Answer:
True- Mirror causes van to appear closer
Explanation:
Objects in the rear view mirror appear closer than they really are.
Vision and area are limited by the mirrors.
11. In the diagram below, what will allow more solute to be dissolved in the
solvent?
Which of these could possibly lead to an extinction?
A : adaptation
B : reclamation
C : symbiosis
D : pollution
Answer:
pollution
as all the other terms mentioned are beneficial for our biodiversity
Please help !!!Is this Lewis dot structure correct? Check whether each atom has an octet and whether the total electrons in the structure match the total valence
electrons of the elements. There MUST be a clear yes/no and some evidence of work in your answer
Answer:
The Lewis dot structure is not correct
Explanation:
Each atom ought to be surrounded by eight electrons or two electrons according to the octet rule. We now need to closely examine the structure to see if it fits into this description.
All the atoms in the molecule have the correct valence except the hydrogen which is directly attached to the oxygen.
The positive charge ought to mean that more than two bonds were formed between hydrogen and oxygen which is clearly not the case here.
Thus, the hydrogen atom attached directly to oxygen does not display the correct valence.
when precipitation hits the surface of the earth and makes its way to the sea that is called ?
Answer:
Run Off
Explanation:
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the
percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur
trioxide, 1.55 g of ammonia, and 0.804 g of water.
Answer:
Explanation:
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur trioxide, 1.55 g of ammonia, and 0.804 g of water. Can you please show step by step on how you got the answer thanks!
-
First, the balanced equation:
1 SO3 + 2 NH3 + 1 H2O --> 1 (NH4)2SO4
Find the limiting reactant using molar masses and mole ratios
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) = 0.03135 mol (NH4)2SO4
1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3) = 0.04548 mol (NH4)2SO4
0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O) = 0.04462 mol (NH4)2SO4
Therefore, the limiting reactant is sulfur trioxide.
Now find the theoretical yield of (NH4)2SO4.
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4) = 4.14 g (NH4)2SO4
Actual yield / Theoretical yield x 100% = Percent yield.
Therefore, percent yield = 91.3%
hoppe it helps
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Hence,the percent yield is 91.3%.
What is percent yield ?
The percentage yield displays the amount of product produced in relation to the maximum mass. The proportion of atoms in the reactants that go on to produce the intended product is determined by the reaction's atom economy.
The balanced chemical equation is as follows:
1 SO3 + 2 NH3 + 1 H2O ⇒ 1 (NH4)2SO4
Find the limiting reactant by using molar masses and mole ratios as follows:
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3)
= 0.03135 mol (NH4)2SO4
1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3)
= 0.04548 mol (NH4)2SO4
0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O)
= 0.04462 mol (NH4)2SO4
Hence, the limiting reactant is sulfur trioxide.
Then, find the theoretical yield of (NH4)2SO4.
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4)
= 4.14 g (NH4)2SO4
Actual yield / Theoretical yield x 100% = Percent yield.
percent yield = 91.3%
Thus, the percent yield is 91.3%.
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the number of moles of hydrogen that are needed to produce .253 moles of water
Answer:
454
Explanation:
j
A stable atom that has a large nucleus most likely contains?
O more neutrons than protons.
more protons than neutrons.
O equal numbers of protons and neutrons.
C changing numbers of protons and neutrons.
Answer:
equal numbers of protons and neutrons
A sample of a certain isotope has an initial activity of 40,000 cpm. After 24.8 days, the activity is 2500 cpm. What is the half life of the isotope?
Answer:
6.2 days
Explanation:
initial activity = 40,000 cpm
one half-life = 20,000 cpm
two half-lives = 10,000 cpm
three half-lives= 5,000 cpm
four half-lives = 2500 cpm
24.8 days/4 half-lives = 6.2 days/ half-life
What is 25 Ml into L
Answer:
0.025 liters
Explanation:
divide 25 into 1000
Answer:
25 mL = 0.025 L
Explanation:
edge 2023
When water pours over a waterfall?
