Answers
Answer:
2Al + 3FeO->Al2O3+3Fe
Explanation:
plug in those numbers to balence the equation and yes Al2O3 does not have a number in front
Answer:
2Al +3FeO = 1 Al2O3 + 3Fe
Explanation:
you need 2 al on the left to get al2 on the right, and you need 3 o on the left to get o3 on the right. there's still 3 fe left over, so that's what you put there.
Related Questions
write down the important difference between physical change and chemical change
Answers
Answer:
In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.
Explanation:
if this helped you should mark this the brainliest answer also you should join a meeting if you like it would be fun
Answer:
physical change is reversible but chemical change is irreveesable4
The process of releasing silver iodide into the atmosphere to stimulate rainfall is called:?
Answers
How to differ if a particle is a metal or a non metal
Answers
The properties of metals and nonmetals are different, and these differences can be used to differentiate between them. Here are some characteristics that can be used to identify whether a particle is a metal or a nonmetal:
Physical appearance: Generally, metals are shiny, lustrous, and have a metallic luster. Nonmetals, on the other hand, are typically dull, lack luster, and are not shiny.
Conductivity: Metals are good conductors of heat and electricity, while nonmetals are poor conductors.
Malleability and ductility: Metals are generally malleable and ductile, meaning they can be easily shaped or drawn into wires. Nonmetals, however, are brittle and not malleable or ductile.
Chemical properties: Metals tend to form positive ions, while nonmetals tend to form negative ions.
By examining these properties, it is possible to differentiate between metals and nonmetals.
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Two main types of elements with different characteristics are metals and nonmetals. By looking at a particle's physical and chemical characteristics, one may tell if it is a metal or nonmetal.
The following characteristics of metals and nonmetals can be used to distinguish them: Physical Characteristics Nonmetals are drab and lack a metallic shine, whereas metals are often brilliant and have one. Metals can usually be easily formed into various shapes because they are malleable and ductile. Nonmetals have a tendency to break readily and are fragile. Nonmetals are weak conductors of heat and electricity compared to metals. Except for mercury, metals are typically solid at room temperature. At room temperature, nonmetals might be solid, liquid, or gas.
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What does the shape of the moon we see depend on?
The position of the moon during its orbit around Earth
The position of the moon during its orbit around Jupiter
The position of the moon during its orbit around Mars
The position of the moon during its orbit around Saturn
Answers
Answer:
The position of the moon during its orbit around Earth
Answer:
the angle you look at it from
When molten magma cools ________ under the surface, it forms _________ igneous rocks.
A. rapidly, extrusive
B. slowly, extrusive
C. rapidly, intrusive
D. slowly, intrusive
Answers
A school bus travels 40 kilometers in 1 hour. What is the appropriate unit for the average speed of the school bus?
Answers
Answer:
The average speed is = 11.1m/s
Explanation:
Recall that average speed is defined as the total distance traveled with respect to the total number of time, therefore we say that the total distance traveled is 40Km according to your question, remember, the unit of speed is metre per second, so you change 40km by multiplying it with 1000, recall that, 1000m = 1km, so 40km×1000m = 40,000m, also 1h= 60×60, =3600s
Remember the formula for average speed is = Total distance traveled÷ total time taken
Thus; 40000m/3600s
Then we had, 11.1m/s...
You can ask questions
For a certain polyatomic ideal gas the value of its ideal gas constant is 0.123 kJ/(kg.K). Determine a) its molecular weight (W);
Answers
The molecular weight (W) of the polyatomic ideal gas is equal to the temperature (T) divided by the volume (V) calculated as 0.123 kJ/(K).
The molecular weight (W) of the polyatomic ideal gas can be determined using the ideal gas equation:
PV = mRT
where:
P = pressure of the gas (in this case, it is not given)
V = volume of the gas (in this case, it is not given)
m = mass of the gas (in kilograms)
R = ideal gas constant (0.123 kJ/(kg.K))
T = temperature of the gas (in Kelvin)
To calculate the molecular weight (W), we need to find the value of m. Since the pressure and volume are not provided, we can rearrange the ideal gas equation as follows:
m = PV / (RT)
Now, let's assume a hypothetical situation where we have 1 kg of the polyatomic ideal gas. In this case, the mass (m) would be equal to 1 kg.
