Answer:
3.33 L
Explanation:
We can solve this problem by using the equation:
C₁V₁=C₂V₂Where the subscript 1 refers to one solution and subscript 2 to the another solution, meaning that in this case:
C₁ = 0.25 MV₁ = 100 LC₂ = 7.5 MV₂ = ?We input the data:
0.25 M * 100 L = 7.5 M * V₂V₂ = 3.33 LThus the answer is 3.33 liters.
Ammonium perchlorate NH4ClO4 is the solid rocket fuel used by the U.S. Space Shuttle. It reacts with itself to produce nitrogen gas N2, chlorine gas Cl2, oxygen gas O2, water H2O, and a great deal of energy. What mass of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate? Be sure your answer has the correct number of significant digits.
Answer: 0.99 grams of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate
Explanation:
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]\text{Number of moles of } NH_4ClO_4=\frac{3.3g}{117.5g/mol}=0.028moles[/tex]
The decomposition of ammonium perchlorate is :
[tex]2NH_4ClO_4\rightarrow Cl_2+N_2+2O_2+4H_2O[/tex]
According to stoichiometry :
2 moles of [tex]NH_4ClO_4[/tex] produce = 1 mole of [tex]Cl_2[/tex]
Thus 0.028 moles of [tex]NH_4ClO_4[/tex] produce=[tex]\frac{1}{2}\times 0.028=0.014moles[/tex] of [tex]Cl_2[/tex]
Mass of [tex]Cl_2=moles\times {\text {Molar mass}}=0.014moles\times 71g/mol=0.99g[/tex]
Thus 0.99 grams of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate
Why are ions created in an ionic bond?
Please help me guys.
How many moles are in 58.6 L of N2gas at STP?
Answer:
[tex]\boxed {\boxed {\sf 2.62 \ mol \ N_2}}[/tex]
Explanation:
The relationship between moles and gases is unique. Regardless of the type of gas, there will always be 22.4 liters of gas in 1 mole, as long as it's at STP (standard temperature and pressure).
We can make a ratio using this information.
[tex]\frac {22.4 \ L \ N_2}{ 1 \ mol \ N_2}[/tex]
Multiply by the given number of moles.
[tex]58.6 \ L \ N_2 *\frac {22.4 \ L \ N_2}{ 1 \ mol \ N_2}[/tex]
Flip the fraction so the liters of nitrogen cancel.
[tex]58.6 \ L \ N_2 *\frac {1 \ mol \ N_2}{ 22.4 \ L \ N_2}[/tex]
[tex]58.6 *\frac {1 \ mol \ N_2}{ 22.4 }[/tex]
[tex]\frac {58.6 \ mol \ N_2}{ 22.4 }= 2.61607143 \ mol \ N_2[/tex]
The original measurement of liters has 3 significant figures, so our answer must have the same.
For the number of moles calculated, 3 sig figs is the hundredth place. The 6 in the thousandth place tells us to round the 1 to a 2.
[tex]2.62 \ mol \ N_2[/tex]
58.6 liters of N₂ gas at STP is equal to about 2.62 moles.
True or false: Sometimes older rocks end up on top of younger rocks.
Answer:
true
downstream to the riverbed. However, the most common mechanism to produce older rocks on top of younger is by thrust faulting. Thrust faults form where rocks are being compressed, usually by plate tectonic mechanisms. Thrust faults rip up older strata and pile it on top of younger rocks.
Explanation:
2. Describe two ways in which you could decide when an
acid has been completely neutralised by an insoluble
carbonate.
Answer:
search in chrome u will get your answer
Explanation:
A student investigates a pure metal, X . The student takes a 100.0 g piece of metal X , heats it to 500.0°C , then places it on a 1000.0 g block of ice at 0.0°C . The ice partially melts, and the final temperature of the metal, ice, and melted water is 0.0°C . The student calculates the experimental value of the specific heat capacity of metal X and records it as 0.24 J/(g⋅°C) . Calculate the magnitude of the energy change (qmetal) of metal X during the experiment.
Answer:
q_metal = -12000 J = -12 KJ
Here, the negative sign indicates that the energy is lost by the metal piece.
Explanation:
The magnitude of energy change of the metal X can be given by the following formula:
[tex]q_{metal} = mC\Delta T[/tex]
where,
m = mass of metal = 100 g
C = Specific Heat Capacity of metal X = 0.24 J/g.°C
ΔT = Change in Temperature of Metal Piece = 0° C - 500°C = -500°C
Therefore, using these values in the equation, we get:
[tex]q_{metal} = (100\ g)(0.24\ J/g^oC)(-500^oC)\\[/tex]
q_metal = -12000 J = -12 KJ
Here, the negative sign indicates that the energy is lost by the metal piece.
