Answer:
The reaction takes place is
2 (C2H6) + 7 (O2) → 4(CO2) + 6(H2O)
According to the equation,
60g ethane requires 7x32= 224g oxygen
here ethane is in excess.oxygen will be consumed completely.
hence
2.9 g O2 will consume 60×2.9/224=0.776g of C2H6
now,
2 moles of C2H6 produces 4 moles of CO2!
60g ethane produces 4x44 g CO2
hence amount of CO2 produced =4×44×0.776/60=2.27g
Look at each Lewis Dot Diagram for the following elements. How many electrons are needed to fill the outer shell?
The number of electrons are needed to fill the outer shell of the given figures are 4,1 & 3 respectively.
What is Lewis dot structure?Lewis dot structure shows the boding within the molecule by showing the number of electrons and lone pairs present in each atoms present in that molecule.
As we know that bonding in any molecule takes place to complete the octet configuration of outer most shell and get stability.
In the figure (1), 4 electrons are shown in the outer shell then we need 4 electrons to complete the octet.In the figure (2), 7 electrons are shown in the outer shell then we need 1 electron to complete the outer most shell to complete the octet.In the figure (3), 5 electrons are shown in the outer shell then we need 3 electrons to complete the outer most shell to complete the octet configuration.Hence required no. of electrons are 4,1 & 3 respectively.
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Which of the following describes the skill level of a graduate of a doctorate program?
O expert
O competent
O novice capable
Answer:expert
Explanation:
How is ice cream made???? Hurry plsss!!!
Answer:
Milk, cream, milk solids, sugars, modifying agents and flavourings are blended together in stainless steel vats.
The mix is homogenised to create a consistent texture.
The mix is pasteurised by heating at 82-85°C for 15 seconds then cooled to destroy bacteria.
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It is necessary to develop alternative sources of energy because____.
scientists are uncertain of how long the resources will last.
scientists are certain of how long the resources will last.
only a select group of people have information on our resources.
scientists have estimated how long the resources will last.
Answer:
scientists are uncertain of how long the resources will last.
Explanation:
It is hard to estimate how long certain natural resources will last because they are dependent upon the rate of consumption and other factors. There are many fields of studies going into alternative energy. Since the technology needed for some of these ideas will take time to be developed, alternative sources of energy must be found before the resources we already have run out.
Answer: A. scientists are uncertain of how long the resources will last.
Explanation:
We are looking into many other types such as: Solar, Nuclear, Water, Etc.
The pen on seismograph swings freely.
It was believed that Earth was a stationary object at the center of the universe. All other objects in space were thought
to go around Earth. Which of these is a criticism of this idea?
A)
Years on Earth are regular periods of three hundred sixty five days each
B)
Earth's shadow falling on the moon shows that Earth is actually spherical,
rather than flat
The moon goes around Earth, resulting in different phases of the moon
that can be seen from Earth
D
There are four seasons on Earth only because Earth is tilted at its axis and
it goes around the sun
Answer: A) years on Earth are regular periods of three hundred sixty five days each
The criticism of the given idea is that there are four seasons on Earth only because Earth is tilted at its axis and it goes around the sun.
What are seasons?A season is a division of the year based on changes in weather, ecology, and the number of daylight hours in a given region. On Earth, seasons are the result of the axial parallelism of Earth's tilted orbit around the Sun. In temperate and polar regions, the seasons are marked by changes in the intensity of sunlight that reaches the Earth's surface, variations of which may cause animals to undergo hibernation or to migrate, and plants to be dormant.
The Northern Hemisphere experiences most direct sunlight during May, June, and July, as the hemisphere faces the Sun. The same is true of the Southern Hemisphere in November, December, and January. It is Earth's axial tilt that causes the Sun to be higher in the sky during the summer months, which increases the solar flux.
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What is the potential difference across a light bulb when there is 32 A of current and 8 Ω of resistance from the filament.
Answer:
force ε: the increase in potential energy per unit charge provided by the chemical reactions in the battery. And the voltage difference across the light bulb is: ∆V = I R = (0.06 A)(20 Ω) = 1.2 V ▪If we measure the voltage difference across the battery or the light bulb, we will get 1.2 V.
