Answer:
Explanation:
metal
Answer:
I would say Metal
Explanation:
Technically, all 4 aren't renewable (but sunlight, water, and wind are considered renewable energy sources), but metal is the best choice
Metal ore will run out and cannot be recreated.
Reasons why I think all 4 aren't renewable
Sunlight will die in around 6 billion years
Water will evaporated in 6 billion years when the sun blows (if it even ever survives the global warming we're facing)
Wind will be gone when the earth is swallowed by the sun
Discuss 3 factors that affect the solubility of a solid in a liquid.
Answer:
Explanation:
Temperature: increasing the Temperature increases the solubality
Polarity: increase of polarity increases the soluablity of polar solutes
The larger the molecules of the solute are, the larger is their molecular weight and their size. It is more difficult it is for solvent molecules to surround bigger molecules.
For majority of solid and liquid solutes, pressure does not affect solubility. it is applciaable only for gasesous solute
Hope this helps you
Why is sodium stored in kerosene oil?
Answer:
Sodium is stored under kerosene because of its high chemical reactivity with almost all of other elements (for example oxygen from air which oxidizes it instantly). Kerosene and mineral oil are the only chemicals that make the sodium inert. Usually when Na reacts with a solvent it liberates hydrogen gas from its composition.
Explanation: Just saying , I want to be honest. I copied and pasted this from google
What happens to an ocean current when it hits a continent? a. It changes direction. c. It moves toward the equator. b. It moves toward the poles. d. It speeds up.
Answer: I think it is D
Explanation:
Answer:
D
Explanation:
i took the test
What is the correct order of processes in the accretion of planetesimals?
Answer:
A). Collapse, condensation, accretion, clearing.
Explanation:
Planetesimals are described as the small solid astronomical objects which are the building blocks for the formation of solid planets. Accretion is described as the process in which the solid astronomical objects cluster to form larger objects that eventually leads to the formation of planets.
As per the question, the correct order of processes that are followed in this accretion process would be a collapse, condensation, accretion, clearing. First occurs the collapse of a nebula followed by condensation of cosmic dust grains. After this, the accession or accumulation of solid parts takes place to form larger objects and this is immediately followed by the clearing of debris and dust to allow planets to form. Thus, option A is the correct answer.
Answer:
a
Explanation:
Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f) Digestion of food
Explanation:
a. chemical change
b. Physical change.
c. chemical change.
d. chemical change
e. Physical change.
f. chemical change.
Complete the following ionic equation: [tex]Zn + 2Ag^{+} ---\ \textgreater \ ......... + ..........[/tex]
Answer: [tex]Zn+2Ag^+\rightarrow Zn^{2+}+2Ag[/tex]
Explanation:
Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously and the number of electrons lost is equal to the number of electrons gained.
Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.
Anode : [tex]Zn\rightarrow Zn^{2+}+2e^-[/tex]
Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.
Cathode : [tex]2Ag^++2e^-\rightarrow 2Ag[/tex]
Thus the complete ionic equation will be :
[tex]Zn+2Ag^+\rightarrow Zn^{2+}+2Ag[/tex]
Which is evidence that a chemical reaction has likely occurred?
a liquid slowly losing volume
the formation of a precipitate
boiling water releasing steam
a change in the shape of a solid
Answer:
The formation of a precipitate
Explanation:
took thecquiz on edge. got it correct
The formation of a precipitate is a evidence that a chemical reaction has likely occurred.
What is Chemical Reaction ?
A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.
Evidence of a Chemical Reactionformation of precipitate a change in colorformation of a gastemperatureodor changeNow lets check all option one by one
Option (A): a liquid slowly losing volume
Here change in volume occurred which is not a evidence of a chemical reaction.
So it is incorrect option.
Option (B): the formation of a precipitate
Here formation of precipitate is a evidence of a chemical reaction.
So it is correct option.
