Answer:
A. a
B. c
C. b
D. d
Explanation:
What is the name of the revolutionary book Darwin published?
(will mark brainliest) pls don’t scam - due today! these are my last points please answer
Answer:
A
Explanation:
It's know things
Answer:
Gregor mendel
Explanation:
He is considered by most the father of gentics
8. How are convection currents in the mantle (geosphere) and in the oceans (hydrosphere) similar? How are they different? Answer:
Answer:
Mantle convection is the slow creeping motion of Earth's rocky mantle caused by convection currents carrying heat from the interior of the earth to the surface while convection current in ocean in; Solar radiation affects the oceans: warm water from the Equatortends to circulate toward the poles, while cold polar water heads towards the Equator. The surface currents are initially dictated by surface wind conditions. The trade winds blow westward in the tropics, and the westerlies blow eastward at mid-latitudes. This wind pattern applies a stress to the subtropical ocean surface with negative curl across the northern hemisphere, and the reverse across the Southern Hemisphere. The resulting Sverdrup transport is equator ward.Because of conservation of potential vorticity caused by the poleward-moving winds on the subtropical ridge's western periphery and the increased relative vorticity of poleward moving water, transport is balanced by a narrow, accelerating poleward current, which flows along the western boundary of the ocean basin, outweighing the effects of friction with the cold western boundary current which origniates from high latitudes
Explanation:
A major component of gasoline is octane. When liquid octane is burned in air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. Calculate the moles of octane needed to produce 2.40 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits.
Answer:
0.267 mol
Explanation:
The unbalanced equation for the reaction that takes place is:
C₈H₁₈ + O₂ → H₂O + CO₂Once we balance it we're left with:
2C₈H₁₈ + 25O₂ → 18H₂O + 16CO₂Using the stoichiometric ratio of water and octane from the balanced reaction, we can convert mol of water into mol of octane:
2.40 mol H₂O * [tex]\frac{2molC_8H_{18}}{18molH_2O}[/tex] = 0.267 mol C₈H₁₈Thus 0.267 moles of octane are needed to produce 2.40 mol of water.
Hey please answer this...
Answer:
594.6005021gHCl
Explanation:
[tex]734.0gNO(\frac{1molNO}{30.006gNO})=24.46177431molNO\\24.46177431molNO(\frac{4molHCl}{6molNO})=16.30784954molHCl\\\16.30784954molHCl(\frac{36.461gHCl}{1molHCl})=594.6005021gHCl[/tex]
Answer:
594.6005021gHCl
Explanation:
Which sentence in the picture is true please help me with this
Answer:
C (top to bottom) or the 3rd one
Explanation:
Choose the BEST answer from the four options A, B, C, or D: Due to which property of LPG are we asked to close the valve of the gas cylinder, in the kitchen in our homes? A. It is inflammable B. It is a liquid C. It has a bad smell D. It is a mixture
Answer:
A
Explanation:
We are usually asked to close the valve of the gas cylinder in our various kitchens at home due to the inflammable property of the Liquified Petroleum Gas.
Without closing the valve, the LPG would diffuse into our homes, and any form of spark would cause an explosion and lead to a fire. Lives and properties could be lost in the process.
The correct option is A.
Someone please help me with this question!!!
Answer: Element 1, 3, and 4
I hope this helps, and stay safe! :)
Answer:
1, 3 and 4
Explanation:
14. The noble gases in Group 18 are very reactive. *
O True
O False
Answer: the answer is True
Explanation:
13
Help lol please thanks
Answer:
Mass = 15.13 g
Explanation:
Given data:
Number of atoms of hydrogen = 8.11×10²³
Mass of ammonia formed = ?
Solution:
Chemical equation:
3H₂ + N₂ → 2NH₃
Number of moles of hydrogen:
1 mole contain 6.022× 10²³ atoms
8.11×10²³ atoms × 1 mol / 6.022× 10²³ atoms
1.35 mol
Now we will compare the moles of hydrogen and ammonia:
H₂ : NH₃
3 : 2
1.35 : 2/3×1.35 = 0.89 mol
Mass of ammonia:
Mass = number of moles × molar mass
Mass = 0.89 mol × 17 g/mol
Mass = 15.13 g
4. The temperature of a fixed mass of gas in a rigid container is decreased from 127.00
degrees Celsius to 27.0 degrees Celsius. The initial pressure was 1.5 atm. Which is
closest to the new pressure after cooling?
A) 0.5 atm
B) 1 atm
C) 2 atm
D) 2.5 atm
Can you explain how you got the answer as well ?
Answer:
B) 1 atm
Explanation:
According to Gay-Lussac's law, the pressure of a given amount of gas at constant volume is directly proportional to its temperature (in Kelvin). This is mathematically expressed as:
P₁/T₁ = P₂/T₂
From the problem, we have the following data:
P₁= 1.5 atm
T₁= 127 °C + 273 = 400 K
T₂= 27 °C + 273 = 300 K
Thus, we calculate P₂ - final pressure - as follows:
P₂ = P₁/T₁ x T₂ = (1.5 atm)/(400 K) x 300 K = 1.125 atm
Therefore, the option which is closest to the new pressure after cooling is B) 1 atm
Three separate companies produce lye, a strongly basic compound used mainly to produce soap and detergents. Each company uses a slightly
different method but charges the same amount per gram of theoretical yield. The company with the highest efficiency will be the cheapest to
purchase from. You work for Dirt-Be-Gone, a detergent company and must choose which lye company to give a contract to. You purchase one
unit of lye from each company to compare their efficiency.
Company 1: Theoretical yield of 12,000 grams, actually produces 8,476 grams per reaction.
Company 2: Theoretical yield of 9,000 grams, actualy produces 7892 grams per reaction.
Company 3: Theoretical yield of 7,000 grams, actually produces 4885 grams per reaction.
Who will you choose to provide your company with lye?
A. Company 3
B. Company 2
C. All are equal
D. Company 1
I'll choose Company 2 to provide my company with lye
Further explanationGiven
Company 1 : Theoretical yield :12,000 grams, actually 8,476 grams
Company 2 : Theoretical yield :9,000 grams, actually 7892 grams
Company 3 : Theoretical yield :7,000 grams, actually 4885 grams
Required
compare their efficiency and choose the company
Solution
To determine which company to choose, we must calculate how much percent yield each company produces. The greater the yield, the greater the efficiency. The company that has the most efficiency will be selected
% yield can be formulated :
[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%[/tex]
Company 1[tex]\tt \%yield=\dfrac{8476}{12000}\times 100\%=70.63\%[/tex]
Company 2[tex]\tt \%yield=\dfrac{7892}{9000}\times 100\%=87.69\%[/tex]
Company 3[tex]\tt \%yield=\dfrac{4885}{7000}\times 100\%=69.79\%[/tex]
Company 2 has the most efficiency
What is the wavelength of a photon of light with an energy of 5.2 eV? Please answer in nm.
1 eV = 1.60 x 10-19 J
Speed of light -3.0 x 108 m/s
Planck's constant = 6.626 x 10-34 Js
A destructive change that is not caused by people
A. Climate
B. Natural disaster
C. Severe weather
D. Latitude
Answer:
Natural Disaster
Explanation:
Answer:
B and C
Explanation:
Natural disasters can be very destructive along with severe weather. Both mixed would be quite bad for us.
which molecule in plants cells first captures the radiant energy from sunlight?
A. glucose
B. carbon dixide
C.chlorophyll
D.adenosine triphosphate
Answer:
c tell me if im wrong:)
Explanation:
:)
The molecule in plants cells first captures the radiant energy from sunlight is chlorophyll. The correct option is C.
What is chlorophyll?Chlorophyll, any of the pigments that participate in photosynthesis, the process by which light energy is converted to chemical energy through the synthesis of organic compounds.
Almost all photosynthetic organisms, including green plants, cyanobacteria, and algae, contain chlorophyll.
Chlorophyll is the name given to the green pigment used by plants to produce food during the photosynthesis process.
Chlorophyll is essential for photosynthesis, which allows plants to absorb light energy. Chlorophyll molecules are arranged in and around photosystems embedded in chloroplast thylakoid membranes.
Chlorophyll is the molecule in plant cells that first captures the radiant energy from sunlight.
Thus, the correct option is C.
For more details regarding chlorophyll, visit:
https://brainly.com/question/13500580
#SPJ2
2) What does aerobic respiration mean?
a) Using oxygen to turn glucose into ATP
b) NOT using oxygen to turn glucose into ATP
c) digestion
d) Working out
Answer:
the answer is d gs5hkdr o
nvm
What is the mass of 4.5 moles of nitrogen gas
n = m / M
m = n × M
Nitrogen (N2) - a gas is always with an index 2 if we don't have shown how many molecules are there
m (N2) = 4,5 mol × (2×14.007 g/mol)
m (N2) = 4,5 mol × 28.014 g/mol = 126.063g
if you don't solve with the decimals in class just replace 14.007 with 14
also if you haven't learned abour gasses aways having index 2 then:
m (N2) = 4,5 mol × 14.007 g/mol = 63.0315g
in what organelle does photosynthesis occur
Answer:
chloroplasts
Explanation:
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
One proposed cause of warming climates is a drastic increase in carbon found in the air and oceans. Which of the following causes of weathering is also be caused by
increased carbon in the atmosphere?
A. acid rain
B. oxidation
C. exposure to salt water
D. ice formation
Answer:
Acid Rain
Explanation:
Carbon dioxide lowers the pH in the atmosphere, causing it to become more acidic, which can lead to acid rain. This is also why the oceans are becoming more acidic as more carbon dioxide builds up.
