Answer:
D. Gases have weak intermolecular forces between them
1. Hummingbirds eat approximately 43.0 g of sugar water per day How many moles of carbon dioxide are released daily by a hummingbird's respiration? C_12H_22O_11 + 12O_2 ------> 12CO_2 + 11H_2O
Answer:
1.507 moles of CO₂ are released daily by a hummingbird's respiration
Explanation:
The reaction of production of carbon dioxide and water from sugar is:
C₁₂H₂₂O₁₁ + 12O₂ → 12CO₂ + 11H₂O
Where 1 mole of sugar produce 12 moles of CO₂
Molar mass of sugar (To convert the mass to moles) is:
12C = 12ₓ12.01g/mol = 144.12g/mol
22H = 22ₓ1.01g/mol = 22.22g/mol
11O = 11ₓ16g/mol = 176g/mol
144.12 + 22.22 + 176 = 342.34g/mol
Thus, moles of 43.0g of sugar are:
43.0g ₓ (1mol / 342.34g) = 0.1256 moles of sugar.
As 1 mole of sugar produce 12 moles of CO₂:
0.1256 moles of sugar ₓ (12 moles CO₂ / 1 mol sugar) =
1.507 moles of CO₂ are released daily by a hummingbird's respiration
How does temperature affect the rate of a reaction?
A. Increasing the temperature decreases the potential energy of the
reactants.
B. Increasing the temperature gives the molecules more kigetic
energy
C. Increasing the tek perature increases the concentration of the
reactants
D. increasing the per perature lowers the activation energy of the
reaction
The elements least likely to form bonds are found in which group?
Answer:
Noble gases are a unique set of elements in the periodic table because they don't naturally bond with other elements.
Explanation:
HAVE A GOOD DAY!
Answer:
The answer is Noble Gases!!
Explanation:
Hope i helped yall! Have a super fantastic day!! Play Among Us! (Of course when your done with school) lol, jk, but u can!! Byes yall!
Identify the following as an example of a physical or chemical. Olive oil, vinegar, salt, and pepper are shaken together together to make salad dressing
Answer:
Chemical Change
Explanation:
Mixing these elements together creates a chemical change
Making of a salad dressing is a physical change as there is no change in the chemical composition.
What is a physical change?
Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.
Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.
They involve only rearrangement of atoms and are often characterized to be changes which are reversible.
Learn more about physical changes,here:
https://brainly.com/question/17931044
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Why is chemistry a science, but alchemy was not?
Answer: Because alchemy was based on mystical belief instead of the scientific method.Soo.. Chemistry uses experiments to test ideas whereas alchemy used superstitious practices.
Explanation:
Answer:
that was because Alchemy was based on experimentation and had little basis in Science, while Chemistry utilizes both experimentation and scientific practices.
Explanation:
Formula los siguientes compuesto: Dietil eter, Etanol, Propanotriol, Acido Propanodioico, Pentanal, Pentano-2,4-diona, Metanoato de metilo, Ciclohexano-1,3-diol, Acido heptanoico, Ciclobutil metil éter, acetato de etilo, 2-metilbenzaldehído, Ciclohexanona, Butanona
Answer:
Explanation:
En este caso para formular los compuestos, debes identificar el grupo funcional principal de la molecula. Una vez que eso está hecho, puedes intentar formularlo.
Empezaremos primero identificando el grupo funcional principal de la molécula, para luego formularlo correctamente.
Dietil eter: la terminación eter al final significa que pertenece al grupo de los éteres, el cual tiene como formula general R - O - R.
Etanol: debido a que termina en ol, este grupo pertenece a los alcoholes. Para formularlo solo se dibuja la molecula del etano, junto a un enlace con el grupo OH, como su formula general R - OH.
Propanotriol: igualmente termina en ol, por lo tanto es un alcohol, sin embargo, en este caso, tambien tiene la terminación prefija tri, asi que significa que hay 3 grupos OH en la molecula.
Acido propanodioico: esta es sencilla, porque empieza como acido, y solo hay un grupo funcional que empieza así y son los acidos carboxilicos, es decir, el grupo COOH (R - COOH) que es el carboxilo. Tiene el prefijo di, antes del oico, por lo que son dos carboxilos presentes en la molecula.
Pentanal: el sufijo al, significa que pertenece al grupo de los aldehidos, en este caso, posee el grupo carbonilo H - C = O.
