Answer:
coefficients: 4, 3, 2
Explanation:
58.0 g of K2SO4 was dissolved in 500 g of water.
What is the molality of the solution? (Molar mass of
K2SO4 = 174.0 g/mol)
m
Round your answer to the nearest hundredth. Do not include units
in your answer.
Answer:
0.67
Explanation:
Molality is mols of solute over kilograms of solvent
there are 58/174 mols of solute, and 0.5 kg of solvent
(58/174)/0.5=0.6666...
Round to the nearest hundreth to get 0.67
free brainiest to whoever writes me the best love note! :) <3 dont miss the opportunity!!!
Answer:
Hi! I hope you're having a wonderful day, if not, I hope it gets better, much love and kindness! Be great!
Why would 60g at 10C of NaCl in 200g of water would be unsaturated?
Answer:
The amount of substance needed to saturate water increases as the temperature increases.
Explanation:
The mass and distance between two objects affects the strength of gravitational force.
What factors do you think might affect the strength of the electric force?
When referring to immunity, what does the term innate imply?
the mechanism will provide defense against many different types of pathogens
the mechanism will develop based upon exposure to specific pathogens
the mechanism will be built-in and present at birth
the mechanism will be acquired over an individual's lifetime
Answer:
Innate, or nonspecific, immunity is the defense system with which you were born. It protects you against all antigens. Innate immunity involves barriers that keep harmful materials from entering your body.
Spring tides happen 2 times each month at the _and_phases
Neap tides happen 2 times each month at the _and_phases
Answer:
Spring tides happen 2 times each month at the New and Full phases
Neap tides happen 2 times each month at the First Quarter and Third Quarter phases
Silver + ... → Silver oxide
Answer:
Silver+ Hydroxide--> Silver oxide+ Water
When the maturities of a bond issue are spread over several dates, the bonds are called.
What can you infer about magnetic domains from the fact that they are arrangements of atoms?.
Explanation:
Q. What can you infer about magnetic domains from the fact that they are arrangements of atoms? The individual domains are extremely small.
In ferromagnetic materials, smaller groups of atoms band together into areas called domains, in which all the electrons have the same magnetic orientation. That's why you can magnetize them.An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity.The balanced equation for the aerobic reaction is:
Zn + 2 HCl → ZnCl2 + H2
How much hydrogen gas is produced from 5 g of HCl?
Answer:
1.85 g of hydrogen gas will form!
Explanation:
1. Write the balanced equation.
Zn
+
2HCl
→
ZnCl
2
+
H
2
2. Calculate the moles of
Zn
.
Moles of Zn
=
30.0
g Zn
×
1 mol Zn
65.38
g Zn
=
0.4589 mol Zn
3. Calculate the moles of
H
2
.
Moles of H
2
=
0.4589
mol Zn
×
2 mol H
2
1
mol Zn
=
0.9177 mol H
2
4. Calculate the mass of
H
2
.
Mass of H
2
=
0.9177
mol H
2
×
2.016 g H
2
1
mol H
2
=
1.85 g H
2
all in a day's work cryptogram
Answer:
yup!
Explanation:
i dont know what else to say.
What can a swarm of grasshoppers do to a farmers crop?
It could destroy the crops by jumping all over them
In another experiment the student turreted 50.0
Answer:
is this a full question ????
Explanation:
In order to make a covalent bond, the orbitals on each atom in the bond must overlap.
Answer:
true
Explanation:
Covalent bonds are formed through the overlap of half-filled valence orbitals. Because of the overlapping, it is most probable that electrons are located within the region of the bond.
In order to make a covalent bond, the orbitals on each atom in the bond must overlap. Therefore, the given statement is true.
What is covalent bond?A covalent bond is an electron exchange usually results in the production of electron pairs between atoms. These electron couples are referred to as bonding pairs as well as sharing pairs. Covalent bonding seems to be the permanent equilibrium of atoms' forces of attraction versus attraction when atoms share electrons.
