Answers
Answer:
its A
Explanation:
The only one that makes sense
Related Questions
Why is it important for scientists to monitor meteors in the sky?
Answers
Answer:
Because You never know when a meteor will hit you.
If 175.6 joules of energy are applied to a sample of Aluminum and its temperature changed by 35.4 degrees then what was the weight of the Aluminum sample?
Answers
Answer:
5.51g
Explanation:
Using the following formula:
Q = m × c × ∆T
Where;
Q = amount of heat in Joules
m = mass/weight of Aluminum
c = specific heat of Aluminum (0.900 J/g°C)
∆T = change in temperature.
Based on the information given in this question, Q = 175.6 joules, ∆T = 35.4°C, c = 0.900 J/g°C.
Using, Q = m × c × ∆T
175.6 = m × 0.900 × 35.4
175.6 = 31.86m
m = 175.6/31.86
m = 5.51g
The weight of the aluminum sample is 5.51g.
Famous people who talked about plastic water bottles
Answers
Actively promotes an ocean-friendly lifestyle: one that eliminates single-use plastic water bottles, and incorporates sustainable seafood choices, as well as products that keep pollutants out of the ocean. Actively works with the Surf Rider Foundation. Marisa Miller is an activist who cares about clean oceans.
James Cameron, Director of Terminator, Titanic and Avatar
Supports ocean conservation and played a key part in getting president Obama to create the world’s largest ocean sanctuary.
Miguel Bosé, singer
Collaborates with Oceana and has participated in the initiative Pristine Seas by National Geographic. He is one of the main Spanish activist celebrities in favor of the oceans and clean oceans and has been key in promoting ocean conservation projects in Ecuador, Colombia and Costa Rica.
Top 10 celebrities that care about the oceans
Adrian Grenier, actor and director
Passionate ocean advocate reducing his use of single use plastics and appeal for everyone to commit to “conscious consumption” through changing personal habits.
Pierce Brosnan, actor
Who can save our oceans if not James Bond? Played a key part in the documentary “Oceans” and activist in saving our oceans and marine life.
Jack Johnson, singer
He contributes in numerous NGOs and initiatives for the planet, including 1% For The Planet, Climate Counts, Heal the Ocean, Live Earth, Waterkeeper Alliance and others. He has recently filmed The Smog of the Sea, a short film that documents a week-long expedition to explore the problem of plastic pollution in the ocean.
Almudena Fernández, model and eco-activist
She has worked with Greenpeace’s campaign to stop the pollution of the seabed and she is Al Gore’s spokeswoman in Spain. She cares about clean oceans.
Top 10 celebrities that care about the oceans
Leonardo DiCaprio, actor
His foundation plays a key role in ocean conservation and informing the public (most recently with the award winning film Before the Flood) about how we can save the world.
Richard Branson, businessman
He is a well-known celebrity in the fight against carbon emissions and keeping the sea levels low, having committed more than $3bn over the next ten years to help combat global warming. Together with James Cameron, he has also started the initiative Ocean Elders to protect, value, and celebrate the ocean and its wildlife.
Jason Mraz, musician
He is active in many ocean conservation projects from organizations such as the Surfrider Foundation and the Natural Resources Defense Council. He was also interviewed for Sea Voices, a book to unite and inspire people around the world for the health of the ocean.
A 17.11 gram sample of an organic compound containing only C, H, and O is analyzed by combustion analysis and 21.71 g CO2 and 5.926 g H2O are produced. In a separate experiment, the molar mass is found to be 104.1 g/mol. Determine the empirical formula and the molecular formula of the organic compound. Enter the elements in the order C, H, O empirical formula
Answers
Answer: The empirical formula and the molecular formula of the organic compound is [tex]CHO[/tex] and [tex]C_4H_4O_4[/tex] respectively.
Explanation:
The chemical equation for the combustion of hydrocarbon having carbon, hydrogen and oxygen follows:
[tex]C_xH_yO_z+O_2\rightarrow CO_2+H_2O[/tex]
where, 'x', 'y' and 'z' are the subscripts of Carbon, hydrogen and oxygen respectively.
We are given:
Mass of [tex]CO_2[/tex] = 21.71 g
Mass of [tex]H_2O[/tex]= 5.926 g
Molar mass of carbon dioxide = 44 g/mol
Molar mass of water = 18 g/mol
For calculating the mass of carbon:
In 44g of carbon dioxide, 12 g of carbon is contained.
So, in 21.71 g of carbon dioxide, =[tex]\frac{12}{44}\times 21.71=5.921g[/tex] of carbon will be contained.
