Answer:
4 Co(s) + 3 O2(g) = 2 Co2O3(s)
Explanation:
The balanced equation for Co+O₂=Co₂O₃ is Co+2O₂=Co₂O₃
In the equation balancing of Co+O₂=Co₂O₃ ,some points needs to be taken
which involves ensuring that the number of elements on the left hand side is
the same as that on the right hand side.
In this scenario, the number of carbon is the same on both sides but the
difference is in the number of moles of oxygen in which 2 is added to the left
hand side to make it balanced.
Co+2O₂=Co₂O₃
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How far in advance is weather forecasting most accurate?
one week
one month
multiple years
multiple months
Answer:
One week.
Explanation:
I would think one month because on weather websites you can see a month of weather. But the closer the day your looking at the prediction will be more accurate.
The most accurate range of data for weather forecasting is: A. one week.
What is weather?Weather can be defined as the average atmospheric conditions of a particular area (region) over a short period of time.
The elements of weather.Some examples of the elements of weather include the following:
PrecipitationAtmospheric pressureRelative humidityWind speedTemperatureIn meteorology, the most common forecasted element of weather is temperature (degree of hotness or coldness) and it usually done a weekly basis such as one week.
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Suppose your metal sample is hammered into the shape of a thin coin with a diameter of 8.62 cm. Determine the thickness (in mm) of this metal sheet. Use the measured metal mass and true denisty of your metal for this calculation.
measured metal mass: 83.956 g
true density: 8.90 g/cm3
Answer:
The thickness of the metal sheet is 0.162 centimeters.
Explanation:
If mass within the coin is uniformly distributed, then the density ([tex]\rho[/tex]), measured in grams per cubic centimeter, can be represented by the following formula:
[tex]\rho = \frac{m}{\frac{\pi}{4}\cdot D^{2}\cdot z }[/tex] (1)
Where:
[tex]m[/tex] - Mass, measured in grams.
[tex]D[/tex] - Diameter, measured in centimeters.
[tex]z[/tex] - Thickness, measured in centimeters.
If we know that [tex]m = 83.956\,g[/tex], [tex]D = 8.62\,cm[/tex] and [tex]\rho = 8.90\,\frac{g}{cm^{3}}[/tex], then the thickness of the coin is:
[tex]z = \frac{m}{\frac{\pi}{4}\cdot D^{2}\cdot \rho }[/tex]
[tex]z = \frac{83.956\,g}{\frac{\pi}{4}\cdot (8.62\,cm)^{2}\cdot \left(8.90\,\frac{g}{cm^{3}} \right) }[/tex]
[tex]z = 0.162\,cm[/tex]
The thickness of the metal sheet is 0.162 centimeters.
how does the disturbance travel through the coil when you move your arm back and forth?
Answer:
The waves travel in a direction parallel to direction of the vibration of the medium
The waves travel in a direction parallel to direction of the vibration of the medium
what is mechanical wave ?A mechanical wave is defined as an oscillation of matter which is responsible for energy transfer via medium.
The propagation of wave is limited by the medium of transmission, the oscillating material which revolve around a fixed point with little translational motion.
A surface wave which is an example of mechanical wave that propagate along the interface of two different media in physics. other common examples are Gravity waves on the surface of liquids, ocean waves.
Surface wave can be propagated in a slow way through Earth material and are generally lower in frequency than body waves.
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Why does a circuit need to connect the negative to the positive sides of a battery?
How many electrons can be described by the following quantum numbers: n=2, 1=-1, m-1.
Answer:
6 electrons
Explanation:
The principal quantum number n; describes the energy level and here, it is 2.
The azimuthal or secondary quantum number l is given as 1, we are describing the p-orbital
The magnetic quantum number is -1, and we have 3 sub-orbitals here:
It is a 2p-suborbital
So; in each sub orbital we have 2 electrons
The number of electrons that can be described here = 2 x 3 = 6 electrons.
C3H8 + 5 O2 → 3 CO2 + 4 H2O
How many grams of oxygen does it take to produce 90.6 grams of Carbon Dioxide
Answer:
Mass = 112 g
Explanation:
Given data:
Mass of CO₂ produced = 90.6 g
Mass of oxygen needed = ?
