Answer: c
Explanation : because it make sense the most (srry if im wrong!)
Answer: It is the amount of moisture in the air.
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:
When 149 grams of potassium chloride are decomposed, 78 grams of potassium and an amount of chlorine are released. in what mass ratio are potassium and chlorine released?
Answer:
78 : 71
Explanation:
From the question given above, the following data were obtained:
Mass of KCl = 149 g
Mass of K = 78 g
Mass ratio of K and Cl =?
Next, we shall determine the mass of Cl in the compound. This can be obtained as follow:
Mass of KCl = 149 g
Mass of K = 78 g
Mass of Cl =?
Mass of Cl = (Mass of KCl) – (Mass of K)
Mass of Cl = 149 – 78
Mass of Cl = 71 g
Finally, we shall determine the mass ratio of K and Cl. This can be obtained as follow:
Mass of K = 78 g
Mass of Cl = 71 g
Mass ratio of K and Cl =?
Mass ratio = mass of K / mass of Cl
Mass ratio = 78 / 71
Therefore, potassium, K and chlorine, Cl are released in mass ratio of 78 : 71
What do producers, consumers, and decomposers all have in common?
A. They only exist on land.
B. They are all the same type of organism.
C. They only live in ecosystems with warm temperatures.
D. They rely on abiotic components of ecosystems to live.
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.
Can someone explain to me the meaning of reaction rate and rate constant :)
Answer:
Reaction Rate is the reaction rate or reaction is the speed at which chemical reaction takes place.
Rate constant is the chemical kinetics a reaction rate constant or reaction rate
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:
Consider the following reaction:
Mg(s) + 2 HCl (aq) → H2(g) + MgCl2(aq)
If 3.65 mol of magnesium and 3.65 mol of hydrochloric acid are reacted, how many
moles of hydrogen gas are produced?
Answer: 1.825 moles of hydrogen gas are produced.
Explanation:
The balanced chemical equation is:
[tex]Mg(s)+2HCl(aq)\rightarrow H_2(g)+MgCl_2(aq)[/tex]
According to stoichiometry :
2 moles of [tex]HCl[/tex] require = 1 mole of [tex]Mg[/tex]
Thus 3.65 moles of [tex]HCl[/tex] will require=[tex]\frac{1}{2}\times 3.65=1.825moles[/tex] of [tex]Mg[/tex]
Thus [tex]HCl[/tex] is the limiting reagent as it limits the formation of product and [tex]Mg[/tex] is the excess reagent.
As 2 moles of [tex]HCl[/tex] give = 1 mole of [tex]H_2[/tex]
Thus 3.65 moles of [tex]HCl[/tex] give =[tex]\frac{1}{2}\times 3.65=1.825moles[/tex] of [tex]H_2[/tex]
Thus 1.825 moles of hydrogen gas are produced.
Explain , in terms of electrons, why the bonding in strontium sulfide , SrS , is similar to the bonding in magnesium bromide, MgBr 2,
Explanation:
The bonding in Magnesium Bromide is ionic bonding. Ionic bonding occurs between metals and non metals, due to the transfer of electrons.
Strontium Sulphide is also an ionic compound. The metal is Strontium and the non metal is sulphur.
In terms of electrons, it is similar to Magnesium bromide in the sense that the metal lost two electrons and the non metal gained two electrons which is the same as in Magnesium Bromide.
1. Calculate the quantity of glucose needed to prepare (a) 250 mL of a 100 mM of
solution (in water), (b) 100 mL of 0.05% solution and (c) 500 mL of 50 mg/mL.
[Formula: C6H12O6 Melting point: 146°C, IUPAC ID: D-glucose, Density:
1.56 g/cm, Molar mass: 180.156 g/mol).