For calculating the mass of hydrogen:
In 18g of water, 2 g of hydrogen is contained.
So, in 5.926 g of water, =[tex]\frac{2}{18}\times 5.926=0.658g[/tex] of hydrogen will be contained.
Mass of oxygen in the compound = (17.11) - (5.921+0.658) = 10.53 g
Mass of C = 5.921 g
Mass of H = 0.658 g
Mass of O = 10.53 g
Step 1 : convert given masses into moles.
Moles of C =[tex] \frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{5.921g}{12g/mole}=0.493moles[/tex]
Moles of H=[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.658g}{1g/mole}=0.658moles[/tex]
Mass of O=[tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{10.53g}{16g/mole}=0.658moles[/tex]
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =[tex]\frac{0.493}{0.493}=1[/tex]
For H =[tex]\frac{0.658}{0.493}=1[/tex]
For O=[tex]\frac{0.658}{0.493}=1[/tex]
The ratio of C : H: O = 1: 1: 1
Hence the empirical formula is [tex]CHO[/tex].
empirical mass of CHO = 12(1) + 1(1) + 1 (16) = 29
Molecular mass = 104.1 g/mol
[tex]n=\frac{\text {Molecular mass}}{\text {Equivalent mass}}=\frac{104.1}{29}=4[/tex]
Thus molecular formula = [tex]n\times {\text {Empirical formula}}=4\times CHO=C_4H_4O_4[/tex]
As NH4Cl dissolves in water, and cools the solution,
a. delta H is negative, and delta S is negative
b. delta H is positive, and delta S is negative
c. delta H is negative, and delta S is positive
d. delta H is positive, and delta S is positive
Answers
Answer:
D. delta H is positive, and delta S is positive
Which of the following is not among the elements to include on your note cards?
I. a number to identify the card and link it to a bibliography card
II. the subject (if you know what it is)
III. publishing information about the work in question
IV. your notes
A. II
B. I
C. IV
D. III
Answers
Answer:
c
Explanation:
Answer:
The answer is C
Explanation:
True or Fase. Every substance has to be classified as either acid or base?
Answers
Answer:
False
Explanation:
Some substances don't have to be
hellooooooooooooooooooooo
Answers
Answer:
hiiiiiiiiiiiiiiiiiiiiiiiii THANK YOU SO MUCH FOR THE POINT
How many moles of iron will be produced from 6.20 moles of carbon monoxide reacting with excess iron oxide
Answers
Explanation:
..........................m
The map shows the movement pattern for major ocean currents. What ideas do you have about what might make ocean
currents move?
Please help
Answers
Answer:
Currents are physical occurrences or factors that put motion into oceans, making them move back and forth.
Such factors include but may exceed the following:
WindVariation in water mass densities (this is caused by alterations in temperature and salinity levels)GravityEarthquakes or stormsWhen there is movement in ocean currents, heat, nutrients, water oxygen levels are also affected.
Cheers
what is the method of seperating inmisible liquid
Answers
Based on the picture of the map, why does Buenos Aries have a higher ocean surface temperature than Cape Town even though they have the same latitude?
Answers
How many moles of Mg(OH)2(aq) would be required to neutralize 6.0 mol HCl(aq)?
Answers
Answer:
[tex]3.0molMg(OH)_2[/tex]
Explanation:
Hello there!
In this case, for these types of acid-base neutralizations, it is crucial to firstly set up the chemical reaction taking place between the acid and the base; in this case HCl and Mg(OH)2 respectively, whose products are obtained by switching around the anions and cations as shown below:
[tex]HCl(aq)+Mg(OH)_2(aq)\rightarrow MgCl_2(aq)+H_2O(l)[/tex]
Which must be balanced to accurately predict the mole ratio on the reactants side:
[tex]2HCl(aq)+Mg(OH)_2(aq)\rightarrow MgCl_2(aq)+2H_2O(l)[/tex]
Whereas we can see a 2:1 mole ratio of the acid to the base; thus, the moles of Mg(OH) required for the neutralization of 6.0 moles of HCl turn out to be:
[tex]6.0molHCl*\frac{1molMg(OH)_2}{2molHCl} \\\\=3.0molMg(OH)_2[/tex]
Best regards!
The Moon shines white light on Earth. Is the Moon a good blackbody
radiator? Why?