Pentano - 2,4 - diona: la terminación ona significa que pertenece al grupo de las cetonas, (R - CO - R), parecido a los aldehidos, con la diferencia de que tiene grupos alquilos en lugar de un hidrogeno.
Metanoato de metilo: la terminación ato de ilo, pertenece a los esteres, (R - COOR) derivado de los acidos carboxilicos.
De aqui en adelante solo mencionaré los grupos funcionales pues ya se explicó el por que, por sus terminaciones:
Ciclohexano - 1.3 - diol: este pertenece a los alcoholes.
Acido heptanoico: acido carboxilico
Ciclobutil metil eter: eteres
Acetato de etilo: ester
2-metilbenzaldehído: aldehído unido a un grupo aromatico como el benceno.
Ciclohexanona: un ciclo (cadena cerrada) unido a un grupo carbonilo.
Butanona: cetona.
Observa la foto adjunta para que veas la formulación de cada una:
pls help me 13 min left if you go past and not help are not mine
Answer:
mushroom
mold
spore cases
hyphae
fungus
Question 28 (2 points)
Which of the following is part of the Kinetic Molecular Theory?
1) gases consist of tiny particles that are close together
2) gas molecules are in constant random motion
3) Il of the above are part of the Kinetic Molecular Theory
4) the average kinetic motion of gas molecules decreases with an increase in
temperature
Marook nie
Answer:
Il of the above are part of the Kinetic Molecular Theory
Explanation:
Answer: Which of the following are part of kinetic-molecular theory?
Choices:
1. The particles in a solid do not move.
2. The particles in a liquid are moving past one another constantly.
3. The particles in gas move freely in all directions.
4. The particles in a solid vibrate in a fixed position.
5. The particles in a solid are far apart.
6. The particles in a gas have few attractions between them.
7. The particles in all states of matter are always moving.
Explanation: Which of the following are part of kinetic-molecular theory...
Answers:
2. The particles in a liquid are moving past one another constantly.
3. The particles in gas move freely in all directions.
4. The particles in a solid vibrate in a fixed position.
6. The particles in a gas have few attractions between them.
7. The particles in all states of matter are always moving.
On many common appliances, there is an “O” or “I” on the power switch. What does each symbol mean?
Which answer best describes what is happening in the following redox reaction?
4Fe + 302.
2Fe2O3
Answer:
Iron is oxidized to form rust.
Explanation:
Consider the reaction; 4Fe + 302------>2Fe2O3, we can see that iron is being oxidized to iron III oxide. Rust is the common name of iron III oxide.
Rusting is an electrochemical process, iron rusts when it comes into contact with air and water because electrochemical cells are set up at the surface of contact.
Iron usually functions as the anode in the electrochemical process. This process leads to the formation of iron III oxide. Rust is soft and breaks off easily thereby exposing the metal below the surface to further rusting.
Answer:
Iron is oxidized to form rust.
Explanation:
edge
The mass number of Fo? is 56. How many neutrons are there in a single Fo? atom?
28
30
56
58
Answer: A. 28
If we aren't talking about an isotope, then the number of neutrons and the number of protons in the nucleus are the same. Each proton weighs one atomic unit, and the same can be said about a neutron as well. So half of the weight is from the protons and half is from the neutrons. The electrons are extremely small relative to the protons that their weight is negligible.
what mass of methanol is produced when 280.2 g of carbon monoxide reacts with 50.5 g of hydrogen? CO(g)+2H2(g)—> CH3OH(l)
Answer:
320.23g of CH3OH.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
CO(g) + 2H2(g)—> CH3OH(l)
Next, we shall determine the masses of CO and H2 that reacted and the mass of CH3OH produced from the balanced equation. This is illustrated below below:
Molar mass of CO = 12 + 16 = 28g/mol
Mass of CO from the balanced equation = 1 x 28 = 28g
Molar mass of H2 = 2x1 = 2g/mol
Mass of H2 from the balanced equation = 2 x 2= 4g
Molar mass of CH3OH = 12 + (3x1) + 16 + 1 = 32g/mol
Mass of CH3OH from the balanced equation = 1 x 32 = 32g
From the balanced equation above,
28g of CO reacted with 4g of H2 to produce 32g of CH3OH.
Next, we shall determine the the limiting reactant. This is illustrated below:
From the balanced equation above,
28g of CO reacted with 4g of H2.
280.2g of CO will react with =
(280.2 x 4)/28 = 40.03g of H2.