Answer:
a. mass of glucose required = 4.50 g
b. mass of glucose required = 0.05 g
c. mass of glucose required = 25g
Explanation:
1a. molar mass of glucose = 180.156 g/mol
volume of solution = 250 mL or 250 mL * 1 L/1000 mL = 0.25 L
concentration of solution = 100 mM or 100mM * 1 M/1000 mM = 0.10 M
amount in moles = mass/ molar mass = concentration * volume
mass in grams = concentration * volume * molar mass
mass = 0.10 * 0.25 * 180.156
mass of glucose required = 4.50 g
b. mass concentration of 0.05 % solution = 0.05 g/100 ml = 0.5 g/L
volume of solution = 100 mL = 0.1 L
mass in grams = mass concentration * volume
mass in grams = 0.5 g/L * 0.1 L
mass of glucose required = 0.05 g
c. mass concentration of solution = 50 mg/ mL = 0.05 g/ 0.001 L = 50 g/L
volume of solution = 500 mL = 0.5 L
mass of solute required = concentration * volume
mass required = 50 g/L * 0.5 L
mass of glucose required = 25g
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.
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
Ammonia reacts with oxygen according to the reaction
4NH3(g) + 5O2(g) + 4NO(g) + 6H2O(g), AHrx = -906 kJ
Calculate the heat associated with the complete reaction of 155 g of NH3 .
Express the artswer in kilojoules to three significant figures.
Se
ΑΣΦ
?
kJ
her
9.pdf
Submit
Request Answer
Part B
Answer:
-2070 kJ
Explanation:
How much potassium nitrate could be dissolved into 2L of water
Answer:
About 110 g.
Your tool of choice here will be the solubility graph for potassium nitrate, KNO3, in water.
Answer:
613
Explanation:
search up that question at coursehero.com...these questions were originally made there, with the answers
Carbon can be used to displace some metals from their ores. Explain the process by which iron is displaced from its ore by carbon in a blast furnace. Include the reaction equation. *
Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as hematite contain iron(III) oxide, Fe2O3. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.
Carbon is more reactive than iron, so it can displace iron from iron(III) oxide. Here are the equations for the reaction.
Step 1 – Hot air (oxygen) reacts with the coke (carbon) to produce carbon dioxide and heat energy to heat up the furnace.
C(s) + O2(g) → CO2(g)
Step 2 – More coke is added to the furnace and reduces the carbon dioxide into carbon monoxide, a good reducing agent.
CO2(g) + C(s) → 2CO(g)
Step 3 – iron(III) oxide is reduced.
iron(III) oxide + carbon → iron + carbon dioxide
2Fe2O3(s) + 3C(s) → 4Fe(l) + 3CO2(g)
In this reaction, the iron(III) oxide is reduced to iron, and the carbon is oxidized to carbon dioxide.
In the blast furnace, it is so hot that carbon monoxide can be used, in place of carbon, to reduce the iron(III) oxide:
iron(III) oxide + carbon monoxide → iron + carbon dioxide
Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)
More than you asked
Facilitated diffusion moves large molecules through ________.
The diffusion of solutes through transport proteins in the plasma membrane is referred to as facilitated diffusion. Passive transport is a subset of facilitated diffusion. Facilitated diffusion is still passive transport even though it uses transport proteins.
In contrast to passive diffusion, assisted diffusion does not result in the carried molecules dissolving in the phospholipid bilayer. Proteins instead allow the delivered molecules to pass through the membrane without coming into contact with its hydrophobic interior.
Materials move across the plasma membrane with the aid of membrane proteins during facilitated transport, also known as facilitated diffusion.
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a sample of gaseous water is composed of 2.34 moles. What is the samples volume at STP ?
Answer:
The sample's volume at STP is 52.416 L.
Explanation:
The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
Then you can apply the following rule of three: if 1 mole of a gaseous sample occupies 22.4 L, 2.34 moles how much volume does it occupy?
[tex]Volume=\frac{2.34 moles* 22.4 L}{1 mole}[/tex]
Volume= 52.416 L
The sample's volume at STP is 52.416 L.
Is this true or false?
false
true
Answer:
True
Explanation:
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!!
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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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.
Answer:
d. supersaturated.
Explanation:
A solution naturally contains a solute and a solvent. The solute is the solid substance that dissolves in the solvent, which is usually a liquid substance. A solution has a maximum amount of solute that can dissolve in its constituent solvent.
However, when 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 SUPERSATURATED. This means that the solution contains more than the maximum amount of solute.
Which statement is most correct?