O A. Yes, because the light from the Moon comes from the Sun, which
is a blackbody radiator
B. No, because white light is only one wavelength of light, not a range
of wavelengths
O C. No, because the Moon reflects most of the Sun's light rather than
absorbing it
O D. Yes, because each night the Moon warms up enough to emit
visible light at a range of wavelengths
Answers
Answer:
C.) No, because the Moon reflects most of the Sun's light rather than
absorbing it
Explanation:
:p
HELP ME PLEASE ITS DUE TODAY
Answers
Answer:
Explanation:
S2Si
O2
C2H4
N2
CBr4
S2
I think these are correct
with a well labeled diagram explain the stages of meiosis and mitosis
Answers
Answer:
hope that helps
What is the Electron Center Geometry of a CH3 carbon.
Answers
Answer:
tetrahedral geometry
CHCH2O- CH2CH3Explanation:
There are several centers of interest. Each carbon with all single bonds is the center of a tetrahedral geometry.
How many grams of magnesium
sulfate (MgSO4) are dissolved in
0.965 L of a 0.0575 M solution?
Molar Mass Mg: 24.30 g/mol
Molar Mass S: 32.06 g/mol
Molar Mass O: 16.00 g/mol
Answers
Answer:6.68
Explanation:
Which statement describes the appearance of a
temperature-vs.-time graph?
A horizontal line shows that the temperature
increases at a constant rate over time.
O. A vertical line shows that the temperature
decreases at a constant rate over time.
Horizontal lines where the temperature is
constant during phase changes connect
upward-sloping lines where the temperature
increases.
Horizontal lines where the temperature
increases are connected by upward-sloping
lines where the temperature is constant for
each phase.
Answers
Answer: C. Horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increase.
Explanation:
Answer:
C
Explanation:
What is the kinetic energy of a bicycle with a mass of 11 kg traveling 8 m/s?
Answers
What is the kinetic energy of a bicycle with a mass of 11 kg traveling 8 m/s ?
Answer:-Mass (m) of a bicycle is = 11 kg
Speed (v) of a bicycle is = 8 m/s
Kinetic energy (K.E) of a bicycle is = ?
Since, we know,
[tex] { \boxed{\rm \red {K.E \: = \frac{1}{2} mv²}}} [/tex][tex] \bf K.E \: = \frac{1}{2} \: × \: 11 \: kg \: × \: (8 \: m/s)² [/tex]
[tex] \bf K.E \: = \frac{1}{2} \: × \: 11 \: kg \: × \: 64 \: m²/s²[/tex]
[tex] \bf K.E \: = \frac{704}{2} \: kg \: m²/s² [/tex]
[tex] \bf K.E \: = \: 352 \: kg \: m²/s² [/tex]
The kinetic energy (K.E) of a bicycle is 352 kg m²/s². [Answer]When 3.915 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 12.74 grams of CO2 and 3.913 grams of H2O were produced. In a separate experiment, the molar mass of the compound was found to be 54.09 g/mol. Determine the empirical formula and the molecular formula of the hydrocarbon.
Answers
Answer: The empirical formula and the molecular formula of the hydrocarbon is [tex]C_2H_3[/tex] and [tex]C_4H_6[/tex] respectivley.
Explanation:
The chemical equation for the combustion of hydrocarbon having carbon, hydrogen and oxygen follows:
[tex]C_xH_y+O_2\rightarrow CO_2+H_2O[/tex]
where, 'x', 'y' are the subscripts of Carbon, hydrogen
We are given:
Mass of [tex]CO_2[/tex] = 12.74 g
Mass of [tex]H_2O[/tex]= 3.913 g
Molar mass of carbon dioxide = 44 g/mol
Molar mass of water = 18 g/mol
For calculating the mass of carbon:
In 44g of carbon dioxide, 12 g of carbon is contained.
So, in 12.74 g of carbon dioxide, =[tex]\frac{12}{44}\times 12.74=3.474g[/tex] of carbon will be contained.
For calculating the mass of hydrogen:
In 18g of water, 2 g of hydrogen is contained.
So, in 3.913 g of water, =[tex]\frac{2}{18}\times 3.913=0.435g[/tex] of hydrogen will be contained.
Mass of C = 3.474 g
Mass of H = 0.435 g
Step 1 : convert given masses into moles.
Moles of C =[tex] \frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{3.474g}{12g/mole}=0.289moles[/tex]
Moles of H=[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.435g}{1g/mole}=0.435moles[/tex]
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =[tex]\frac{0.289}{0.289}=1[/tex]
For H =[tex]\frac{0.435}{0.289}=1.5[/tex]
The ratio of C : H = 1: 1.5
The whole number ratio will be = 2: 3
Hence the empirical formula is [tex]C_2H_3[/tex].
The empirical weight of [tex]C_2H_3[/tex] = 2(12.01)+3(1.008)= 27.04 g.