How does a hydroelectric power plant convert energy?
A. As water flows through the channels toward the turbines, it has kinetic energy. This is changed to mechanical energy as the water turns the turbines. Then the mechanical energy of the turbines is changed to electrical energy by the generator.
B. As water flows through the channels toward the transformer, it has potential energy. This is converted to electrical energy by the transformer, and then the energy is magnified by the generator.
C. As water flows through the channels toward the generator, it has potential energy. This is changed to electric energy as the generator rotates. Some of the electric energy is used to change water's energy into kinetic energy.
D. As water flows through the channels toward the turbine, it has kinetic energy. This is changed to potential energy within the turbine. This potential energy is converted to electrical energy by the transformer.
PLS HELP I WILL GIVE BRAINLYIST!!!
PLZZZ HELP BRAINILEST (science)
Answer:
i cannot see the question due to the flash you used
Explanation:
The volume of a gas is 400 mL when the pressure is 1 atm. At the same temperature, what is the pressure at which the volume of the gas is 2 L
Answer:
the pressure is equal to 0.2atm
The pressure at which the volume of the gas is 2 L at the same temperature as when the volume of a gas is 400 mL and pressure 1 atm is 0.2 atm.
What is the combined Gas Law?According to combined gas law,
[tex]\rm \dfrac{PV}{nT} = R[/tex]
In the Combined Gas Law,if we change either one of the variables the others will also change.
When the moles of the gas is constant , the above equation can be written as ,
[tex]\rm \dfrac{P'V'}{T'} = \dfrac{PV}{T}[/tex]
Given is P = 1 atm , V= 400ml , V'= 2L= 2000ml , P'= ? T=T'
So we will substitute the values in the above formula keeping temperature constant.
[tex]\rm P'V' = PV\\\\\rm P' \times 2000 = 1 \times 400\\ \\\m P'= \dfrac{1\times 400}{2000} = 0.2 \; atm\\\\\rm P' = 0.2 \; atm\\[/tex]
Therefore the pressure at which the volume of the gas is 2 L at the same temperature as when the volume of a gas is 400 mL and pressure is 1 atm is 0.2 atm.
To know more about Combined Gas Law:
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Cuáles son el pHy PoH de una solución cuya concentración de iones hidronio [H+]es de 0.000475 M de acido sulfurico?
WILD GUESS
OUT OF BAKUGOU SHOTO AND DEKU
GUESS WITCH ONE I SIMP FOR
Answer: all of them?
Explanation:
Answer:
Deku.
Explanation:
Using the reaction C12H22O11 + 12 O2 ->12CO2 + 11H2O (e). How many grams of carbon dioxide can be produced from 456.7g sucrose
Answer:
704.6 g CO2
Explanation:
MM sucrose = 342.3 g/mol
MM CO2 = 44.01 g/mol
g CO2 = 456.7 g sucrose x (1 mol sucrose/MM sucrose) x (12 moles CO2/1 mol sucrose) x (MM CO2/1mol CO2) = 704.6 g CO2
_Na2B407 + _H2SO4(aq) +
H2SO4(aq) + -_H200 → __H3BO3(s) + __Na2SO4(aq)
Balance the Equation
Answer:
Na2B4O7 + H2SO4 + 5H2O → 4H3BO3 + Na2SO4
Explanation:
The unbalanced equation is given as;
Na2B4O7 + H2SO4(aq) + H2O → H3BO3(s) + Na2SO4(aq)
Balancing the equation of the reaction involves making sure the number of moles of elements in the reactants to be equal to the number of moles of the element of the products.
The balanced equation is given as;
Na2B4O7 + H2SO4 + 5H2O → 4H3BO3 + Na2SO4
how does the compound NaOH contain ionic and covalent bonds?
Answer:
Explanation:
OH forms a covalent bond. However, OH itself is negatively charged. Therefore, it can form ionic attractions to the positively charged sodium (Na+) ions.
Which statement is correct about the law of conservation of energy?
Energy is created when water freezes.
Energy is destroyed when sugar is burned.
Energy stays inside molecules permanently.
Energy is transferred when atoms are rearranged.