Solution:
Chemical equation:
C₃H₈ + 5O₂ → 3CO₂+ 4H₂O
Number of moles of CO₂:
Number of moles = 90.6 g/ 44 g/mol
Number of moles = 2.1 mol
Now we will compare the moles of CO₂ and oxygen:
CO₂ : O₂
3 : 5
2.1 : 5/3×2.1 = 3.5
Mass of oxygen needed:
Mass = number of moles × molar mass
Mass = 3.5 mol × 32 g/mol
Mass = 112 g
What is the correct name of CUCIO2
Chemistry
Answer:
Copper(II) Chlorite = Cu(ClO2)
Explanation:
how you write the compound is very important as well
If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law?
a.the molar amount of the gas
b.the partial pressure of the gas
c.the standard temperature and pressure
d.the molar mass
Answer:
the moral amount of the gas.
.What type of energy includes both kinetic and potential energy?
Answer:
mechanical energy
Explanation:
What is the frequency of a photon that has a wavelength of 6.58 x 10-8m?
Answer:
6 x 10 (power to the 15) H2
Answer:
i dont know the answer but you could search up photon calculator, hope this helps (im very sorry i couldnt help but i havent learned about that yet, im in 9th grade)
Need help asap!
1. Given that the electronegativity of sulfur (S) is 2.5 and that of silicon (Si) is 1.8, which of the following best describes the chemical bonding in silicon monosulfide (SiS)?
A. ionic: transfer of electrons from silicon to sulfur
B. nonpolar covalent: equal sharing of electrons between silicon and sulfur
C. polar covalent: electrons shared between silicon and sulfur but attracted more to the sulfur
D. polar covalent: electrons shared between silicon and sulfur but attracted more to the silicon
2. Which of the following is a molecular compound?
A. Mg3N2
B. NH3
C. AlCl3
D. LiBr
3. Potassium (K) reacts with a certain nonmetallic element (Z) to form a compound with the general formula KZ; where element Z is a diatomic gas at room temperature. What is element Z?
A. Oxygen
B. Fluorine
C. Nitrogen
D. Hydrogen
Answer: 1. C. polar covalent: electrons shared between silicon and sulfur but attracted more to the sulfur
2. B) [tex]NH_3[/tex]
3. B) Fluorine
Explanation:
1. A polar covalent bond is defined as the bond which is formed when there is a difference of electronegativities between the atoms.
Electronegativity difference = electronegativity of sulphur- electronegativity of silicon = 2.5 -1.8 = 0.7
Thus as electronegativity difference is less than 1.7 , the cond is polar covalent and as electronegativity of sulphur is more , the electrons will be more towards sulphur.
2. A molecular compound is usually composed of two or more nonmetal elements. Example: [tex]NH_3[/tex]
Ionic compound is formed by the transfer of electrons from metals to non metals. Example: [tex]Mg_3N_2[/tex] , [tex]AlCl_3[/tex] and [tex]LiBr[/tex]
3. For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here K is having an oxidation state of +1 and as the compound formed is KZ, the oxidation state of non metallic element Z should be -1. Thus the element Z is flourine which exists as diatomic gas [tex]F_2[/tex]
number the steps for balancing equations:
O Use coefficients to increase the atoms on each side.
O Check to make sure you have the same number of each type of atom on each side.
O Count the atoms on each side.
O Identify the atoms on each side.
Explanation:
In balancing chemical equations, the law of conservation of matter must be strictly obeyed.
By the virtue of this, the following steps are usually taken:
First identify the atoms on each side of the expression. This to know the number of species to balance. Then count the atoms on each side. Then using appropriate number as the coefficients, increase the atom on each side until there are equal numbers on both sides. Finally, check to make sure we have the same number of each type of atom on each side.Answer:
the answer would be 3 4 2 1
Explanation:
PLEASE HELP WHICH ONE IS IT AND CAN YOU EXPLAN HOW YOU GOT THE ANSWERS TY!!!
In a titration, a 20 mL sample of NaOH(aq) was neutralized by 14.9 mL of 0.13 mol/L
H2SO4(aq). The concentration of the base is
A)8.7 mol/L
B)10.048 mol/L
C)0.19 mol/L
D)0.35 mol/L
/L
Answer:
C)0.19 mol/L .