Option (C): boiling water releasing steam
Here formation of evaporation takes places which is not a evidence of a chemical reaction.
So it is incorrect option.
Option (D): a change in the shape of solid.
Here change in shape occurred which is not a evidence of a chemical reaction.
So it is incorrect option.
Thus, from we can say that the formation of a precipitate is a evidence that a chemical reaction has likely occurred.
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A certain volume of a gas had a pressure of 800 torr at a temperature of -40 degrees C. What was the original volume if the volume at STP is now 450.0 cm^3?
(the correct answer is 365 cm^3. I just need an explanation.)
Answer : The original volume of gas is [tex]365cm^3[/tex]
Explanation :
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 800 torr
[tex]P_2[/tex] = final pressure of gas at STP = 760 torr
[tex]V_1[/tex] = initial volume of gas = ?
[tex]V_2[/tex] = final volume of gas at STP = [tex]450.0cm^3[/tex]
[tex]T_1[/tex] = initial temperature of gas = [tex]-40^oC=273+(-40) =233K[/tex]
[tex]T_2[/tex] = final temperature of gas at STP = [tex]0^oC=273+0=273K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{800torr\times V_1}{233K}=\frac{760torr\times 450.0cm^3}{273K}[/tex]
[tex]V_1= 364.8cm^3\approx 365cm^3[/tex]
Therefore, the original volume of gas is [tex]365cm^3[/tex]
does the volume of a liquid change
Answer:
Yes it does change
Explanation:
Formation of heat and/or light when two substances are combined indicate a _______ change.
Answer:
It's a chemical change
Which claim about cats is most likely based on science?
O A. Egyptian myths explain that the sun god, Ra, appeared in living
form as a cat.
O B. Fairy tales during the Middle Ages said that cats are evil and that
they spread plague.
C. Ancient Eastern cultures believed that cats should be held in high
regard.
D. Genetic data show that modern domestic cats are related to Near
Eastern wildcats.
Answer:D
Explanation:
The claim about cats is most likely based on science is Genetic data show that modern domestic cats are related to Near Eastern wildcats. The correct option is D.
What is a claim?A claim is a statement that is given by a person about his or her things, and they claim that the thing. It gives proof that a thing or house is a person's property.
Genetic data is the data of the genetic sequence of a person's genetic information. It is different for every person. So genetic data is very important.
So the scientific data will be the genetic data of cats that is claiming that domestic cats are related to Near Eastern wildcats. It is most likely a scientific claim.
Thus, the correct option is D. Genetic data show that modern domestic cats are related to Near Eastern wildcats.
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What causes the sea floor to move apart at a sea floor spreading center A density B continental drift C paleomagnetism D convection currents
Answer: D convection currents
Explanation:
The seafloor spreading is a phenomena that occurs due to liberation of heat from the convection currents generated in the mantle. It makes the earth crust more plastic and less dense. This happens at divergent plate boundaries. As the plates move apart, the less denser material rises. It leads to the formation of mountain and crust cracks.
SO3 is an empirical formula for which of the following?
Answer:
what are the options
Explanation:
there are no options
SO₃ is an empirical formula for S₂O₆ and the correct option is option C.
The empirical formula of a compound represents the simplest, most reduced ratio of the atoms present in the compound. It shows the relative number of atoms of each element in the compound, without indicating the actual number of atoms. In other words, it gives the simplest whole number ratio of the elements in a compound.
To determine the empirical formula, the relative amounts of each element in the compound are expressed in terms of moles or mass. Then, the ratios of the moles or masses are simplified to their lowest whole number values.
Thus, the ideal selection is option C.
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The complete question is -
SO₃ is an empirical formula for which of the following?
A. S₄O₂
B. SO₄
C. S₂O₆
D. S₂O₃
A hot spot is an area where material from deep within the mantle rises and melts through the crust above it.
Answer:
The correct answer to the following question is "TRUE".
