Answer:
the answer is pH of 7 I don't no Hydrochloric hijinx work
The equation pH = -log [H+], the pH of a solution with a hydrogen ion concentration is 5. Hence option c is correct.
What is solution?Solution is defined as a continuous variation of two or more substances in their relative proportions up to what is known as the limit of solubility. Light beams do not disperse in the presence of a solution. In contrast, a suspension of particles might result in Tyndall or Rayleigh scattering. The amount of heat that is released or absorbed during the dissolving process is known as the enthalpy change of solution.
pH is defined as a measurement of how basic or acidic aqueous or other liquid solutions are. A solution's pH is a significant indicator of its chemical composition. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.
pH = -log[H+]
pH = -log[1.0 x 10⁻⁵]
pH = 5
Thus, the equation pH = -log [H+], the pH of a solution with a hydrogen ion concentration is 5. Hence option c is correct.
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Which of the following best describes foliated metamorphic rocks?
A
There are easily recognizable fossils.
B
The rock has ribbon-like layers of bands.
C
They have crystals like igneous rocks.
D
Different sized sediments can be seen.
Answer:
It's C because Metamorphic rocks were once igneous rocks. And, because Gneiss which is a Metamorphic rock has crystals inside of it.
Different rock types appear during rock formation. The best description of foliated metamorphic rocks is that;
B . The rock has ribbon-like layers of bands.Due to the pressure and heat that is exerted on some rock types, there is an alignment or foliation of rocks. The appearance can be described as ribbon-like.
The examples of rocks that fall under this classification are slate, phyllite, gneiss, and schist.
The non-foliated rocks do not show any alignment in their minerals. Examples are; quartzite, marble, and novaculite.
Summarily, option B best describes a foliated metamorphic rock.
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In the ground state, an atom of which element has seven valence
electrons?
1.
sodium
2.
phosphorus
3.
nitrogen
4.
fluorine
Answer:
Fluorine
Explanation:
Fluorine has 9 total electrons. The first two are in the 1s level, and the remaining electrons are on the outer level of the atom, with 2 in the s level and 5 in the p level. The electron configuration is 1s2 2s2 2p5.
To measure the amount of nickel in some industrial waste fluid, an analytical chemist adds 0.110 M sodium hydroxide (NaOH) solution to a 25.0 g sample of the fluid and collects the solid nickel(I) hydroxide (Ni (OH2) product. When no more Ni(OH)2 is produced, he filters, washes and weighs it, and finds that 343. mg has been produced The balanced chemical equation for the reaction is: Ni2+(aq) + 2NaOH(aq) Ni(OH)2(s) + 2 Na.
What kind of reaction is this?
a. precipitation
b. acid-base
c. redox
Answer:
a. precipitation
Explanation:
In the reaction:
Ni²⁺(aq) + 2NaOH(aq)→ Ni(OH)₂(s) + 2 Na⁺
Nickel is precipitated as Ni(OH)₂ producing Na⁺ ions.
In a precipitation two soluble ions react with each other to produce an insoluble salt.
In our problem, Ni²⁺ is reacting with OH⁻ to produce Ni(OH)₂, an insoluble salt
The reaction is a precipitation
In an acid-base reaction, an acid reacts with a base to produce water and a salt. In this problem is a base reacting (NaOH) but there are no acids in the reaction.
And in a redox reaction an ion is been oxidized whereas the other is been reduced (Loosing electrons and gaining electrons).
As you can see, Ni²⁺ still with oxidation number of 2+ in Ni(OH)₂ and Na⁺ is always +1-. Thus, this is not a redox reaction.
Which statement best describes visible light?
a. The human eye can only detect visible light as white light.
b. Visible light can only be seen with special equipment or technology.
c. Visible light makes up a small part of the electromagnetic spectrum.
d. The frequency of visible light is the same as the frequency of gamma rays.
(URGENT I NEED THIS RIGHT AWAY) (waves)
Answer:
The Visible Spectrum Visible light is the light that we can see, and thus is the only light detectable by the human eye. White light is visible light, and it contains all the colors of the rainbow, from red to violet. The range of visible wavelengths is 400 to 700 nanometers.
Explanation:
Why is cellular respiration important?
A or B?
A. It changes energy in glucose into energy that can be used.
B. It changes radiant energy into chemical energy for all living things.
Write the charge balance for an aqueous solution of arsenic acid, H3AsO4, in which the acid can dissociate to H2AsO24 , HAsO24 2, and AsO34 2. Look up the structure of arsenic acid in Appendix G and write the structure of HAsO24 2.
Answer:
Kindly check the explanation section.