Explanation:
Hello!
In this case, since the chemical reaction between sodium hydroxide and sulfuric acid is:
[tex]H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O[/tex]
Whereas a 1:2 mole ratio is seen between the acid and the base, we can write:
[tex]2*M_{acid}V_{acid}=M_{base}V_{base}[/tex]
In such a way, we solve for the concentration of base and plug in to obtain:
[tex]M_{base}=\frac{2*M_{acid}V_{acid}}{V_{base}} \\\\M_{base}=\frac{2*0.13mol/L*14.9mL}{20mL} \\\\M_{base}=0.19mol/L[/tex]
Thus, the answer is C)0.19 mol/L
Best regards!
What is the mass of .89 moles of lithium metal, used in laptop batteries?
The mass of lithium metal that is used in lithium batteries is 6.17 grams, this can be calculated by using number of moles formula.
Number of moles:It is defined as the ratio between mass and molar mass.
It is given by:
Number of moles = mass / Molar mass
What information do we have?
Number of moles= 0.89 moles
Molar mass of Lithium metal= 6.941 g/mol
To find:
Mass of Lithium metal=?
On substituting the values
n= m/M
0.89 = m/ 6.941
m= 0.89*6.941
m= 6.177 grams
Thus, the mass of lithium metal is 6.177 grams.
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Sulfur dioxide (SO2) is an unwelcome result
of burning soft coal in power plants. Some
of the SO2 ends up as sulfuric acid in acid
precipitation. The net reaction is
2 SO2(g) + O2(g) + 2 H2O(l) —— 2 H2SO4(l)
What mass in grams of SO2 is needed to
react with 1771 g of O2?
Answer in units of g.
Answer:
I believe it is 1771 divided by 4
Explanation:
A chemist prepares a solution of silver (I) perchlorate (AgCIO4) by measuring out 134.g of silver (I) perchlorate into a 50.ml volumetric flask and filling the flask to the mark with water. calculate the concentration in mol/L of the silver (I) perchlorate soluation
Answer:
13 M
Explanation:
Molar mass of AgCIO4 = 207 g/mol
Number of moles of AgCIO4= 134/207= 0.65 moles
Number of moles= concentration × volume
Concentration = number of moles/volume
Concentration = 0.65 × 1000/50 = 13 M
What is true about atomic radius trends on the periodic table?
A. Atomic radius decreases along periods and decreases down groups.
B. Atomic radius decreases along periods and increases down groups.
C. Atomic radius increases along periods and decreases down groups.
D. Atomic radius increases along periods and increases down groups.
It is not b
Answer:
D
Explanation:
Just took the test, Hope this helps!
Answer:
B. Atomic radius decreases along periods and increases down groups.
Explanation:
It decreases in period because of addition of proton effective nuclear charge increase and atomic radius decreases.
Atomic radius increases in group because of addition of shells
Measure that affects the thermal energy of matter but not it's temperature.
Answer: mass
Explanation:
The following chemical reaction takes place in aqueous solution:
AgF(aq)+Nal(aq) ——> Agl(s)+NaF(aq)
Write the net ionic equation for this reaction.
The net ionic equation : Ag⁺(aq)+l⁻(aq) ⇒ Agl(s)
Further explanationGiven
Reaction
AgF(aq)+Nal(aq) ——> Agl(s)+NaF(aq)
Required
The net ionic equation
Solution
The equation of a chemical reaction can be expressed in the equation of the ions
In the ion equation, there is a spectator ion that is the ion that does not react because it is present before and after the reaction
When these ions are removed, the ionic equation is called the net ionic equation
AgF(aq)+Nal(aq) ——> Agl(s)+NaF(aq)
Ag⁺(aq)+F⁻(aq)+Na⁺(aq)+l⁻(aq) ⇒ Agl(s)+Na⁺(aq) + F⁻(aq)
Ag⁺(aq)+l⁻(aq) ⇒ Agl(s)
CaC12 + NaCO3–>CaCO3 +NaC1
when the equation above is correctly balanced with integer coefficients the sum of the coefficients is
A:4
B:5
C:6
D:10
What is MnF3 + AL ? If anyone would
Be so kind
Name a famous transform fault in western North America
Answer:
Read this section of the text:
These raptors eat primarily flying insects, so they do most of their hunting on the wing.