Because to electron sharing, each atom in a number of molecules can achieve the corresponding amount of the valence shell, resulting inside a stable electronic configuration. In organic chemistry, covalent bonds are far more common than ionic ones. In order to make a covalent bond, the orbitals on each atom in the bond must overlap.
Therefore, the given statement is true.
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Since helium is lighter than air, it is difficult to measure the mass of a sample, so to find out the mass of helium in a birthday balloon, a student transferred the helium to a fixed 1. 50 l vessel at 25. 0 °c and found the pressure to be 3. 04 atm. What mass of helium is in the balloon in grams?.
A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.
What is an ideal gas?An ideal gas is that whose particles have negligible volume and intermolecular forces.
A 1.50 L vessel at 25.0 °C contains He at a pressure of 3.04 atm.
Step 1. Convert 25.0 °C to Kelvin.We will use the following expression.
K = °C + 273.15 = 25.0 + 273.15 = 298.2 K
Step 2. Calculate the moles of He.We will use the ideal gas equation.
P × V = n × R × T
n = P × V / R × T
n = 3.04 atm × 1.50 L / (0.0821 atm.L/mol.K) × 298.2 K = 0.186 mol
Step 3. Calculate the mass of He.The molar mass of He is 4.00 g/mol.
0.186 mol × 4.00 g/mol = 0.744 g
A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.
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During winter in cold climates, salt is often used on roads to prevent the buildup of slippery ice. Although salt may make driving safer, it can cause the metallic parts of cars to corrode or rust relatively quickly. In a few sentences, please explain what is occurring.
Answer:
this is because the salt may be acidic and also may have oxygen substituent which can lead to rust
During cold winters, the salt present on the roads reacts with the iron and the dew water and results in the formation of the iron oxide as rust.
What is rust?The rust has been given as the iron oxide compound, that has been formed with the reaction of the water with the iron in the presence of oxygen.
In the winters, there has been the presence of the water in the salt, and the interaction of the salt with the iron to form the iron oxide that is rust.
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Please answer.
A solar energy project is expected to have capital costs of $995,000, average yearly operating costs of $175,000, and a lifetime of 25 years. If the total production during the lifetime of the project is 89,500,000 kWh, what is the Levelized cost of energy (LCOE)?
a.$0.60 per kWh
b.$0.77 per kWh
c.$0.06 per kWh
d.$0.07 per kWh
Which of the following is a characteristic of Levelized cost of energy (LCOE)?
a. It is the minimum price per kWh at which electricity must be sold to break even over the lifetime of a power-generating project.
b. It is the maximum amount of power that can be produced per dollar over the lifetime of a power-generating project.
c. It is the maximum price per kWh at which electricity must be sold to break even over the lifetime of a power-generating project.
d. It is the minimum amount of power that can be produced per dollar over the lifetime of a power-generating project.
Which of the following statements is true for both solar energy and wind energy?
a. Energy is able to be collected both day and night.
b. Power from this energy source can easily be integrated into existing power grid systems.
c. Power generation using this energy source does not contribute to water pollution.
d. Energy collection equipment can be installed in agricultural areas without affecting crop production.
The Levelized Cost of Energy of the solar plant is $0.60 per kWh.
Solar energy and wind energy can both easily be integrated into existing power grid systems.
What is Levelized Cost of Energy?The Levelized Cost of Energy is a measure of the average net present cost of electricity generation for a generating plant over its lifetime.
The Levelized Cost of Energy of the solar energy product is calculated as follows:
Total cost over 25 years = 995,000, + $175,000 × 25 = $5,370,000
Total energy production over 25 years = 89,500,000 kWh
Levelized Cost of Energy = $5,370,000/89,500,000 kWh
Levelized Cost of Energy = $0.60 per kWh
The Levelized cost of energy (LCOE) is the minimum amount of power that can be produced per dollar over the lifetime of a power-generating project.
For solar energy and wind energy, power from both energy sources can easily be integrated into existing power grid systems.
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Answer:
one.
Which of the following statements is true for both solar energy and wind energy?
Power generation using this energy source does not contribute to water pollution.
