Answer:
melting and solidification
Answer: MELTING
Explanation:
What coefficient well O2 have after balancing this equation
C4H8 + O2 -> CO2 + H2O
A. 4
B. 8
C. 6
D. 2.5
The coefficient for O₂ after balancing the equation is 4. The correct answer is A. 4.
To balance the equation C₄H₈ + O₂ → 4CO₂ + 4H₂O, we need to ensure that the number of each type of atom is the same on both sides of the equation.
Starting with carbon (C), we have 4 carbon atoms on the left side and only 1 on the right side (in CO₂). To balance carbon, we place a coefficient of 4 in front of CO₂:
C₄H₈ + O₂ → 4CO₂ + H₂O
Next, we move on to hydrogen (H). There are 8 hydrogen atoms on the left side, but only 2 on the right side (in H₂O). To balance hydrogen, we place a coefficient of 4 in front of H₂O:
C₄H₈ + O₂ → 4CO₂ + 4H₂O
Now, let's consider oxygen (O). On the left side, we have O₂, which contains 2 oxygen atoms. On the right side, there are 4 CO₂ molecules, each containing 2 oxygen atoms, and 4 H₂O molecules, each containing 1 oxygen atom. So, the total number of oxygen atoms on the right side is (4 x 2) + (4 x 1) = 8.
To balance oxygen, we need to have 8 oxygen atoms on the left side as well. Therefore, we place a coefficient of 4 in front of O₂:
C₄H₈ + 4O₂ → 4CO₂ + 4H₂O
Therefore, the coefficient for O₂ after balancing the equation is 4.
The correct answer is A. 4.
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Please help!! it’s only question 34 please..
Answer:
Lavoisier disproved the phlogiston theory. He demonstrated that there was an element called oxygen that played a major role in combustion. He also showed that the mass of products in a reaction are equal to the mass of the reactants. The phlogiston theory did not account for the weight changes found in fire. Lavoisier hypothesized that it was probably the fixation and release of air, rather than fire, that caused the observed gains and losses in weight.
Question 107 points)
(02.04 HC
Use examples to explain how the atmosphere interacts with two other of Earth's spheres. Explain the interaction for each using complete
sentences. (7 points)
Answer:
Evaporation from the hydrosphere provides the medium for cloud and rain formation in the atmosphere. The atmosphere brings back rainwater to the hydrosphere. The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The geosphere, in turn, reflects the sun's energy back into the atmosphere.
Explanation:
Balance the equations
Fe + Cl2 =
KMnO4 + HCl =
PhCH3 + KMnO4 + H2SO4 =
calcium hydroxide + carbon dioxide =
which of the following is NOT a substance?
A. sodium
B. water
C. alcohol
D. air
E. table salt
can select more than one if needed
Answer:
c. alcohol
it has no substance
Which evidence is an indication that a chemical reaction has occurred?
formation of a gas
melting of a substance
boiling of a substance
freezing of a substance
Answer: Formation of a gas
Explanation: All of the other options are examples of physical changes not chemical change
Answer:
A. Formation of gas
Explanation:
Took the test and got it correct
Which symbol and unit of measurement are used for electric current?
a. symbol: C; unit: A
b. symbol: 1; unit: C
C. symbol: 1; unit: A
Answer:
C. symbol: 1; unit: A
Explanation:
The symbol and unit of electric current is given as symbol: I; unit: A
Current is one of the fundamental particles. The unit is given in Amperes which is symbolized as A. Current is given as IAccording to ohms law;
I = [tex]\frac{V}{R}[/tex]
I is the current
V is the voltage
R is the resistance.
3. According to Newton's First Law of Motion, what does an object at rest do?
stays at rest
begins to move
cannot be moved
continues to move
Answer:
stays at rest
Explanation:
Answer:
stays at rest
Explanation:
first to answer correctly gets brainleist
Please help meeeee!!
A cylinder containing 5.20 L of NO gas at 1.20 atm and 32 o C is compressed under 6.00 atm pressure to a volume of 2.08 L. What is the final temperature of the gas?
Answer:
337 °C
Explanation:
From the question given above, the following data were obtained:
Initial volume (V1) = 5.20 L
Initial pressure (P1) = 1.20 atm
Initial temperature (T1) = 32 °C
Final pressure (P2) = 6 atm
Final volume (V2) = 2.08 L
Final temperature (T2) =?
Next, we shall convert 32 °C to Kelvin temperature. This can be obtained as follow:
T (K) = T (°C) + 273
Initial temperature (T1) = 32 °C
Initial temperature (T1) = 32 °C + 273
Initial temperature (T1) = 307 K
Next, we shall determine the final temperature of the gas as illustrated below:
Initial volume (V1) = 5.20 L
Initial pressure (P1) = 1.20 atm
Initial temperature (T1) = 305 K
Final pressure (P2) = 6 atm
Final volume (V2) = 2.08 L
Final temperature (T2) =?
P1V1 /T1 = P2V2 /T2
1.2 × 5.2 / 305 = 6 × 2.08 / T2
Cross multiply
1.2 × 5.2 × T2 = 305 × 6 × 2.08
6.24 × T2 = 3806.7
Divide both side by 6.24
T2 = 3806.7 / 6.24
T2 = 610 K
Finally, we shall convert 610 K to celsius temperature. This can be obtained as follow:
T (°C) = T(K) – 273
T(K) = 610 K
T (°C) = 610 – 273
T (°C) = 337 °C
Thus, the final temperature of the gas is 337 °C.
1. What causes frost to form on the outside of a
cold container.
Answer:
condensation
Explanation:
Frost forms when an outside surface cools past the dew point. The dew point is the point where the air gets so cold, the water vapor in the atmosphere turns into liquid. This liquid freezes. If it gets cold enough, little bits of ice, or frost, form
Why is the coefficient of static friction always greater than the coefficient of kinetic friction?