HF is a week acid. What particles would you expect to find in a solution of HF(aq)?
HF, H+ and F- particles
HF particles only
H+ and F- particles
H+ particles only
Answer:
HF, H+ and F- particles
Explanation:
The particles expected to be in an aqueous solution of a weak acid, HF, would be HF, H+ and F- .
A weak acid is one that does not dissociate completely in aqueous solutions. Hence, the dissociated particles are in equilibrium with the solution of the acid itself.
Thus, for weak acid, HF:
HF ⇌ H+ + F-
The inner core of Earth is solid iron and nickel. Iron and nickel will melt at temperatures around 1,500°C. The average
temperature of the inner core is about 5,000°C. Why then, does the inner core not melt and become a liquid?
O A. The inner core isn't hot enough to melt iron or nickel.
OB. It is impossible to melt iron or nickel because they are metals.
C. The extreme pressure at the center of the Earth keeps the core solid.
D. The outer core is so cold that it keeps the inner core solid.
Answer:
maybe C?
Explanation:
srry if wrong
hope it helps
Answer: C.
Explanation:
A. Is out because we know that it can melt iron and nickel B. Is out because metal is most definitely meltable
And for D. Between 8,132° and 9,932° Fahrenheit Is the temperature of the outer core
What two things impact density of ocean water
Answer:
Temperature and salinity
Explanation:
help please in picture
Answer:
4 and 6
Explanation:
im not sure tho i dont nw much bout cs
when 0.15 moles of sodium reacts with 0.30 moles of oxygen what is the moles of the product formed when one reagents is used in excess
Answer:
0.075 moles of product formed.
Explanation:
Given data:
Number of moles of oxygen = 0.30 mol
Number of moles of oxygen = 0.15 mol
Number of moles of product formed = ?
Solution:
Chemical equation:
4Na + O₂ → 2Na₂O
Now we will compare the moles of Na₂O with oxygen and sodium.
Na : Na₂O
4 : 2
0.15 : 2/4×0.15 = 0.075 mol
O₂ : Na₂O
1 : 2
0.30 : 2/1×0.30 = 0.6 mol
Less number of moles of Na₂O are produced by sodium thus it will limit the yield of Na₂O and act as limiting reactant while oxygen is in excess.
Which of the following statements about glaciers is true?
A. A single alpine glacier covers the island of Greenland.
B. Alpine glaciers are usually larger than continental glaciers.
C. Continental glaciers cover immense areas of land.
D. All of these choices are correct.
Answer:
The correct answer is D.
Glaciers fall into two groups: alpine glaciers and ice sheets. Alpine glaciers form on mountainsides and move downward through valleys. The largest ice sheets, called continental glaciers, spread over vast areas. Today, continental glaciers cover most of Antarctica and the island of Greenland.
Explanation:
Brainliest please?
Can two elements be used as reactants for a synthesis reactions?
Answer:
Two or more elements or compounds combine to form one product.
Explanation:
Yes, two elements can be utilized as reactants for synthesis reactions.
Both components of something like the equations should have a similar number of particles. A synthesis reaction could sometimes produce upwards of two products, could also yield binary chemicals.Such reactions are also among the primary kinds of chemical processes, along with single/double displacement, as well as combustion processes.
Thus the above response is correct.
Learn more about synthesis reactions here:
https://brainly.com/question/10451730
What is the total mass shown on the triple beam balance scale?
A.163.5 g
B.253.5 g
C.263.5 g
D.283.5 g
Answer:
263.5
Explanation:
Add everything
Which group contains the most elements?
a. Transition elements
b. Nonmetals
c. Metalloids
d. Metals
Answer:
it is metals, it is the most prominent type of element on the table
ANSWER
C,METALLIODS
SORRY PO KUNG MALI
#CARRYONLEARNING
What are the 10 metals?
Answer: Metals:-
1) Gold
2) Silver
3) Iron
4) Copper
5) Nickel
6) Aluminum
7)Mercury( Liquid metal)
8) Titanium
9) Radium
10) Californium
Non-metals:-
1) Diamond
2) Sulphur
3) Graphite
4) Carbon
5) Iodine
6) Tincture
7) Bromine (liquid non-metal)
8) Phosphorus
9) Silicon
10) Boron
Hope this helps..... Stay safe and have a Merry Christmas!!!!!!!! :D
Explanation:
How many atoms of N are in 0.755 mol of N2? ( mole conversion)
The number of atoms N in 0.755 mol of N₂ : 9.09 x 10²³
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
moles of N in 0.755 mol N₂ :
[tex]\tt 2\times 0.755=1.51~moles[/tex]
The number of atoms N :
[tex]\tt 1.51\times 6.02\times 10^{23}=9.09\times 10^{23}~atoms[/tex]
