Answer:
787.3 g of CO₂
Explanation:
The combustion of octane is this one:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O
2 moles of octane react to 25 moles of oxygen in order to produce 16 moles of CO₂ and 18 moles of water.
The products in combustion reactions are always CO₂ and H₂O. The oxygen is always a reactant.
We convert mass to moles: 255 g . 1mol /114g = 2.24 moles
2 moles of C₈H₁₈ can produce 16 moles of CO₂
Then, 2.24 moles may produce (2.24 . 16)/2 = 17.9 moles of CO₂
We convert moles to mass:
17.9 mol . 44g/mol = 787.3 g of CO₂
How many molecules are there in 0.655 moles of C6H14
Answer:
[tex]\boxed {\boxed {\sf 3.94 *10^{23} \ molecules \ C_6 H_ {14} }}}[/tex]
Explanation:
1 mole of any substance has the same number of particles: 6.022 * 10²³. This number is as Avogadro's Number.
The particles can be molecules, atoms, formula units, etc. For this problem, the particles are molecules of C₆H₁₄ or hexane.
We can set up a ratio using Avogadro's Number.
[tex]\frac {6.022 *10^{23} \ molecules \ C_6H_{14}}{1 \ mol \ C_6H_{14}}[/tex]
Multiply by the given number of moles: 0.655
[tex]0.655 \ mol \ C_6H_{14} * \frac {6.022 *10^{23} \ molecules \ C_6H_{14}}{1 \ mol \ C_6H_{14}}[/tex]
The moles of hexane will cancel, because one is the "numerator" (techincally 0.655 is over 1) and the other is in the denominator of the ratio.
[tex]0.655 * \frac {6.022 *10^{23} \ molecules \ C_6H_{14}}{1 }[/tex]
[tex]0.655 * {6.022 *10^{23} \ molecules \ C_6H_{14}}[/tex]
[tex]3.94441*10^{23} \ molecules C_6H_{14}[/tex]
The original value of moles has three significant figures, so our answer must have the same. For the number we found, that is the hundredth place.
3.94441The 4 in the thousandth place tells us to leave the 4 in the hundredth place.
[tex]3.94 *10^{23} \ molecules \ C_6H_{14}[/tex]
0.655 moles of hexane is equal to approximately 3.94 *10²³ molecules of hexane.
Draw or sketch something that you might see move. Write a caption that answers the following questions: How would you describe its motion? Is it moving at a constant speed, or does it speed up and slow down?
Answer:
lets say your doing a frog
it jumps it speeds up and then slows down
Explanation:
it takes 125.0ml of 3.5M hydrobromic acid to neutralize 75.0ml of lithium hydroxide. what is the concentration of lithium hydroxide
Answer:
5.83 M
Explanation:
3.5 M * 125.0 ml = M₂ * 75.0ml
437.5 M.ml = M₂ * 75.0 ml
M₂ = 437.5 M.ml / 75.0 ml
M₂ = 5.83 M
Which statement describes the focus of an earthquake?
It creates stress in rock.
It develops in the lithosphere.
It lies above the surface where rock breaks.
It begins about 5 kilometers below Earth’s surface.
Answer:Its B the person above me is correct go thank and rate 5 there answer!
Explanation:
Hope it helps!
One of the most common natural disasters is an earthquake. It results in significant loss of lives and property worldwide each year. The time has come for effective tactics and catastrophe management awareness. It develops in the lithosphere. The correct option is B.
What is earthquake?An earthquake is the sudden release of energy from the earth's crust that causes the earth's surface to shake. Seismic waves, also called S waves, are consequently produced. The type and severity of an earthquake are based on the local seismic activity.
Sudden tectonic changes in the earth's crust are what generate earthquakes. Orogeny, which causes earthquakes and volcanoes, is caused when the tectonic plates glide over one another. Vibrations produced by these disturbances travel in all directions.
All the geological events like earthquakes, volcanoes, etc. mainly occurs in the Lithosphere.
Thus the correct option is B.
