Answer:
Explanation:
Image result for describe five factors which affect propagation of sound.. please describe in details.
There are several important factors which affect the propagation of sound: geometric spreading, atmospheric effects, and surface effects. These are discussed separately below. This refers to the spreading of sound energy as a result of the expansion of the wavefronts.
A variable parameter
a. does not affect the result.
b. is the factor that changes in an experiment.
C. cannot change.
d. is rarely included in experiments.
Answer
b.
Explanation:
variable means change bro
write any two effect of gravity
The Coca- cola is diluted and reacted with molybdate/metavanadate reagent before the %T is measured.
a. True
b. False
Answer:
true
Explanation:
I believe that is the correct answer (if right brainiest plz)
Evolution means..... exchanges gradual development transcription differentiation
Explanation:
Evolution means Gradual Development. It is a procedure in the gradual development in which species of different animal's, plants etc... leisurely started to change some of their activities or elements and it changes only due to some situations it changes over many generations also.
Answer:
mark me as a brainlist answer i hope it will help you
Explanation:
Evolution means Gradual Development. It is a procedure in the gradual development in which species of different animal's, plants etc... leisurely started to change some of their activities or elements and it changes only due to some situations it changes over many generations also.
PLEASE ANSWER ASAP NEED ANSWER!!!!!!!!!!!!!! 75 POINTS
Which statement about pure substances and molecules is correct?
A. Pure substances cannot be molecules.
B. All molecules are pure substances.
C. Molecules cannot be pure substances.
D. All pure substances are molecules.
Answer:
D. All pure substances are molecules.
The correct statement about pure substances is; "All molecules are pure substances."
A pure substance contains exactly the same type of atoms. In a molecule, there can only be a particular combination of atoms.
For instance, a molecule of HCl can only contain chlorine and hydrogen atoms.
This means that every molecules are also pure substances.
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According to the molecular orbital theory how many molecular orbitals are formed when six p-orbitals of benzene combine?A) 6B) 5C) 4D) 3E) 2
there are 6 orbitals are formed when six p- orbitals of benzene combine.
This is a type of physical evidence that is present at the crime scene in very small quantities.
A. Trace Evidence
B. Indirect Evidence
C. Direct Evidence
D. Physical Evidence
Which elements would react most easily with each other? (1 point) an element with a high electronegativity and an element with a single valence electron an element with a high electronegativity and an element with a single valence electron an element with a high electronegativity and an element with a full shell of electrons an element with a high electronegativity and an element with a full shell of electrons an element with a high electronegativity and an element with low reactivity an element with a high electronegativity and an element with low reactivity an element with a high electronegativity and a second element with a high electronegativity
Answer: The question is difficult to read. Please add numbered lines and check before uploading the question. I copied and organized the best I could, followed with my answers, below.
Explanation:
1. an element with a high electronegativity and an element with a single valence electron YES
2. an element with a high electronegativity and an element with a single valence electron Duplicate
3. an element with a high electronegativity and an element with a full shell of electrons NO
4. an element with a high electronegativity and an element with a full shell of electrons Duplicate
5. an element with a high electronegativity and an element with low reactivity NO
6. an element with a high electronegativity and an element with low reactivity Duplicate
7. an element with a high electronegativity and a second element with a high electronegativity NO
Elements have electronegativities because of the tendency of attracting electrons. An element with a single valence electron and high electronegativity will react with each other. Thus, option A is correct.
What is electronegativity?Electronegativity has been defined by the atom's tendency to attract the electrons that are in sharing for the formation of the chemical bond. The atomic number and the atomic radii affect electronegativity.
High electronegative elements are electron acceptors and are characterized by an almost full valence shell. The electron is required by them to achieve stability and complete octet. Elements with full shells cannot accept more electrons.
Therefore, option A. high electronegative element reacts easily with a valence electron to form a bond.
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What types of atoms typically form covalent bonds?
Answer: In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.
Explanation:
the internacional system of units is based on ?
Answer:
The international system of units is basic on 7 units.
Hope it helps you.How many elements
make up hydrogen
Answer:
hydrogen is 1 element but has 2 atoms
examps of sources of primary pollutants
Answer:
Primary pollutants can be emitted from many sources including cars, coal-fired power plants, natural gas power plants, biomass burning, natural forest fires, volcanoes, and many more. The effects of primary pollutants are of concern as they can be harmful to humans, animals and plants.Sep 3, 2018
Explanation:
A primary source results from the direct emissions from an air pollution source. In contrast, a secondary source results from the formation of a pollutant in the atmosphere from the chemical reaction of precursors emitted from air pollution sources.