What does primarily mean in this sentence?
Explanation:
I'm bored
What happens to the number of protons in a cation?
Answer:
number of protons is more than the number of electrons.
Explanation:
A cation is a positively charged ion.
An ion is an atom that has lost or gained electron(s). In an ion, the number of protons and electrons are not the same.
Number of protons is the number of positively charged particles
Number of electrons is the number of negatively charged particles.
For a cation, which is positively charged, the number of protons is more than the number of electrons.
Therefore, in cations, we have more protons than electrons.
Analysis of an unknown substance indicates that it is a brittle solid. It acts as an electrical insulator (does not conduct) as a solid but conducts electricity when melted. Which of the following substances would have these characteristics?
a. HCl
b. Al
c. KBr
d. SiF4
e. I2
Answer:
KBr
Explanation:
A metal has a very high melting point. Aluminum is a metal.
Ionic solids do not conduct electricity in the solid state. However, when the solids are melted, they conduct electricity.
KBr is an ionic substance, it can only conduct electricity in molten form because the ions are locked up in the solid.
Think of 6 to 10 questions that ask participants how they keep (or kept) their
homes or businesses warm in cold weather and cool in hot weather. Your
questions may ask about the types of devices used, the sources of energy
used to run the devices, the effectiveness of the methods used, or effects on
the environment. worth 100 points!!
Answer:
One could be What kind of insulator do you use in the winter?
Explanation:
6. What is the equilibrium constant for the following reaction?
C+02 = CO2
Given
Reaction
C+02 = CO2
Required
The equilibrium constant
Solution
The equilibrium constant is the ratio of concentration or pressure between the product and the reactant with each reaction coefficient raised
The equilibrium constant is based on the concentration (Kc) in a reaction
pA + qB -----> mC + nD
[tex]\large {\boxed {\bold {Kc ~ = ~ \frac {[C] ^ m [D] ^ n} {[A] ^ p [B] ^ q}}}}[/tex]
So for the reaction :
C+O₂ ⇔ CO₂
[tex]\tt Kc=\dfrac{[CO_2]}{[C][O_2]}[/tex]
Using the phase diagram for CO2, what phase is carbon dioxide in at -20°C
and 1 atm pressure?
A. It is in the gas phase.
B. It is in the solid phase.
C. It is at its boiling point.
D. It is in the liquid phase.
A. It is in the gas phase. The carbon dioxide in at -20°C and 1 atm pressure is in the gas phase.
What does carbon dioxide look like at 20 C?Carbon dioxide is an odorless, colorless, barely acidic, and non-flammable gas at room temperature (20–25 C). A molecule having the chemical formula CO2 is carbon dioxide.
What can we infer about water and carbon dioxide from their phase diagrams?The general Y-shape of the phase diagrams for water and carbon dioxide is the same, although they are offset from one another. This change happens because the liquid phase in ice can occur at lower temperatures and pressures than it can in dry ice, which can only happen at greater temperatures and pressures.
Is there a liquid phase of CO2?A gas, solid, or liquid form of carbon dioxide is possible. Beer and soft drinks are generally carbonated using gaseous carbon dioxide. It also functions as a chemical in the purification of water.
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PLZ HELP BEING TIMED!!! PLZ ANSWER!!!!
Answer:its going to be a
Explanation:
Answer:
it will option A bcs motion increases when temp increases
Who first purpose the theory of continental drift
Answer:
The theory of continental drift is most associated with the scientist Alfred Wegener. In the early 20th century, Wegener published a paper explaining his theory that the continental landmasses were “drifting” across the Earth, sometimes plowing through oceans and into each other.
Explanation:
PLEASE MARK ME AS BRAINLIEST
Answer:
The scientist Alfred Wegener.
Explanation:
What type of crust is colliding?
Japan Trench
Eurasian Plate
Pacific Plate
Answer: The Eurasian Plate or both the Eurasian and Pacific Plate.
Explanation: