Answer:
its valnce electrons is 2 and the reaction to metal
What must ALWAYS be used to convert between quantities of two different chemical substances?
Answer:
Balanced equations and mole ratios
In general, mole ratios can be used to convert between amounts of any two substances involved in a chemical reaction.
Explanation:
yw
Answer:
ask your mom and your family
Explanation:
tell your mom that she sucks
Match the following vocabulary words with the correct definitions.
1. a liquid changing to a gas
condensation
2. evaporation from plants
transpiration
3. a gas changing to a liquid
precipitation
4. moisture falling to the Earth
evaporation
need help
= Br
= C
Name is
1
, formula is
Answer:
yqujsbr
Explanation:
hejsudh2ihdg4 they t sjh5c4uSvreju5 aur bd84kskythddok6vr for
the reaction that takes place in chemical cell is best classified as. A.fusion B.redox C.transmutation D.redox
The reaction in the chemical cell has been best classified as the redox reaction. Thus, option B is correct.
The reaction cell or the voltaic cell has been the one that has been able to convert electrical energy into chemical energy. In the chemical cell, electrical energy has been provided to the cell for bringing the chemical change.
The chemical change has been brought by the oxidation and reduction of the elements with the application of electric current. The reaction that has been based on the oxidation and reduction of the elements has been termed the redox reaction.
Thus, the reaction in the chemical cell has been best classified as the redox reaction. Thus, option B is correct.
For more information about the chemical cell, refer to the link:
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A bronze bell containing copper and tin is
a. pure substance
b. colloidal suspension
c. a solid solution
d. heterogenous mixture
Answer:
I will go for a heterogeneous mixture
Explanation:
alloy is basically a mixture
Compound A has 4 moles of hydrogen, 4 moles of oxygen, and
1 moles of silicon. The empirical formula of the compound is???
In H4SiO4, the mole ratio of carbon to hydrogen to oxygen is the same as described in the question. Therefore H4SiO4 is the empirical formula
I hope this helps you!!
If the amount of dissolved solute in a solution at a given temperature is greater than the amount that can permanently remain in the solution at that temperature, the solution is said to be
a. diluted.
b. unsaturated.
c. saturated.
d. supersaturated.
that temperature is saturated.
Which of the following statements is correct?
Answer: A
Explanation: i took the test
Which change to this process would shift the equilibrium to produce the
maximum possible amount of S03?
2502 +02 2503 + energy
A. Increasing the temperature
B. Decreasing the pressure
C. Removing the O2 as it forms
D. Removing the SO3 as it forms
The change which shift the equilibrium to produce the maximum possible amount of SO₃ is decreasing the temperature.
What is equilibrium principle?According to this principle if any external stress is applied in the equilibrium state then equilibrium will shift towards that side where the external stress will decreases.
In the given chemical equation energy is releases in the form of heat, then in this condition:
Increase in temp will shift the reaction towards the reactant side.Decreasing the pressure will also lead to the decrease in the temperature and in this condition reaction will shift towards product side and will increases the amount of SO₃.Removing the oxygen and SO₃ will not help in increasing the amount of SO₃.Hence decreasing the temperature will produce maximum SO₃.
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2 C4H10 + 13 O2 ---> 8 CO2 + 10 H2O 4. You have 35.25 L of C4H10 what is the theoretical yield in grams of carbon dioxide?
Answer:
277.0g of CO₂ is theoretical yield
Explanation:
In the reaction, 2 moles of C₄H₁₀ react with 8 moles of CO₂.
To solve this question, we must convert the volume of the C₄H₁₀to moles. Then, using the chemical reaction, find the moles of CO₂ produced and its mass as follows:
PV = nRT
Assuming STP conditions:
P = 1atm
V = 35.5L
n are moles
R = 0.082atmL/molK
T = 273.15K
Replacing:
n = PV/RT
n = 1atm*35.25L / 0.082atmL/molK*273.15K
n = 1.574 moles C₄H₁₀
Assuming all these moles are converted in CO₂ (theoretical yield), the moles of carbon dioxide are:
1.574 moles C₄H₁₀ * (8mol CO₂ / 2mol C₄H₁₀) = 6.295 moles CO₂
And the theoretical yield in mass is:
6.295 moles CO₂ * (44.01g / mol) =
277.0g of CO₂ is theoretical yieldWhich of the following compounds would most likely be the reactants in a combustion reaction?
sulfuric acid and water
oxygen and hydrocarbon
oxygen and carbon dioxide
carbon dioxide and hydrocarbon
Answer:
reaction between oxygen and hydrocarbon is combustion
The compound would most likely be the reactants in a combustion reaction is oxygen and hydrocarbon.
