Answer:
A
Explanation:
This chemical reaction contains the elements carbon and oxygen.
The chemical symbol for the element carbon is C. The symbol for oxygen is O. Carbon dioxide (CO2) is a compound, not an element.
The given reaction C + O2 → CO2 contains the chemical elements carbon and oxygen. The reactant C represents carbon, while O2 represents oxygen as a diatomic molecule. The product CO2 represents carbon dioxide, which is composed of one carbon atom and two oxygen atoms.
Explanation:In the given reaction C + O2 → CO2, the chemical elements involved are carbon and oxygen. The reactant C represents carbon, while O2 represents oxygen as a diatomic molecule. The product CO2 represents carbon dioxide, which is composed of one carbon atom and two oxygen atoms.
the elements in period 4 on the periodic table are arranged in order to increasung
A difference in electric potential is commonly known as voltage, and is provided by standard batteries. when a battery "dies", this is because the __________ within the battery no longer exists.
Answer:
voltage difference
Explanation:
Remember, a Difference in voltage must exist in order to have current flow.
Organs combine to form Blank Space __________.
A.organ systems
B.tissues
C.organisms
D.cells
Which of the following statements about horizons is true?
a. They are characterized by whether they are solid, liquid, or gas.
b. They are represented by Roman numerals.
c. All soils have completely different horizon patterns.
d. They are defined by their different physical features.
Answer:
d. They are defined by their different physical features.
Explanation:
Horizons is the term used to designate the layers that make up the soil. Each layer receives a letter as identification and has different characteristics. Each shift was formed by the weathering process, which occurs due to the influence of factors, chemical, physical and biological.
As previously mentioned, each layer has different characteristics from each other, which allow a wide interpretation of the soil. These characteristics are physical grades such as color, texture, clay content, viscosity, etc.
For this reason, we can say that the horizon is defined by its different physical characteristics.
Is freshly squeezed orange juice a single element?
How many gallons of 80% antifreeze solution must be mixed with 60 gallons of 20% antifreeze to get a mixture that is 70% antifreeze? Use the six-step method.
...?
Describe the negative effects of wind machines
The number 1,645.6 expressed in scientific notation equals what?
Answer : The number in scientific notation will be, [tex]1.6456\times 10^3[/tex]
Explanation :
Scientific notation : It is defined as the way or representation of expressing the number that are too big or too small that is written in the decimal form. That means always written in the power of 10 form.
For example : 8000 is written as, [tex]8\times 10^3[/tex] and 0.0008 is written as, [tex]8\times 10^{-4}[/tex]
As we are given that the number is, 1645.6
This number is written in scientific notation as, [tex]1.6456\times 10^3[/tex]
Therefore, the number in scientific notation will be, [tex]1.6456\times 10^3[/tex]
What are the abiotic factors a polar bear needs to survive in the tundra?
look at the chemical formula for glucose, how many carbon C, hydrogen H, and oxygen O, atoms are found in a molecule of glucose?
Water is called the “universal solvent.” Which statement best explains this description with respect to ionic compounds?
Answer is: C. Water can dissociate many ionic compounds through ion-dipole interactions.
For example, dissociation of potassium bromide: KBr(aq) → K⁺(aq) + Br⁻(aq).
Some ionic compounds cannot dissociate in water, for example calcium sulfate (CaSO₄), silver chloride (AgCl), lead(II)-carbonate (PbCO₃).
An ion-dipole is electrostatic interaction between a charged ion (cations and anions) and a molecule that has a dipole (in this example water).
Dipole is a separation of positive and negative charges. In water, hydrogen has positive and oxygen has negative charge.
Which of the following compounds is a molecule?
NaCl
MgBr2
H2
AlCl3 Which of the following compounds is a molecule?
NaCl
MgBr2
H2
AlCl3
Answer:
H2
Explanation:
It is a diatomic molecule, meaning it is formed through covalent bonding.
how does Dr.Hoffmann's ultrasound device benefit society? ( modern chemistry textbook page 180).
Answer:
In 1966, Dr. Hoffmann recorded for the first time in medicine embryonic movements and the heartbeat of the fetus using an ultrasound system.
Explanation:
Today, ultrasound is a technique widely used by many medical specialties, in the emergency department, in intensive care or in daily practice.
In 1794, the Italian Spallanzani observed that during the flight of bats they did not collide with anything despite being blind. It is then that he theorizes that they emitted sounds imperceptible to the man he would call ultrasounds, which they capture with their ears after bouncing off objects.
