How many protons does iron oxide?
Answers
Answer:
26 protons..........
Related Questions
A gas has a volume of 25.0 mL at 2.50 atm. What is the volume at 457 mmHg if the temperature remains constant?
Answers
Answer:
≈ 0.104 liters
Explanation:
We can use Boyle's Law: \(P_{1}V_{1} = P_{2}V_{2}\)
P₁ = 2.50 atm
V₁ = 25.0 mL
P₂ = 457 mmHg
V₂ = ?
Because pressure should be in atm we will convert 457 mmHg to units in atm:
1 atm = 760mmHg so we can divide 457 by 760 and we get ≈ 0.601atm
Next we can plug in the units to the equation for Boyle's Law:
(2.50)(25.0) = (0.601)(V₂)
Solve for V₂
V₂ will give you ≈ 104mL or 0.104L
Either is correct depending on which unit they are asking you to use
16
A piece of wire is attached
from the top of a 45 foot utility
pole to a stake in the ground. If
the angle of elevation from the
stake to the top of the pole is 39º.
find the length of the wire. Round
to the nearest tenth.
Wilson Type 2013
HELP. Pls
Answers
The length of the wire is approximately 53.9 feet.
To find the length of the wire, we can use the trigonometric relationship of the angle of elevation.
Given:
Height of the pole (vertical side) = 45 feet
Angle of elevation (opposite side) = 39º
We can use the trigonometric function tangent (tan) to relate the height of the pole and the length of the wire.
Tangent of the angle of elevation (tanθ) = Height of the pole / Length of the wire
tan(39º) = 45 / Length of the wire
Rearranging the equation to solve for the length of the wire:
Length of the wire = Height of the pole / tan(39º)
Substituting the values:
Length of the wire = 45 / tan(39º)
Calculating this using a calculator or trigonometric table, we find:
Length of the wire ≈ 53.9 feet
Therefore, the length of the wire is approximately 53.9 feet when rounded to the nearest tenth.
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Using the periodic table, identify the name and symbol of the three neutral atoms given their atomic numbers and masses. The neutral atom with an atomic number of 1 and a mass number of 1. bol. name: Hydrogen atomic symbol: H The neutral atom with an atomic number of 11 and a mass number of 23. name: (Sodium name: Sodium atomic symbol: | 22 Na dionie sympat yang The neutral atom with an atomic number of 7 and a mass number of 14. name: Nitrogen Nitrogen atomic symbol: 0 atomic symbol: N | N º
Answers
The neutral atom with an atomic number of 1 and a mass number of 1 is Hydrogen (H).
The neutral atom with an atomic number of 11 and a mass number of 23 is Sodium (Na).
The neutral atom with an atomic number of 7 and a mass number of 14 is Nitrogen (N).
The atomic number of an element corresponds to the number of protons in its nucleus, which determines its identity. The mass number represents the total number of protons and neutrons in an atom.
For the first atom, with an atomic number of 1 and a mass number of 1, there is only one proton and no neutrons, which corresponds to Hydrogen (H).
The second atom, with an atomic number of 11 and a mass number of 23, has 11 protons and 12 neutrons. This corresponds to the element Sodium (Na).
The third atom, with an atomic number of 7 and a mass number of 14, has 7 protons and 7 neutrons, which corresponds to Nitrogen (N).
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How many moles of O2 can be produced by letting 12 mol of KClO3 react in the following equation?
2KClO3 → 2KCl + 3O2
Answers
To determine how many moles of O2 can be produced by letting 12 mol of KClO3 react in the given equation, we first need to use stoichiometry. Stoichiometry is the study of the quantitative relationships between reactants and products in a chemical reaction. The coefficients in the balanced chemical equation tell us the mole ratios of the reactants and products.
From the balanced equation, we can see that for every 2 moles of KClO3 that react, 3 moles of O2 are produced. This means that the mole ratio of KClO3 to O2 is 2:3. To find out how many moles of O2 can be produced from 12 mol of KClO3, we can set up a proportion:
2 mol KClO3 / 3 mol O2 = 12 mol KClO3 / x mol O2
Solving for x, we get:
x = (3 mol O2 * 12 mol KClO3) / 2 mol KClO3
x = 18 mol O2
Therefore, 12 mol of KClO3 can produce 18 mol of O2 in the given equation.
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HELP THIS IS SCIENCE: what is difference between the pupil and the iris?
Answers
Answer:
Pupil is the blackness in the middle, which is technically a "hole" in your eye which light goes through. The iris is the part that has color.