Explanation:
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Question Megan made a model of the respiratory system using a water bottle and balloons. When she pulled down on the balloon stretched across the bottom of the bottle, the balloon hanging inside the bottle inflated. What organ does the balloon hanging inside the bottle represent?
Answer:
The lung
Explanation:
The model of the respiratory system made by Megan consists of two balloons. The first balloon stretched across the bottom of the bottle represents the diaphragm which contracts and relaxes to allow air in and out of the lungs. The balloon inside the bottle represents one lung.
Breathing in causes the balloon inside the bottle to be filled with air. This is preceded by the expansion of the diaphragm which makes the lungs to be filled with air. Breathing out causes a contraction of the diaphragm thus making the lungs to let out air.
Answer:
You're Lungs
Explanation:
When you breathe in, air flows into your lungs. When you breathe out, air flows out of your lungs. The balloon inside the bottle is like one of your lungs.
Can someone help me out with why is the outer core of Earth is important in you’re own words?! A mini paragraph plsss
Answer:
the outer core is important because the outer core is responsible for earth's magnetic field which protects earth from harmful particles that comes from sun and also contains some natural metal like nikle and iron.
is this much paragraph enough comment down below..
hope this helps you ☺️☺️
How can you provide a better explanation of what was happening that made the pie pans fly off the Van de Graaff generator?
Answer:
Due to repulsion.
Explanation:
Repulsion among electrons is responsible for fly off the pie pans from the Van de Graaff generator. When the globe of the generator charges up, the charge will move to the top part of the pie tin. The top region of pie tin accumulates charge and since it is not fixed at one place like upper half of the globe itself, it will be repelled by electrostatic forces between electrons that leads to fly off so we can say that similar charge of electrons is responsible for this fly off.
How do differences in
electronegativity and molecular shape
make some molecules more able to
absorb heat?
Answer:
So, higher electronegativity helps atoms take more control over shared electrons creating partial negative regions and partial positive regions which result in dipoles that cause polarity. The molecule's polarity will be determined on the negative and positive regions on the outer atoms in the molecule
A student measures out 5 mL of calcium chloride solution into a small container and 5 mL of sodium carbonate solution in another small container. The total mass of both chemicals and the containers they are in is 15.5 g. When the student combined the two clear liquids, a gooey, cloudy precipitate formed. What would the total mass of the products and the two containers be after this reaction took place?
Answer:
15.5g
Explanation:
"The total mass of both chemicals and the containers they are in is 15.5 g." After a chemical reaction, by conservation of mass, the total mass of the products and the two containers after reaction is the same at 15.5g.
Answer:
15.5
Explanation:
in a chemical reaction, mass is conserved
so mass after reaction = mass before reaction = 15.5 g
At 390 K, the pressure of a sample of nitrogen is 2.07 atm. What will the
pressure be at 480 K
Answer:
190k 100 on the test
Explanation:
What type of reaction is this?
Answer:
Decomposition
What is the [OH-] in a solution that has a pH = 9.23? *
O 1.7x10^5
O 8.2x10^-9
1.7x10^--5 M.
Answer: 1.7x10^-5
Explanation:
pH + pOH = 14
14 - pH = pOH
14 - 9.23 = 4.77
pOH =4.77
[OH-] = 10^-pOH
= 10^-4.77
= 1.698243x10^-5
= 1.7x10^-5
How do you make crack and what are its effects?
If anyone is taking Integrated Physics and Chemistry (2014) on sos can u pls help me w something !! Thanks
I am so sorry i cant help but good luck
(b) Why is nitrogen used for storage of semen
in artificial insemination?
Examine the model of a metallic bond.
What do the smaller circles represent?
o the cations held in place by the attractive forces within the sea of electrons
O the delocalized electrons that are free to move around the positive cations
the distinct and rigid bond between the different metal atoms
the unshared pairs of electrons of the metal atoms involved in the metallic bond
Answer:
b the delocalized
Explanation:
it could be the right answer
Which of the following equations is balanced?
