Answer:
B
Explanation:
Oil > Animals > Plants > Chemicals
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.
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
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
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
Which element will form an ionic bond with chlorine (Cl): bromine (Br) or magnesium (Mg)
Answer:
The answer is Magnesium
An ore is a combination of a metal and another element. TRUE OR FALSE
Answer:
Explanation:
ℎ ℎ
Cuáles son el pHy PoH de una solución cuya concentración de iones hidronio [H+]es de 0.000475 M de acido sulfurico?
HEELPPP!!!
What is the charge of the nucleus?
a) negative
b) positive
c) neutral
Answer:positive
Explanation:
Answer:
Positive.
Explanation:
Since a neutral charge won't cancel out a positive charge, the overall charge of a nucleus is positive.
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.
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.
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45.89 g of Hydrogen atoms contains how many moles of Hydrogen
atoms?
Please show work it’s due in 5 minutes I’ll give brainliest
2.63 g
Explanation:
One way to approach this problem is to determine the percent composition of hydrogen in water.
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
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)
Please help me guys.
Please Help. Thank You!
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!
WILL GIVE BRAINLESS IF ALL ANSWER ARE CORRECT
Which of these is not a limiting factor for a population of squirrels?
a
Available space to build nests
b
Available water sources
c
Available friends to play
d
Available food to eat
Question 2 (4 points)
A decrease in limiting factors leads to an increase of biodiversity.
True
False
Question 3 (4 points)
If a disease destroying soybean plants in a field completely sweeps through an ecosystem, what would happen to the population of
songbirds that rely on the soybeans for food?
a
The songbird population would decrease
b
The songbird population will remain constant
c
The songbird population will increase rapidly
d
The songbirds will all crumple to the ground instantaneously
Question 4 (4 points)
Which of these limiting factors from the lesson is abiotic?
a
Predators
b
Food
c
Weather
d
Diseases
Question 5 (4 points)
Which of the following was given in the lesson as a limiting factor for organisms in the Caribbean Sea?
a
Amount of rainfall
b
Nesting locations
c
Water Temperatures
d
A lack of space within the mangrove swamps
Question 6 (5 points)
Are limiting factors positive, negative, or both for an ecosystem? Explain your reasoning
Question 7 (4 points)
When a population grows past the ecosystem's carrying capacity, what happens to the population?
a)It continues to grow
b)the population starts to die off to return to carrying capacity
c)The population will go extinct due to lack of resources
d)The population grows, then finds a new carrying capacity
Question 9 (4 points)
Will competition increase or decrease the carrying capacity of an ecosystem for the animals in competition?
increase
Decrease
Question 10 (4 points)
The largest number of individuals in a species that an environment can support long term...
a)Immigration
b)population Density
c)Emigration
d)Carrying Capacity
Answer:
See explanation
Explanation:
1) C
2) True
3) A
4) C
5) A
6) Both. Some species that rely on the limiting factors will be harmed and other species that are prey to those species relying on limiting factors will be benefited.
7) B
9) Decrease
10) D
FREE BRAINLIST NEED HELP ASAP
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?
________________________
(GIVING BRAINLIEST)
....
Answer:
C
Explanation:
Because a planet is a celestial body distinguished from the fixed stars by having an apparent motion of its own (including the moon and sun), especially with reference to its supposed influence on people and events.
Answer:
it is the second one ;)
Explanation:
Earth
Moon
SUN
Based on the diagram above, what moon phase would most likely be occurring?
does anyone have the gizmo cell types answer key for activity d?
Answer:
im sorry i dont
Explanation:
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:
When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a___________ Mixture.
When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
What is precipitation reaction?Chemical reactions known as precipitation reactions take place in aqueous solutions to produce precipitates. Moreover, chemical changes that occur inside the substances are a part of chemical processes.
Moreover, chemical reactions take place between two or even more chemical substances, known as reactants. As a result, the reactants might be solid, gaseous, or liquid in nature. When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
Therefore, when a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
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_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 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!!!
what type of solid is H20 (ice)?
Answer:
Ice is a molecular and crystalline solid.
Explanation:
Water freezes at 0 degrees Celsius; it has strong molecular bonds between the hydrogen and oxygen atoms of each molecule, and weaker intermolecular bonds between each molecule of water. The polarity of the molecules helps align them into an organized, repeating patterned, crystalline structure when a solid.
WILD GUESS
OUT OF BAKUGOU SHOTO AND DEKU
GUESS WITCH ONE I SIMP FOR
Answer: all of them?
Explanation:
Answer:
Deku.
Explanation:
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