Explanation:
When an acid is dissolved in water it forms hydrogen ions (H+) that combine with water to form the hydronium ion (H3O+) .
Answer:
Acids are substances that when dissolved in water release hydrogen ions, H+(aq). ... When dissolved, bases release hydroxide ions, OH-(aq) into solution. Water is the product of an acid and base reacting. Chemists say that the acid and base cancel or neutralise each other, hence the reaction is known as "neutralisation".
Explanation:
Archer is a soil scientist and needs to examine a bacteria sample. He wants to be able to change his magnification with different objective lenses. Which microscope should he choose?
A. Compound light microscope
B. Transmission electron microscope
C. Dissecting microscope
D. Scanning electron microscope
Answer:
C. Dissecting microscope
Explanation:
It is trying to see the surface
how do chemical characteristics of rocks effect water
Answer:
Freezing water can break rock without any change in the minerals that form the rock
Explanation:
Hope this helps→←Move the following term into the correct category
mixture
pure substance
Possible answers:
compound
air
salt in water
H2O
soda
element
Answer:
Explanation:
*Mixture this is the mixing of two or more substances by physical means.
*Pure substance are substance that can not be spotted by ordinary physical means.
*Compound are substance that combine by chemical means.
* Air is are mixture of gass with different percentage..they have no general molecular formula.
* This is the ability for a salty compound to ionize in water.
* Formula for water.
* Compound containing sodium , carbon and oxygen.
*This are pure substance that can not be spited by ordinary chemical means.
Of the following, which compound has the highest boiling point? Hexanone Hexanoic acid 1-Hexanol Hexanal
The gas laws explain how __ gases ___ . There is actually no such thing as an ideal gas, but these laws still explain generally how gases behave. The separate laws combine into an “_____”.
what’s the missing blanks ?
The gas laws explain how ideal gases are . There is actually no such thing as an ideal gas, but these laws still explain generally how gases behave. The separate laws combine into an equation ”.
Hope it helps you...
Answered by Benjemin
Identify the contents of the following mixtures. Select all that apply. Each circle is an atom. Different colors are used for different types of atoms. Indicate atoms only for atoms not bound to other atoms. Please remember that the elemental form of some materials is simply the atom itself.
Answer:
What’s the question
Explanation:
Please help (20 points)
Answer:
universe, galaxy, solar system, planet
Which part of the Periodic Table of the elements is used to identify valence electrons? *
Answer: Groups
Explanation:
The number of valence electrons of an element can be determined by the periodic table groups in which the element is categorized
P.S. Families rows in the table!
Boys diagram for sulfur
Answer:
here is a diagram of Bohr's sulfur.
What is the mass of the silver sphere in kg?
What are the transitional elements?
Answer:
Transitional element are those elements which partially fill D and F subsells.
Answer:
an element having a d subshell that is partially filled with electrons, or an element that has the ability to form stable cations with an incompletely filled d orbital
Could someone help me name this compound?
Answer:
the answer is ethanedioc acid
Answer:
Notice the double carboxy group(COOH)
Since There's two carbons
The Name of this compound is
Ethanedioic acid✅.
True or False?Proteins are an important nutrient because they provide the elements nitrogen and sulfur, which are not provided by dietary carbohydrates and lipids.
One afternoon, a man painted his house brown. Two days later, however, the house caught fire and burned down. What two changes occurred to the house?
The painting was a physical change and the burning was a chemical change
Both painting and burning were physical changes
Neither physical nor chemical changes occurred
The painting was a chemical change and the burning was a physical change
Answer:
the painting was physical and burning chemical
Need answer for 9.0mm x 2.0mm x 2.0mm
Answer: 36
Explanation: good luck
The answer for 9.0mm x 2.0mm x 2.0mm is 36 mm³ or 0.036 milliliters.
What is Conversion factor ?A conversion factor is a number used to change one set of units to another, by multiplying or dividing.
When a conversion is necessary, the appropriate conversion factor to an equal value must be used.
Volume fo object = Side³
= 9.0mm x 2.0mm x 2.0mm
= 36 mm³
Therefore, The answer for 9.0mm x 2.0mm x 2.0mm is 36 mm³ or 0.036 milliliters.