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formula of atom bomb
Answer:
It says that the energy (E) in a system (an atom, a person, the solar system) is equal to its total mass (m) multiplied by the square of the speed of light (c, equal to 186,000 miles per second).
Explanation:
If 1.00 L of gas at 1.00 atm of pressure is compressed to a volume of 0.473 L, what is the new pressure of the gas?
Which gas law formula should you use to solve this problem?
-Avogadro’s Law
-Boyle’s Law
-Charles’ Law
Answer:
2.114 atm
Explanation:
Since it is just pressure and volume, use Boyle's Law
P1V1 = P2V2
Then plug in numbers
(1 atm)(1 L) = P2(.473 L)
P2 = 2.114 atm
how many grams are in 4.28 x 10^2 atoms of Ca?
2.85 grams
4.28x10^2 atoms (40.08 grams of Ca/ 6.02x10^23)
how many total atoms are there is a sugar molecule
Answer:
The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, sugar is a carbohydrate
How much energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C?
Answer:
1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C
Explanation:
Crayon is paraffin wax. The specific heat of paraffin wax is 2.14 J/g°C
As we know
[tex]Q = m*c *\Delta T[/tex]
Where
[tex]\Delta T[/tex] is the change in temperature [tex]T_2- T_1[/tex]
m is the mass of the object
c is the specific heat in J/g°C
Substituting the given values, we get -
[tex]Q = 30 * 2.14 *(49-25)\\Q = 1540.8[/tex] Joules
1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C
PLEASE HELP ASAP
Volcanoes erupt as a result of
A) Two continental plates converging
B) One oceanic plate converging with one continental plate
C) Two tectonic plates transforming
Answer:
B.) One oceanic plate converging with one continental plate.
HOPE THIS HELPS!
Answer:
C: Two tectonic plates transforming
How does circulation help maintain body temperature?
Answer:
Answer Below
Explanation:
Your feet and hands are thin compared to the rest of your body. Thin stuff has a large surface area compared to volume. Surface area is where you lose heat and volume is where you generate heat. Because of this, they lose heat quickly and do not generate enough heat to stay warm. To fix this your body also moves heat around from your warm core to your hands and feet using your blood. Your blood is warm. It gets to be that way because it runs through areas, mostly in your torso, that are always warm
Which of the following is not a type of covalent bond?
A. Polar
B. Double
C. Non-polar
D. Quadruple
Answer:
letter b
Explanation:
I dunno if I'm right cuz I'm just a grade five sorry if this can't help
2. What is the mass of 5.33 x 10 moles of aluminum hydroxide?
What is the relationship between the volume of a gas and its pressure?
O inversely proportional
O Directly proportional
O No relationship
O Every gas has a different relationship with pressure
Answer:
inversely proportional
Explanation:
what is amphotheric oxide give me an two instance
Answer:
Amphoteric oxide is an oxide that reacts with both acids and bases. In other words, it possesses both acidic and basic properties. For example both zinc and aluminium are metals but their oxides, ZnO and Al2O3 are amphoteric oxides as they react with both acids and bases.
Explanation:
How many grams of NaOH are needed to make 2.00 L of a 0.200 M solution?
Answer: 16.0 g
Explanation: M(NaOH) = 39.998 g/mol. N = m/M = cV
Mass m = McV = 39.998 g/mol·0.200 mol/l · 2.0 l = 16.0 g
What is the difference between the solid line and the dotted line?
Answer:
it is dotted
Explanation:
What are stationary fronts?
How many grams are in 4.00 moles of Cr2O3?
Answer:
607.9616 grams
Explanation:
Hope this helped!!
Calculate the molarity of a solution that contains 4.7 moles in 5.2 liters.
.9 M
24.4 M
1.1 M
.5 /m
Answer:
0.9M
Explanation:
molarity = mols/L
M=4.7mol/5.2L
= 0.9M
If the volume of a gas at 0.5 atm changes from 150 mL to 75 mL, what is the new pressure?