Explanation:
When someone asks you "what color are your eyes," they really mean "what color are your irises"
Balancing Chemical Reactions Worksheet A glow stick is a popular toy and safety device. To use a glow stick, you bend a small flexible plastic tube to break a small glass capsule inside, at which point the stick begins to glow. How do you think this works
Answers
Answer:
Concept of chemi-fluorescence
Explanation:
A glow stick usually consists of two chemicals in a larger plastic tube: , a base catalyst (mostly sodium salicylate), and a suitable dye (sensitizer, or fluorophor). This creates an exergonic reaction when mixed together.
When a glow stick is bent, the flurophor which is a chemical that easily re-emits light upon excitation in smaller capsules is released into the other substance, there by causing it to emit radiation/light in the uv-visible region. The brightness and longevity of the glow stick is determined by varying the concentration of these chemicals.
I hope this explanation clarifies things.
why would an electric vehicle be allowed to travel in the high occupancy vehicles lands with only one driver ?
Answers
Answer:
because it could self drive
Explanation:
idrk but thats my answer
Propane is a gas used for cooking and heating. How many atoms are in 2.12 mol of propane (C₂H₂) Hint: 1 molecule C,H, 11 atoms (3 C and 8 H)
Answers
Answer:
Explanation:
First, let's determine the formula for propane. Propane has 3 carbon atoms and 8 hydrogen atoms.
CH₃CH₂CH₃
Second, use the number of moles of propane given in the problem (2.12 moles) and the formula for propane.
2.12 mol CH₃CH₂CH₃
Third, take 2.12 times the number of carbon atoms and the number of hydrogen atoms in propane.
There are 3 carbon atoms and 8 hydrogen atoms in propane.
2.12 x 3 carbon atoms = 6.36 carbon atoms
2.12 x 8 hydrogen atoms = 16.96 hydrogen atoms
consider the vaporization of liquid water to steam at a pressure of 1 atm. (a) is this process endothermic or exothermic? (b) in what temperature range is it a spontaneous process? (c) in what temperature range is it a nonspontaneous process? (d) at what temperature are the two phases in equilibrium?
Answers
The vaporization of liquid water to steam at a pressure of 1 atm is given. then a) endothermic; b) above 100 °C; c) below 100 °C ; d)100 °C.
What is vaporization?Phase transition from the liquid phase to vapor is called Vaporization. Types of vaporization are as : evaporation and boiling, in which evaporation is a surface phenomenon and boiling is a bulk phenomenon.
a)The vaporization of water requires addition of the heat of vaporization for the given mass of water and also the heat required to raise the water to the boiling point.
b)The boiling of water is a spontaneous process above the boiling point for water that is 100 °C.
c)It is a non-spontaneous process below the boiling point of water that we know is 100 °C.
d) The two phases are in equilibrium at 100 °C.
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(T/F) the most abundant cation in intracellular fluid is sodium.
Answers
False , The most abundant cation in intracellular fluid is potassium (K+), not sodium (Na+). Potassium ions are found in higher concentrations inside cells, contributing to the positive charge within the intracellular environment.
Sodium ions, on the other hand, are more abundant in extracellular fluid. The concentration gradient of sodium and potassium across the cell membrane plays a crucial role in various cellular processes, including the generation of action potentials and the maintenance of cell volume and osmotic balance.
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Gregor Mendel studied the traits of pea plants. Because of his contributions, he is known as the Father of?
Answers
Answer:
A monk, Mendel discovered the basic principles of heredity through experiments in his monastery's garden. His experiments showed that the inheritance of certain traits in pea plants follows particular patterns, subsequently becoming the foundation of modern genetics and leading to the study of heredity.
Explanation:
Answer:
Gregor Mendel (July 20, 1822 - January 6, 1884), is known as the Father of Genetics, is most well-known for his work with breeding and cultivating pea plants, using them to gather data about dominant and recessive genes.
Explanation:
You asked, I answered.
Hope this helped! :)
how many hydrogen(H) atoms are on the reactants side
A.2
B.6
C.12
D.6
Answers
Nitrogen has a lower ionization energy value than ___ when moving from beryllium to neon.
1. Carbon
2. Beryllium
3. Boron
4. Fluorine
Answers
Hope this helps!
In the reaction A + B C, doubling the concentration of A doubles the reaction rate and doubling the concentration of B doubles the reaction rate. Which statement best describes this reaction? A. It is a second-order reaction in A and a second-order reaction in B. B. It is a first-order reaction in A and a second-order reaction in B. C. It is a first-order reaction in A and a first-order reaction in B. D. It is a second-order reaction in A and a first-order reaction in B. E. It is a zero-order reaction with respect to both reactants.
