Answer:
D
Explanation:
Scientists measure a variety of properties to determine water quality. These include temperature, acidity (pH), dissolved solids (specific conductance), particulate matter (turbidity), dissolved oxygen, hardness and suspended sediment.
A year has 365 days, and a day has 24 hours. If an hour has 60 minutes and a minute has 60 seconds, how many seconds are there in 1 year?
54,750 s
525,600 s
3.15 Times. 107 s
1.89 Times. 109 s
Answer:
31,536,000 seconds
Explanation:
off google
Answer:
3.15 x 10^7s
Explanation:
1.) What is the molecular weight of the ketone shown below?
2.)Dry ice sublimes at −78.5 oC at a pressure of 1 atm. At room temperature and 1 atm pressure, what is happening to the dry ice molecules on a molecular level as sublimation occurs?
3.)For the pairs of molecules given below, list the intermolecular forces in each molecule. Also, give the types of electrostatic interactions that could occur between each pair of molecules
cyclohexane and CH2Cl2
CH3CH2OCH2CH3 and CH3CN
Answer:
See explanation
Explanation:
1. The Ketone was not sown in the question but i can give you a general idea of how to calculate its molecular weight. A ketone has a general molecular formula of CnH₂nO.
The molecular weight is calculated knowing that the relative atomic mass of carbon is 12, that of hydrogen is 1 while that of oxygen is 16.
Hence from the general molecular formula, the molecular weight of any ketone is calculated from; n(12) + 2n(1) + 16. Where n represents the number of atoms of each element in the ketone.
2. Sublimation of dry ice occurs when the molecules in dry ice absorb sufficient energy in the form of heat such that they now have enough energy for some molecules to overcome the inter molecular forces acting in the solid crystal and transform directly into the vapor phase. This process is endothermic.
3.
cyclohexane and CH2Cl2 molecules are held together by dispersion forces.
CH3CH2OCH2CH3 and CH3CN are polar molecules held together by dipole-dipole forces.
Look at the picture below. What kind of reaction is being used to extract copper from its salt solution using the iron nail?
Answer:
Displacement reactions
Explanation:
Displacement reactions are easily seen when a salt of the less reactive metal is in the solution. During the reaction: the more reactive metal gradually disappears as it forms a solution.
How are oxidation states of transition metals indicated in the names of metal
compounds?
A. Prefixes are used to indicate oxidation states.
B. Group numbers are used to indicate oxidation states.
C. Roman numerals are used to indicate oxidation states.
D. Subscripts are used to indicate oxidation states.
Answer:
The anser is c
Roman numerals are used to indicate oxidation states. Hence, option C is correct.
What is the oxidation state?An oxidation state is a number given to the atom of an element when participating in a chemical reaction.
Roman numerals are used to indicate oxidation states of transition metals.
The names for transition metal compounds often have roman numerals in them, because the roman numerals indicate the charge on the transition metal. But the oxidation state of Cu in CuO is +2, and the oxidation state of Cu in [tex]Cu_2O[/tex] is +1. Name metal first and charge and transition metal with a roman numeral.
The transition metals may form more than one ion, thus it is needed to be specified which particular ion we are talking about. This is indicated by assigning a Roman numeral after the metal. The Roman numeral denotes the charge and the oxidation state of the transition metal ion.
[tex]Fe^{2+}[/tex] would be named iron (II) and [tex]Fe^{3+}[/tex] would be named iron (III).
Hence, option C is correct.
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which is an example of electromagnetic energy?
a. roller coaster
b. batteries
c. green plants
d. radio waves
d. cause it is a part of energy
Answer radio waves said the person above me wait AYO HEAR ME OUT-
Why do you think Earth's plates move on the surface?
Explanation:
heat in the Earth's core
Crust
Mantle
Core
Lithosphere
Asthenosphere
Mesosphere
Sea- floor spreading
Plate tectonics
Tectonic plates
Convergent boundary
Divergent boundary
Transform boundary
Radioactive decay
Subduction zone
Continental drift
Deformation
Folding
Fault
Shear stress
Tension
Compression
Syncline
Anticlines
Law of Universal Gravitation
Law of Superposition
Law of Conservation of Mass
help Me with the meanings PLEASE And the subject is science
Crust-In geology, the crust is the outermost solid shell of a rocky planet.
Mantle-A mantle is a layer inside a planetary body bounded below by a core and above by a crust.
Core-is the innermost part of the earth, comprised of the inner core, at the center of the earth, made of iron; and b) the outer core, which surrounds the inner core, made of iron and magma.
Lithosphere-rigid, rocky outer layer of the Earth, consisting of the crust and the solid outermost layer of the upper mantle.
Athenosphere-the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
Mesosphere-the region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.
Sea floor spreading-the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.
Plate Tectonics- a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
Tectonic plates- A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. ... By contrast, oceanic crust is composed of basaltic rocks, which are much denser and heavier.
Convergent boundary- A convergent boundary is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other causing a process known as subduction.
Divergent boundary- In plate tectonics, a divergent boundary or divergent plate boundary is a linear feature that exists between two tectonic plates that are moving away from each other.