Answer:
1 atmExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we're finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
We have
[tex]P_2 = \frac{0.5 \times 150}{75} = \frac{75}{75} = 1 \\ [/tex]
We have the final answer as
1 atmHope this helps you
Who develope the device used to measure the magnitude of an earthquake?
A. Art Smith
B.Charles Richer
C.Edward Sheriden
D.James Hutton
Answer:
B
Explanation:
Figure 1 - Charles Richter studying a seismogram. There are a number of ways to measure the magnitude of an earthquake. The first widely-used method, the Richter scale, was developed by Charles F. Richter in 1934.
someone please help meeeee, i’ll help u if u help meeeeeeeeee :)
i need answers for each one of these questions, or an explanation on how to find them on a calculator
Answer:
(9.03x10^-14)x(8.455x10^20)=7.634865x10^7
(5.2x10^11)/(2.10x10^-4)=2.476190x10^15
(7.67x10^12)x(3.8x10^15)=29146000000000000000000000000
(9.237x10^20)/(4.5x10^-6)=2.0526x10^26
Explanation:
What actions could you take to increase the rate of solution for a solid solute that dissolves endothermically in 100g of water?
Answer:
We will increase the temperature for a solution to be dissolved more into water.
To form a solution, energy is required to break the particles. If more energy is required to break the bonds of solute and solvent than the energy is released, then its called endothermic reaction.
For an endothermic solution, we would have to provide heat / temperature (energy) so that more solute can be dissolved in water which can increase the rate of solution.
An inherited behavior or physical characteristics that helps an organism survive and reproduce Natural selection Predation Adaptation Competition
look at pic thanks :D
Answer:
it's natural selection
Explanation:
adaptation is when you adapt to some situation
Cc
( (CC
?
A man and a woman want to have a child, but the man is heterozygous (Ce) for a
recessive trait that causes a fatal illness. What is the probability of a child inheriting the
trait?
a 50%
b. 25%
c. 0%
d. 75%
Answer:
You should be posting this question under the biology tab, but here's the answer nonetheless.
a. 25% (if the woman is Ce)
c. 0% (if the woman isn't Ce)
Network forensics might deal with what? Retrieving photos from a PC Analyzing text messages Investigating a data breach Defragmenting a hard drive
Answer:
Investigating a data breach
Explanation:
A data breach usually involves data exfiltration over a computer network. the other options involve data being stored on a device locally which isn't volatile data like text messages, photos or rearranging data in defragmentation all of which does not require a network.
Jane made this picture to represent a chemical reaction
Which of the following statements best explains the type of chemical reaction represented by Jane's picture?
It represents a synthesis reaction because one combined reactant forms multiple products
Olt represents a synthesis reaction because the same atoms are present in the reactants and products
It represents a decomposition reaction because one reactant breaks apart and forms two products
It represents a decomposition reaction because the total mass of the products is less than the mass of the reactant.
Answer:
It represents a decomposition reaction because one reactant breaks apart and forms two products
Explanation:
Your welcome
To solve such this we must know the concept of redox reaction. Therefore, the correct option is option C. It represents a decomposition reaction because one reactant breaks apart and forms two products.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Decomposition reaction is a chemical reaction where one reactant breaks down into two or more than two products on supplying energy in form of heat or electricity.
Therefore, the correct option is option C. It represents a decomposition reaction because one reactant breaks apart and forms two products.
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A gas initial volume and pressure is 5m^3 and 101320 Pa and allows to expand up to 12m^3 then what is the final pressure?
Answer:
New pressure = 42216.66 Pa
Explanation:
Given that,
Initial volume, V₁ = 5 m³
Final pressure, P₁ = 101320 Pa
Final volume, V₂ = 12 m³
We need to find the final pressure of the gas. We know that the relation between pressure and volume is given by :
[tex]P\propto \dfrac{1}{V}\\\\P_1V_1=P_2V_2\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{101320 \times 5}{12}\\\\P_2=42216.67\ Pa[/tex]
So, the new pressure is equal to 42216.66 Pa.