Answers
Answer:
a is 16 as the molar ratio is 4:2=2:1
b is 10 as the ratio is 4:2
Related Questions
Use the periodic table to identify the element indicated by each electron configuration by typing in the
chemical symbol for the element.
Answers
Answer:
Explanation:
1s22s22p6: Ne 1s22s22p63s23p3: P 1s22s22p63s23p64s1: K 1s22s22p63s23p64s23d8: Ni 1s22s22p63s23p64s23d104p65s24d3: Nb
We have that an element indicated by its electron configuration, we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus
Hence using the Periodic table to read the its Atomic Number
The Periodic table is categorized using the atomic number of elements and symbols are to aid search as well
For an element indicated by its electron configuration we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus
Hence using the Periodic table to read the its Atomic Number
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Pls help me this is my last question
Answers
Answer: how much mass is in a certain amount of space
Explanation: density is g/mL; therefore it’s the mass (g) in a certain amount of space (mL)
Answer:
the answer would be how much mass is in a certain amount of space
Explanation:
If 0.500 moles of silver nitrate were consumed, how many moles of calcium nitrate would be produced?(make sure to balance the chemical equation first)
AgNO3 + CaCl2 → Ca(NO3)2 + AgCl
Answers
Answer:
Explanation:
AgNO3 + CaCl2 ⇒ Ca(NO3)2 +AgCl
2AgNO3 + CaCl2 ⇒ Ca(NO3)2 + 2AgCl
Which of these solutions has the highest vapor pressure at 25°C?
A. 0.10 Molar C6H1206
B. 0.10 Molar NaF
C. 0.10 Molar MgCl2
D. 0.10 Molar K3P04
Answers
Solution :
We know, In an electrolyte solution, the number of dissolved particles is larger because the solute breaks apart into ions. The greater the number of ions, the larger the impact on colligative properties will be.
So, the compound which will dissociate into more number of electrolyte has more vapour pressure.
Out of all given compound K₃PO₄ have highest number of particles after dissociation.
Hence, D) is the required solution.
If an ecosystem is left alone after a disturbance, it will gradually change from being mostly competitive to being mostly cooperative. True or false?
true
false
plsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss answer with one of the options
Answers
Answer:
false
Explanation:
Answer:
True
Explanation:
I did the test, and I answered "false".... It was the wrong answer :(
I think the right anwser is "True" because after a disturbance an ecosystem can recover back its balanced state, so the organisms start to cooperate again.
what going on in each spot
Answers
nothing ksbsshshhzvsjajbsjshjsgdvdjhsbsj
Answer:
I don't know lol
Why is the C-14/C-12 ratio used to date once-living organisms?
A. C-12 becomes radioactive when an organism dies.
B. The amount of C-12 changes when an organism dies.
C. The half-life of C-14 changes when an organism dies.
D. An organism stops taking in carbon when it dies.
Answers
Drag the tiles to the correct boxes to complete the pairs.
Match each mineral with its main function in the body.
Answers
Answer:
Hello calcium maintains healthy bones and muscles. Zinc is for immune function. Iron carrier oxygen to blood. Sodium maintains fluid balance in the body.
Answer: Zinc : plays a role in immune system function
Iron: carries oxygen to all body tissues
Calcium: Maintains healthy bones and muscles
Sodium: maintains fluid balance in the body
Explanation: Got it right on PLATO/edmentum
In the food chain below, what energy is available to the wolf?
A. Some of the energy transferred from the Sun, to the grass, to the deer.
B. All of the energy transferred from the Sun, the grass, and deer.
C. All of the energy transferred from the Sun to the grass.
D Some of the energy transferred from the Sun, but none from the grass or the deer.
Answers
Answer: A
Explanation:
The sun will give energy to the grass, giving the ability to grow. The deer will then come along and eat the grass transferring some of that energy to the deer, giving it the energy to do it's daily activities, then the wolf will eat the deer, only transferring some of the energy to the wolf, because the deer had ahead used some of the energy and it came out as feces ect.
A mixture of He, Ne, and N2 gases has a pressure of 1.943 atm. If the pressures of He and Ne are 0.137 atm and 0.566 atm, respectively, what is the partial pressure of N2 in the mixture?  A. 0.703 atm  B. 1.24 atm  C. 0.151 atm  D. 1.943 atm
Answers
Answer:
The parcial pressure of N₂ in the mixture is 1.24 atm.
Explanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
PT = PA + PB
This relationship is due to the assumption that there are no attractive forces between the gases.