Substituting the values into the equation:
m = (1 kg) * V / (0.123 kJ/(kg.K) * T)
Here, we can see that the units of kilograms (kg) cancel out, leaving us with:
1 = V / (0.123 kJ/(K))
To isolate V, we multiply both sides of the equation by 0.123 kJ/(K):
0.123 kJ/(K) = V
Now, we have the volume (V) in cubic meters. The molecular weight (W) can be calculated using Avogadro's law, which states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules.
To calculate the molecular weight (W), we need to determine the number of moles (n) of the gas. The number of moles can be found using the equation:
n = PV / (RT)
However, since the pressure and volume are not provided, we cannot calculate the number of moles directly. Instead, we can make use of the molar mass (M) of the gas, which is the mass of 1 mole of the gas.
The molar mass (M) is related to the molecular weight (W) as follows:
M = W / 1000
Since we assumed a mass of 1 kg earlier, the molar mass (M) can be calculated as:
M = (1 kg) / n
Substituting the value of n from the equation above:
M = (1 kg) / (PV / (RT))
M = RT / PV
Now, substituting the value of R (0.123 kJ/(kg.K)) and rearranging the equation:
M = (0.123 kJ/(kg.K)) * T / (0.123 kJ/(K) * V)
The units of kJ cancel out, leaving us with:
M = T / V
Using the value of V we calculated earlier (0.123 kJ/(K)), we can determine the molecular weight (W) of the polyatomic ideal gas.
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Help . . .
Where is the magnetic field strongest?
A. closest to the wire
B. Farthest from the wire
Answers
Answer:
In general, the magnetic field is strongest close to the wire and weaker farther away. In fact, the magnetic field weakens as 1/r1/r where rr is the distance from the wire. This can change a bit depending on the length and shape of the wire. Far enough away, the magnetic field decays as 1/r21/r2 .
Answer:
Closest to the wire
Explanation:
In general, the magnetic field is strongest close to the wire and weaker farther away. In fact, the magnetic field weakens as where is the distance from the wire. This can change a bit depending on the length and shape of the wire.
Identify the ion that is responsible for the red color of rubies.
Cr^4+
Cr^5+
Cr^7+
Cr^6+
Cr^3+
Answers
The ion responsible for the red color of rubies is: Cr³+ (chromium(III) ion).
Rubies are a variety of the mineral corundum (aluminum oxide, Al2O3). The presence of chromium ions as impurities in the crystal lattice causes the red coloration. When light interacts with the Cr^3+ ions, some wavelengths are absorbed while others are transmitted or reflected.
The transmitted or reflected light appears red, giving rubies their characteristic color. Other impurities in the crystal lattice can result in different colors of corundum, such as sapphires. It is important to note that the other chromium ions, Cr⁴+, Cr⁵+, Cr⁶+, and Cr⁷+, are not responsible for the red coloration in rubies.
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A third baseman throws a ball from third to first. The ball travels a 20 m/s of 2 seconds. What is the distance between third base and first base. A 2 meters B20 meters C22 meters D40 meters
Answers
Answer:
the answer would be D
Explanation:
Select the true statement pertaining to this diagram
At 100 KPa of pressure water exists as a liquid at 300°C
As the pressure increases the boiling point increases
As the temperature and the pressure remains constant the water is more likely to remain a solid
Water can not exist as liquid above 100°C.
Answers
Answer:
As the pressure increases the boiling point increases.
The Lewis structure of carbon dioxide is given below. The hybridization of the carbon atom in carb dioxide is __
A) sp2d B) sp2d2 C) sp3 D) sp E) sp2
Answers
The hybridization of the carbon atom in the Carbon-dioxide is d) sp
Hybridization is the phenomenon where two atomic orbitals combine to obtain a new degenerate hybrid orbital with the same energy level. Hybridization makes bond formation more stable than unhybridized orbitals. Molecular hybridization can predict the shape of a molecule. In sp-hybridization, s-orbitals and p-orbitals hybridize to form two sp-orbitals, each composed of 50% s-characters and 50% p-characters. This type of hybridization is necessary when an atom is surrounded by two electron groups. If a carbon atom is bound to two other atoms by two double bonds or one single and one triple bond, it can be in an sp hybridization state. When hybridized in the sp state, the molecule has a linear array of atoms with bond angles of 180°.