Explanation:
Hot spots become areas within the mantle of the planet whereby unusually warmer stones melt to form magma which grows through all the surface as well as melt through as well. This seems to be a region where even the water rises through deeper inside the earth as well as warms thru the surface just above, this occurs in locations that are more or less near and nothing like the boundary of the plate.So that the given is the correct statement.
Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction? The mass of sodium hydroxide will result in the same mass of sodium chloride. The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water. The mass of hydrochloride acid will result in the same mass of sodium chloride. The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
Answer:
The statement "The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water." is true due to the Law of Conservation of Mass which states that matter cannot be created nor destroyed.
The correct answer to the question is: The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
Chemical equation is backed up by the law of conservation of matter (mass) which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to the other.
Thus,
The total mass of reactants is equal to the total mass of products.
For example: let us consider the reaction between hydrogen and oxygen to produce water
2H₂ + O₂ —> 2H₂OReactant:2H₂ = 2(2×1) = 2(2) = 4 g
O₂ = 2 × 16 = 32 g
Total mass = 4 + 32 = 36 gProduct:2H₂O = 2[(2×1) + 16]
= 2[2 + 16]
= 2[18]
Total mass = 36 gThus,
Mass of reactant = mass of productFrom the above illustration, we can conclude that the total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
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A substance is on its fifth half-life. Which approximates the percentages of radioactive and stable isotopes, respectively? 96.9%; 3.1% 3.1%; 96.9% 12.5%; 87.5% 87.5%; 12.5% Need an answer fast
Answer:
B
Explanation:
Edge 2020
Answer:
B babeeeeeeeeeeeeee
Explanation:
Which reaction does not involve neutralization? A. H 2 SO 4 + 2NH 3 -------> (NH 4 ) 2 SO 4 B. H 2 SO 4 + BaCl 2 --------> BaSO 4 + 2HCl C. H 2 SO 4 + CuO -----> CuSO 4 + H 2 O D. H 2 SO 4 + 2NaOH ----> Na 2 SO 4 + 2H 2 O
Answer:
B. H2SO4 + BaCl 2 --------> BaSO4 + 2HCl
Explanation:
Neutralization reactions are characterized by their reactants of acids and bases reacting to form salt and water. All of the options except B, have formation of salt and water. Also, B is more likely a percipitation reaction (also a double displacement reaction) and not neutralization.
If 0.360 J of heat is added to 0.7402 g of water, how much will the temperature increase?
Answer:
You are not supposed t9 be cheating
Explanation:
Answer:
ΔT = 0.116 °C
Explanation:
Using Formula
Q = mc ΔT
Where Q = 0.360, c = 4.184 and m = 0.7402
ΔT = Q/mc
ΔT = 0.360/ (4.184)(0.7402)
ΔT = 0.360 / 3.097
ΔT = 0.116 °C
So, The change in Temperature/Increase in Temperature is 0.116 °C
Chemical reactions can be recognized by the presence of heat, light, or gas formation. The ultimate outcome for any chemical reaction is the... a) change from solid to a liquid b) presence of sound c) formation of a new chemical substance
Answer:
c. formation of a new substance
Answer:
C.) formation of a new chemical substance.
write the structure of 2 butene class 10
Answer:
The answer is C4H8.
Explanation:
I hope it helps you
Pass your test fast okay
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the temperature of a sample of water increases from 20celsius to 46.6celsius as it absorbs 5650 J of heat. what is the mass of the sample?
Answer:
m = 50.74 kg
Explanation:
We have,
Initial temperature of water is 20 degrees Celsius
Final temperature of water is 46.6 degrees Celsius
Heat absorbed is 5650 J
It is required to find the mass of the sample. The heat absorbed is given by the formula ad follows :
[tex]Q=mc\Delta T[/tex]
c is specific heat of water, c = 4.186 J/g°C
So,
[tex]m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{5650}{4.186\times (46.6-20)}\\\\m=50.74\ kg[/tex]
So, the mass of the sample is 50.74 kg.