2H2 + O2 + 4H20
4Na + O2 - 2Na20
Fe2O3 + H2 - 2Fe + 3H20
CH4 + O2 - CO2 + H20
Answer:
4Na + O2 - 2Na20Is the balanced equations .
Students investigating chemical reactions conducted the experiment you see here. An antacid tablet was dropped into a plastic bag containing 10 ml distilled water at 22oC. The bag was immediately zipped closed and the chemical reaction proceeded until completion. Based on your knowledge of chemical reactions, choose all of the statements below would apply?
A) the tablet completely disappeared.
B) The total mass at the completion of the experiment is 16.72g.
C) The mass of the products is slightly less than the mass of the reactants.
D) A decrease in the mass of the products in the result of the production of a gas.
E) Evidence of a chemical reaction includes the production of something new: a gas
Answer: B and E
Explanation:
The chemical reactions are all around us. Here for the given reaction the tablet completely disappeared and evidence of a chemical reaction includes the production of something new: a gas. The correct options are A and E.
A chemical reaction is defined as the reaction in which the bonds are broken within the reactant molecules and the new bonds are formed within the product molecules. In a chemical reaction the compounds interact to form new substances called products.
In a chemical reaction, a chemical change must occur which is generally observed with precipitation, heat formation, etc.
Thus the correct statements are options A and E.
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How do we see the color violet
Answer:
Violet is scattered most by Earth's atmosphere, but the blue cones in our eyes aren't as sensitive to it. While our red cones aren't good at seeing blue or violet light, they are a bit more sensitive to violet than our green cones.
Explanation:
4. How many moles of Ca(HCO3)2 are present in 4.6 liters of a 3.5 molarity
solution?
this refers to the speed of an object at a specific moment in time
Answer:
Instantaneous speed is the speed of an object at a specific moment in time
What is the molarity of a solution which contains 0.80 mol of HCl in 250mL of
solution?
Answer:
3.2M HCl Solution
Explanation:
Molarity = moles of solute / volume of solution expressed in liters
moles of solute = 0.80 moles HCl
volume of solution = 250 ml = 0.250 Liter
Molarity (M) = 0.80 moles HCl / 0.250 Liters = 3.2M HCl Solution
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Different stimuli create various reactions in our bodies. Name the three types of stimuli. For two of these, give an example.
Answer:
three types of stimuli consists of
Mechanical,
thermal,
and chemical.
Explanation:
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Match the environmental stresses to what would happen in the chemical reaction. Think through the path from the carbon cycle - how CO2 is removed from the atmosphere and stored in sinks and then how CO2 is released from sinks and/or produced.
(Picture attached)
Answer:
coz would be equal so you would need co3 instead
Explanation:
Answer:
Explanation:
1. Shift towards products
- Decrease in no. of cars
- Decrease in no. of farms
2. Shift towards reactants
- Decrease in shellfish
- Loss of trees
- Increase in earth's temperature
What pressure will be needed to reduce the volume of 77.4 L of helium at 98.0kPa to a volume of 60.0L?
Answer:
126 kPaExplanation:
The final pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we're finding the final pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
98 kPa = 98,000 Pa
We have
[tex]P_2 = \frac{98000 \times 77.4}{60} = \frac{7585200}{60} \\ = 126420[/tex]
We have the final answer as
126 kPaHope this helps you
When are atoms considered stable?
when they have satisfied the law of conservation of mass naturally or through bonding to obtain
full valence shells
when they have satisfied the octet rule naturally or through bonding to obtain full valence shells
when their valence electrons have "fallen" back to ground state through bonding
Answer:
when they have satisfied the octet rule naturally or through bonding to obtain full valence shells
Explanation:
Generally, most atoms of an element are unstable because they have a void in their electron shell to fill, hence, they need to react with other elements to fulfil this task of octet.
Octet rule states that atoms of elements engage in reactions to form compounds so they can have eight (8) valence electrons in their shell. Noble gases e.g argon, neon etc. are elements that have naturally satisfied this octet rule by possession of 8 valence electrons in their shell. Other elements that do not have this naturally becomes reactive and enter bonding with other atoms to obtain full valence shells.
When a strong acid is placed into water, what percentage of hydrogen ions (H+) will dissociate into the solution?