2.
Which of the following is a characteristic of levelized cost of energy (LCOE)?
It is the minimum price per kWh at which electricity must be sold in order to break even over the lifetime of a power-generating project.
3.
A solar energy project is expected to have capital costs of $995,000, average yearly operating costs of $175,000, and a lifetime of 25 years. If the total production during the lifetime of the project is 89,500,000 kWh, what is the levelized cost of energy (LCOE)?
$0.06 per kWh
Explanation:
if you dont believe me thats all right i did it the answers are 200% you can check it for yourself
Propane gas, C3H8, burns in excess oxygen gas. When the equation for this reaction is correctly balanced and all coefficients are reduced to their lowest whole-number terms, the coefficient for O2 is
(A) 4 (B) 5 (C) 7 (D) 10 (E) 22
Answer:
5
Explanation:
First find the balanced equation for this rxn
C3H8 + 5O2 ====> 3 CO2 + 4 H2O
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. The correct option is option A.
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
Propane gas, C[tex]_3[/tex]H[tex]_8[/tex], burns in excess oxygen gas. When the equation for this reaction is correctly balanced and all coefficients are reduced to their lowest whole-number terms, the coefficient for O[tex]_2[/tex] is 5.
C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex] [tex]\rightarrow[/tex] 3 CO[tex]_2[/tex] + 4 H[tex]_2[/tex]O
Therefore, the correct option is option B.
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Water’s molar mass is 18.01 g/mol. the molar mass of glycerol is 92.09 g/mol. at 25°c, glycerol is more viscous than water. which substance has the stronger intermolecular attraction? glycerol because it has a larger molar mass glycerol because it is more viscous and has a larger molar mass water because it has a lower molar mass water because it is less viscous and has a lower molar mass
Glycerol has the stronger intermolecular attraction because it is more viscous and has a larger molar mass.
What is Viscosity?This is the ability of substances to resist flow and is common among fluids such as air and liquid.
Glycerol however has a stronger intermolecular attraction because it is more viscous and has a larger molar mass because they have a direct relationship.
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Answer:
A-glycerol because it has a larger molar mass
Explanation:
Edge 2022 :)
A sealed flask contains 3.82 x 1024 molecules of CO, How many moles of Co, are in the flask?
Answer:
if you meant 3.82* 10^24, the answer is 6.34551495 moles
if you meant 3.28*1024, the answer is 6.49780731*10^-21 moles
since you're going from molecules to moles, you need to divide by Avogadro's number which is 6.02*10^23
What effect does sunlight have on CO2 molecules?
Answer:
CO2 molecules don't really interact with sunlight's wavelengths. Only after the Earth absorbs sunlight and reemits the energy as infrared waves can the CO2 and other greenhouse gases absorb the energy.
Explanation:
Mark me brainliest pls
Carbon dioxide molecules don't directly react with the sunlight but they can absorb the energy in the form of infrared waves when it is emitted after reflection through the Earth's surface.
What are infrared waves?Infrared radiation (IR), sometimes referred to simply as infrared, is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm).
[tex]CO_2[/tex] molecules don't really interact with sunlight's wavelengths. Only after the Earth absorbs sunlight and reemits the energy as infrared waves can the [tex]CO_2[/tex] and some other greenhouse gases absorb the energy.
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ANSWER FAST PLS ILL GIVE BRAINLY 5. What are animals called that make their homes underground?
grazers
reptiles
burrowers
meat-eaters
Answer:
burrowers
Explanation:
9. In a neutralization reaction, an acid and a base react to produce a an oxide and water.
true/false
Answer and Explanation: The answer is false.
what is density/ how does density work
help help
Answer:
Density is the measurement of how tightly a material is packed together. It is defined as the mass per unit volume. Density Formula: ρ = m/V, where ρ is the density, m is the mass of the object and V is the volume of the object.
Explanation:
Answer:
The mass per unit volume of a substance is called density of that substance.
Explanation:
So, How does it works ?
For example: Density of gold is 19300kg/cubic meter. It means that if there gold having volume of a cubic meter its mass will be 19300 kg... Density of plastics are less than that of density of metals... I.e. if we take plastic having volume 2 cubic meter & gold having volume 1 cubic meter we will find mass of gold is far more compared to that of plastic.. Thus, density refers how much tightly the molecules of a substance are bonded together.
Jin listed some common thermal insulators and conductors in a chart. (attached below)
Which belongs in the area marked with an X?
A.) Iron
B.) Foam
C.) Wood
D.) Glass
Have a great rest of your day
#TheWizzer
Answer:
I would have to say the answer is A) iron. I say this because Iron is one of the most well know conductors and in the chart it as rubber and copper as the two conductors whole Air and Iron should be the x. Plus the rest don't make good conductors they are more insulators. So logicaly it wouldn't make sense to have any of the other answers.
Explanation:
Hope This Helps
Have A Great Day
~Zero~
According to the concept of conduction, iron belongs in the area marked with an X.
What is conduction?Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
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A metal (FW 311.8 g/mol) crystallizes into a face-centered cubic unit cell and has a radius of 2.86 Angstrom. What is the density of this metal in g/cm3
For a metal crystallizes into a face-centered cubic unit cell and has a radius of 2.86 Angstrom, the density is mathematically given as
d=3.31g/cm
What is the density of this metal in g/cm3Generally, the equation for the density is mathematically given as
[tex]d=\frac{2*m}{NA*a^3}\\\\Therefore\\\\d=\frac{2*295.6mol}{6.022*10^23*(6.67*10^{-3})}[/tex]
d=3.31g/cm
In conclusion, the density of this metal
d=3.31g/cm
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3. Classify each reaction as exothermic or endothermic. (4 marks)
a. Energy + SO2(g) S(g) + O2(g) _________________________________
b. Draw a potential energy diagram for the reaction above:
Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction owing to te fact that energy is a reactant in the equation.
What is an endothermic reaction?An endothermic reaction is one in wioch energy is supplied to the system in order to enable the breakdown of bonds. Hence, the reaction vessel feels cool as energy is withdrawn from the surroundings.
The reaction; Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction since energy is a reactant in the equation.
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How many liter are in 55.5 grams of neon?
Which of these potential sources of water pollution is excluded from the clean water act
Answer:
C. Agricultural runoff
Explanation:
sorry if not helps if do im am sooooo happy
What is the molarity of a solution consisting of 105 grams of calcium nitrate and 280. grams of water?
Answer:
About 2.29 M.
Explanation:
Recall that molarity is defined by moles of solute over liters of solution.
Our solute is 105 grams of calcium nitrate (Ca(NO₃)₂)).
Convert 105 grams of Ca(NO₃)₂ to moles. The molecular weight of Ca(NO₃)₂ is 164.10 g/mol:
[tex]\displaystyle 105\text{ g Ca(NO$_3$)$_2$}\cdot \frac{1\text{ mol Ca(NO$_3$)$_2$}}{164.10\text{ g Ca(NO$_3$)$_2$}} = 0.640\text{ mol Ca(NO$_3$)$_2$}}[/tex]
Convert 280. grams of water to liters. Recall that the density of water is given by 1.00 g/mL:
[tex]\displaystyle \begin{aligned} D & = \frac{m}{V} \\ \\ V & = \frac{m}{D} \\ \\ & = \frac{(280.\text{ g})}{\left(\dfrac{1.00\text{ g}}{1\text{ mL}}\right)} \\ \\ & = 280. \text{ mL}\cdot \frac{1\text{ L}}{1000\text{ mL}} = 0.280\text{ L soln.}\end{aligned}[/tex]
Hence, the molarity of the solution is:
[tex]\displaystyle \begin{aligned} \text{M} &= \frac{\text{ mols solute}}{\text{L soln.}} \\ \\ & = \frac{(0.640\text{ mol})}{(0.280\text{ L soln.})} \\ \\ & = 2.29\text{ M} \end{aligned}[/tex]
In conclusion, the solution is about 2.29 M.