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1. Kaleigh notices when she goes to the beach that sometimes the water rises as high as the pier. At other times of the day, the water barely covers the pillars under the pier. These differences in water level are primarily due to the gravitational influence of which of the following?
a. The Earth’s revolution b. The Moon c. asteroids d. comets
Answers
Tides are due to the gravitational forces of the Moon and the Sun. The tide is high when the moon or the sun or both are on the side of the sea and vice versa.
The effect of tides due to the moon is much greater than that of the sun, because the moon is much closer to the earth.
Which of the following is an agent of weathering on Earth?
wind
plants
ice
all of the above
Answers
write both a ablacnced molecular eation and a net ionic equation for each precipitation reaction observed in this experiment
Answers
Balanced molecular equation and a net ionic equation for precipitation reaction with example is as follows:
Molecular equation
Hg₂(NO₃)₂ (aq) + KI(aq) ⇒Hg₂I₂(s) + 2KNO₃(aq)
Total Ionic equation
Hg²⁺(aq) + 2NO³⁻(aq) + 2K⁺aq) ⇒Hg₂I₂(s) + 2K⁺(aq) + NO³⁻ (aq)
Net Ionic equation
Hg²⁺(aq) + 2I⁻(aq) ⇒ Hg₂I₂(s)
The only reference to a chemical equation is a balanced equation. Any ionic substances or acids are represented in a molecular equation as neutral compounds using their chemical formulae. The state of each substance is listed in parenthesis after the formula. In contrast to a net ionic equation, which only shows the chemical species participating in a reaction, a complete ionic equation also includes the spectator ions.
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Compare diamonds and graphite - Structure, bonding, properties, use
Answers
Answer:
Carbon atoms each form four strong bonds. The bonds are covalent (atoms share electrons). This gives graphite its characteristic properties such as high melting and boiling points, good electrical conductivity, and softness. Use as pencil 'lead', as a lubricant in oil, furnace linings, electrodes, neutron moderators in nuclear power stations.
Diamond atoms each form three strong covalent bonds in the same layer and one weak bond to an atom in another layer. Diamonds have a high level of hardness, thermal conductivity, and optical dispersion. It is used for jewellery, oil-well drills, abrasives and cutting tools.
Explanation:
Structure of Graphite and Diamond (attached below):
A radioactive isotope decayed to 17/32 of its original mass after 60 minutes. Find the half-life of this radioisotope.
Answers
The half life of the isotope is 60 minutes.
What is half life?The term half life refers to the time taken for an isotope to decay to half of its original amount. In order to find the half life of the isotope, we can use the formula;
N/No =(1/2)^t/t1/2
Where;
N = mass of the isotope at time t
t = time taken
t1/2 = half life of the isotope
No = mass of the isotope originally present
Hence;
17/32 = (1/2)^60/t1/2
(0.5)^1 = (0.5)^60/t1/2
1 = 60/t1/2
t1/2 = 60 minutes
The half life of the isotope is 60 minutes.
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The action of the sodium-potassium pump is an example of passive transport.
a. True
b. False
Answers
True
The sodium-potassium pump carries out a form of active transport—that is, its pumping of ions against their gradients requires the addition of energy from an outside source.
a sample of barium chloride weighing 20.5g was dissolved in enough water to make a solution with a concentration of 0.175m. what is the volume of the solution (in ml)?
Answers
The volume of the solution is 562.9 mL.
To find the volume of the solution, we need to use the formula:
concentration (molarity) = moles/volume (in liters)
We are given the concentration of the solution, which is 0.175 M. We can use this to find the number of moles of barium chloride in the solution:
0.175 M = moles / volume (in liters)
moles = concentration x volume (in liters)
We don't know the volume of the solution yet, but we can find the number of moles of barium chloride by rearranging the formula:
moles = concentration x volume (in liters)
volume (in liters) = moles / concentration
To find the moles of barium chloride, we first need to convert the mass given to moles using the molar mass of barium chloride. The molar mass of BaCl₂ is:
Ba: 137.33 g/mol
Cl₂: 2 x 35.45 g/mol =70.90 g/mol
Total: 137.33 + 70.90 = 208.23 g/mol
So, the number of moles of barium chloride is:
moles = 20.5 g / 208.23 g/mol
moles = 0.0986 mol
Now we can use the formula above to find the volume of the solution:
volume (in liters) = moles / concentration
volume (in liters) = 0.0986 mol / 0.175 M
volume (in liters) = 0.5629 L
Finally, we need to convert the volume to milliliters:
volume (in mL) = 0.5629 L x 1000 mL/L
volume (in mL) = 562.9 mL
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If the price of peaches increases, what can be expected?
More peaches will be sold.
Fewer peaches will be sold.
The number of peaches sold will be unaffected.
Peach orchards will produce less fruit.
Answers
Answer:
fewer peaches will be sold
Explanation:
if the price increases less people will want to buy it, but the orchards would still get money so they wouldnt be affected
Answer:
fewer peaches
Explanation:
Determine if the following reaction is a redox reaction. Use evidence from the equation to explain your reasoning.
Answers
A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.
The following reaction is a redox reaction based on the following evidence: 2Al + 3FeO → Al2O3 + 3Fe2+ In this reaction, Fe is being reduced because the FeO is changing to Fe2+. Additionally, the Al is being oxidized because it is losing electrons and forming Al2O3. Therefore, the reaction is a redox reaction. Let us take a look at the oxidation state of the elements in the given equation. Oxidation state of Al: (2) for the reactant and (3+) for the product. Oxidation state of Fe: (2+) for the reactant and (2+) for the product. Oxidation state of O: (-2) for the reactant and (-2) for the product. We can tell that oxidation is happening because of the increase in the oxidation state of Al from 2 to 3+. We can tell that reduction is happening because of the decrease in the oxidation state of Fe from 2+ to 2. As a result, the given equation is a redox reaction.For such more question on oxidizes
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A 0.477 mol sample of O_2 gas has a volume of 11.3 L at a certain temperature and pressure. If all this O_2 were converted to ozone (O_3) at the same temperature and pressure, what is the ozone volume (in liters)? 3 O_2(g) → 2 O_3(g)
Answers
Answer:
The volume of ozone produced is 7.53 L.
Explanation:
The reaction is:
3O₂(g) → 2O₃(g) (1)
0.477 mol V=?
11.3 L
From the reaction (1) we have that 3 moles of O₂ produce 2 moles of O₃ so the volume of the ozone produced can be calculated as follows:
\( V_{O_{3}} = V_{O_{2}}*\frac{n_{O_{3}}}{n_{O_{2}}} = 11.3 L*\frac{2}{3} = 7.53 L \)
Therefore, the volume of ozone produced is 7.53 L.
I hope it helps you!
The ozone volume (in liters) is 7.53 L.
The calculation is as follows:
The volume of the ozone in liters should be
\(= 11.3 \times 2\div 3\)
= 7.53L
we have that 3 moles of O₂ produce 2 moles of O₃
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Help with chem
please write the formula for
nickel(IV) sulfite.
Answers
10 Which statement correctly describes the location and charge of the electrons in an atom?
F The electrons are inside the nucleus and have no charge.
G The electrons are outside the nucleus and have no charge.
H The electrons are inside the nucleus and have a negative charge.
The electrons are outside the nucleus and have a negative charge.
which is correct
Answers
Answer:
D. The electrons are outside the nucleus and have a negative charge.
Explanation:
Electrons are located outside the nucleus while protons and neutrons are located inside the nucleus.
Electrons are negatively charged and attracted to nucleus as the nucleus carry protons that are positively charged and neutrons have no charge.
Electrons are arranged in different energy levels based on the attraction between the positively charged nucleus and negatively charged electron.
