Answers
Related Questions
Carbon dioxide is formed by the given formula.
C(s)+O2(g)→CO2(g)
Carbon dioxide is
A
a compound of two elements, carbon and oxygen.
B
a mixture of two compounds, carbon and oxygen.
C
a compound of two atoms, carbon and oxygen.
D
an element of two atoms, carbon and oxygen.
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Answer:
A
Explanation:
An object has a mass of 441 g and a volume
of 10 cm3. What is the density of the object
in g/cm3?
Answers
The density is the ratio of the mass to the volume. The density of the object is 44.1 g/cm³.
What is density?Density (ρ) is the quantitative measurement of the substance having grams of mass that are dissolved per cubic meter of the solution. The density is calculated as:
ρ = M ÷ V
Given,
Mass of the object = 441 gm
The volume of the object = 10 cubic meter
Density is calculated as:
ρ = 441 ÷ 10
= 44.1 g/cm³
Therefore, 44.1 g/cm³ is the density of the object.
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Why do electrons falling into different orbits give off characteristics wavelengths?
Answers
Explanation:
Because the difference in energy between orbits is different in different types of atoms, moving electrons between different orbits requires photons carrying different amounts of energy (different wavelengths).
8
Calcium carbonate (limestone) decomposes when heated.
Caco, + CaO + CO2
b) Calculate the volume of carbon dioxide produced if 10 grames were decomposed.
Answers
Explanation:
Equation -
CaCO₃ → CaO + CO₂
molecular masses of -
CaCO₃ = 40+12+16×3 = 100 g/mol
CaO = 40+16 = 56 g/mol
CO₂ = 12+16×2 = 44 g/mol
Now,
If 100 g of CaCO₃ is decomposed then it produces 56 g of CaO and 44g of CO₂
Then,
If 1 g of CaCO₃ is decomposed then it produces 56/100g of CaO and 44/100g of CO₂
Now,
Here in question, 10g of CaCO₃ is decomposed
It means, It produces
56/100 × 10 = 56/10 = 5.6 g of CaO and
44/100 × 10 = 44/10 = 4.4 g of CO₂
Now,
we get that 10 g of CaCO₃ on burning produces 4.4 g of CO₂
we need to calculate volume of 4.4 g of CO₂
mole = mass/Gram molecular massThen,
mole = 4.4/44 = 0.1
Now,
volume = mole × 22.4 (in Litres)
= 0.1 × 22.4 = 2.24 L
Hence,
2.24 L of CO₂ will be produced when 10g of CaCO₃ decomposed.
whats the formula for mass
Answers
Answer:
The unit of molar mass is kg/mol. Where, m = mass, v = velocity.
Hope that helps :)
Beaux has purchased a synthetic material for a product he is launching. What is most likely a benefit of this material?
It is biodegradable.
It can be recycled cheaply.
It is heavy.
It can be mass produced.
Answers
Answer:
The answer is D. it can be mass produced
Explanation:
Answer:
The answer is D It can be mass produced.
Explanation:
I just took the test
A student analyzed an unknown sample that contained a single anion. The sample gave a white precipitate upon addition of a solution of AgNO3 which dissolved in ammonia. Which anion is present in the unknown solution? Write the corresponding net ionic equation.
Answers
Answer:
Chloride ion
Explanation:
The anion present in the unknown solution would be chloride ions.
A white precipitate of silver chloride is usually formed when drops of silver nitrate are added to a solution containing chloride ions. The ionic equation is as below:
[tex]Cl^- (aq) + Ag^+ (aq) --> AgCl (s)[/tex]
Which of these describes a challenge that the engineer of a high-altitude
airplane would need to consider?
A. More fuel is used at higher altitudes.
B. The airplane may succumb to the power of gravity as lift
decreases at higher altitudes.
C. The airplane may need a heat shield for protection from sonic
booms.
O D. The airplane will create more drag at higher altitudes than lower
altitudes.
Answers
Answer:
I think its (B)
Explanation:
as when the air thins out at higher elevations, your lift decreases so at some point, the plane cant produce enough lift to overcome gravity.
Transfer of heat through conduction can occur in which of the following?
A. Solids
B. Liquids
C. Gases
D. All of the above
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Need help ASAP!!please
Answers
Which of the following describes the energy transformations that occur when a toaster is used to make toast?
Thermal energy is transformed into chemical energy in the toaster, and chemical energy is transformed into thermal energy in the toast.
Electrical energy is transformed into thermal energy in the toaster, and chemical energy is transformed into thermal energy in the toast.
Light energy is transformed into thermal energy in the toaster, and thermal energy is transformed into chemical energy in the toast.
Electrical energy is transformed into thermal energy in the toaster, and thermal energy is transformed into chemical energy in the toast.
Answers
Answer:
Thermal energy (B)
Explanation:
just did it
Electrical energy is transformed into thermal energy in the toaster, and chemical energy is transformed into thermal energy in the toast. Hence option b is correct.
What is chemical energy?Chemical energy is defined as chemical substances' potential energy, which is released as they experience chemical reactions and change into other substances. Additionally, it is what binds a substance's molecule's together. The body transforms or changes the chemical energy in food into heat and mechanical motion.
The wire attached to the power source transmits electrical energy to the toaster. The heating element is a part of the toaster. This heating element transforms electrical energy into heat energy, which aids in toast preparation, when it comes into contact with it. Thus, with an electric toaster, electrical energy is converted to heat energy.
