Answer:
c
Explanation:
The sun is at the center of the solar system, and the comet orbits around it.
The sun is at the center of the solar system, and the comet orbits around it. Therefore, option C is correct. Comets are orbiting around sun through the elliptical orbit.
What are comets ?Comets are tiny spatial objects that are composed of ice, dust and gases. Comets go around the sun in a highly elliptical orbit. They can spend hundreds and thousands of years out in the depths of the solar system before they return to sun at their perihelion.
Like all orbiting bodies, comets follow Kepler's Laws - the closer they are to the Sun, the faster they move. While a comet is at a great distance from the Sun, its exists as a dirty snowball several kilometers across.
But as it comes closer to the sun, the warming of its surface causes its materials to melt and vaporize producing the comet's characteristic tail. Comet tails can be as long as the distance between the Earth and the Sun. Hence, option C is correct.
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I NEED HELP ASAP !
1. How many molecules are in 643.21 grams of
Mg3(PO4)22
2. How much space (Liters) does 4.061 x 10-24
molecules of H202 take up?
3. How many H20 atoms are in 479.3 grams of
H20 gas?
4. How many grams does 80.34 L of Ca(NO3)2
weigh?
5. How many Liters of space does 893.7 grams
of CO2 take up?
6. How many grams are in 5139 x10425
molecules of Al(OH)3
Answer:
1.
643.21g 1 mol 6.022^23
262.87 g 1 mol
= 1.4735E24 [Mg3(PO4)2]
2.
4.061x10^24 1mol 22.4 (L)
6.022^23 1mol
= 151 liters H2O2
3.
479.3g 1 mol 6.022^23
18.02g 1mol
= 1.60E25 H20 atoms
4.
80.34L 1mol 164.1
22.4L 1mol
588.6g Ca(NO3)2
5.
893.7g 1mol 22.4
44.01g 1mol
= 427 L CO2 or 427.4
6.
5.39 x 10^25 1mol 78.01
6.022^23 1mol
= 6980g Al(OH)3
hope this helps!! :)
Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. The rate of this reaction can be changed by changing the size of marble chips.
Describe experiments to investigate what effect using smaller marble chips has on the rate of this reaction.
Answer:
See explanation
Explanation:
We know that surface area is an important determinant factor in the study of reaction rate. This is the reason why finely divided marble chips react faster than lumps of marble in the reaction between marble chips and dilute HCl.
Now imagine that i have a lump of marble and i have finely divided marble. Then i also have a solution of 0.5 M dilute HCl. If i introduce 1g of the lump of marble into 250 ml solution of the 0.5 M HCl in one beaker and introduce 1g of finely divided marble into another 250 ml solution of 0.5 M HCl in a separate beaker, we will notice that the finely divided marble chips reacts faster as evidenced by the quicker effervescence of CO2 gas from the later compared to the former.
Hence, smaller marble chips reacts faster with dilute HCl than a lump of marble.
Answer:
yes the above given answer is absolutely correct I agree with u man on the above.
y’all pleasee answer these
What two processes occur at the mid ocean ridge?
Answer:
ridge push and slab pull
Explanation:
there are two processes through to be responsible for the spreading seen at mid ocean ridges and there is some uncertainty as to which is dominant. ridge push occurs when the weight of the ridge pushes at the rest of tectonic plate away from the ridge often towards a subduction zone. hope this helped
How is the chemical bonding within a crystal of gold (Au) different from the
chemical bonding within a crystal of table salt (NaCl)?
Answer:
In the gold crystal, the atoms are bonded by freely moving electrons. In the salt crystal, the atoms are bonded by the attraction of opposite electrical charges.
Explanation:
A.pex
A crystal of Gold (Au) has metallic bonding whereas a crystal of NaCl has ionic bonding.
What is Chemical Bonding?Chemical bonding refers to the formation of a chemical bond between two or more atoms, molecules or ions to give rise to a chemical compound.