In 1842, Christian Doppler's first article on the effect of his name appears.
In 1912, Richardson suggests the use of ultrasonic echoes to detect submerged objects, creating the first ultrasonic generator five years later by Paul Langevin and Chilowsky.
Since then the applications of this new technology have been unstoppable, especially in medicine.
Final answer:
Dr. Hoffmann's ultrasound device is used for both diagnostic imaging, such as fetal monitoring, at high frequency, and therapeutic treatments, such as tumor destruction, at lower frequency, providing non-invasive, safe, and effective medical care.
Explanation:
Dr. Hoffmann's ultrasound device provides significant benefits to society, particularly in the fields of medicine and healthcare. Ultrasound technology operates on the principle of using high-frequency sound waves to create images or induce therapeutic effects within the human body. For diagnostic purposes, such as observing a fetus in the womb, ultrasound imaging tends to use higher frequencies ranging from 5-20 MHz because higher frequencies produce more detailed images, which are essential for accurate monitoring and diagnostics.
Meanwhile, for therapeutic applications, such as destroying cancerous tumors, lower frequencies of 1-3 MHz can generate sufficient heat to damage and destroy tumor cells without harming surrounding tissues, offering a non-invasive treatment option.
These medical applications of ultrasound are just two examples of how this technology has revolutionized healthcare, making it possible to diagnose and treat patients safely, effectively, and without invasive surgical procedures. Moreover, the development and improvement of ultrasound devices contribute to ongoing research and the discovery of even more applications in various fields beyond medicine.
the bonding of two amino acids to form a larger molecule requires the addition of nitrogen the release of carbon dioxide the release of a water molecule the addition of a water molecule
How is a combustion reaction like the respiration reaction? List many similarities as you can.
Is iced tea with no ice a homogenuous or a heterogenuous mixture? ...?
Iced tea with no ice is a homogeneous mixture. This is because it has a uniform composition and properties throughout, meaning that you can't distinguish between the different parts of the mixture.
Explanation:When considering whether a substance is a homogeneous or heterogeneous mixture, it's important to look at its physical characteristics. Iced tea with no ice is an example of a homogeneous mixture. Despite the misleading name, the absence of ice does not change the nature of the substance. A homogeneous mixture is defined as a mixture that has uniform composition and properties throughout. This means that you can't distinguish between the different parts of the mixture. Since all portions of the tea mixture are the same, it meets this criterion. On the other hand, a heterogeneous mixture has different compositions and properties in different parts of the mixture.
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What is the theoretical yield of carbon dioxide if H3C6H5O7+3NaHCO3-3CO2+Na3C6H5O7
The theoretical yield of carbon dioxide can be calculated using the stoichiometric ratio in the balanced equation for the reaction. It is the amount of product that would be obtained if all reactants were completely converted to product under ideal conditions. The theoretical yield can be calculated by multiplying the amount of the starting reactant by the stoichiometric ratio in the balanced equation.
Explanation:Theoretical yield is the amount of product that would be obtained from a chemical reaction if the reaction proceeded perfectly and all reactants were completely converted to product. In this case, the balanced equation shows that 1 mole of H3C6H5O7 reacts with 3 moles of NaHCO3 to produce 3 moles of CO2. Therefore, the theoretical yield of carbon dioxide would be 3 times the amount of H3C6H5O7 given.
Example: If 2 moles of H3C6H5O7 are given, the theoretical yield of CO2 would be 3 x 2 = 6 moles.
Note that the theoretical yield assumes ideal conditions and perfect conversion, so the actual yield may be less due to factors like incomplete reactions or side reactions.
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Why does air have the following properties mass, volume, density, and pressure?
Which element is probably most like carbon
Describe how electron movement is related to the bonding in methane, ch4.
How do an ionic bond and covalent bond differ?
A) There is no difference. Both an ionic bond and a covlent bond share electrons.
B) A covalent bond is an attraction between oppositely charges ions. An ionic bond is a sharing of electrons between atoms.
C) There is no difference. Both an ionic bond and a covalent bond are attractions between oppositely charged ions.
D) An ionic bond is an attraction between oppositely charged ions. A covalent bond is a sharing of electrons between atoms.
Answer:
The answer is of course, D
Explanation:
For example, since potassium (K) is a metal and chlorine (Cl) is a nonmetal, if these two elements combine, they will form an ionic bond. If carbon (C), a nonmetal, and oxygen (O), a nonmetal, combine, they will form a covalent bond.