Transform boundary- A transform fault or transform boundary is a fault along a plate boundary where the motion is predominantly horizontal.
Radioactive decay- a radioactive process in which a nucleus undergoes spontaneous transformation into one or more different nuclei and simultaneously emits radiation, loses electrons, or undergoes fission.
Subduction zone- Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle.
Continental drift- Continental drift is the hypothesis that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed.
Deformation- the action or process of changing in shape or distorting, especially through the application of pressure.
Folding- A fold is a bend in the rock strata. Folding: Is a type of earth movement resulting from the horizontal compression of rock layers by internal forces of the earth along plate boundaries.
Fault- A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. ... Earth scientists use the angle of the fault with respect to the surface (known as the dip) and the direction of slip along the fault to classify faults.
Shear stress- Shear stress is the stress component parallel to a given surface, such as a fault plane, that results from forces applied parallel to the surface or from remote forces transmitted through the surrounding rock.
Tension- in physics, tension is described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar one-dimensional continuous object, or by each end of a rod, truss member
Compression- Compression, decrease in volume of any object or substance resulting from applied stress. Compression may be undergone by solids, liquids, and gases and by living systems.
Syncline- a trough or fold of stratified rock in which the strata slope upward from the axis.
Anticlines- an arch of stratified rock in which the layers bend downward in opposite directions from the crest.
Law of Universal Gravitation- Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Law of superposition- Law of superposition, a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.
law of conservation of mass- The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.
Which products would form if chlorine gas was bubbled through a solution of sodium bromide?
O Na and BrCI
O Na and BrCl2
O NaCl and Br2
O Na(Cl)2 and Br2
Answer:
C- NaCI and Br2
Explanation:
i know because i used this in a test and got 100%
Answer:
C: NaCl and Br2
Explanation:
on edge 2021
argon is an inert gas give reason.
Answer:
You're right
Argon is an inert gas.
Explanation:
Answer:
Argon is in zero group and it has octet structure so argon will not react with any compound
5. Why are the noble gases such as helium (He) and neon (Ne) grouped
together in the periodic table?
A They are nonreactive gases.
B. They are highly reactive metallic solids.
C. They are dangerous gases when combined with water.
D. They are liquid at room temperature and have high boiling points.
Pues
Answer:
A. They are nonreactive gases
Which statements correctly describe characteristics of cells? Check all that apply. A. Animal cells are all generally circular in shape.
B. Plant cells come in many different shapes and sizes.
C. Only animal cells have a nucleus.
D. Bacterial cells are smaller than animal or plant cells.
E. Most cells within a living organism are alive.
Answer:
A. Correct
B. Wrong
C. Wrong.
D. Correct.
E. Correct.
Explanation:
Question 2: Which of the following is NOT true about streams?
A. A large stream is called a river
B. All streams flow into the ocean
C. Tributaries are smaller streams
D. All streams flow downslope
Question 3: Which of the following statements is NOT part of the water cycle?
A. Water falls precipitation back to earth
B. Water soaks into the ground
C. Water evaporates from bodies to water on earth
D. Water dissolves minerals from rocks it flows over
Question 4: Which statement best describes a stream with a steep gradient?
A. It flows slowly,producing a wide valley
B. It flows slowly producing a V-shaped valley
C. It flows rapidly producing a V-Shaped valley
D. it flows rapidly producing a wide valley
Answer:
q 3 c q 2 d
Explanation:
What was the carbon cycle on the prairie like?
Answer:
Explanation:
Carbon cycle explains the movement of carbon between the earth's biosphere, geosphere, hydrosphere and atmosphere. ... Carbon atoms are then released as carbon dioxide when organisms respire. The formation of fossil fuels and sedimentary rocks contribute to the carbon cycle for very long periods.
A sealed plastic bottle of apple juice is placed in freezer. Which statement describes what is happening while the juice is changing form a liquid to a solid?
A.) Kinetic energy is increasing. B.) Particle motion is coming to a complete stop.
C.) Particle speed is staying the same.
D.) Temperature is decreasing steadily.
Your answer is B Particle motion is coming to a complete stop.That's your answer!
Hope this helps!!!
Answer:
B
Explanation:
i have the same test
I’m second guessing myself here...
What part of the earth are the plate tectonics on?
lithosphere
outer core
asthenosphere
inner core
A divalent metal oxide contains 60 % of metal. What is atomic weight of metal ?
Atomic weight of metal : 24
Further explanationProust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a fixed composition of elements
Divalent metal oxide=XO
MW O = 16
MW XO₂ = X+16
[tex]\tt \%mass=\dfrac{Ar~X}{X+16}\times 100\%\\\\0.6=\dfrac{X}{X+16}\\\\0.6(X+16)=X\\\\0.6X+9.6=X\\\\0.4X=9.6\rightarrow X=24[/tex]
How do the data support your claim above? Explain your statement above.