Ionic bonding occurs by transfer of electrons from one atom to another and is usually between a metal and a non metal atom. This type of bond is classically described as occurring when atoms interact with one another to either lose or gain electrons.
Metallic bonds are the chemical bonds that hold atoms together in metals.
Therefore, A crystal of Gold (Au) has metallic bonding whereas a crystal of NaCl has ionic bonding.
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Write your explanation on how plants
nake their own food?
imnortont bynroduct of
Answer:
photosynthesis are ligt water and carbon dioxide
Explanation:
Plants make their own food out of inorganic compounds through a process called photosynthesis that takes place in the leaves. The ingredients necessary for photosynthesis are light, water and carbon dioxide.
PLEASE HELP!! WILL MARK BRAINLIEST
Use the Internet to list five examples of elements with their properties and five examples of compounds with their properties.
Answer:
here you go
Explanation:
5 elements and properties:
Boron- The chemical properties of boron are more similar to carbon and silicon than elements of its own group, although boron is more electron deficient. Boron has a high affinity for oxygen-forming borates, and reacts with water at temperatures above 100 °C to form boric acid and other boron compounds.
Carbon- As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. The most common isotope of carbon has 6 protons and 6 neutrons, and has an atomic mass of 12.0107 amu. Its ground state electron configuration is 1s22s22p2.
Nitrogen- Nitrogen gas (chemical symbol N) is generally inert, nonmetallic, colorless, odorless and tasteless. Its atomic number is 7, and it has an atomic weight of 14.0067. Nitrogen has a density of 1.251 grams/liter at 0 C and a specific gravity of 0.96737, making it slightly lighter than air.
Oxygen- is the air you breath
Nickel- Nickel is a hard silver white metal, which forms cubic crystals. It is malleable, ductile, and has superior strength and corrosion resistance. The metal is a fair conductor of heat and electricity and exhibits magnetic properties below 345°C
5 compounds and properties:
Water - Formula: H2O = Hydrogen2 + Oxygen. ...
Hydrogen Peroxide - Formula: H2O2 = Hydrogen2 + Oxygen2 ...
Salt - Formula: NaCl = Sodium + Chlorine. ...
Baking Soda - Formula: NaHCO3 = Sodium + Hydrogen + Carbon + Oxygen3
Octane - Formula: C8H18 = Carbon8 + Hydrogen18
hope this helps
Astronomers send probes to other planets to take pictures of their surfaces. An astronomer thinks that briny water flows on Mars because he noticed certain features in one picture of Mars. Which method did the astronomer
use to form this hypothesis?
1.reading scientific literature
2.making careful observations
3. analyzing a natural experiment
4. conducting a controlled experiment
Answer:
Its obviously 2 or 3 and since 2 isn't a method its 3
Explanation:
There you have it
To solve this we must be knowing each and every concept related to planet. Therefore, the correct option is option C among all the given options.
What is planet?A planet must accomplish three things: circle a star, be large sufficient to have sufficient gravity to compel a spherical form, and be large sufficient that its gravity swept away any similar-sized objects near its orbit.
Our solar system's planets did not arise out of nothing. The sun didn't either. They were all engulfed in a massive gas and dust cloud. Gravity gathered a lot of material inside the center to form the sun.
Astronomers send probes to other planets to take pictures of their surfaces. An astronomer thinks that briny water flows on Mars because he noticed certain features in one picture of Mars. Analyzing a natural experiment is a method to form this hypothesis.
Therefore, the correct option is option C.
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please help PLSSSS
2020020200
Answer:Well the water molecules attract each other, and the oil molecules stick together.
sorry number two im not sure sorry:(
Explanation:
5.4 g of Aluminium reacts with 300 mL of 0.2 mol/L hydrochloric acid solution. a. Write equation for the reaction taking place. b. Specify which reactant is limiting and which reactant is excess. c. Find volume of the gas collected at S.T.P d. How many grams of salt are produced at the end of the reaction? e. How many grams of the excess reactant are left ate the end of the reaction? Given: Al=27 , H=1 , Cl=35.5
HCl as a limiting reactant
volume of the gas(H₂)= 0.672 L
mass of salt : =2.67 g
mass of excess left : 4.86 g
Further explanationGiven
5.4 g Al
300 mL of 0.2 mol/L HCl
Required
limitng reactants
volume of the gas(H₂)
mass of salt
mass of excess left
Solution
Limiting reacttantReaction
2Al + 6HCl → 2AlCl₃ + 3H₂
mol Al = 5.4 g : 27 g/mol = 0.2
mol HCl = 0.3 L x 0.2 mol/L = 0.06
mol : coefficient of reactants :
Al = 0.2 : 2 = 0.1
HCl = 0.06 : 6 = 0.01
HCl as a limiting reactant(smaller ratio)
Al as an excess reactant
volume of H₂
mol H₂ = 3/6 x mol HCl = 3/6 x 0.06 = 0.03
volume (STP : 1 mol=22.4 L) :
= 0.03 x 22.4 L
= 0.672 L
mass of salt(AlCl₃)
mol AlCl₃ = 2/6 x mol HCl = 2/6 x 0.06 = 0.02
mass AlCl₃ :
= mol x MW
= 0.02 x 133.5
=2.67 g
mass of excess(Al) left
mol (reacted) : 2/6 x mol HCl = 2/6 x 0.06 = 0.02
mol (unreacted) : 0.2 - 0.02 = 0.18
mass = 0.18 x 27 g/mol = 4.86 g
Why do we sometimes use roman numerals in naming ionic compounds?
We use roman numerals to indicate the oxidation state of metal atoms when naming compounds especially in the case of coordination compounds. It is a standard system of nomenclature.
What is oxidation state?Oxidation state of a species is the number electrons gained or lost. Oxidation state increases if electrons are lost from the atom and it will be decreased if electrons are gained.
For example, copper is in + 2 oxidation state in CuSO₄, thus it can be indicated as Cu(II). Copper can exists is +3 oxidation too. Thus the representation will be Cu (III).
All the transition metals like copper exhibit various oxidation state. So it is important to indicate in which oxidation state they are in a particular compound. In the compound Fe₂O₃, iron is in + oxidation state whereas in FeSO₄, it can be +2 . Thus it is important to note whether it is Fe (II) or Fe (III).
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If I have one mole of sulfur, how many grams would it weigh?
Answer:
32.06 grams
Explanation:
One mole of sulfur is equal to 32.06 grams of sulfur.
Answer:ok
Explanatio
heres the answer 32.065 grams because 1 mole is equal to 1 moles Sulfur
What will be the mass of 9.95 liters of propane gas (C3H8) at STP?
Answer:
19.5g
Explanation:
Given parameters:
Volume of propane gas = 9.95L
Unknown:
Mass of propane gas = ?
Solution:
To solve this problem, find the number of moles first.
At STP;
22.4L of gas makes up 1 mole
9.95L of gas will have a [tex]\frac{9.95}{22.4}[/tex] = 0.44mole
So;
Mass of propane gas = number of moles x molar mass
Molar mass of propane = 3(12) + 8(1) = 44g/mol
Mass = 0.44 x 44 = 19.5g
What particles are contained in the nucleus of an atom?
O electrons & protons
O neutrons & electrons
O neutrons & protons
O pixels & electrons
How many grams are present in 2.5 moles of silicon
Answer:
70.21375
Explanation:
rounded to he nearest tenth place 70.2
*
How do you identify forces in a diagram
sun
arrow
moon
O
Mars
If you could repeat the lab and make it better, what would you do differently and why?
There are always ways that labs can be improved. Now that you are a veteran of this lab and have experience with the procedure, offer some advice to the next scientist about what you suggest and why. Your answer should be at least two to three sentences in length.
Hello, 3Coli Here!
Your Answer is Here:
I would recheck, redo, and revise my answers, if necessary. Also, I can look at the lesson again, if I forgot something. So that's what I would do.
Hopefully, this helps!
Ask your question below!
Answer:
I will just revise and check my answer, or I can redo the lesson.
Explanation:
Have a good day! :D
A heavily wooded area needs additional solar collectors to meet energy demand. Which statement describes a possible environmental consequence of adding these collectors?
A.
The amount of air pollution will increase.
B.
The amount of water pollution will increase.
C.
More trees will need to be planted to insulate the solar collectors.
D.
Trees will need to be cleared for the solar collectors to work efficiently.
Answer:
C
I think not positive good luck tho
A heavily forested area is one that has a dense and large number of trees. The areas like mountainous tracks or the protected frosts areas of wildlife.
In order to have solar collectors that meet the demands of energy generation. Some parts of the forests may have to clear off. As for collecting the sunlight, there needs to be clear ground. As trees and forests absorb insolation.Hence the option D is correct, trees need to to be cleared for working efficiently.
Learn more about the area that needs additional solar collectors to meet energy demand.
brainly.in/question/40583530.
What happens to the ice pack over time?
Answer:
it melts?
I don't really know but I have 60% that I think the answer is correct
A. Neutrons and electrons
B. Protons and electrons
C. Electrons in energy levels
D. Protons and neutrons
Answer:
D.
Explanation:
Because protons and neutrons make up the mass of an atom.
If light and sound Travel from point a to point b And start at the same time, which is gonna reach point b first
should i get this? i heard it smells good
Answer: Maybe not? Unless you care about namebrand, theres lots of dupes.
Imagine being barefoot outside on a hot summer's day in a sunny place ,would
you rather be standing on concrete or grass? Why?
Answer:
Grass
Explanation:
On a hot summers day, while barefoot Concrete normaly has heat absorbed into it. (Or on top) So when you go to Walk on it, It normally burns the heel.
Hope I helped and Have a great day!
brainliest?
Answer:
grass
Explanation:
the concrete has a higher specific heat capacity and is basically hotter than the grass which has a lower one
Which formula is an empirical formula?
A.CH4
B.C2H6
C.C3H6
D.C4H10
Answer:
CH4
Explanation:
Given the following reaction, how many moles of iron(III)
oxide can be produced from 65.2 moles of iron?
4Fe + 302 → 2Fe2O3
PLEASE HELP!! ILL MARK BRAINLIST!!
1. Which of these is NOT found in the nucleus of an atom?
neutrons
protons
electrons
the mass of the atom
Answer:
Electrons
Explanation:
Answer:
Electrons are not found in the nucleus for they are orbiting the atom.
66 A student wants to design a controlled experiment to solve the following problem: When placed in a freezer, will hot water or cold water reach 0°C faster?
The student plans to place two containers with equal masses of water (one hot and one cold) in the same freezer in the classroom.
a List three conditions the student should keep constant for the hot-water and cold-water setups when planning this experiment. [3]
b For each condition you name, give a scientific reason why the condition needs to be the same for both the hot-water and cold-water setups
Answer:
Explanation:
is guiZ
Which of the following represents a solution? *
2 points
NaCl (s)
HCl (aq)
H2O (g)
HBr(g)
Answer:units of G.
Explanation:Milk of magnesia, a suspension of Mg(OH)2
in water, reacts with stomach acid (HCl) in a
neutralization reaction.
Mg(OH)2(s) + 2HCl(aq) −!
2H2O(l) +MgCl2(aq)
What mass of MgCl2 will be produced if
4.55 g of Mg(OH)2 reacts?
Answer in units of g.
021 (part 2 of 2) 10.0 points
What mass of HCl is required to completely
react with 4.55 g of Mg(OH)2?
what is neucler fission
Answer:
Neucler fission is a radioactive decay process. The nucleus of an atom splits into two.