In this case:
PT=PHe + PNe + PN₂
You know:
PT= 1.943 atmPHe= 0.137 atmPNe= 0.566 atmPN₂= ?Replacing:
1.943 atm= 0.137 atm + 0.566 atm + PN₂
Solving:
1.943 atm= 0.703 atm + PN₂
1.943 atm - 0.703 atm= PN₂
1.24 atm= PN₂
The parcial pressure of N₂ in the mixture is 1.24 atm.
Please answer correctly I still need help on this. I will give brainliest (No links or fake answers will receive no brainliest)
How many grams of AlCl3 are needed to completely react with 2.25 of NaOH?
Answers
Hope the picture help u understand I did it in steps so it would be easier to understand:)
Question 4 of 10
Which molecule is hexanal?
ОА, НС
ОН
В.
||
Ос. Н?
нсон
D.
Answers
Answer:
Hexanal, once commonly called caproic aldehyde, is a six-carbon straight-chain aldehyde. It is a clear liquid with an atmospheric-pressure boiling point of 131 ºC
Answer:
the answer is B the biggest one
Explanation:
How much heat does it take to turn water from -30 degreesC to 120 degreesC?
If you actually know the answer please tell me! ASAP!!!
Answers
Answer:
110 degrees C
Explanation:
110 degrees
is your answer
500 ml of 3.31 M HCl is mixed with 56.1 g NaOH to produce water and table salt.
What mass of NaCl is produced?
ss
Answers
Answer:
m=1,48g
Explanation:
Th following diagram is an example of a(n) [Hurry!!]
A. Covalent Bond
B. Ionic Bond
C. Metallic Bond
Answers
The following diagram is an example of a(n) [Hurry!!]
A. Covalent Bond ✓ answer
B. Ionic Bond
C. Metallic Bond
Answer:
This is the diagram of covalent bond
Separation of mixtures by removing a layer of liquid
Answers
Answer:
Decantation
Explanation:
Please help me school ends tomorrow
Which scenario describes a transfer of mechanical energy to heat and sound energy?
Question 7 options:
A)
a plant using energy from the sun to create food
B)
a very high pitched sound causing a glass to break
C)
talking into a microphone.
D)
clapping hands
Answers
Answer:
D) clapping handsExplanation:
hope it's helpful
4. How is ethanol made?
A. By fermenting sugars and starches
B. By composting grass cuttings and dinner table scraps
C. By boiling water and corn oi
D. By releasing carbon dioxide into the atmosphere
O
Answers
If you produce 35.7 grams of sodium chloride how many molecules of Chlorine gas were
needed?
2Na + Cl2 --> 2NaCl
(PLS HELP)
Answers
Answer: [tex]7.36\times 10^{23}[/tex] number of molecules of chlorine gas are needed.
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of sodium chloride = 35.7 g
Molar mass of sodium chloride = 58.44 g/mol
Plugging values in equation 1:
[tex]\text{Moles of sodium chloride}=\frac{35.7g}{58.44g/mol}=0.611 mol[/tex]
The given chemical equation follows:
[tex]2Na+Cl_2\rightarrow 2NaCl[/tex]
By the stoichiometry of the reaction:
If 1 mole of sodium chloride is produced from 2 moles of chlorine gas
So, 0.611 moles of sodium chloride will be produced from = [tex]\frac{2}{1}\times 0.611=1.222mol[/tex] of chlorine gas
According to the mole concept:
1 mole of a compound contains [tex]6.022\times 10^{23}[/tex] number of molecules
So, 1.222 moles of chlorine gas will contain = [tex]\frac{6.022\times 10^{23}}{1mol}\times 1.222mol=7.36\times 10^{23}[/tex] number of molecules
Hence, [tex]7.36\times 10^{23}[/tex] number of molecules of chlorine gas is needed.
Wetlands provide habitats for many living things because of their sheltered waters and what other feature?
Answers
Answer:
large supply of nutrients.
Explanation:
In a wetland, the soil is covered by water or is almost covered by water. This water may be coming upwards from an underground aquifer. Wetlands are covered by water for most of the year.
They are sheltered waters and do provide habitats for many living things.
Nutrients such as; Carbon sulfur, phosphorus, carbon, and nitrogen are cycled within the soil of wetlands hence wetlands have a large supply of nutrients.
Pls help
Three gases are added to a single tan of the same size. The first gas is currently at 303.9kPa, the second at 1900tor and the third at 132.3PSI. To one
decimal place, what are the percentages for each gas of the total pressure in the tank?
Answers
Answer:
See Explanation
Explanation:
We must first convert the gas pressures to a common unit. I choose to convert all pressures to kiloPascal.