Answers
Answer:
B. It is a zero-order reaction with respect to both reactants
Explanation:
In the reaction A + B C, doubling the concentration of A doubles the reaction rate, and doubling the concentration of B doubles the reaction rate. Which statement best describes this reaction?
Which of these is a benefit of water's unique freezing properties? a) Water freezes in the cells of living bodies, protecting them from external viruses. b) Water freezes in the cracks within rocks, preventing erosion of mountains. c) Water freezes in living bodies, minimizing their dependence on external sources of water. d)Water freezes at the bottom of the ocean, cooling volcanic eruptions. e)Water freezes on the surface of lakes, allowing marine life underneath to survive during winter.
Answers
The benefit of water's unique freezing properties among the options provided is option e) Water freezes on the surface of lakes, allowing marine life underneath to survive during winter.
When water freezes on the surface of lakes, it forms a layer of ice that acts as an insulating barrier. This layer of ice prevents the lake from freezing solid and allows marine life underneath, such as fish and plants, to survive during winter. The ice acts as a protective shield, providing a stable environment and helping to maintain the temperature and oxygen levels necessary for the survival of aquatic organisms.
The other options listed do not accurately describe the benefits of water's unique freezing properties. Water freezing in the cells of living bodies (option a) can actually damage and disrupt cellular structures. Water freezing in the cracks within rocks (option b) can contribute to erosion over time, as freezing and expansion of water in cracks can lead to the weakening and breaking of rocks. Water freezing in living bodies (option c) is generally not desirable, as it can cause harm and damage to cells and tissues. Lastly, water freezing at the bottom of the ocean (option d) does not have a direct impact on cooling volcanic eruptions, as volcanic activity is driven by geological processes unrelated to water freezing.
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What happens to the pH of the solution as you add more substance to it?
Answers
Answer:
If it's a buffer solution, the pH remains unchanged.
If it's a normal solution, and an acidic substance is added to it, the pH lowers.
If a basic substance is added to it, the pH increases.
Which statement best explains the type of bond that will form between two elements from group 6A in the model?
A. The two elements will form a covalent bond because both elements will share a single electron in order to have full outer shells
B. The two elements will form a covalent bond because both elements will share a pair of electrons in order to have full outer shells.
C. The two elements will form an ionic bond because one of the elements will donate one electron to the other element in order to have full outer shells.
D. The two elements will form an ionic bind because one of the elements will donate two electrons to the other elements in order to have full outer shells.
*Will give brainliest*
Answers
Answer:
D is the answer
Like my answer
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option D.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
The two elements will form an ionic bind because one of the elements will donate two electrons to the other elements in order to have full outer shells.
Therefore, the correct option is option D.
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Calculate the volume in L of 11.6 moles of Neon at 120 K when it has a pressure of 25.9 atm
Answers
Answer:
The volume of the gas is approximately 4.41 liters
Explanation:
The details of the data of the Neon gas are;
The number of moles of Neon gas present, n = 11.6 moles
The temperature of the sample of Neon gas, T = 120 K
The pressure of the sample of the Neon gas, P = 25.6 atm
By the ideal gas equation, we have;
P·V = n·R·T
Where;
R = The universal gal constant = 0.08205 L·atm·mol⁻¹·K⁻¹
Therefore, we get;
V = n·R·T/P
Which gives;
V = 11.6 moles × 0.08205 L·atm·mol⁻¹·K⁻¹ × 120 K/(25.9 atm) ≈ 4.4097915 L
The volume of the gas, V ≈ 4.41 L.
Help me on both of those questions please
Answers
Answer:
Hey mate.....
This is your answer....
Explanation:
1. Evaporation
2. Liquid to solid
hope it helps you,
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To test for accommodation, the person focuses on a distant object and then shifts the gaze to a near object about 6 inches away. At near distance, you would expect the pupils to constrict and the axes of the eyes to do what
Answers
When testing for accommodation, you would expect the pupils to constrict and the axes of the eyes to converge when focusing on a near object.
To test for accommodation, the person focuses on a distant object and then shifts the gaze to a near object about 6 inches away. At near distance, you would expect the pupils to constrict and the axes of the eyes to converge or move closer together.
This is because the process of accommodation involves the ciliary muscle contracting and causing the lens to thicken, which allows the eyes to focus on near objects. As the eyes focus on the near object, the muscles that control eye movements also adjust to make the eyes converge, or turn slightly inward, to maintain binocular vision and prevent double vision.