Hence, the correct answer is "D. The electrons are outside the nucleus and have a negative charge."
A(n) _____ may be defined as a compound which contributes hydroxide ions or increases the OH- concentration when dissolved in water.
salt
base
ester
acid
Answers
Answer:
Base
Explanation:
Bases on dissolving with water release hydroxide ions
Take a example of Sodium hydroxide
NaOH+H_2O-->Na_0+OH-Write formulas and other symbols for these substances.
a. Sulfur trioxide (SO3) gas
b. Potassium nitrate (KNO3) dissolved in water
c. Heat supplied to a chemical reaction
d. Metallic copper
e. Liquid mercury
f. Zinc chloride (ZnCl2) as a catalyst
Answers
The chemical formula of mentioned substances is as follows 1) SO₃ 2) K\(^+\) and NO₃\(^-\) 3) ΔH 4) Cu 5) Hg (l) 6)ZnCl₂.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
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Write the following metals using Roman numeral notation. Then, explain why the Roman numeral differs for these metals.
Answers
The metals you're referring to are likely the transition metals, which can have multiple oxidation states. However, you haven't specified the metals or their oxidation states. For example, iron (Fe) can have an oxidation state of +2 or +3, which we would write as Fe(II) or Fe(III) using Roman numerals. Please provide the metals and their oxidation states for a complete answer.
Roman numeral notation is used to indicate the oxidation state of a transition metal.
Transition metals can have multiple oxidation states due to their electron configurations, which involve partially filled d-orbitals.
These varying oxidation states lead to different chemical properties and reactivity for the metal. To differentiate between the multiple oxidation states of a transition metal, we use Roman numerals in parentheses after the metal symbol.
Roman numeral notation is a helpful tool to indicate the oxidation state of transition metals, which have multiple oxidation states due to their electron configurations.
By using Roman numerals, we can clearly specify the oxidation state of a metal and avoid confusion in chemical equations and reactions. Please provide the metals and their oxidation states for a complete answer using Roman numeral notation.
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A thermos contains 150 cm3 of coffee at 85 8C. To cool the coffee, you drop two 11-g ice cubes into the thermos. The ice cubes are initially at 0 8C and melt completely. What is the final temperature of the coffee
Answers
The final temperature of the coffee in the thermos will be a result of the heat transfer between the coffee and the melting ice cubes.
When the ice cubes are dropped into the thermos containing coffee, heat transfer occurs between the two substances until they reach thermal equilibrium. The heat transfer process involves the transfer of heat from the coffee to the ice cubes, causing them to melt.
To calculate the final temperature, we can use the principle of conservation of energy. The heat gained by the ice cubes equals the heat lost by the coffee.
First, let's calculate the heat gained by the ice cubes. The specific heat capacity of ice is approximately 2.09 J/g°C. Since each ice cube weighs 11 g and starts at 0°C, the heat gained by the ice cubes is:
Q_ice = (mass_ice) x (specific heat capacity_ice) x (change in temperature)
= (11 g) x (2.09 J/g°C) x (final temperature - 0°C)
Next, let's calculate the heat lost by the coffee. The specific heat capacity of coffee is assumed to be the same as water, which is approximately 4.18 J/g°C. The initial temperature of the coffee is 85°C, and its volume is 150 cm³. Using the density of water (1 g/cm³), we can find the mass of the coffee
mass_coffee = (density_water) x (volume_coffee)
= (1 g/cm³) x (150 cm³)
Q_coffee = (mass_coffee) x (specific heat capacity_coffee) x (final temperature - 85°C)
Since the heat gained by the ice cubes is equal to the heat lost by the coffee, we can set up the equation:
Q_ice = Q_coffee
Substituting the respective values and solving the equation will give us the final temperature of the coffee.
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Science investigation skills
Answers
I need help please help me
Answers
chemical potential energy, thermal energy, electrical energy, sound energy
Explanation:
the coal is chemical potential energy because it is just sitting there, the coal fueled power plant is thermal energy because it is using the heat from the coal to work the power plant, that is then turned into electrical energy, which then goes to the radio which displays sound energy
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