What is combustion reaction?Those reaction in which a fuel will change into a water molecule and carbon dioxide gas, in the presence of oxygen is known as combustion reaction.
Combustion reaction will represent as:
CₓHₙ + O₂ → H₂O + CO₂, where
CₓHₙ is a hydrocarbon which gets oxidized in the presence of oxygen oxidant.
Hence option (2) is correct i.e. oxygen and hydrocarbon.
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5. Based on Reference Table F, which of the following saturated solutions would be the least concentrated?
1) copper (II) sulfate 2) barium sulfate
3) sodium sulfate 4) potassium sulfate
Answer:
barium sulfate
Explanation:
Calculate the volume of 5.0 grams of NO gas at STP.
Answer:
The volume of 5.0 g CO 2 is 2.6 L CO 2 at STP
Explanation:
STP
STP is currently
0
∘
C
or
273.15 K
, which are equal, though the Kelvin temperature scale is used for gas laws; and pressure is
10
5
.
Pascals (Pa)
, but most people use
100 kPa
, which is equal to
10
5
.
Pa
.
You will use the ideal gas law to answer this question. Its formula is:
P
V
=
n
R
T
,
where
P
is pressure,
V
is volume,
n
is moles,
R
is a gas constant, and
T
is temperature in Kelvins.
Determine moles
You may have noticed that the equation requires moles
(
n
)
, but you have been given the mass of
CO
2
. To determine moles, you multiply the given mass by the inverse of the molar mass of
CO
2
, which is
44.009 g/mol
.
5.0
g CO
2
×
1
mol CO
2
44.009
g CO
2
=
0.1136 mol CO
2
Organize your data
.
Given/Known
P
=
100 kPa
n
=
0.1136 mol
R
=
8.3145 L kPa K
−
1
mol
−
1
https://en.wikipedia.org/wiki/Gas_constant
T
=
273.15 K
Unknown:
V
Solve for volume using the ideal gas law.
Rearrange the formula to isolate
V
. Insert your data into the equation and solve.
V
=
n
R
T
P
V
=
0.1136
mol
×
8.3145
.
L
kPa
K
−
1
mol
−
1
×
273.15
K
100
kPa
=
2.6 L CO
2
rounded to two significant figures due to
5.0 g
Answer link
Doc048
May 18, 2017
I got 2.55 Liters
Explanation:
1 mole of any gas at STP = 22.4 Liters
5
g
C
O
2
(
g
)
=
5
g
44
(
g
mole
)
=
0.114
mole
C
O
2
(
g
)
Volume of 0.114 mole
C
O
2
(
g
)
= (0.114 mole)(22.4 L/mole) = 2.55 Liters
C
O
2
(g) at STP
A brick has a mass of and the Earth has a mass of . Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of bricks? Round your answer to 2 significant digits. How many moles of bricks have a mass equal to the mass of the Earth? Round your answer to 2 significant digits.
The given question is incomplete. The complete question is:
A brick has a mass of 4.0 kg and the earth has a mass of [tex]6.0\times 10^{27}g[/tex] Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of bricks? Round your answer to 2 significant digits. How many moles of bricks have a mass equal to the mass of the Earth? Round your answer to 2 significant digits.
Answer: The mass of 1 mole of bricks is [tex]2.4\times 10^{27}g[/tex]
2.5 moles of bricks have a mass equal to the mass of the Earth
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
Mass of 1 brick = 4.0 kg = 4000 g (1kg=1000g)
Thus mass of 1 mole of brick or [tex]6.023\times 10^{23}[/tex] bricks will be = [tex]\frac{4000g}{1}\times 6.023\times 10^{23}=2.4\times 10^{27}g[/tex]
The mass of 1 mole of bricks is [tex]2.4\times 10^{27}g[/tex]
Now [tex]2.4\times 10^{27}g[/tex] will correspond to = 1 mole of bricks
[tex]6.0\times 10^{27}g[/tex] will correspond to =[tex]\frac{1}{2.4\times 10^{27}}\times 6.0\times 10^{27}=2.5moles[/tex]
2.5 moles of bricks have a mass equal to the mass of the Earth
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?
__Ca + __H20 --> __Ca(OH)2 + __H2
2 Ca + 2H2O ⇒ 2 Ca(OH)2 + H2
Explanation: number of atoms of every element
Need to be equal in both sides
The right ratio of chemicals for the balanced chemical equation is 2Ca + 2H₂O ⇒ 2 Ca( OH )₂ + H₂.
What is balanced chemical equation ?A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.
Because mass cannot be generated or destroyed, according to the rule of conservation of mass, a chemical equation must always be in balance.
A chemical equation must be balanced. This is so that it can convey how many moles are reacting and creating. The amount of electrons that are transferred from one substance to another is also indicated. An equation that balances or is balanced also describes how energy is changed.
Thus, the balanced chemical equation is 2Ca + 2H₂O ⇒ 2 Ca( OH )₂ + H₂.
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Q: How does the starting
position affect the speed of a
ball rolling down a ramp?
I NEED HELPP PLSSS ASAP!!!
The force of gravity points straight down, but a ball rolling down a ramp doesn't go straight down, it follows the ramp. Therefore, only the component of the gravitational force which points along the direction of the ball's motion can accelerate the ball. The other component pushes the ball into the ramp, and the ramp pushes back, so there is no acceleration of the ball into the ramp. If the ramp is horizontal, then the ball does not accelerate, as gravity pushes the ball into the ramp and not along the surface of the ramp. If the ramp is vertical, the ball just drops with acceleration due to gravity. These arguments are changed a bit by the fact that the ball is rolling and not sliding, but that only affects the magnitude of the acceleration but not the fact that it increases with ramp steepness.
You add 0.500 moles of an alcohol to 500 gram of water. The molality of your solution is?
Why is the age of the ocean crust used as evidence for plate tectonics?
Answer:
The great age of continental rocks results from their inability to be subducted. ... We also know that the increase in age of ocean crust away from ocean basins results from creation of new sea floor at the MORs, with destruction of older sea floor at ocean trenches, which are often located near continental margins.
Explanation:
The age of the ocean crust used as evidence for plate tectonics because older ocean crust is being melted back into the mantle at divergent boundaries.Older ocean crust is being melted back into the mantle at divergent boundaries. Therefore, option A is correct.
Why plate tectonics is a theory?Plate tectonics is a theory because it supplies an explanation of why and how segments of the earth displace and make earthquakes and mountains and volcanos.
This states why ocean floor rocks are generally less than 200 million years old whereas the oldest continental rocks are more than 4 billion years old.
The great age of continental rocks effects from their inability to be subducted. We also know that the addition in age of ocean crust away from ocean basins results from activity of new sea floor at the MORs, with destruction of older sea floor at ocean trenches.
Thus, option A is correct.
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Your question is incomplete, most probably your question was
Why is the age of the ocean crust used as evidence for plate tectonics?
A Older ocean crust is being melted back into the mantle at divergent boundaries.Older ocean crust is being melted back into the mantle at divergent boundaries.
B There are striations on the ocean crust where the continental crust moved over the top of it.There are striations on the ocean crust where the continental crust moved over the , top of it.
C Ocean crust is older than continental crust so it shows that the continents are younger.Ocean crust is older than continental crust so it shows that the continents are , younger.
D New ocean crust is being formed at underwater divergent boundaries pushing away older crust.
HURRY! Only 5 minutes to answer!
What causes droughts?
1. Humans
2. Natural Events
3. Aliens from outer space
4. Like with many things about our planet it is caused by Humans and Nature
Answer:
The is 4. Like with many things about our planet it is caused by Humans and Nature, I belive because droughts can be caused by humans and nature.
Explanation: Humans cut trees down trees , which trigger droughts to happen. Also because when humans cut a widespread of trees down just for fuel, it can potentially reduce the soil's ability to hold water ... triggering droughts to happen. But also droughts can happen just by nature.
Calculate the molarity of a solution of monoprotic KHP prepared by mixing a 0.5237 g KHP in 50.0 mL of water .
Answer:
[tex]M=0.0513M[/tex]
Explanation:
Hello!
In this case, since the molarity of a solution is computed by dividing the moles of solute by the volume of solution, we notice we first need the moles of KHP as shown below:
[tex]n=0.5237g*\frac{1mol}{204.22 g} =0.00256mol[/tex]
Next, the volume in liters:
[tex]V=50.0mL*\frac{1L}{1000mL}\\\\V=0.0500L[/tex]
Thus, the molarity turns out to be:
[tex]M=\frac{n}{V}\\\\M=\frac{0.00256mol}{0.05000L} \\\\M=0.0513M[/tex]
Best regards!
you are on vacation with your family up in the mountains. your friend is on vacation near the equator by the ocean.Explain which climate will experience the most precipitation.
A.both climates will have the same amount of precipitation. B.the ocean climate will have less precipitation.C. the mountain climate will have more precipitation. D.the climate around the equator will have more precipitation(this question is for science)
Answer:
option d is right
Explanation:
More precipitation occurs near the equator because it is a tropical area. Mountains receive less than 15 inches of rain per year while the equator area receives a lot of rain. This is due to the very hot weather.
The climate around the equator will have more precipitation because it is very hot.
thats the answer
Is this true or false?
false
true
Answer:
True
Explanation:
Hello! Can someone tell me how fans function and work? And what fans do? Ill include an imagine below! Best answer gets brainliest
Answer:
How fans work....Instead of sucking in hot air and pushing it down, the fan sucks up cool air and pushes it higher. When the fan forces cool air higher, the cool air forces warm air down. Instead of giving you more access to cool air in your room, the fan gives you more access to the warm air, making you feel nice and cozy.
What fans do....A fan, or a breeze, helps by replacing this hot, humid air with cooler, drier air that allows for more evaporation. Similarly, even without sweat, our body loses heat to the surrounding air simply by convection. ... The breeze from the fan carries that hot air away and perpetuates the process, effectively cooling you off.
Explanation:
4. A compound has both ionic and covalent bonds if it contains what?chemistry
Hope this helps! I hope you have a great rest of your day! Also, if you would, please make me brainliest! <3
Why does CH4 have a higher vapor pressure at a given temperature than CH3Cl? Why does CH3OH have a higher vapor pressure at a given temperature than CH3CH2CH2OH? Why does H2CO have a higher vapor pressure at a given temperature than CH3OH?
Explanation:
CH4, methane is a non polar compound whereas CH3Cl is a polar compound because of presence of electronegative element chlorine. Hence, there is a net dipole moment in case of CH3Cl( Chloromethane). This causes CH3Cl to exhibits dipole-dipole intermolecular force of attraction, which is absent in CH4. Therefore, Chloromethane has a lower vapor pressure when compared to methane.
WILL GIVE BRAINLIEST PLS HELP!!
How are air pressure and wind related?
Stronger winds will blow between two regions if they have the same air pressure.
A greater difference in air pressure between two regions will cause stronger winds to blow.
A smaller difference in air pressure between two regions will cause stronger winds to blow.
Winds will always blow from a region of low pressure to a region of high pressure.
Answer:
air presure pushes things and the wind is a gust of air
Explanation:
what can determine from examining the fossil record
Answer:
Fossils are traces of organisms that lived in the past. When fossils are found, they are analyzed to determine the age of the fossil. The absolute age of the fossil can be determined through radiometric dating and determining the layer of rock in which the fossil was found.
Explanation:
Solutions with water as the solvent are called
a.liquids.
b.electrolytic.
c.aqueous solutions.
d.miscible solutions.
Answer:
C. Aqueous Solutions
General Formulas and Concepts:
Aqueous Solutions'
DissociationSolvents and SolutionsExplanation:
Water is the universal solution that solvents are dissolved in. Whenever anything is dissolved in water, it will be an aqueous solution.
Strong ionic solutions dissolve into their ions when dissolved in water.
Weak acids and bases don't fully dissociate in water.
If you are given 720.00 Grams of Oxygen how many moles of Oxygen will you have?
Answer:
720 divided by 2 answer is 556 so answer per is 3.32.3
Explanation:
Help please thank you
Answer:
B I think I am pretty sure