Answer:
Energy is transferred when atoms are rearranged
Explanation:
Breaking bonds between atoms need energy. When new bonds are formed, energy is released
The law of conservation of energy is energy isn't created or destroyed
A and B are wrong because there is creation or destruction of energy
C is wrong because energy can be transferred (think touching a hot stove with your finger. heat is transferred from the stove to your finger OUCH!)
D is correct because the energy is still there, but in a different form
(16m)(x)=(0.10)(1.5l)
Answer:
0.192 M NaOH
Explanation:
light behaves as a longitudinal wave
Answer:
No, light behaves as a Transverse Wave. All electromagnetic waves behave as transverse waves.
does anyone have the gizmo cell types answer key for activity d?
Answer:
im sorry i dont
Explanation:
Which element will form an ionic bond with chlorine (Cl): bromine (Br) or magnesium (Mg)
Answer:
The answer is Magnesium
An 8.5 g. Of ethanol (C2H5OH) placed in a constant volume calorimeter and the temperature rose to 3.2°C. Find the heat of reaction of the ethanol (MM =46.1 g/mol) in kJ/mol. The heat capacity of the calorimeter plus water is read as 6.38 J/°C
Answer:
[tex]\Delta H_{rxn}=-0.111 \frac{kJ}{mol}[/tex]
Explanation:
Hello!
In this case, since the total heat flow due to the reaction equals the negative of the calorimeter's heat, we can first compute the former as shown below:
[tex]Q_{rxn}=-C\Delta T\\\\Q_{rxn}=6.38\frac{J}{\°C}*3.2\°C=-20.416J[/tex]
Now, since this total heat flow due to the reaction is defined in terms of the heat of reaction and the total reacted moles:
[tex]Q_{rxn}=n*\Delta H_{rxn}[/tex]
Thus, we compute the moles in 8.5 g of ethanol:
[tex]n=8.5g*\frac{1mol}{46.08g}=0.185mol[/tex]
Therefore, the heat of reaction results:
[tex]\Delta H_{rxn}=\frac{Q_{rxn}}{n} =\frac{-20.416J}{0.185mol} =-110.7J/mol\\\\\Delta H_{rxn}=-0.111 \frac{kJ}{mol}[/tex]
Best regards!
FREE BRAINLIST NEED HELP ASAP
i really need help:/ my friend is helping and nobody understands it
Answer:
A= Compound
B= Mixture
C= Element
D= Element
Explanation:
A has two different types of atoms chemically together as a compound
B is made up of two or more different atoms not chemically joined together
C has one type of atom
D has one type of molecule. They're the same and could be a diatomic element like hydrogen
Sorry if this is confusing or wrong
why do scientist think the earths core have iron in it .
helpppppp plssssssss does anyone know this ? what type of structure is shown in the diagram?
Answer:
the structure of atom which discovered by Thomson the describe on how the sub-atomic particles are arranged in an atom
A student runs 100 meters in 16 seconds. What is the speed of the student?
Answer:
6.25m/s
Explanation:
speed = distance/time
speed = 100/16 = 6.25m/s
Please Help. Thank You!
Is this balanced ?2 Fe(NO3)3 + 3 MgSO4 → 3 Mg(NO3)2 + 2 Fez(SO4)3
it shoudl be : 2Fe(NO3)3 + 3MgSO4 → 3Mg(NO3)2 + Fe2(SO4)3
(the difference is Fe2(SO4)3 has no coefficient)
The teacher asked the students to design an experiment that would demonstrate that temperature will affect the pressure of a gas. Which of the
following would be a valid experiment that shows the correct relationship between gas temperature and pressure?
The correct option is option A. when the students check the air pressure of bicycle tires, once by keeping it out in the winter and noticing the air pressure being decreased and after by keeping the bicycle inside at room temperature and noticing that the air pressure has increased.
How are pressure and temperature of a gas related ?
According to Gay lussac's law, the temperature and pressure of a gas are directly proportional to each other, provided the volume is constant.
When the temperature of a gas is increased, the molecules gain more kinetic energy and hence the frequency of them hitting the walls of the container increases which basically implies that the pressure increases.
On the other hand when the temperature is low, the molecules do not have substantial kinetic energy to hit the walls of the container frequently, that is the pressure decreases.
When the bicycle tires were kept out in the winter, the low temperature decreased the air pressure inside the tires. While when they were warmed at room temperature, the pressure inside the tires increased.
Therefore, the correct option is option A. when the students check the air pressure of bicycle tires, once by keeping it out in the winter and noticing the air pressure being decreased and after by keeping the bicycle inside at room temperature and noticing that the air pressure has increased.
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Who is wise president of india?
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