Charles's law describes the relationship of the volume and temperature of
gas at a constant mass and pressure. According to this law, what would
happen to the temperature of the gas if its volume decreased from 1.0 L to
0.50 L?
O A. The temperature would decrease by 500 K.
O B. The temperature would double.
O C. The temperature would be reduced by half.
O D. The temperature would increase from 500 K to 1000 K.
Answer:
The temperature would be reduced by half
Explanation:
Charles' Law => V ∝ T => V = kT => k = V/T
For two sets of T vs V conditions, the system constant (k) remains unchanged and k₁ = k₂ => V₁/T₁ = V₂/T₂.
Therefore, if V₁ is reduced to 1/2V₁ = V₂ => V₁/T₁ = 1/2V₁/T₂ => V₁/T₁ = V₁/2T₂
and solving for T₂ => 1/T₁ = 1/2T₂ => 2T₂ = T₁ => T₂ = 1/2T₁
∴ The initial temperature (T₁) would be reduced by half or, T₂ = 1/2T₁
Hydrogen bonding occurs when hydrogen is bonded to N, O, or F. Which of the following molecules has hydrogen bonding, when bonding with
their same molecules?
A. CBr4
O B.H2S
C. NO2
OD. NH3
Answer:
I think the answer is……
O B.H2S
Explanation:
I’m not sure tho, I’m just not 100% positive.
PLEASE help
which of the following ions is in a higher oxidation state than their normal ion?
a. none of these
b. F-
c. Mg2+
d. H2+
Answer:
b
Explanation:
because it has gained an electron
[tex]F^-[/tex] ion is in a higher oxidation state than its normal ion. Hence, option B 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.
The atoms of elements are not always neutral i.e. carry no charge. They sometimes carry either positive or negative charges to become ions.
[tex]F^-[/tex] is in a higher oxidation state than its normal ion because it has gained an electron.
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determine the total pressure of a gas mixture that contains oxygen at a pressure of 150 mmHg, nitrogen at 350mmHg, and helium at 200 mmHg
Answer:
Total pressure is the sum of all partial of all components
150mmHg + 350mmHg + 200mmHg = 700mmHg
700mmHg = 0.92atm
how to deal with gender based violence as an individual
Answer:
Raise awareness of the dangers of harmful traditions. ...
Tackle violence against girls in school. ...
Challenge and speak out about violence in the home. ...
Transform attitudes towards harmful practices at multiple levels. ...
Listen to girls' experiences of violence - and their solutions.
Which type of energy transfer allows the Sun to warm Earth?
C. Radiation is the answer.
As it can happen in vacuum also
Answer: Radiation
Explanation:
I need help with these questions fast plz no links!!!!
Answer:
c
B
B
I Hope u can understand and it's correct answer
Which yield comes from measurements obtained during a real experiment?
A) actual yield
B) theoretical yield
C) percent yield
Answer:
A) actual yield
Explanation:
Actual yield is the amount of product that is actually produced in a chemical reaction.
Theoretical yield is the amount of product expected based on stoichiometry.
Per cent yield is the actual yield over the theoretical yield.
Pls answer ill give brainliest question in picture
Answer: A & D
Explanation:
The two main forces are temperature and salinity.
Separation of mixtures by removing a layer of liquid
Answer:
Decantation
Explanation:
Question 21
Which equation is a balanced chemical equation?
A
2NaOH + CaBr2 + Ca(OH)2 + NaBr
B
NO + Cl2 → NOCI
с
CaCO3 + CaO + 2CO2
D
2AlCl3 + 3Mg + 3MgCl2 + 2A|
D
B
Ос
ОА
Answer:
the equation is not correctly written but the answer is option D
The balanced equation among the given options is D, where each of the elements are equal in number on both side.
What is balanced reaction?A balanced chemical equation for a reaction represents perfect stoichiometric ratios of each reactants and products. Each elements have to be equal in number on both sides.
The number of elements or groups can be balanced each side by multiplying with suitable integers. The chemical equation in D is balanced where, Al, Cl and Mg are balanced on both side.