Explanation:
When the Arsenic acid,H3AsO4 is put in water it dissociates to form or give out 1 proton, 2 protons or 3 protons that is 1H^+, 2H^+ and 3H^+. Check the equation showing the dissociation reactions as given below;
H3AsO4 ===========> H^+ + AsO4^-
H3AsO4 ===========> 2H^+ + AsO4^2-
H3AsO4 ===========> 3H^+ + AsO4^3-
Therefore, the total charge balance is given as:
[H^+] =[OH^-] + [ AsO4^-] + 2[ AsO4^2-] + 3[ AsO4^3-].
Kindly note that the [OH^-] is from water.
After food is consumed, chemical nutrients are absorbed into the blood. The blood then carries these nutrients to the body's cells where the nutrients enter mitochondria. Which reaction must occur next for the cell to carry on other activities?\
Answer:c. oxygen,light,and glucose combine to produce high energy molecules
Explanation:
The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane.
Which best describes those that can pass through?
They are concentrated.
They are soluble.
They are diluted.
They are heated.
Answer:
it is b (they are soluble)
Explanation:
got it right on edg and on quizlet
Answer:
B. They are soluble
Explanation:
What mass of sodium hydroxide will neutralize completely 3.612 moles of HCl?
Answer:
NaOH + HCl = NaCl + H2O
(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams
So answer B.
Explanation:
NaOH + HCl = NaCl + H2O
(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams
To solve such this we must know the concept of double displacement reaction. Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
The balanced reaction is
NaOH + HCl = NaCl + H2O
To neutralize completely 3.612 moles of HCl, 3.612 moles of NaOH is required.
mass of NaOH =Mole× Molar mass of NaOH
mass of NaOH=3.612× 40 g/mol
mass of NaOH=144.48g
Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.
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how many valence electrons in an oxygen atom?
Answer:
6 valence electrons
Explanation:
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.
For the presentation you will research and provide summaries for manned and unmanned explorations of your choice. The presentation should be about twelve slides in length. Your presentation will include:
Title
Introduction – gives an overview of the presentation
Time line of missions – must include 3 manned and 3 unmanned missions
Description of each of the missions in the timeline (1 mission per slide)
Name and date of mission
Purpose of missions
Results or findings from missions
Scientific advance – describe a scientific advancement that has led to an engineering improvement in space exploration
Engineering advance – describe an engineering advance that has led to greater knowledge about the solar system
Sources – list the websites and other sources you used
Remember to make a list (i.e., bullet points) on each slide. The slides should feature the highlights of the main idea. The bullet points should be short phrases (at most, one sentence) that highlight key points.
Answer:
Thank u ?
Explanation:
i don't get your question can you rephrase it pls
Answer:
Look this up on g00gle it will give it right to you! :)
Explanation:
Help plz:))) I’ll mark u brainliest ASAP 10 points
Can someone help me please
Which element has the same number of electrons in the outermost energy level at Lithium?
Answer:
Hydrogen, lithium, sodium, and potassium all have 1 valence electron ( an electron in the outermost energy level is a valence electron).
What reaction shows a compound breaking apart into separate substances?
A. A single-replacement reaction
B. A synthesis reaction
C. A double-replacement reaction
D. A decomposition reaction
Answer: The answer is decomposition reaction
Explanation: Hope this helps:)
Answer: D. decomposition reaction
Explanation:
is francium found in nature or lab?
Answer:
It was the last element first discovered in nature, rather than by synthesis. Outside the laboratory, francium is extremely rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 continually forms and decays
Consider phosphoric acid, H3PO4. What is the total number of moles of H+ available for reaction in 4.50 L of 0.750 MH3PO4? Write your answer as a numerical value without any units. Type your numeric answer and submit
what is the empirical formula of vitamin A ( C=83.85, H=10.56, O=5.58)
The empirical formula of vitamin A : C₂₀H₃₀O
Further explanationThe empirical formula is the smallest comparison of atoms of compound =mole ratio of the components
The principle of determining empirical formula
Determine the mass ratio of the constituent elements of the compound. Determine the mole ratio by dividing the percentage by the atomic massmol ratio of C : H : O ⇒
[tex]\tt \dfrac{83.85}{12}\div \dfrac{10.56}{1}\div \dfrac{5.58}{16}\\\\6.9875\div 10.56\div 0.34875\rightarrow divide~by~smallest(0.34875)\\\\20\div 30\div 1[/tex]
What effect does the transfer of electrons have on the nuclei of the atoms involved?
Answer:
Chemical processes have no effect on the nucleus otherwise we would be in deep truble. GOOD LESSONS ♡
using the ideal gas law, PV=nRT, where R=0.0821 L atm/mol K, calculate the volume in liters of oxygen produced by the catalytic decomposition of 25.5 g potassium chlorate according to the following reaction. The oxygen is collected at 2.22 atm and 25.44 C. express your answer to the correct number of significant figures.