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electrons are the most
important electrons to an atom. a) outer b) inner
What is the mass of 5 mole of ammonia . Calculate the number of NH₃ molecules, nitrogen atom and hydrogen atoms in it..
Molar mass of NH_3
[tex]\\ \sf\longmapsto 14u+3(1u)[/tex]
[tex]\\ \sf\longmapsto 14u+3u[/tex]
[tex]\\ \sf\longmapsto 17g/mol[/tex]
We know.
No of moles=Given mass/Molar mass
[tex]\\ \sf\longmapsto Given\;Mass=17(5)[/tex]
[tex]\\ \sf\longmapsto Given \:Mass\:of\:NH_3=85g[/tex]
Now
Lets write the balanced equation
[tex]\\ \sf\longmapsto N_2+3H_2=2NH_3[/tex]
There is 2moles of Ammonia 3moles of H_21mole of N_2Now
[tex]\boxed{\sf No\:of\:Molecules =No\:of\;moles\times Avagadro\:no}[/tex]
For Hydrogen
[tex]\\ \sf\longmapsto 3\times 6.023\times 10^{23}[/tex]
[tex]\\ \sf\longmapsto 18.069\times 10^{23}[/tex]
[tex]\\ \sf\longmapsto 1.8\times 10^{22}molecules[/tex]
For Ammonia
[tex]\\ \sf\longmapsto 2\times 6.023\times 10^{23}[/tex]
[tex]\\ \sf\longmapsto 12.046\times 10^{23}[/tex]
[tex]\\ \sf\longmapsto 1.2\times 10^{22}molecules[/tex]
For Nitrogen
[tex]\\ \sf\longmapsto 1\times 6.023\times 10^{23}[/tex]
[tex]\\ \sf\longmapsto 6.023\times 10^{23}molecules[/tex]
Which of the following are considered elements:
Answer:
considered as element
Helium He
temperature at which the substance changes from solid to liquid is known as the:
Answer:
it is called the melting point
What will form when we add Co2 plus H20.
help me please. i wil mark you brainlist.
if your answer helps me i will add your name and tells other to follow you
Answer:
CO² + H²O ---------). H²CO³answer is this. all the numbers above alphabet will be bellow. while writing remember
Explanation:
CO² mean Carbon dioxide
H2O mean Water
H²CO³ mean Carbonic acid
Carbon dioxide+H²O = Carbonic acid
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Some insects, like bees, can see light of shorter wavelengths than humans can see. What kind of radiation do you think a bee sees?
Answer:
ultraviolet light (UV light)
When you wash your hands or dishes, you probably don't use just water. In 5-7 sentences, explain what
you use to help you wash up, how it works, and why you think it works.
Hello! here is a paragraph you can use, that I type up to explain, make sure to not copy word for word of what I said. :)
What I use to wash up is soap. Soap has a certain ph level and includes acids and alkaline that enables water to mix and create soap foam to clean. Soap can come in many shapes and sizes, and can be either liquid, solid, or even foamy. I think soap works because when you use friction between your wet hands and the soap bar, you are rubbing the substances of the soap that clean your hands to clean your hands. I think the friction of the rubbing creates a layer of soap that can be used to clean, and when you increase friction the more change of the soap.
Have a great day,
I hope this helps!
What is the atomic number of all Calcium Isotopes?
Answer:
all calcium atoms have an atomic number of 20 but there are three isotopes of calcium - 39, 40, and 42
Which of the following is NOT a chemical?
O sound
sugar
9
water
12
salt
Answer:
water is not the chemical hope ur help
How are thermal energy, particle motion, and temperature related?
Thermal energy of a substance is obtained by absorbing temperature. Thermal energy is increased by the particle motion where an increase in kinetic energy is followed by an increase in thermal energy.
What is thermal energy?Thermal energy is a form of energy gained by the absorption of temperature and results in thermal expansion of particles. As the temperature increases, the particles gains sufficient energy to move apart.
Thus, kinetic energy of molecules increases by thermal expansion. Thereby volume of the system increases. Kinetic energy is the energy generated by virtue of the motion of particles in an object.