So, in summary, when testing for accommodation, you would expect the pupils to constrict and the axes of the eyes to converge when focusing on a near object.
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What is the mole fraction of oxygen gas in air (see table 5. 3 in the textbook)? express your answer using two significant figures?
Answers
The mole fraction of oxygen gas in air from table 5.3 of the textbook is 0.2095.
In the textbook table 5.3, the mole fraction of oxygen gas in air is 0.2095. The mole fraction refers to the number of moles of a substance in a given solution divided by the total number of moles of all components present in the solution. For air, the other components include nitrogen, carbon dioxide, and other trace gases.
In conclusion, the mole fraction of oxygen gas in air from table 5.3 of the textbook is 0.2095.
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A certain mass of nitrogen gas occupies a volume of 5.18 L at a pressure of 2.94 atm. At what pressure will the volume of this sample be 7.56 L
Answers
At a pressure of approximately 2.01 atm, the volume of the nitrogen gas sample will be 7.56 L.
How to calculate the pressure occupied by a given volume of gas?To find the pressure at which the volume of the nitrogen gas sample will be 7.56 L, we can use the Boyle's Law formula, which relates the initial and final pressures and volumes of a gas sample at constant temperature. The formula is:
P1 × V1 = P2 × V2
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume. In this case, we are given:
P1 = 2.94 atm
V1 = 5.18 L
V2 = 7.56 L
We need to find P2. To do this, we can rearrange the formula to solve for P2:
P2 = (P1 × V1) / V2
Now, we can plug in the given values:
P2 = (2.94 atm × 5.18 L) / 7.56 L
P2 ≈ 2.01 atm
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4. What coefficients do you need to balance the following equation?
CH4 + O2 + CO2 + H2O
O 1, 2, 1, 2
O 2, 1, 1, 1
O 1, 1, 1, 1
O 2, 1, 2, 2
Answers
Answer:
option first is the right answer
A local plant nursery uses large sprinklers to water the plants twice a day. The water contains phosphorus, which is a fertilizer that helps plants grow. Some of the water becomes runoff and ends up in nearby streams and lakes. This is an example of which type of short-term human-induced environmental change? eutrophication
Answers
Answer:
It’s eutrophication
Explanation:
There is no way it can be DEFORESTATION or NON SUSTAINABLE SPECIES
Non sustainable harvesting has something to do with animals and eutrophication means adding excessive nutrients
Answer:A.
Explanation: I took the test, sorry if this is incorrect
how fast will benzene solidify
Answers
Answer:
Very fast
Explanation:
An ice cube is placed onto a hot pan that is sitting on the counter top as shown below. please i need help
Answers
Answer:
its gonna melt an turn to water
Explanation:
im not d u m b
Newton's Third Law of Motion states that objects exert equal forces on each other in opposite directions.
Which of the following examples best describe Newton's Third Law of Motion?
O
A. waiter pulls off the tablecloth but the dishes remain
O
B. a ball rolling down and incline plane
C. a baseball bat resting against a wall
D. truck crashes into a car
Answers
Answer:
Truck crashes into a car
PLEASE answer this Quick!! I have to submit this in a HOUR!!!!! -
Describe the relationship between the state of matter of water (gas, liquid, solid) and the motion of the water molecules
I Will give 30 POINTS!!
Answers
Answer:
Solid turns to liquid and liquid to gas
Explanation:
ice cube to water, water to carbon
Which series of words describes lengths of geologic time from shortest to longest?
era
period
eon
era
Answers
Answer:
eon,era, period
Explanation:
Answer:
period<era<eon
Explanation:
I took the test, sadly got a 70%.
Which three phenomena occur during a double-slit experiment and support the wave model of light?
A. The light passes through the slit
B. Bright areas appear on the screen
C. Light bends around the edges of the slit
D. Dark areas appear on the screen
Answers
Answer:BC And D
Explanation:just did the quiz
The three phenomena occur during a double-slit experiment and support the wave model of light is bright areas appear on the screen, light bends around the edges of the slit, dark areas appear on the screen. Therefore, option B, C and D are correct.
What is double slit experiment ?The double-slit experiment, which was conducted to study the characteristics of light in the eighteenth century, has subsequently been found to illustrate the duality of photons as well as the ideas of superposition and quantum interference.
It implies that things we refer to as "particles," like electrons, in some ways mix the traits of both particles and waves. That is quantum physics' renowned wave-particle duality.
The three phenomena occur during a double-slit experiment and support the wave model of light is bright areas appear on the screen, light bends around the edges of the slit, dark areas appear on the screen.
Thus, option B, C and D are correct.
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