A. Electric currents and magnets each exert a force.
B. Electric currents exert a force but magnets do not.
C. Neither an electric current nor a magnet exert a force.
D. Electric currents do not exert a force but magnets do exert a force.
Answer: A
Explanation:
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
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.
Engineers Julie and Walter operate a reactor where two unbalanced, gas phase reactions occur: CH3COOH+H2→C2H5OH+H2O and C2H5OH→(C2H5)2O+H2O. In the first reaction, acetic acid (CH3COOH) and hydrogen (H2) react to produce ethanol (C2H5OH) and water (H2O); and ethanol decomposes to diethyl ether ((C2H5)2O) and water in the second reaction. A stream of 67.8 mol/s hydrogen and the balance acetic acid at 147°C is fed to the reactor, which operates at steady state. The stream exiting the reactor contains acetic acid, hydrogen, ethanol, water, and diethyl ether at 417°C. The component flow rate of acetic acid exiting the reactor is 3.81 mol/s. The fraction conversion of acetic acid is 71.6%, and the selectivity, which is the ratio of the amount of ethanol to diethyl ether in the exiting stream, is 3.14. Assume all components are in the gas phase and no phase changes occur in the reactor.
Find the component molar flow rate of acetic acid(AA) entering the reactor.
Answer:
Explanation:
From the given information:
The two reactions occurring in the reactor are:
[tex]\mathtt{CH_3COOH + 2H_2 \to C_2H_5OH + H_2O}[/tex]
[tex]\mathtt{2C_2H_5OH \to (C_2H_5)_2O+H_2O}[/tex]
Let molar flowrate of [tex]\mathtt{CH_3COOH}[/tex] entering reactor = [tex]\mathtt{x_n}[/tex]
From the first reaction:
[tex]\mathtt{CH_3COOH + 2H_2 \to C_2H_5OH + H_2O}[/tex]
Since there is a 71.6% conversion of [tex]\mathtt{CH_3COOH}[/tex];
Then, amount of [tex]\mathtt{CH_3COOH}[/tex] remaining unreacted and exiting the reactor is:
= x - 0.716x
= 0.284x
Recall that; the component flow rate exiting the reactor = 3.81 mols
∴
0.284x = 3.81
x = 3.81/0.284
x = 13.42 moles
Thus, the molar flowrate of [tex]\mathtt{CH_3COOH}[/tex] entering the reactor is 13.42 moles
Whats the atomic number for protactinium-231
Answer:
91
Fact box
Group Actinides 1572°C, 2862°F, 1845 K
Block f 15.4
Atomic number 91 231.036
State at 20°C Solid 231Pa
Electron configuration [Rn] 5f26d17s2 7440-13-3
Explanation:
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 statement best describes why modern horses look the way they do?
Aspects of horse anatomy evolved within a few generations to suit their environment.
Aspects of horse anatomy evolved over hundreds of years to suit their environment
Aspects of horse anatomy evolved over millions of years to suit their environment.
Aspects of horse anatomy evolved within a generation to suit their environment.
Answer:
C
Explanation:
C
Aspects of horse anatomy evolved over millions of years to suit their
environment.
EvolutionEvolution refers to the various ways and forms organisms developed
throughout the years. This is usually as a result of their adaptation to
different living conditions.
Horses were believed to be similar to dogs millions of years ago according
to discovered fossils but became taller as a result of their adaptation to the
plains which they now lived in.
Read more about Horse here https://brainly.com/question/16331056
__ CaSO4 + ____AIP --> ____Ca3P2 + ____AI2(SO4)3
if a student has 7.33 moles of CaSO4 to use how many moles of AIP do they need
Answer:
4.89 mol
Explanation:
Step 1: Write the balanced equation
This is a double displacement reaction.
3 CaSO₄ + 2 AIP ⇒ Ca₃P₂ + AI₂(SO₄)₃
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of CaSO₄ to AlP is 3:2.
Step 3: Calculate the moles of AlP needed to react with 7.33 moles of CaSO₄
We will use the previously established molar ratio.
7.33 mol CaSO₄ × 2 mol AlP/3 mol CaSO₄ = 4.89 mol AlP
calcium (Ca) is in group 2 on the periodic table. what does this tell you about this element?
Answer:
its valnce electrons is 2 and the reaction to metal
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