2KClO3(s) ---> 2KCl(s) + 3O2(g)
Answer:
V = 2.32 Liters
Explanation:
PV = nRT => V = nRT/P
n = 25.8g/122g/mole = 0.21 mole
R = 0.08206 L·atm/mol·K
T = 25.44°C + 273 = 298.44K
P = 2.22 atm (given in problem)
V = (0.21mol)(0.08206 L·atm/mol·K)(298.44K)/(2.22atm) = 2.32 Liters at 25.44°C & 2.22atm
What is nuclear fusion what role does it play in the sun
Answer:
Nuclear fusion is when two atomic nuclei combine and form one nucleus. Nuclear fusion generates all of the Sun's energy. Inward pulling by the Sun's gravity is counteracted by outward pushing by the Sun's nuclear fusion; this balance keeps the sun from collapsing or exploding.
Explanation:
Answer:
it converts mass into energy and hydrogen into helium.
Explanation:
Nuclear fusion, the source of all the energy so generously radiated by the Sun
Which of the following physical properties is NOT characteristic of a metal?
A.Malleable
B.Solid at room temperature
C.Dull in color
D.Good conductors
the ATOMIC WEIGHT OF ALUMINUM (AL) is 26.98. It has 14 neutrons. Aluminum has ?
a. an atomic mass of 13
b. an atomic number 13
c. 26 electrons
d. 26 protons
I believe b. an atomic number 13. is the answer.
The atomic weight of Aluminum (AL) is 26.98. It has 14 neutrons. Aluminum has an atomic number 13. Therefore, option B is correct.
What is atomic number?The atomic number of an element represents the number of protons in the nucleus of its atoms. Since the atomic number of an element is unique and determines its position in the periodic table, aluminum has an atomic number of 13.
The number of electrons in a neutral atom is equal to the number of protons, which in this case is 13. Therefore, aluminum has 13 electrons.
The atomic weight of aluminum (Al) is 26.98, which represents the weighted average mass of all the naturally occurring isotopes of aluminum, taking into account their relative abundances. The number of neutrons in an atom of aluminum is given as 14.
Thus, the correct option is B.
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A fruit juice has a very sour taste. What does this most likely indicate?
A. The juice is a metal
B. The juice is a salt
C. The juice is an acid
D. The juice is a base
Explanation:
its hard its either B or C i dont wanna be wrong;-;
Answer:
The Juice wouldnt be a metal, Salt isnt that effective in juice if you have sensitive tastebuds. Your answer is C. THe Juice is an acid
Explanation:
Which type of rock forms when an existing rock changes under extreme pressure and intense heat?
A
igneous
B
sedimentary
C
metamorphic
Answer:
c
Explanation:
metamorphic rocks
Answer:
C. Metamorphic
Explanation:
Can a trout and a catfish be members of the same population?
Answer:
Most likely. They eat different prey items so they would use niche partitioning. for example the leopards and lions of africa. They are both large carnivores, but are able to coexist by evolving to prey on different animals.
Explanation:
Use Figure 5-5 to determine the types of radiation described in problem 5
Answer:6.12 x 10¹⁴ s⁻¹
Objects get their colors from reflecting only certain wavelengths when hit with white light. Light reflected from a green leaf is found to have a wavelength of 4.90 x 10⁻⁷ m. What is the frequency of the light?
Explanation:
Answer: 6.12 x 10¹⁴ s⁻¹
Explanation:
Please rank the following atoms from smallest to largest: Ge, P, O
3 elements that have similar properties
Answer:The elements in the first column of the Periodic Table (other than hydrogen) are known as Group 1A metals, or alkali metals. When you compare the chemical properties of these elements (lithium, sodium, potassium, rubidium, cesium, and francium), what you'll notice is that they are all remarkably similar.
Explanation:
Lithium, sodium, and potassium are the three elements from group number 1 of the periodic table that has similar chemical and physical properties, these group 1 metals are also known as alkali metals.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.
Group 1 metals, often known as alkali metals, are a trio of elements from the periodic table that have similar chemical and physical characteristics. They are lithium, sodium, and potassium.
Thus, Lithium, sodium, and potassium are the three elements from group number 1 of the periodic table that has similar chemical and physical properties.
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What happens when a wire passes through a magnetic field?
Answer:
If a coil of wire is placed in a changing magnetic field, a current will be induced in the wire. This current flows because something is producing an electric field that forces the charges around the wire. (It cannot be the magnetic force since the charges are not initially moving).
Explanation:
Answer:
When a conductor moves through a magnetic field, there will be a generated motional emf. This is one example of Faraday's Law and it arises from the magnetic force. The voltage generated in a length of wire, presuming that the entire length moves through a uniform field, is given below.
Explanation:
To be honest I just googled