According to kinetic theory of gases kinetic energy of particles increases with an increase in thermal energy and vice versa.
Therefore, it can be said that the thermal expansion of particles is caused by the kinetic energy gained by them which is acquired by the thermal energy gained by the particles through the absorption of temperature.
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Place the following gases in order of increasing average velocity at 300 K: Ar, CH4, N2, and N2O.
a. Ar = CH4 = N2 = N2O
b. N2O < Ar < N2 < CH4
c. N20 < N2 < CH4 < Ar
d. Ar < N2 < N2O < CH4
e. CH4 < N2 < N2O < Ar
At 300 K, The gases in order of increasing average velocity will be N2O < Ar < N2 < CH4
The molecular mass of of a gas is directly proportional to its Molecular Velocity. That is to say that Gases made up lighter molecules will have greater high-speed particles and relatively higher velocities while . Gases made up of heavier molecules have greater low-speed particles, and relatively lower velocities.
Therefore considering the gases
N20 with 44.013 g/mol , Ar with 39.948g/mol N2 with 28.0134 g/mol CH4 with 16.04 g/molThe order of increasing average velocity at 300K will be N2O < Ar < N2 < CH4
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The distance of 24 km equals:
O 2.4x104 m
O 2.4x10-1 m
O 2.4x103 m
2.4x10-2 m
2.4x102 m
Answer:
2.4* 10⁴ m
Explanation:
1km = 1000m = 10³m
(1*24)km = 10³ * 24 m
=> 24km = 2.4 * 10⁴m
Mixture of oil and water heterogeneous?give reasons.
Answer:
because mixed particles are visible in this mixture.
Answer:
Oil and water do not mix, instead forming two distinct layer called phase. The oil phase is less dense than the water phase, and so the oil floats on top of the water.
the idea that atoms are indivisible explains all of the following except which of the following
Answer:
ll matter is composed of extremely small particles called atoms.
Atoms of a given element are identical in size, mass, and other properties. Atoms of different elements differ in size, mass, and other properties.
Atoms cannot be subdivided, created, or destroyed.
Atoms of different elements can combine in simple whole number ratios to form chemical compounds.
In chemical reactions, atoms are combined, separated, or rearranged.
Each atom is uniform, homogeneous, colorless, tasteless, and indivisible.ll atoms of a given element are identical in mass and properties. Compounds are formed by a combination of two or more different kinds of atoms. A chemical reaction is a rearrangement of atom.
The basic idea that atoms are indivisible implies that atoms cannot be divided into any known smaller fractions.
Why are atoms indivisible?John Daltons theory of matter was based on the law of conservation of mass and the law of constant composition. The first part of his theory states that all matter is made of atoms, which are indivisible.
The basic idea that atoms are indivisible implies that atoms cannot be divided into any known smaller fractions. That is atom is the simplest form of any element.
However, atoms are not indestructible and it can be observed in radioactivity.
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3. What is the best explanation for the decrease in first ionization energy moving from Be to B?
(A) Moving from Be to B, more electrons are added to the
atoms, thus increasing the electron-electron repulsions.
(B) Moving from Be to B, more protons in the nucleus
attract the valence electrons, making it harder to remove
the electrons.
(C) The electrons in Be are being removed from a full sub- shell, which is more stable than the half-filled sub-shell in B.
(D) The electrons in Be are located in the 2s subshell. These electrons penetrate closer to the nucleus than the 2p electrons in B.
Answer:
The electrons in Be are located in the 2s subshell .These electrons penetrate closer to the Nucleus than the 2p electrons in B
Explanation:
See the Electronic Configurations
[tex]\\ \sf\longmapsto Be=1s^22s^2[/tex]
[tex]\\ \sf\longmapsto B=1s^22s^22p^1[/tex]
2s orbitals are more powerful than 2p orbitals.The best explanation for the decrease in first ionization energy moving from Be to B is option d. The electrons in Be are located in the 2s subshell.
The Explanation for reducing the first ionization energy:When there is reduction in the first ionization energy that moved from be to B so here the electrons in Be should be located in the 2s subsell.
Also, these electrons should penetrate closer to the nucleus as compared to the 2p electrons in B.
Hence, the option d is correct.
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