From the calculations made above, we can see that only 40.03g out of 50.5g of H2 is required to react completely with 280.2g of CO.
Therefore, CO is the limiting reactant and H2 is the excess reactant.
Finally, we shall determine the mass of methanol, CH3OH produced from the reaction.
In this case, the limiting reactant will be used because it will give the maximum yield of the reaction since all of it is used up in the reaction. The limiting reactant is CO and the mass of methanol, CH3OH produced can be obtained as follow:
From the balanced equation above,
28g of CO reacted to produce 32g of CH3OH.
Therefore, 280.2g of CO will react to produce = (280.2 x 32)/28 = 320.23g of CH3OH.
Therefore, 320.23g of CH3OH were produced from the reaction.
This chemical equation is balanced.
F2+ 2NaBr – 2NaF + Br2
How does the balanced chemical equation show the conservation of matter
in this chemical reaction?
O A. The number of Fatoms in the reactants equals the number of F
atoms in the products.
B. There are more Br atoms in the reactants than in the products.
C. There are fewer Na atoms in the reactants than in the products.
D. The compound Naf is a substance that is different from the
compound NaBr
Answer:
A
Explanation:
A gas sample that has a pressure of 4.23 atm, a volume of 1,870 mL, and a temperature of 293 K is allowed to expand to a volume of 6.01 L with a final temperature of 373 K. What is the final pressure of the gas in atmospheres?
Answer:
1.68 atm.
Explanation:
Given:
P1 = 4.23atm
V1 = 1870 mL
T1 = 293K
P2 = ?
V2 = 6.01 L = 6010 mL
T2 = 373 K
Assuming number of moles and R is constant:
[tex]\frac{P1V1}{T1} = \frac{P2V2}{T2}[/tex]
⇒ P2 = [tex]\frac{P1V1T2}{T1V2}[/tex] = [tex]\frac{2,950,467.3}{1,760,930}[/tex]
= 1.68 atm.
Answer my question please
Answer:
Explanation:F
. ______________ will slow down alcohol absorption. Sleeping well Food in the large intestine Being happy and relaxed Food in the stomach that is high in protein
Answer:
Food in the stomach that is high in protein will dilute absorption of alcohol in your stomach :) therefore always drink with food in your stomach, just drinking alchol without food will have serious consequences on helath.
Explanation:
In order to answer this question, you need to look around your immediate surroundings to find examples of rusting of iron or any other metal. i. What makes iron rust? ii. Why is the rusting of iron a problem? Give any 3 examples from daily life where rusting has been a disadvantage. iii. Suggest any two ways that can help prevent rusting of iron.
Answer:
(i) rusting is caused by the reaction of oxygen and water on the surface of metals(iron).
(ii) rusting of iron makes it weak and dangerous for buildings since their foundation is made of iron, rusting renders cars useless, rusting can cause accidents.
(iii) by galvanizing iron
and by coating it.
Explanation:
hope it helps .
In the equation E = mc2, what does c represent?
Answer:
c is the speed of light
Explanation:
E: energy
m: mass
c2: speed of light squared
OK this is a serious question now XD A) NAME ONE WAY THAT ORGANISMS USE CARBON= ? B) NAME THE ONE PROCESS WHICH DECREASES CO2 IN THE ATMOSPHERE= ? C) NAME THE ONE PROCESS WHICH INCREASES CO2 IN THE ATMOSPHERE= ?
Answer:
A) anaerobic respiration
B) photosynthesis
C) breathing
Diphosphorus pentoxide(P2O5) reacts with water to form phosphoric acid, a major industrial acid. In the laboratory, the oxide is used as a drying agent. a.What is the mass of 4.65 x 10 22molecules of phosphorus pentoxide?
Answer: The mass of [tex]4.65\times 10^{22}[/tex] molecules of phosphorus pentoxide is 20.5 g
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given molecules}}{\text {avogadro's number}}=\frac{4.65\times 10^{22}}{6.023\times 10^{23}}=0.0772moles[/tex]
1 mole of [tex]P_2O_5[/tex] weigh = 283.9 g
Thus 0.0772 moles of [tex]P_2O_5[/tex] weigh = [tex]\frac{283.9}{1}\times 0.0722=20.5g[/tex]
Thus the mass of [tex]4.65\times 10^{22}[/tex] molecules of phosphorus pentoxide is 20.5 g
Atomic radii decrease, moving from left to right across a period. As a result, the electrons become closer to the nucleus. What effect does this movement have on the ionization energy (the amount of energy required to remove an electron from an atom)? The ionization energy stays the same. The ionization energy decreases. The ionization energy increases. Electrons have no effect on ionization energy.