Since;
1 kilopascal = 7.501 torrs
X. =1900tor
X= 1900 × 1/7.501
X= 253.3 Kpa
Since 1 PSI =6.895 kilopascals
132.3PSI = 132.3 × 6.895/1
= 912.2 Kpa
Total pressure = 303.9kPa + 912.2 Kpa + 253.3 Kpa = 1468.8 kPa
For first gas;
303.9/1468.8 × 100 = 20.7%
For second gas;
912.2/1468.8 × 100 = 62.1%
For the third gas;
253.3/ 1468.8 × 100 = 17.2%
[tex]what \: is \: sound \: \: {?} [/tex]
Answers
Answer:
In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain.
Explanation:
this is what i found hope it helps :)
Answer:
Sound is a form of energy which is caused due to the vibration of an object.
help please ? i’m being timed andnjdjd
Answers
Answer:
the last 2
Explanation:
pls mark me brainliest
Scientists have observed that hurricanes are strongest over water, and that hurricanes lose momentum and become weak when they reach land. Which statement best explains this observation?
The ocean tides provide energy to hurricanes.
The ocean winds provide energy for hurricanes.
The warm water provides moisture for hurricanes.
The Coriolis Effect provides moisture for hurricanes.
Answers
Answer:
Explanation:
The warm water provides moisture for hurricanes so that hurricanes are strongest over water, and become weak when they reach land.
What is hurricane?Hurricanes are forceful winds in the air which are able to destroy even a land completely. One of the most destructive forces on earth is the hurricane. Although the process of a origin of hurricane is complex.
They need water that is at least 80 degrees first. Air that is wet is the second component. Finally, for a hurricane to form, there must be convergent winds.
A group of thunderstorms moving across the ocean's surface signal the start of the real process. Similar to how a straw absorbs liquid, when the surface water is heated, the storm absorbs heat energy from the water. The air becomes moistened as a result.
The storm can develop into a hurricane if the wind conditions are right. The fuel is this thermal energy. Hence, option c is correct.
To find more on hurricanes, refer here:
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Which of the following diagram is the correct electron dot diagram for AL
Answers
Answer:
the answer is a
Explanation:
Earth's surface is shaped and changed in many ways. Which of these can shape Earth's surface?
water
wind
ice
gravity
organisms (living things)
the sun
none of these
all of the above
Answers
Explanation:
Water- moves across soil and breaks down pieces of rocks
Wind- can blow materials around, such as rocks or sand. Also it can dry out soil.
Ice- carries broken rocks or soil to different places and can cause glacier erosion.
Gravity- thinking about it, earth is the one place with gravity so if gravity changed it can cause objects to move. Also it determines the shape of the earth because the center has more gravitational pull. This gives it a very round shape.
Organisms- more animals means increase of destruction of plants, which can lead to faster erosion.
Sun- the sun is very important. If the earth didn’t get any sunlight there wouldn’t be any life on the planet itself. Which makes it lack rocks, plants, weather, and the atmosphere.
And by that point it’s just not none of the above.
Hospital patients are administered oxygen from an pressurized
hyperbaric oxygen chamber. 600.0 L of oxygen is compressed in a
cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at a
pressure of 3.0 atm?
Answers
Answer:
32000atm
Explanation:
Using Boyle's law equation;
P1V1 = P2V2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (
V2 = final volume (L)
According to the question below:
P1 = 160.0 atm
P2 = 3.0 atm
V1 = 600L
V2 = ?
Using P1V1 = P2V2
160 × 600 = 3 × V2
96000 = 3V2
V2 = 96000/3
V2 = 32000atm
Too much Carbon Dioxide in the atmosphere is a bad
thing. However, too little is also bad. Explain why it is important
for Carbon Dioxide to always exist in the atmosphere. Give specific examples of what it is used for to support your response.
Answers
Answer:
CO2 is an evil necessary element. co2 is needed for our survival. we need food for survival and food is produced by the plants through photosynthesis. for photosynthesis to take place co2 is one of the vital element. so no co2,no photosyntheseis maeans no food. no food no one will survive.
. Element X has a nucleon (mass) number of 19 and a proton (atomic) number of 9.
To which group in the Periodic Table does it belong?
a ] I
B] III
C] VII
D] 0
Answers
Answer:
C
Explanation:
it belong to that group as it needs 1 electron to be chemically stable
How many particles are in 7.07x10^-6 moles of a substance?
Answers
Answer:
4.25*10^18
Explanation:
1 mole =6.023*10^23 particles
so 7.07*10^-6 mole=6.023*10^23*7.07*10^-6 particles=4.25*10^18 particles