Because in static friction there is more time or enough time for interlocking of irregularities where as there is minimum time for interlocking of irregularities so that kinetic friction is less than that of static friction
Which of the following are reactants in the equation below? Select all that apply.
Zn(s) + CuSO4(aq) = ZnSO4(aq) + Cu(s)
Select all that apply:
A) Zinc
B) Copper
C) Copper (ll) sulfate
D) Zinc sulfate
Answer:
Zinc, copper sulfate
Explanation:
The reactants are the ones on the left side
In the given reaction, it is clearly visible that Zinc and Copper (II) sulfate are the reactants in the equation below. Thus, the correct options are A and C.
What are Reactants?Reactants may be defined as substances or compounds that undergo chemical reactions and have been altered during the course of an incident. Such compounds or substances most of the time are catalyzed by numerous catalysts in order to accomplish the conversion of reactancts substances faster.
The given reaction illustrates an example of a displacement reaction. During this reaction, when zinc is added to copper sulfate solution, zinc displaces copper and forms zinc sulfate solution. It will demonstrate a type of redox reaction.
This happens because on the basis of the reactivity series which determines that zinc is considered to be more reactive than copper.
Therefore, in the given reaction, it is clearly visible that Zinc and Copper (II) sulfate are the reactants in the equation below. Thus, the correct options are A and C.
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what is the chemical formula for silver sulfate
Answer:
Ag2SO4
Explanation:
PLS PLS SOMEONE HELP ME ANSWER THESE QUESTIONS PLEEEAAASSSE!!
(press on the picture so you can see the questions better!)
Answer:
1)conduction
2) convection
3) conduction
4) radiation
5) radiation
6) radiation
7) conduction
8) conduction
9) radiation
10) convection
Explanation:
not 100% sure
Quantum Mechanics relies on probability to say what region of space an electron ismostlikelyto occupy. In your own words, describe how this principle results in the shapes ofthe orbitals.
Answer:
Explanation:
Since electrons are particles that are in constant movement in a wave-like motion, is impossible to know exactly their position and velocity at all times. That's why instead of defining an orbit for them we define an atomic orbital, which is a location in space where the probability of finding an electron is high (therefore, is an electron dense zone). Since this zone has not defined limits (the wave function characterizing the orbital extend from the nucleus to infinity), the further we go from the nucleus the less dense this "cloud" is.
There is about a 90 percent probability of finding the electron within a sphere of radius 100 pm surrounding the nucleus. Thus, we can represent the 1 s orbital by drawing a boundary surface diagram that encloses about 90 percent of the total electron density in an orbital, and the shape of this orbital is a sphere.
The boundary surface diagrams of p orbitals, for example, will have the shape of two lobes on opposite sides of the nucleus, that means that within this two lobes we have a 90 percent probability of finding the electron, and so on.
Different between Public and private enterprises
Explanation:
Private enterprise refers to the enterprise owned, managed and controlled by private persons. Public enterprise refers to the enterprise owned, manage and controlled by government. Private enterprise main motive is earning profit. ... Private enterprise involves funds from individuals.
What type of reaction is illustrated?
What is the formula of copper (iii) carbonate? And what is the name of CuPO4?
Suppose while walking along the beach, you find a green crystal. Which properties could you use to determine whether the crystal is an emerald?
Explanation:
Emerald is defined by its green color. To be an emerald, a specimen must have a distinctly green color that falls in the range from bluish green to green to slightly yellowish green. To be an emerald, the specimen must also have a rich color.
What is different between an ionic bond and a covalent bond?
Answer:
Explanation:
Ionic bond
The electrostatic force between opposite charge ion is known as ionic bond
Covalent bond
The mutual sharing of electron between 2 atoms is known as covelent bond
.) 1. The Lewis valence dot electron structures are used to illustrate the number of valence electrons of atoms of representative elements. Considering this, use the Periodic Table to predict the number of "dots" that should be drawn around Antimony (Sb) to represent its Lewis Dot Structure.
Answer:
put 5 dots
Explanation:
it has 5 valence electrons
Answer:
5
Explanation:
Antimony is in group 15 of the periodic table which means it has 5 valence electrons. Therefore, its Lewis Diagram should contain 5 dots to represent these 5 valence electrons.
Hope this helped!
The energy released in cellular respiration helps an athlete perform. How do you think an athlete might be able to increase cellular respiration?
pls i will give brainliest
eating healthy foods
working out and eating healthy helps
Answer:
higher as
beacause having a healthy diet inproves
your health
Explanation:
What two uses are used for oxygen?
Answer:
I think your lumgs and your heart but I could be tottaly wrong
List two metals that will not react with acid
Answer:
Copper(cu) nd gold(au) will not react with acid at all
Explanation:
How do the energy and the most probable location of an electron in the third shell of an atom compare to the energy and the most probable location of an electron in the first shell of the same atom?
Answer:
In the third shell, an electron has more energy and is farther from the nucleus. (3) In the third shell, an electron has less energy and is closer to the nucleus.
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, atom consists of shells having different energy.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
In the third shell, an electron has more energy and is farther from the nucleus. (3) In the third shell, an electron has less energy and is closer to the nucleus.
Therefore, atom consists of shells having different energy.
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describe how electricity moves through wires
What do butterflies and lobsters have in common?
Answer:
They all wear their skeletons on the outside! This is called an exoskeleton and all creatures that have their structure on the outside are included in the phylum of Arthropods.
Explanation:
The Sup atomic particles are
Answer:
protons, neutrons and electrons
Explanation:
i hope it is
Answer:
proton, electron, neutorn