The molecular weight = 54.09 g/mole
Now we have to calculate the molecular formula.
[tex]n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{54.09}{27.04}=2[/tex]
The molecular formula will be=[tex]2\times C_2H_3=C_4H_6[/tex]
In solution, strong acids and bases ionize completely, but weak acids and bases ionize only partially.
Answers
Answer:
A weak acid is one that does not dissociate completely in solution; this means that a weak acid does not donate all of its hydrogen ions (H+) in a solution. ... Therefore, the concentration of H+ ions in a weak acid solution is always less than the concentration of the undissociated species, HA.
Explanation:
Hope it helps
FOLLOW MY ACCOUNT PLS PLS
Which of the following describes the role of water in supporting the chemical reactions that occur within various life forms?
It is a non-polar molecule with weak hydrogen boding.
It is critical in the process of cellular respiration.
It has a huge electronegativity difference between its atoms.
It allows sunlight to pass through it.
Answers
Answer:
It's critical in the process of cellular respiration
It is critical in the process of cellular respiration; is the correct answer; as water plays a very important role in transportation of oxygen and maintaining cell structure.
What is cellular Respiration ?The process by which organisms combine food molecules with oxygen to form energy , which is used for life sustaining activities is called Cellular Respiration.
Carbon Di-Oxide and Water are produced as by products.
Water acts as a solvent in facilitating the transport of oxygen in respiration.
At the molecular level, water permits everything inside the cell to have the proper structure which is very important for biological processes.
Hence option B , i.e. It is critical in the process of cellular respiration; is the correct answer.
To know more about Cellular Respiration
https://brainly.com/question/13721588
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Acetic acid has the molecular formula CH3COOH. How many atoms of oxygen are there in 60 grams of acetic acid?
Answers
Answer:
1.2046x10²⁴ atoms
Explanation:
First we convert 60 grams of acetic acid into moles of acetic acid, using its molar mass:
60 g ÷ 60 g/mol = 1 molThen we double the number of acetic acid moles, as there are two oxygen moles per acetic acid mole.
1 mol CH₃COOH * 2 = 2 mol OFinally we convert moles into number of atoms, using Avogadro's number:
2 mol O * 6.023x10²³ atoms/mol = 1.2046x10²⁴ atomsWhich contains more reducing sugars, apple or cheese?
Answers
Answer:
An apple.
Explanation:
Hope this helps.
4. How many moles of NaOH(s) would be required to react with 1.90 g of Cu(NO3)2 (aq)
according to the balanced equation:
Cu(NO3)2(aq) + 2 NaOH(aq) → Cu(OH)2(s) + 2 NaNO3(aq)
Answers
Answer:
2.03 x 10⁻² mol NaOH
Explanation:
First step for these questions is to ensure the reaction is balanced, then use the periodic table to determine the molar mass for the reactant you are given. Use the ratio from the balanced equation and dimensional analysis to solve. See attached image
Methane (CH4) undergoes combustion. Which products form? please help will give brainliest if correct
Answers
Answer:
B. CO₂ and H₂O.
Explanation:
When any organic substance undergoes complete combustion, it produces carbon dioxide (CO₂) and water (H₂O).
In the case of methane, the balanced reaction is:
CH₄ + 2O₂ → CO₂ + 2H₂OWith the above information in mind the correct answer is option B. CO₂ and H₂O.
When the combustion is incomplete, carbon monoxide (CO) is produced as well.
Answer:
B. CO₂ and H₂O!
went to the creamery and got a malted milkshake. What type of carbohydrate did I eat?
Answers
Choose the appropriate electron configuration for an element that has electrons in six orbitals.
Group of answer choices
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s1
1s2 2s2 2p5
Answers
Answer:
pagtoon og imo dotsExplanation:
pagtoon og imo dotsAn alpha particle is an ionized helium nucleus, consisting of 2 protons and 2 neutrons bound together. When alpha particles are beamed toward a thin metal foil, most of them pass through, undergoing a small deflection, while a small fraction of them bounce back at much larger angles in excess of 90 degrees relative to their incoming direction. The reason this happens is that Group of answer choices
Answers
Answer:
Due presence of empty as well as heavy particles.
Explanation:
The main reason for this is the presence of empty spaces as well as heavy particles in the nucleus of Helium atom. Most of the beam pass through the helium atom due to the presence of empty spaces in the atom whereas some beams deflect from the helium atom because both repel each other due to same charge i.e. positive charge. Few beams of light bounce back with an angle of 90 degree due hitting with the nucleus where heavy particles such as neutron and proton are present.