Answer:
The ionisation energy increases.
Explanation:
This is because the force of attraction between the electrons and the positive nucleus will increase
Choose the correct answer:
In a galvanic cell:
a- The reactions taking place are non spontaneous
b- The cathode is negative
c- Electrical energy is converted into chemical energy
d- Chemical energy is converted into electrical energy
Answer:
D.
Explanation:
In a Galvanic cell:
1) Spontaneous reactions take place
2) Chemical Energy is converted to some useful electrical energy
Mention 6 products from coal tar as a result of destructive distillation of coal
Answer:
Coke, coal gas, gas carbon, ammonia liquor, and coal oil
Vincent graduated from college with a degree in horticulture and now owns a local plant nursery. He maintains a blog titled, "How to Live a Happy Life,” and writes that people can lead happier lives by varying the routes they usually take home from work. Which statement best evaluates this claim? This claim is scientific because it is based on Vincent’s personal experience. This claim is scientific because other people have taken his advice and are now happier. This claim may not be accurate because the blog is produced by someone who is not an expert in the field of human psychology. This claim may not be accurate because most people follow the same route home.
Answer:
this claim may not be accurate because the blog is produced by someone who is not an expert in the field of human psychology.
Explanation:
Answer:
this claim may not be accurate because the blog is produced by someone who is not an expert in the field of human psychology.
Explanation: give the branliest to the otherperson :)
What did early scientists assume that the polar caps had in common?
Answer:
They assumed they both had water.
Explanation:
Because they only could look at it through telescopes that were not advanced
hello can you please help me to solve above questions. .
Answer:
i)a. P & R
b. Q& S
ii) R
iii) Atomic no & Atomic radius
2)a. C4H10
b. CH3Cl
Complete the passage to Distinguish between mechanical and electromagnetic waves.
Answer:
waves that move through matter only are called mechanical waves.
waves that move through space only are called electromagnetic waves.
Waves that move through matter only are called
(mechanical) waves.
Waves that move through space are called
(electromagnetic) waves.
Could I get a brainliest please?
A sample of wood with a mass of 30 g has its
temperature changed from 10° to 45° C. In the
process, it releases 90 J of heat. What is its specific
heat?
Answer:
0.086J/g°C
Explanation:
The following data were obtained from the question:
Mass (M) = 30g
Initial temperature (T1) = 10°C
Final temperature (T2) = 45°C
Change in temperature (ΔT) = T2 – T1 = 45°C – 10°C = 35°C
Heat (Q) released = 90J
Specific heat capacity (C) of wood =..?
We can obtain the specific heat capacity of the wood as follow:
Q = MCΔT
90 = 30 x C x 35
Divide both side by 30 x 35
C = 90/(30 x 35)
C = 0.086J/g°C.
Therefore, the specific heat capacity of the wood is 0.086J/g°C.
Zinc will displace copper from a solution of copper sulfate, and magnesium will displace zinc from a solution of zinc sulfate. Why can these displacement reactions be regarded as redox reactions? Write down a series of reactivity for these three metals, putting them in order of increasing reactivity.
Answer:
The displacement reactions are regarded as redox reactions because they involve the formal transfer of electrons from one chemical specie to the other
2) The series of reactivity of the metals in the order of increasing reactivity are;
Copper↓
Zinc↓
MagnesiumExplanation:
1) Redox (oxidation-reduction) reaction is a chemical reaction involving the loss and gain of electrons from one chemical species to another, where the chemical species that undergoes oxidation, loses electrons and is termed the reducing agent, while the other chemical species that undergoes reduction, gains electrons, and is termed the oxidizing agent
2) The redox reaction can being based on the affinity for electrons depends on the positions of the reactants in the electrochemical series as well as the chemical reactivity of the metals with zinc being a stronger reducing agent and more chemically reactive than copper and magnesium being a stronger reducing agent and more chemically reactive than zinc
Least reactive (Cu) < (Zn) < Mg Most reactive
Copper < Zinc < Magnesium.
What is the molecularity of the elementary step A+ B+ C?
O A.
unimolecular
OB.
bimolecular
O C. trimolecular
OD
tetramolecular
Answer:
trimolecular
Explanation: