Explanation:
The pH of a substance can be found by using the formula
[tex]pH = - log[ H^{ + } ][/tex]
where [ H+ ] is the hydrogen ion concentration in the substance
From the question
[ H+ ] = 2.1 × 10-¹² M
To find the pH substitute the value into the above formula
We have
[tex]pH = - log(2.1 \times {10}^{ - 12} ) \\ = 11.6777807 \: \: \: \: \: \: [/tex]
We have the answer as
pH = 11.7The solution is basic since it lies in the basic region that is from 8 to 14
Hope this helps you
hierve a la misma temperatura un mililitro o un litro de la misma sustancia
Answer:
Yes
Explanation:
Since it is asking you if it boils at the same temperature, not at the same time, instead if it were for the time the answer would be no, because the more substance, the longer it would take to reach the point.
It is true that a millimetre or a liquid of a substance would require same temperature to boil no matter how much amount of that substance you want to boil.
Thus the answer is YES.
1. How is mass number, Atomic number, number of neutron, proton and electron related? 2. List down the applications of isotopes.
Answer:
1) Atomic number = number of proton or electrons
Mass number = number of proton or electron + number of neutron
Answer: here your answer
Explanation:
1) Atomic number = number of proton or electrons
Mass number = number of proton or electron + number of neutron
what are 3 forces that can cause a physical change
Explanation:
Physical changes are caused by forces like motion, temperature, and pressure.
Question 23 (3 points)
If a piece of aluminum has a density of 2.70 g/mL and its mass is 8.1 g. What is its volume?
Answer:
The answer is 3.0 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass of aluminum = 8.1 g
density = 2.7 g/mL
It's volume is
[tex]volume = \frac{8.1}{2.7} \\ [/tex]
We have the final answer as
3.0 mLHope this helps you
How do the 5 branches of chemistry overlap?
Answer:
Chemistry, Biology, Medicine, Physics, and Geology
Select all that apply.
Which of the following do not illustrate a complete circuit?
A
B
C
D
Answer:
b row 2
Hoped I helped
Answer:
The answer is A and C.
Explanation:
A isn't complete because you need a battery to run energy through the circuit.
C isn't complete because the paper does not carry a current.
Both B and D can because they are conductible materials.
. Between the nucleus and the electrons can be found:
A. a matrix of positively-charged matter
B. different particles depending on the atom
C. dense, neutral matter
D. nothing; most of the atom is empty space
0.400 L=concert to
mL
Answer:
400 mL
Explanation:
[tex]0.400 L(\frac{1000mL}{1L} )=400mL[/tex]
Write the electron configurations for the first 10 elements on the periodic table
Explanation:
H - 1s¹
He - 1s²
Li - 1s² 2s¹
Be - 1s² 2s²
B - 1s² 2s² 2p¹
C - 1s² 2s² 2p²
N - 1s² 2s² 2p³
O - 1s² 2s² 2p⁴
F - 1s² 2s² 2p⁵
Ne - 1s² 2s² 2p⁶
pls give me brainliest!!!
The electronic configuration of the first ten elements are as follows:
H → 1s¹
He → 1s²
Li → 1s² 2s¹
Be → 1s² 2s²
B → 1s² 2s² 2p¹
C → 1s² 2s² 2p²
N → 1s² 2s² 2p³
O → 1s² 2s² 2p⁴
F → 1s² 2s² 2p⁵
Ne → 1s² 2s² 2p⁶
Elements are named according to there atomic number in the periodic table.
The number of electron in an electronically neutral atom is equals to the number of protons.
The number of protons is also the atomic number of that element.
The first ten elements are Hydrogen, Helium, lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine and Neon.
The electronic configuration of elements is base on the number of electrons.
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Which best describes thermal energy?
A.It is the difference between internal energies of two or more substances.
B.It is the sum of internal energies of two or more substances.
C.It is the portion of internal energy that can be transferred from one substance to another.
D.It is the portion of potential energy that can be transferred from one substance to another.
Answer:
Tha answer I s D. Hope it will work to u
Thermal energy is the difference between internal energies of two or more substances. Therefore, option A is correct.
What is thermal energy ?The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is done in the process.
The average kinetic energy of the system's component particles as a result of their motion makes up the thermal energy of the system. The sum of the kinetic and potential energies of the system's component particles represents the system's overall internal energy.
Thermal energy is also referred to as heat energy. A moving object's kinetic energy is its energy. Thermal energy is a type of kinetic energy because it is produced by moving particles.
Thus, option A is correct.
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How many centigrams are in 0.13 oz
Answer:
I think the answer is 368.544 centigrams
Explanation:
I hope I helped
Which cell lacks a nucleus
Answer:life
Explanation:
because we act like we have no cells
01:59:52
There are 25 elements found in living things. How many of these elements are found in some organisms but not all?
1
оооо
19
o25
Answer:
The answer is 19
Explanation:
I took the test on edg
In a model of an atom, where would I find a valence electron
Help
On a number line, suppose the coordinate of A is 0, and ARequals5. What are the possible coordinates of the midpoint of AR overbar? The possible coordinates for midpoints of the segment are nothing. (Type integers or decimals. Use a comma to separate answers as needed.)
Answer:
2.5, - 2.5
Explanation:
Given that :
Coordinate of A = 0
and AR = 5 ; distance between A and R
Possible. Coordinate of the midpoint of AR overbar.
Hence for a distance of 5 points between A and R, then R may be located 5 points either side of A, that is to the left of right.
Kindly check attached picture for detailed workings
wich event always involves a chemical change
Answer:
Burning
Explanation:
How is mass measured? What are standard units used to measure mass?
Answer: Mass in an object is often weighed on a scale. The standard units used to measure mass are the grams (g) and kilogram (kg).
Answer:
The basic SI unit of mass is the kilogram(kg). In physics mass is not the same as weight even though mass is determine by measuring the object's weight using spring scale rather than balance scale comparing it directly with known masses..
What is the wavelength of waves that have a frequency of 2.20 x 10 −4 Hz
Answer:
1.36 x 10^12 m
Explanation:
This is because the equation for wavelength is a modification of c = λf.
c is the speed of light, which is 3.00 x 10^8 m/s
2.20 x 10^-4 Hz is the frequency (f)
so to find λ, which is the wavelength, you would have to divide c by f. You would write it out like 3.00 x 10^8 m/s divided by 2.20 x 10^-4 1/s (Hz is a unit whose time is measured in seconds). The s would cancel out, you would divide 3.00 by 2.20, and you would apply the rule of exponents to the 10^8 power divided by 10^-4 for 10^12 power because the -4 is the denominator, and because it is negative, instead of subtracting the exponent you would add it
Which of the following has 6 neutrons
A. Li - 6
B. O - 16
C. F - 18
D. C - 12
Answer:
F
Explanation:
C-12,6 neutrons, 6 protons and 6 electrons
19. What is the approximate mass of one mole of helium (He) gas?
A. 2 g
B. 4 g
C. 8 g
D. 22 g
If A + B → C + D You start with 50 g of A and 30 g of B and 40 g of C are produced, how many g of D would also be produced?
Answer:40g of D
Explanation:
Law of conservation of matter:
Matter can neither be created nor be destroyed but can change from one form to another.
The total of the reactants must be equal to that of the product.
A+B=>C+D
50g+30=40g+D
80g=40g+D
D=80-40
D=40g
Animal and plant cells all have the following organelles
Question 5 options:
Cytoplasm, cell membrane, nucleus and chloroplast
Cell wall, nucleus, ribosomes, chloroplast
Cell membrane, cytoplasm, nucleus, mitochondria
Cell wall, vacuole, nucleus, cell membrane
Answer: C
Explanation: They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and peroxisomes.
Can someone give me an explanation about the location of the protons, neutrons, electrons in the atom
There are two main areas of an atom, the electron cloud and the nucleus
First, let's talk about the atom's nucleus. The nucleus is in the middle of the atom. The nucleus contains neutrons (particles with no charge) and protons (positively charged protons). The number of protons is constant in every atom of the same element, meanwhile the number of neutrons is not. The atomic number of an element describes the amount of protons in a atom of that same element and it is fixed.
The electron cloud, on the other hand, is a predicted zone that's used to roughly estimate where the electrons are within the atom. Electrons are said to have no fixed orbit.
I don't want to get too in depth and make you confused so I hope this helped!
A solution contains 90 mL of methanol, 18 mL of propanol, and 2 mL of diethyl ether. Which is the solvent in this solution
solution?
O methanol
O propanol
O diethyl ether
O water
Answer:
Methanol
Explanation:
The solvent in this solution is methanol
What is Solvent?Solvent is a substance in which the solute is dissolved.polar and non polar are two types of solvent.
What are Polar solvents and Non Polar solvents?A solvent which has dipole moments are known as polar solvents.A polar solvent can dissolve ions and other polar compounds.A non polar solvent is a solvent which does not have dipole moments.
What is solute?A substance that dissolves in solution is called solute.When two liquids are mixed to form a solution, the solute is the species that is present in the smaller ratio.
Why Methanol is the solvent in this solution?Methanol is the component that has the greatest volume compared to other solvents. It means that it is found in a greater proportion. So methanol is the solvent in this solution.
Hence the other options are incorrect.
Learn more about Solvents below
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Provide the elemental symbols for lead, iron, gallium, and tungsten respectively.
I need help with this on
Answer:
Experiment one, if you are only allowed to choose one answer choose C.
If you allowed to choose 2 answer's Choose A. and C.
Hope this helps! :)
Explanation:
Answer:
C
Explanation:
Reasoning for it being number one because it was repeated multiple times with the same answer while project 2 was repeated once
Particles in a liquid can __________.
Answer:
Slide past each other
Explanation:
"How does changing velocity affect the total Kinetic Energy (KE) of an Object?"
Hurryyy please helpp
An object at a high temperature has more or less kinetic energy than an object at a low temperature
More or less ?
Chlorine–35 has 17 protons. How many protons and neutrons does the isotope chlorine–36 have? 19 protons and 17 neutrons 17 protons and 18 neutrons 17 protons and 19 neutrons 18 protons and 17 neutrons
Answer:
17 protons
19 neutrons
Explanation:
Chlorine will always have the same amount of protons, and that would be 17 protons.
The atomic mass will change according to how many neutrons are present.
Cl - 35 is comprised of 17 protons and 18 neutrons.
We want to find Cl - 36:
We simply add 1 neutron. 18 + 1 = 19 neutrons.
