Answer:
absorb heat from the sun
Explanation:
Greenhouse gases are specific type of gases that possess the ability to trap and emit heat/thermal energy in the atmosphere. They are able to do this because of their structure. Examples of greenhouse gases are carbon dioxide (CO2), methane (CH4), chlorofluorocarbon (CFC) etc and are mostly produced via anthropogenic activities.
Greenhouse gases are therefore, produced both artificially (by burning fossil fuels) and naturally and functions to absorb heat from the atmospheric surroundings.
Consider the balanced chemical reaction below. when the reaction was carried out, the calculated theoretical yield for iron was 365 grams, but the measurement yield was 278 grams. What is the percent yield?
Fe2O3 + 3CO —> 2Fe + 3CO2
Answer:
≈ 76.16%
Explanation:
What is Percent Yield? In chemistry, percent yield is the percent ratio of the weight of the product obtained to the theoretical yield. We calculate the percent yield by dividing the experimental yield by the theoretical yield and multiplying the result by 100 to express the final answer in %.
[tex]\frac{actual}{theoretical} (100)=percentyield[/tex] ⇒ [tex]\frac{278}{365} (100)=76.1643835616[/tex]
≈ 76.16%
hope this helped :)
Answer:
76.16%
Explanation:
I know answer is correct because I got the exact same question :)
What objects in the solar system are larger
than Earth?
A. Mars, Mercury, and Venus
B. Neptune, Pluto, and Uranus
C. the inner planets and the Sun
D. the outer planets and the Sun
Answer:
d
Explanation:
the outer planets are uranus neptune jupiter and saturn also the sun all way bigger than the earth
Convert 1.81×1024 atoms of carbon to moles of carbon.
Answer:
3 mol
Explanation:
[tex] \frac{1.81 \times 10 {}^{24} \times C \times atoms}{6.022 \times {10}^{23}\times C \times atoms \times mol {}^{ - 1} } = 3 \: \: mol \\ [/tex]
DRAW THE STRUCTURE (ASAPP)
The structure of 3-ethyl-2 fluroheptane is attached. The chemical formula of the compound is C9H19F.
What is 3-ethyl-2 fluroheptane?It is an organic compound which has one pair of hydrogen and acceptor and zero hydrogen bond donor.
The chemical formula of the compound is [tex]C_9H_1_9_F.[/tex]
Thus, the structure of 3-ethyl-2 fluroheptane is attached. The chemical formula of the compound is C9H19F.
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Question 5 of 5
A spiral staircase like the one shown can be a model of the
structure of a DNA molecule.
In this model, what do the steps on the staircase represent?
Answer:
A
Explanation:
l took the test
Which characteristic can be inherited?
long toes
acting ability
sense of humor
short temper
Answer:
long toes
Explanation:
the other traits are personality related, not a biological factor. they can be learned, but not inherited
Using this Punnett Square, what percentage of offspring can display the recessive trait?
100%
50%
25%
0% No offspring can display the recessive trait
Answer: 0% No offspring can display the recessive trait
just did the test
Which of the following is the correct name for CCl4? O A. Carbon chlorine O B. Carbon tetrachloride O C. Carbon chloride D. Carbon tetrachlorine
What is the molar solubility of aucl3 (ksp = 3. 2 x 10-23) in a 0. 013 m solution of magnesium chloride (a soluble salt)?
The molar solubility of AuCl₃ in a 0.013 M solution of magnesium chloride is 1.81×10⁻²⁸M.
What is Ksp?The solubility product constant, Ksp, is the equilibrium constant for a solid substance dissolving in an aqueous solution. And for the AuCl₃, Ksp will be written as: Ksp = [Au³⁺][Cl⁻]³
Let the solubility of the AuCl₃ in 0.013M solution of magnesium chloride is x, of Au³⁺ is x and of Cl⁻ is 3x. But we know that MgCl₂ is a strong electrolyte and it completely dissociates into its ions and will produce 2 moles of chloride ions. For this solution let we consider the volume is 1 liter then the concentration of chloride ions in MgCl₂ is 2(0.013)=0.026M.
So, in MgCl₂ solution concentration of Cl⁻ becomes = 3x + 0.026.
Value of Ksp for AuCl₃ = 3.2 × 10⁻²³
On putting all values on the Ksp equation, we get
Ksp = (x)(3x + 0.026)³
Value of 3x is negligible as compared to the 0.026, so the equation becomes
3.2 × 10⁻²³ = (x)(0.026)³
x = 3.2×10⁻²³ / (0.026)³
x = 1.81×10⁻²⁸M
Hence the molar solubility of AuCl₃ in 0.010M MgCl₂ is 1.81×10⁻²⁸M.
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Coltan is a kind of mineral and is a resource. lumber extracted from forests is a resource. electricity generated from coal and oil comes from resources. electricity generated from wind or solar power comes from resources.