30 POINTS!
Which parts are only found in plant cells?
Answer:
A B and F
Explanation:
.................
3(b) The balloon did not burst when it is pressed onto 100 nails because
1. the nails are not sharp
2.the surface area of 100 nails produce high pressure on the balloon
3. the larger surface area of 100 nails produce low pressure on the balloon
3(c) To reduce pressure on the contact surface, we must apply force onto the .................... surface area.
1.largest
2.smallest
3. Any size of
Write the chemical symbols for three different atoms or atomic cations with 11 electrons.
Three ways to represent atoms or atomic cations with 11 electrons include :
[tex] {Mg}^{ + } \: {Al}^{2 + } \: {Si}^{3 + } [/tex]
Mg = magnesium has 12 electrons in its neutral state, when it loses one electron to attain stability, it's election becomes 11.
Al = Aluminum has 13 electrons in its neutral state, when it donates 2 electron to attain stability, it becomes (13 - 2). = 11
Si = Silicon has 14 electrons on it's neutral state, when it loses 3 electrons to attain stability, we have (14 - 3) = 11
Hence,
[tex]{Mg}^{ + } \: {Al}^{2 + } \: {Si}^{3 + } [/tex]
are atomic cations with 11 electrons.
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a transistor has beta=180 calculate the approximate collector and base currents if the emitter current is 10ma
Answer:
kausvsnks
Explanation:
bdjwkagsjwlak
The mass of all the water on earth is 1.4 x 1024 grams. How do you think
someone was able to measure that number?
AM AWARDING BRAINLIEST :))
Re-order each list of elements in the table below so that the elements are listed in order of decreasing electronegativity
1) Cl, Br, F
2) B, 0, C
what is the source of energy that is absorbed by the electrons to move from the ground state to excited state?
Answer:
I think an atom changes from a ground state to an excited state by taking on energy from its surroundings in a process called absorption. The electron absorbs the energy and jumps to a higher energy level. In the reverse process, emission, the electron returns to the ground state by releasing the extra energy it absorbed.
I hope this help you!:)
how many hours are in 25 years?
Consider the addition of NaCl to the ice-water mix in Part II. Which of the following statements is TRUE?
a. Salt lowers the freezing point of water by interfering with the intermolecular forces of the water molecules, allowing for more interactions between water molecules.
b. Salt lowers the freezing point of water by interfering with the intermolecular forces of the water molecules, allowing for less interactions between water molecules.
c. Salt raises the freezing point of water by interfering with the intermolecular forces of the water molecules, allowing for less interactions between water molecules
d. None of the above are correct.
Salt lowers the freezing point of water by interfering with the intermolecular forces of the water molecules, allowing for less interactions between water molecules.
What is freezing point?The Freezing point is the temperature of a liquid at which it changes its state from liquid to solid at atmospheric pressure.
Salt molecules block water molecules from packing together when temperature is lowered. It then prevents them from becoming ice. More water molecules leave the solid phase than the ones entering the solid phase. Freezing point depression occurs when the freezing point of the liquid is lowered by addition of solute.
Hence, option B is correct.
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Which statement about an atom is correct? (1 point)
O The proton has no charge and is found in the nucleus.
O The neutron has no charge and is found outside of the nucleus.
O The neutron has a negative charge and is found in the nucleus.
o The electron has a negative charge and iş found outside of the nucleus.
Answer:
D. the electron has a neg. charge and is found outside of the nucleus.
Explanation:
the proton has a positive charge, while the neutron has no charge at all. both are found in the nucleus.
the electron has a negative charge, but stays outside of the nucleus in the electron cloud, constantly moving around.
Taking into account the constitution of an atom, the correct statement is "The electron has a negative charge and iş found outside of the nucleus."
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
Every atom consists of:
A nucleus in which neutrons and protons meet. Energy levels where electrons are located.In other words, the atomic nucleus is the central part of the atom that is made up of protons and neutrons, while the orbitals or peripheral region is an area where electrons are found.
The neutron is an electrically neutral subatomic particle, while the proton has a positive electrical charge. Electrons have a negative charge, move around the nucleus at different energy levels and are attracted to protons, positive in the atom through electromagnetic force.
In summary, the correct statement is "The electron has a negative charge and iş found outside of the nucleus."
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https://brainly.com/question/1814899?referrer=searchResultshttps://brainly.com/question/2449569?referrer=searchResultswrite a short note on importance of air
what is a cavity in your own words
Answer:
A cavity is a hole in a tooth that develops from tooth decay Cavities are permanently damaged areas in the hard surface of your teeth that develop into tiny openings or holes .They are caused by a combination of factors, including bacteria in your mouth, frequent snacking, sipping sugary drinks and not cleaning your teeth well.
these are in my own words
am I right or am I wrong what answer is it
Answer:
you're righttttttttttttttttttttt
Answer:
yes because my class went over sum like that
Explanation:
If a stronger solution of sodium bicarbonate was used in beaker C, would it require more or less hydrochloric acid to neutralize and why?
Part A; A stronger solution of sodium bicarbonate require more hydrochloric acid will be required
Part A; The reason why more HCl is required is due to the presence of more hydroxyl ions in the solution
The reason arriving at the above responses are as follows;
Part A
Sodium bicarbonate, NaHCO₃, is baking soda = A basic salt; has the capacity to deprotonate water
Hydrochloric acid, HCl = An acid
The reaction between sodium bicarbonate and hydrochloric acid is presented as follows;
NaHCO₃ + HCl → CO₂ + H₂O + NaCl
The equation for the ionic reaction is as follows;
Na⁺(aq) + HCO₃⁻(aq) + H⁺(aq) + Cl⁻(aq) → Na⁺(aq) + Cl⁻(aq) + H₂O(l) + CO₂(g)
In water, we have;
HCO₃⁻(aq) + H₂O(l) ⇄ H₂CO₃(aq) + OH⁻(aq)
The presence of a stronger solution of sodium bicarbonate, will produce more hydroxyl ions, OH⁻(aq), which will require, more HCl to neutralize
Therefore, if a stronger solution of sodium bicarbonate was used, more hydrochloric acid will be required
Part B
The solution of stronger sodium bicarbonate will contain a higher concentration of hydroxyl ions and therefore, require more HCl, to neutralize
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which type of substance can separated using a centrifuge?
Answer:
Its separates the components of heterogeneous mixtures.
like examples :-
liquids in liquids, solids in liquids, solids and liquids in gases.
How many significant figures are in 4500000. mL?
Explanation:
1 significant figure and 0 decimal
what is the chemical formula of ( methane ) ??
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what is the chemical formula of ( methane ) ??
» CH4[tex] \: [/tex]
--⚘ Mishi ChaeYoon ⚘--Answer:
[tex]CH_4[/tex]
Explanation:
Methane is a chemical compound with the formula CH4. ( One atom of carbon and four atoms of hydrogen).
------------------------
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Pls help ASAP!!!
Based on patterns of the periodic table, which element is the least malleable in its solid state?
A. Strontium (Sr)
B. Copper (Cu)
C. Antimony (Sb)
D. Phosphorus (P)
Answer:
These are the answers for the Atomic Number Quick Check
Explanation:
1. An element is highly conductive, highly reactive, soft, and lustrous. The element most likely belongs to which group?: alkali metals
2. How does mercury differ from other metals?: It is not solid under normal conditions.
3. Based on patterns in the periodic table, which element is the least malleable in its solid state?: phosphorus (P)
4. In which group of elements does tellurium (Te) belong?: metalloids
5. Which statement describes the properties of lanthanoids and actinoids?: They are malleable and lustrous, and they tend to conduct both electricity and thermal energy.
Hope this helps :)
Based on patterns of the periodic table, the chemical element which is the least malleable in its solid state is: D. Phosphorus (P).
A periodic table refers to an organized tabular arrangement of all the chemical elements, typically arranged in order of increasing atomic number or number of protons (in rows).
Phosphorus is denoted by the chemical symbol P and it is a chemical element with an atomic number of fifteen (15) and as such it is found in group five (5) of the periodic table.
Malleability is one of the chemical properties of a chemical element and it is simply a measure of it softness such as when hammered.
According to trends (patterns) of the periodic table, Phosphorus (P) is the chemical element which is the least malleable in its solid state.
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