Answer:
the data will support my theory if the results are right for my hypothisis
Answer:
That guys answer is right i'll be trying my best to answer as much wrong in correct answers if wrong i will correct them
Explanation:
sorry i couldn't help theres over more then 200,000 people who uses brainy
Green light has a frequency of 6.01 x 10^14 Hz. What is the wavelength? (Round to the nearest hundredth) *
Answer:
4.99 x 10⁻⁷ meters or 499 nanometers
Explanation:
Use the formula:
λ = c/ν, where λ = wavelength, c = the speed of light (it's constant, 2.998 x 10⁸ m/s), and ν = frequency
λ = (2.998 x 10⁸ m/s)/(6.01 x 10¹⁴ 1/s)
λ = 4.98835 x 10⁻⁷
Round to nearest hundreth and you get 4.99 x 10⁻⁷ meters, or 499 nanometers.
HELP ME PLEASE!!! I NEED THIS OR I WILL FAIL!!!
Answer:
replacement
Explanation:
Because the No and The Ci switch but it might not be the answer but I know that they have to switch and replacement sounds like the best answer
Answer:
Oxidation
Explanation:
Hope this helps :)
Helppppp!!!! Please.....
Which substance may lower air temperatures after a volcanic eruption? lava O sulfur dioxide O carbon dioxide O water vapor
The sulfur di-oxide may lower ais temperature after a volcanic eruption through volcano.
What is volcanic eruption?A volcanic eruption occurs when a volcano releases lava and gas, sometimes explosively. A 'glowing avalanche,' which occurs when newly erupted lava slides down the flanks of a volcano, is the most deadly sort of eruption.
What is volcano?A volcano is a crack in a planetary-mass object's crust that permits hot lava, volcanic ash, including gases to escape from just a magma chamber under the surface, such as Earth.
Volcanoes release a variety of gases along with particles into the atmosphere when they erupt. Because they reflect sunlight away from the earth, some of them, like ash and sulfur dioxide, have just a cooling effect. Others, such as CO2, contribute to global warming by increasing the greenhouse effect.
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which object can electrically polarized
Answer:Static electricity works because objects which are otherwise "neutral" (in other words, objects with no net charge) can be polarized. An electric field, like one caused by a nearby charged object, can cause the charges inside of a neutral object — the protons and electrons — to move around a tiny bit.
Explanation:
Which is composed of aromatic hydrocarbons?
clothing
barbeque fuel
pain relievers
O polyvinyl chloride
Answer:
the answer is pain relievers
Which is composed of aromatic hydrocarbons?
clothing
barbeque fuel
pain relievers
polyvinyl chloride
Pain relievers are composed of aromatic hydrocarbons. Therefore, option C is correct.
What are aromatic hydrocarbons ?Hydrocarbons with delocalized pi electrons and sigma bonds between their carbon atoms are known as aromatic hydrocarbons. One example is benzene. Since they smell, they are said to as aromatic.
One aromatic ring makes up monocyclic aromatic hydrocarbons (MAHs). The well-known environmental contaminants benzene, toluene, ethylbenzene, and xylenes are among the most combustible and water-soluble aromatic hydrocarbons (BTEX).
The typical aromatic parent structure is benzene. When the benzene ring is a substituent, it is referred to as a phenyl group.
Thus, Pain relievers are make up of aromatic hydrocarbons, option C is correct.
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Explain how Newton’s third law of motion applies to a system of objects
Answer:
Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. Newton's third law is useful for figuring out which forces are external to a system
Explanation:
Answer:
Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. ... Newton's third law is useful for figuring out which forces are external to a system.
Explanation:
Which of the following is a correct formula unit of an ionic compound?
-Al2F3
-Ca2O
-Ca(OH)2
-KCl2
Answer:
[tex]Ca(OH)2[/tex]Ca(OH)2Explanation:
Ca(OH)₂ is the correct chemical formula unit of an ionic compound.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
There are four types of chemical formula:
1)empirical formula
2) structural formula
3)condensed formula
4)molecular formula
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The end result of ecological succession is called?
1.) Primary Ecosystem
2.) Secondary Ecosystem
3.) Climax Community
4.) none of these
an example of a physical change that does not involve any changes in CHEMICAL PROPERTIES. Explain which physical properties have changed and list a chemical property which has not changed.
Answer:
Ripping a Paper
Explanation:
Physical Properties changed - The size has decreased, and the shape has changed.
Chemical property- Flammability
I have the coldest temperature of the atmosphere. Who am I?
Answer:
Jack Frost of course!!!!!!!
There are several differences between chemical and physical changes. Which process is a sign of a chemical change? A. Rotting potato gives all of bad smell
B. Melting block of ice leaves a large puddle
C. A cloud quickly changes shape when blown by wind
D. A plaster statue breaks when it falls into the floor. PLEASE HELP
Answer:
A. a rotten potato gives all of bad smell
Explanation:
B,C,D are all physical changes because we can reverse them back.we can cool the water back to make ice. if the wind passes again we can randomly get the same cloud shape in c. and in d we can make that statue again. but in A can we reverse the rotting process ? ( the enzyme reaction) no we cant because it is a chemical reaction it gives a bad smell because of the chemical changes occuring in it.
hope this helps