Coltan, lumber and fossil fuels are all part of the resources that exists in the environment.
What are resources?The term resources refer to those materials that we extract from the environment that can be used or our good. These resources could include minerals or energy raw materials.
However, coltan, lumber and fossil fuels are all part of the resources that exists in the environment.
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Answer B A B A
Explanation:
i got it right
4. how are ions related to the magnetic field of the earth?
Answer:
When ions move over a polar cap of Earth, the changing shape of the magnetic field lines bends the drift path induced by the electric field normal to the magnetic field. The centrifugal acceleration associated with this bending shoots the ions away from the Earth along the magnetic field lines
Explanation:
Why is sea water more dense than tap water? Give than explanation for these differences pleaseeee don’t copy off the internet :( I really need a good answer for this
Answer:
See below ~
Explanation:
Sea water has a high amount of salt present in it. The density of salt is higher than that of water. It dissolves in water, thereby increasing its density. Hence, this is why sea water has a higher density than tap water.
Answer:
sea water have high density and also they're moving from one side to another more than tap water
tap water have less density and also they're not moving ever they ain't move than sea water
ANYONE PLEASE HELP BY THURSDAY!!
Bodies of water, such as ponds, freeze from top to bottom, forming a floating sheet of ice. This can help aquatic organisms survive during cold winter months. Which of the following statements explains why the ice floats on the
Surface of the pond?
A- the ice molecules have higher kinetic energy then the liquid molecules, causing them to float
B- the crystalline structure of solid ice makes it less dense than liquid water
C- as water freezes ionic bonds form between water molecules preventing the ice from sinking below the surface
Answer:
c
Explanation:
i dont have one
According to science what can we say about elements
Answer:
Elements were formed from a supernova in space that was so powerful, it gave us almost all the elements we have today.
What is the correct order of the atmospheric layers from bottom to top
The correct order of the atmospheric layers from bottom to top are
The lowest layer that is the TroposphereThe layer right above the troposphere is the StratosphereThe layer above the Stratosphere is the MesosphereThe layer above the Mesosphere is the ThermosphereThe topmost layer that continues till it merges with space is the ExosphereWhat volume of a 14.0 M solution of sulfurous acid is required to make 175 mL of a 0.750 M solution? Round your answer to two decimal places.
9.38ml of a 14.0 M solution of sulfurous acid is required to make 175 mL of a 0.750 M solution.
What is Molarity ?
Molarity (M) is the amount of a substance in a certain volume of solution.
Molarity is defined as the moles of a solute per liters of a solution.
Molarity is also known as the molar concentration of a solution.
The units of molarity are M or mol/L.
M = moles solute / liters solution
We know that
M₁V₁ = M₂V₂
It is given that M₁ = 14 M
V₁ = ?
M₂= 0.75 M
V₂= 175 ml
so
14 * V₁ = 0.75 * 175
V₁ = 9.38 ml.
Therefore 9.38ml of a 14.0 M solution of sulfurous acid is required to make 175 mL of a 0.750 M solution.
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Commercial agriculture can often lead to water-quality problems. In one to two sentences, explain how two of those problems occur.
anyone ?????
Commercial agriculture can lead to water-quality problems because water can be used for irrigation and washing chemical products.
What is commercial agriculture?The term commercial agriculture makes reference to the techniques to produce high yields in extensive crops.
Commercial agriculture may lead to contamination problems due to the use of herbicides and pesticides.
In conclusion, commercial agriculture can often lead to water-quality problems because water can be used for irrigation and washing chemical products.
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For which part of the engineering process would the use of statistics to analyze data about a new drug test be helpful?
A. Making a plan
B. Identifying a need
C. Evaluating the results
D. Testing the solution
C. Evaluating the results.
Explanation:
I hope it'll help you...
. How many ethyl groups are in the molecule 3, 3-diethylpentane?
O 1 groups
O 3 groups
O 4 groups
O2 groups
Answer:
2 groups
Explanation:
The molecule 3, 3-diethylpentane has 2 ethyl groups because the prefix di- means that there are 2 homogeneous substituent groups present in the molecule.
Calculate the molar mass of sugar
Let's see
[tex]\\ \rm\Rrightarrow C_{12}H_{22}O_{11}[/tex]
[tex]\\ \rm\Rrightarrow 12(12)+22(1)+11(16)[/tex]
[tex]\\ \rm\Rrightarrow 144+22+176[/tex]
[tex]\\ \rm\Rrightarrow 166+176[/tex]
[tex]\\ \rm\Rrightarrow 342g/mol[/tex]
Use the solubility graph to answer the following questions.