An atom with 20 protons and 20 electrons 20 neutrons is arranged according to?
The emission spectrum of hydrogen shows discrete, bright, colored lines. Which characteristic of the Bohr model is best supported by this observation?
a.Energy is released when an electron moves to a higher energy level.
b.Smaller atoms have fewer spectral lines than larger atoms.
c.The energy of an electron increases with distance from the nucleus.
d.Electrons cannot exist in locations other than in specific orbits.
Answer is: d.Electrons cannot exist in locations other than in specific orbits.
According to the Bohr model of the atom:
1. Energy levels of electrons are discrete (certain discrete values of energy)., that is why hydrogen shows discrete, bright, colored lines.
2. Electrons orbit the nucleus in orbits that have a set size and energy.
3. Electrons can jump from one energy level to another, absorbing or emitting electromagnetic radiation with a frequency ν (energy difference of the levels).
Binary ionic compounds are named in what pattern?
A. The metal followed by nonmetal.
B. The nonmetal followed by the metal.
C. The metal followed by the polyatomic ion.
D. The anion followed by the cation.
If this atom has a balanced charge, how many protons would you expect to find in this atom?
0
2
4
6
Answer:
If you are in k12 then I think the answer you are looking for is 6
Iron (Fe) reacts with copper sulfate (CuSO4) to form iron (II) sulfate. In this reaction, Cu2+ gains electrons to form Cu. Which statement is true about this reaction?
Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
A.) Cu undergoes decomposition.
B.) Cu undergoes oxidation.
C.) Cu undergoes reduction.
D.) Cu undergoes combustion.
C. Cu undergoes reduction.
Answer: C.) Cu undergoes reduction.
Explanation:
[tex]Fe(s)+CuSO_4(aq)\rightarrow FeSO_4(aq)+Cu(s)[/tex]
I) Oxidation reaction : involves loss of electrons and there is an increase in oxidation state number.
[tex]Fe\rightarrow Fe^{2+}+2e^-[/tex]
Fe metal has undergone oxidation, as its oxidation state is changing from 0 to +2 in [tex]FeSO_4[/tex].
ii) Reduction reaction : involves gain of electrons and there is a decrease in oxidation state number.
[tex]Cu^{2+}+2e^-\rightarrow Cu[/tex]
Copper(II) ion has undergone reduction, as its oxidation state is changing from 2+ to 0. Copper ions are getting converted into copper metal.
HELP!!!
Which of these organs is not found in the digestive system?
A.stomach
B.large intestine
C.small intestine
D.urethra
Calculate the molar mass for h2so4
To calculate the molar mass of sulfuric acid (H2SO4), sum the molar masses of hydrogen, sulfur, and oxygen based on their respective quantities, yielding a molar mass of 98.09 g/mol.
Explanation:To calculate the molar mass of sulfuric acid (H2SO4), you need to sum the molar masses of all the atoms in a molecule of H2SO4. Each atom's molar mass is found on the periodic table: hydrogen (H) has a molar mass of approximately 1.01 g/mol, sulfur (S) has a molar mass of approximately 32.07 g/mol, and oxygen (O) has a molar mass of approximately 16.00 g/mol.
Using these values, you can perform the following calculation:
For hydrogen: 2 atoms × 1.01 g/mol = 2.02 g/molFor sulfur: 1 atom × 32.07 g/mol = 32.07 g/molFor oxygen: 4 atoms × 16.00 g/mol = 64.00 g/molAdd these values together to get the total molar mass of H2SO4:
Molar mass = 2.02 g/mol + 32.07 g/mol + 64.00 g/mol = 98.09 g/mol
This is the molar mass for sulfuric acid, which is essential for various calculations in chemistry, such as determining the number of moles in a given sample or calculating the concentration of solutions.
Enter the molecular formula for butane, C4H10.
Express your answer as a chemical formula.
Determine the number of neutrons in an atom U-233.
Answer : The number of neutrons in an atom U-233 is, 141 neutrons.
Explanation :
The given atom is, U-233
The atomic mass number of U = 233
The atomic number of U = 92 (from the periodic table)
Now we have to determine the number of neutrons in U-233.
Number of neutrons = Atomic mass number - Atomic number
Number of neutrons = 233 - 92 = 141
Therefore, the number of neutrons in an atom U-233 is, 141 neutrons