol
Step 3: Calculate the moles of O₂ produced from 0.0124 moles of KCIO₃
The molar ratio of KCIO₃ to O₂ is 2:3. The moles of O₂ produced are 3/2 × 0.0124 mol = 0.0186 mol
Step 4: Calculate the volume corresponding to 0.0186 moles of O₂
0.0186 moles of O₂ are at 37 °C (310 K) and 0.974 atm. We can calculate the volume of oxygen using the ideal gas equation.
P × V = n × R × T
V = n × R × T/P
V = 0.0186 mol × (0.0821 atm.L/mol.K) × 310 K/0.974 atm = 0.486 L
List three aids with example that are useful for people who are optically impaired
please answer then I will mark you as brainliest
Use the Lewis model to determine the formula for the compound that forms from each pair of atoms.
K and I
Express your answer as a chemical formula.
Answer:
KI
Explanation:
K is 1+ & I is 1- so we need 1 of each to balance out the compound.
Olive oil has a smoke point of 191 degree celsius and soybean oil has a smoke point of 238 degree celsius. With this in mind, explain why olive oil is better used for sautes as compared to soybean oil which is better for deep frying?
Answer:
It does not disintegrate at high temperature
Explanation:
Because of its lower smoke point, lower saturated fat and higher unsaturated fats, are considered best for higher temperature tolerance.
It is so because olive oil unlike normal oils with low smoke point will not disintegrate at high temperature and hence it can be used for deep frying
What are characteristics of absorption spectra? Check all that apply.
Light is absorbed, which produces characteristic lines.
| Light is emitted, which produces characteristic lines.
Lines are dark on a visible light background.
Lines are brightly colored on a black background.
Lines are produced by electrons being excited.
Lines are produced from electrons returning to a lower energy level.
Answer:
Light is absorbed, which produces characteristic lines.
Lines are dark on a visible light background.
Lines are produced by electrons being excited.
Explanation:
Edg
The characteristics of absorption spectra light is absorbed, which produces characteristic lines, lines are dark on a visible light background and Lines are produced by electrons being excited.
What is absorption spectra?The term "absorption spectroscopy" applies to spectroscopic methods that assess how much radiation interacts with a sample and is absorbed as a proportion of frequency or wavelength. The sample takes in photons, meaning energy, from the emitting field.
What are electrons?The electron would be a subatomic particle with a negative one fundamental charge electric charge. Due to their lack of components or substructure, electrons, which have become part of the lepton particle family's first generation, could be typically regarded to be elementary particles.
The percentage of incoming electromagnetic energy that a material absorbs across a variety of frequencies is displayed in the material's absorption spectrum. In a way, an emission spectrum would be the converse of an absorption spectrum.
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How much energy is needed to evaporate 100g of water
Answer: you would have to remove 80 calories from 1 g of pure water at the freezing point, 0˚ C, to convert it to 1 g of ice at 0˚ C. Explanation:However, 540 calories of energy are required to convert that 1 g of water at 100˚ C to 1 g of water vapor at 100˚ C. This is called the latent heat of vaporization. On the other hand, you would have to remove 80 calories from 1 g of pure water at the freezing point, 0˚ C, to convert it to 1 g of ice at 0˚ C.
Which is the correct Lewis dot structure of NH2?
A.A
B.B
C.C
D.D
E.E
I think D is your answer
Please disregard this
well i need points
Explanation:
thanks
Instead of collecting gas with a syringe, another method involves: • Submerging the evidence in a special agent • Placing a strip of charcoal in the airtight container • Using a tiny vacuum • All of the above
Instead of collecting gas with a syringe, another method involves Using a tiny vacuum.
what is gas ?One of the state of matter is Gas in which the particles are far apart, fast-moving and not organized in any particular way.
These are the substances which exist in the gaseous state, one of the three fundamental states of matter, are highly compressible and feature very large intermolecular distances.
The gaseous state is very small attractive forces between the gas particles which is separated from each other by relatively greater distances when compared to liquids and solids.
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Graphite, an allotrope of carbon, is converted into cubic diamond through a process that may take a billion years or longer. As illustrated above, scientists can make synthetic diamonds using a certain process in about one week. However, these synthetic diamonds have carbon atoms in a hexagonal lattice. Diamonds with a carbon atoms in a cubic lattice are not produced even though they are thermodynamically more stable than hexagonal diamond. Which of the following best justifies why the synthetic process produces hexagonal diamond and not the more thermodynamically stable cubic diamond?
a. The amount of energy required to create new bonds between carbon atoms in cubic diamond is much greater than the amount of energy required to create hexagonal diamond.
b. The amount of energy required to create new bonds between carbon atoms in cubic diamond is much smaller than the amount of energy required to create hexagonal diamond.
c. The activation energy needed to form cubic diamond is much less than the activation energy needed to form hexagonal diamond.
d. The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond.
Answer:
The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond.
Explanation:
The activation energy refers to the minimum energy that reacting species must possess before they can undergo a particular chemical reaction.
This implies that if species do not possess the activation energy, they hardly undergo a given reaction. The activation energy is the barrier between reactants and products.
Hence, a reaction that has a very high activation energy occurs slowly or may not even occur. The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond hence the synthetic process produces hexagonal diamond and not the more thermodynamically stable cubic diamond.
what is the speed of the electromagnetic waves please solve using correct units ill give brainliest.
Answer:
3 m
Explanation:
We'll begin by converting 99.9 MHz to Hz. This can be obtained as follow:
1 MHz = 10⁶ Hz
Therefore,
99.9 MHz = 99.9 MHz × 10⁶ Hz / 1 MHz
99.9 MHz = 99.9×10⁶ Hz
Finally, we shall determine the wavelength. This can be obtained as follow:
Frequency (f) = 99.9×10⁶ Hz
Velocity (v) = 3×10⁸ m/s
Wavelength (λ) =?
Velocity = wavelength × frequency
v = λf
3×10⁸ = λ × 99.9×10⁶
Divide both side by 99.9×10⁶
λ = 3×10⁸ / 99.9×10⁶
λ = 3 m
Thus, the wavelength of the electromagnetic wave is 3 m.