. Sketch the nucleotide being described: it uses a monosaccharide present in RNA, and a nitrogenous base found only in RNA. Point an arrow to the glycosidic bond.
Answer:
See below
Explanation:
The glycosidic bond forms between the carbon atom on the glucose molecule and the nitrogen atom present on the nitrogenous base. A diagram has been attached to show this particular bond. There is also a phosphate molecule bonded on the sugar molecule at the other end.
Create a model of the atoms of a substance moving through the solid liquid and gas states
Answer:
thats the answer
Explanation:
Wildflowers bloom earlier than large trees. This helps wildflowers compete for _____. water, light, food, or air
Answer: Light
Explanation:
The environment abiotic factors like sunlight, water, air, and soil are important for the growth of the plants. A wildflowers is a plant that grows in wild. It was not intentionally seeded or planted.
The light is one of the important environmental factor. As the wildflowers are blooming earlier than the large trees. Thus the wildflowers are receiving the light earlier than large trees.
Why do reactions need to be balanced?
A. Because the reactants must be the exact same as the products
B. Because of the conservation of energy
C. Because the volume of reactants must equal the volume of
products
D. Because atoms are not lost or gained in a chemical reaction
Answer:
A part.
Explanation:
Because the reactants must be the exact same as the the products.
Consider the word equation.
calcium hydroxide + hydrochloric acid → calcium chloride + water
Which is the corresponding formula equation?
A: CaCl2(1)→ Ca(s) + Cl2(g)
B: O CaO(s)+ H2O(1)>Ca(OH)2(aq)
C: NaOH(aq) + 2HCl(aq) → NaCl(aq) + 2H2O(1)
D: Ca(OH)2(S) + 2HCI(I) → CaCl2(aq) + 2H20(1)
The chemical equation for the given word equation is Ca(OH)[tex]_2[/tex](S) + 2HCI(I) → CaCl[tex]_2[/tex](aq) + 2H[tex]_2[/tex]0(1). Therefore, the correct option is option D.
Chemical equations are symbols or chemical formulas that depict a chemical reaction symbolically. With a plus sign separating the entities in the reactants and products, the reactant objects are listed on the left as well as the result entities are listed on the right.
An arrow indicating the reaction's direction points in the path of the products. The chemical formulas could be mixed, symbolic, or structural. The critical values of a stoichiometric figures are shown as coefficients beside the symbols as well as formulas of the various entities. The chemical equation for the given word equation is Ca(OH)[tex]_2[/tex](S) + 2HCI(I) → CaCl[tex]_2[/tex](aq) + 2H[tex]_2[/tex]0(1).
Therefore, the correct option is option D.
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If the frequency of a wave is 68 hertz then the period of the wave is going to be
Answer:
0.01471 seconds
Explanation:
the period of a wave is given by 1/frequency.
What is the molar mass of sulfur trioxide?
Answer:
80.07 g/mol
Explanation:
Sulfur's g/mol = 32.07
Oxygen's g/mol = 16.00
32.07 + 16.00(3) = 80.07 g/mol
Answer:
80.07 g/mol
Explanation:
1. Which of these show a diatomic element?
CO
H₂
He
SO₂
2. Which of these substances is an element?
Chlorine
Ice
Methane
Sodium chloride
3. When the elements lead and bromine combine together, the name of the substance formed is called .......
Lead bromate
Lead bromide
Lead bromite
Lead bromium
Answer:
1) H2
2) Chlorine
3) Lead bromide
Select the correct choice there's only one answer.
Answer:
Option C is the correct option.The Valence electrons in S
Explanation:
Sulphur has highest effective nuclear charge as in a period there is increase in effective nuclear charge from left to right.Sulphur is in the end in a period leaving Mg and Al in left side.
Hope this helps....
Good luck on your assignment...