The equation in A, is not balanced where, number of Na and Br are not balanced. In equation B Cl is two in reactant side and one in product side. Thus, not balanced. Similarly in option C, oxygen and calcium are not balanced. Therefore, option D is correct.
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DUE IN 10 MIN!!
Module 5: Directions: Respond to this question to demonstrate your understanding of the topic/content. Be sure to provide adequate and relevant details learned in the module to support your response. Pay close attention to organizing your response so it makes sense and uses correct grammar. Your response should be at least 5-7 sentences at a minimum.
Question: Na + Cl2 --> NaCl
If you were given 15 grams of sodium (with excess chlorine) and asked to determine the amount of NaCl that would be produced (in grams), how would you go about doing it. Be as specific as possible and include numerical values when necessary.
Answer:
I would first convert the grams of sodium into moles of sodium using its molar mass. Next, I would use the ratio of Sodium Chloride to Sodium in the given chemical equation to cancel out the moles of Sodium that I just obtained and get the moles of Sodium Chloride. Finally, using the molar mass of Sodium Chloride, I would cancel out the moles of Sodium Chloride to get the grams of Sodium Chloride.
A 11.0g sample of a compound containing only oxygen and carbon produce 3.0g carbon and 8.0g oxygen. Determined the empirical formula of the compound?
Answer:
Empirical formula: CO₂
Explanation:
The empirical formula is defined as the simplest ratio of atoms present in a molecule. We must convert the mass of carbon and oxygen to moles as follows:
Carbon -Molar mass: 12.01g/mol-
3.0g * (1mol / 12.01g) = 0.250 moles C
Oxygen -Molar mass: 16g/mol-
8.0g * (1mol / 16g) = 0.50 moles O
The ratio of O:C is:
0.50mol / 0.250mol = 2
That means the empirical formula is:
CO₂Which best describes a radioactive isotope?
Answer:
A radioactive isotope, also known as a radioisotope, radionuclide, or radioactive nuclide, is any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays.
Answer:
unstable
Explanation:
If you sprain your ankle and place a cold pack on it, how does the motion of molecules in your ankle change?
Answer:
that heat energy speeds up the motion of the particles and the temperature of the reaction
Explanation:
HOPE IT HELPS
When we place an ice pack on a sprained ankle, the blood flow is reduced which prevents further swelling, ice reduces the blood flow which is necessary when the ankle is injured.
What happens after placing an ice pack?The flow of blood and the lymph vessel is limited or decreased after applying an ice pack, this is an immediate first aid to be given to the injured person
After 2-3 days of the injury, a hot pack should be applied to increase the blood flow and the lymph flow for an activity.
Hence, the molecule flow is reduced after applying an ice pack to the sprained ankle
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Infer: Why might a zone of upwelling be a good place to fish?
First lets define upwelling
Upwelling- a rising of seawater, magma, or other liquid
In this case, you would be looking at a river, lake, ocean, or other body of water good for fishing.
You'd want to look for a place with upwelling because when there is a rise of water, the sea creatures within it will rise too. So the fish in the bottom of a lake for example would be brought up to the surface of the water or near the surface which is where your fishing rod is trying to grab the fish.
I hope this helps! Don't be afraid to reach out with any further questions!
the name for the following formula C9H18 should be
O octane
O octene
O nonane
O nonene
Answer:
cyclononane C9H18 nonane
How many grams of manganese (III) iodide (Mn13) will be needed to make 1.3 grams of hydrogen iodide (HI)? g MnI3
Answer:
I dont know
Explanation:
I need it to
What is the product of the unbalanced equation below?
H2(g) + Cl2(9) ►
A. H2(g) + Cl2(9)
B. HCl2(9)
C. HCI(9)
O D. H2C12(9)
Answer:
C. HCI(g)
Explanation:
The following equation between hydrogen gas (H2) and oxygen gas (O2) is given below:
H2(g) + Cl2(g) ►
Based on these unbalanced equation, the products of the reaction was not given, however, if one molecule of hydrogen and oxygen combine, hydrogen chloride (HCl) should be produced as the product of the reaction as in:
H2(g) + Cl2(9) ► 2HCl(g)
Why is creativity important in science?