1. How many grams of potassium chlorate (KClO3) are needed to make a saturated solution at 90°C?
2. How many grams of potassium chloride (KCl) can be dissolved in 68.0 g of water at 40°C?
3. 75 grams of calcium chloride is added to 100 g of water at 25°C. Is the solutions unsaturated, saturated, or supersaturated?
4. Based on the graph above, cerium sulfate (Ce2(SO4)3) behaves like a substance that is in what physical state? Explain how you know.
5. 10.0 g of KCl are dissolved at 40°C. How many more grams should be added to make a saturated solution?
The required amount of KClO₃ to prepare a saturated solution is 48 grams.
What is solubility?The ability of a material, the solute, to create a solution with another substance, the solvent, is known as solubility.
Given graph is plotted between the temperature and solubility of the substance at 100g of water, so for the given points calculation will be:
According to the graph for the KClO₃ we require almost 48g of KClO₃ to prepare a saturated solution.From the graph it is clear that at 40°C 40g of KCl will dissolve in 100g of water then amount of KCl which will dissolve in 68g of water will be calculated as:x = (40)(68) / (100) = 27.2g
On the basis of the graph, if 75 grams of calcium chloride is added to 100 g of water at 25°C then the obtained solution is the unsaturated as they have les solute then the limit.Based on the graph cerium sulfate behaves like a precipitate which will not dissolve at any temperature and present in the physical state.We can add more 30g to make the KCl solution saturated.Hence, we require almost 48g of KClO₃ to prepare a saturated solution of KClO₃.
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Is water from a river or from a well more likely to be clean to drink?
Water from a well is more likely to be clean to drink as compared to the water from river.
What are the sources of drinking water?Source water refers to bodies of water that contribute water to public drinking water sources and private wells (such as rivers, streams, lakes, reservoirs, springs, and ground water).
Water which came from underground sources are clean and well to drink as no impurities were present in that, whereas the water from rivers are not that much of clean as many human activities make them impure.
Hence water from well is clean to drink.
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Select the mass of naoh that is necessary to neutralize 8. 90 mol hcl(aq)
The mass of NaOH that is necessary to neutralize 8.90 mol of HCl is 356 grams.
How we convert moles into mass?Mass of any substance will be calculated from moles by using the below equation as:
n = W/M, where
W = required mass
M = molar mass
Neutralization reaction will be:
NaOH + HCl → NaCl + H₂O
From the stoichiometry it is clear that 1 mole of NaOH is required to neutralize 1 mole of HCl, so that 8.90 moles of NaOH is needed.
Mass of 8.9 moles of NaOH = (8.9mol)(40g/mol) = 356g
Hence required mass of NaOH is 356 grams.
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What statement describes an electrolyte?
What is the molarity of a solution if 1.75 moles of KOH are dissolved in 2.5 liters of water?
Answer: 0.7 M
Explanation:
molarity = (moles of solute)/(liters of solution) = 1.75/2.5 = 0.7 M
police said that there were 5000 grams of H2 in the room. Convert grams of hydrogen into grams of water and see if the was enough.
When we convert 5000 grams of hydrogen into water, the mass of the water obtained is 45000 g
Balanced equation2H₂ + O₂ —> 2H₂O
Molar mass of H₂ = 2 g/mol
Mass of H₂ from the balanced equation = 2 × 2 = 4 g
Molar mass of H₂O = 18 g/mol
Mass of H₂O from the balanced equation = 2 × 18 = 36 g
SUMMARY
From the balanced equation above,
4 g of H₂ reacted to produce 36 g of H₂O
How to determine the mass of water producedFrom the balanced equation above,
4 g of H₂ reacted to produce 36 g of H₂O
Therefore,
5000 g of H₂ will react to produce = (5000 × 36) / 4 = 45000 g of H₂O
Thus, 5000 g of H₂ is equivalent to 45000 g of H₂O
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Which term is defined as long chains of carbon molecules?.
Answer: polymers
Explanation:
Polymers are huge natural molecules are connected with small natural molecules
4.8 L sample of helium gas contains 0.22 moles of helium - How many additional moles of herum gas must be added to the sample to obtain a volume of 6-4L?
Answer:
Explanation:
Las Vegas is a city in the middle of the Mojave Desert. In 1933, the Hoover Dam was built creating Lake Mead, a large water reservoir to the east of Las Vegas. Select all the options that were the primary reason for creating this reservoir.
options:
People needed a place for recreational use of the lake for swimming and boating.
Population was continuing to grow since settlement in the Las Vegas area.
The natural springs were in danger of drying up due to over pumping of the aquifer beneath Las Vegas.
To increase city revenue by encouraging people to come see Hoover Dam, the largest dam in the United States.
Answer:
Natural Springs answer.
Explanation:
Actually valid reason for why the dam was built
What does the atomic weight (mass number) of an element represent? ____________________________ .
Answer:
The atomic weight of an element represents the ratio of the average mass of atoms of a chemical element.