Thus, electrical energy is transformed into thermal energy in the toaster, and chemical energy is transformed into thermal energy in the toast. Hence option b is correct.
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What is one example of pre-exising marine life?
dinosaur egg
shrimp burrow
leaf imprint
bird bone
Answers
Answer:
Shrimp burrow
Explanation:
Shrimp are types of sea life, whales eat them
What is the concentration of a solution of 10. Moles of copper nitrate in 5.0 liters of solution
Answers
Answer:
10.5
Explanation:
well we added together so thats the result
Which of the following elements is a metalloid? A. phosphorus B. cobalt C. silicon D. magnesium
Answers
Answer: silicon
Explanation:it just is
Respuesta
es la C. silicio
Explanation:
No existe una definición estandarizada de elemento metaloide ni un consenso completo sobre los elementos que son metaloides.
En la clasificación de metaloides se suelen incluir a:
Boro (B)
Silicio (Si)
Germanio (Ge)
Arsénico (As)
Antimonio (Sb)
Telurio (Te)
what phenomenon occurs after mass extinction?
Answers
Answer:
Diversification and adaptive radiation.
Explanation:
Does the model correctly represent the electron dot diagram of magnesium? Why or why not? Check all that apply.
M g with 1 dot above and 1 right.
*{Yes, because the chemical symbol of magnesium is Mg.}
No, because the chemical symbol of magnesium is Mn.
*{Yes, because magnesium has two valence electrons.}
No, because magnesium has seven valence electrons.
No, because both of the dots should be on top of the chemical symbol
Answer 1 and 3
Answers
Answer:
1 and 3
Explanation:
Answer: A and B or 1 and 3
Explanation:
Someone answer these please! It’s multiple choice
Answers
Answer: Number 1 is titanium.
The one where you calculate a tin block is 13.0cm.
3. Is A) Same Density And Same Chemical Properties.
4. Is also A. Ne
Explanation:
Who knows the answer to this please help
Answers
Help please! I’ll mark brainliest to who ever answers this first!!
Answers
Answer:
paleontologists is the answer to scientist who studies fossil
If the atomic number of an element is 16, what is the element's identity?
What is its atomic mass
Answers
Answer: The element is sulfur and the atomic mass is 32.07
Explanation: wasn’t sure what you were asking so gave you both
What does the symbol △ in a chemical equation mean?
Answers
Answer:
Delta, or subject to change.
Explanation:
Δ→ triangle indicates that the reaction is being heated.
What is a chemical equation?Chemical equations are symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formulae.
To express heating, we usually use Δ over reaction arrows like:
[tex]CaCO_ 3[/tex]. Δ → [tex]CaO+O_2.[/tex]
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Which indicates how evidence of climate change supports the theory of continental drift?
coal fields in several continents
volcano formation
glacial evidence found in South America
folded mountains in Africa and South America
Answers
Glacial evidence found in South America, do indicate how evidence of climate change has supports the theory of continental drift.
Climate change occurs daily all over the world. This is largely due to man's activities that has affected the atmosphere and the earth.Continental drift is simply known as the theory that states that the continents at a time has formed a single landmass, broke up, and drifted to their present locations. Glacial evidence in South America has made man to believe more in the continental drift hypothesis.Conclusively, we can therefore say that Glacial evidence found in South America, do indicate how evidence of climate change has supports the theory of continental drift.
Learn more from
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Answer:
glacial evidence found in South America
Explanation:
As water is cooled, its density increases until it reaches about
A. 4°C
B. 25°C
C. O'C
D. -2°C
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You can see protons yes or no
Answers
No. Not with the naked eye
Colour in acid of red litmus paper
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Red
Litmus paper turn red when it comes in contact with acid. It turn blue if it come in contact with a base. Neutral litmus paper is purple
This is methane, Methane is gas that is found in small quantities in Earth's atmosphere. Methane is the simplest hydrocarbon,
consisting of one carbon atom and a powerful greenhouse gas. What is the chemical formula for methane?
A)
4CH
B)
C4H
C)
C4H4
D)
CH4
Answers
Answer:
CH4
Explanation:
I looked it up and took the test
Answer:
You go to K12?
Explanation:
A massless length of twine can withstand a maximum tension of 490 N. The twine is used to spin a 28-kg ball in horizontal circular motion of radius 1.8 m. The ball is spun faster and faster until the twine breaks. What was the maximum speed of the ball?
7.2 m/s
3.2 m/s
5.6 m/s
11 m/s
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Answer:
5.6 m/s
Explanation:
Jeremiah pushed Anthony with a net force of 12 N. Anthony accelerated across the hall at 0.2 m/s2. What was Anthony’s mass?
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Answer:
6
Explanation:
Work Shown:
Force = Mass*Acceleration
F = ma
12 = m*0.2
12/0.2 = m
60 = m
m = 60 kilograms
answer this pls thanks
Answers
Answer: It is element nitrogen. It has an atomic number of 7 and the valence electron is 5. It needs 3 electrons to complete its octet state. That's why sometimes it has the oxidation number of -3 in ammonia.
If the temperature of a substance increases will the particles of that substance be moving faster or slower or at the same speed as they were before the temperature changed
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Answer:
If the temperature increases, temperature reflects the speed of the molecules, so if the molecules are at a higher temperature, they are faster and they start to break bonds and new things react.
Explanation: