For a volume of 27,000 L to a pressure of 0.82 atm at 25 °C, the amount of N2 is required is mathematically given as
n=1.1*10^{-3}mole
What amount of N2 is required to fill a small room with a volume of 27,000 L to a pressure of 0.82 atm at 25 °C?Generally, the equation for the ideal gas is mathematically given as
PV=nRT
Therefore
[tex]n=\frac{PV}{RT}\\\\n=\frac{0.980*2700}{0.0821*298}[/tex]
n=1.1*10^{-3}mole
In conclusion, the amount of N2 is required is
n=1.1*10^{-3}mole
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(40) If a hypothesis is proven correct, a theory is formulated.
True or false
Answer:
In scientific reasoning, a hypothesis is constructed before any applicable research has been done. A theory, on the other hand, is supported by evidence: it's a principle formed as an attempt to explain things that have already been substantiated by data.
Explanation:
what are two basic properties of the gas phase
Answer:
It has no definite shape or volume.
Which of the following formulas should be classified as an acid?
O Na₂SO4
O NaHCO3
O NaOH
O H₂SO4
Answer:
D) H₂SO4 is an acid
Explanation:
Please mark branliest
H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid. Therefore, the correct option is option D.
What is an acid?Any substance that tastes acidic when dissolved in water, alters the colour of some indicators, reacts with the some metals to release hydrogen, reacts using bases to produce salts, and stimulates some chemical reactions is considered to be an acid. The inorganic chemicals referred to as being mineral acids sulfuric, nitrous, hydrochloric, or phosphoric acids are examples of acids.
The phenolic, sulfonic, and carboxylic acid groups of organic molecules. These chemicals contain one or maybe more hydrogen atoms, which are discharged into highly charged hydrogen ions when they are in solution. H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid.
Therefore, the correct option is option D.
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Increasing the amplitude means you are increasing what of a wave?
Chromium (lII) sulphate reacts with potassium carbonate to form chromium (III) carbonate and potassium
sulphate.
Skeleton equation:
Answer:
Cr2(SO4)3+K2CO3---------------->Cr2(CO3)3+K2SO4
BALANCING
Cr2(SO4)3+3K2CO3------------------------->Cr2(CO3)+3K2SO4
Explanation:
Why is most space exploration
accomplished with spacecraft that do not have
crews on board?
Answer:
why is most space exploration accomplished with spacecraft that do not have crews on board? humans face many challenges in space. what is one advantage of using an orbiter to study objects in space? can be used for long periods of time.
Which two organisms are most likely to be competitors?
chipmunk, cow
snake, hawk
snake, badger
chipmunk, badger
5
Julia made a model of a cell in a clear plastic zipper bag. She used a marble for the nucleus and pinto beans for mitochondria.
Which of the following options would be best for making her model more like a plant cell?
A. Take the marble out of the bag.
B. Put the bag inside a clear plastic box.
c. Take the pinto beans out of the bag.
D. Put the bag inside a larger clear plastic bag.
Reset
Submit
The option that would be best for making Julia model look more like a plant cell is putting the bag inside a larger clear plastic bag.
What is a cell?A cell is the basic and functional unit of life. Every living organism is made up of one or more cells.
However, a plant cell is morphologically different from an animal cell. One of the major differences is that a plant cell posseses a cell wall that protects the cell.
According to this question, Julia made a model of a cell in a clear plastic zipper bag. She used a marble for the nucleus and pinto beans for mitochondria.
Therefore, the option that would be best for making Julia model look more like a plant cell is putting the bag inside a larger clear plastic bag which will represent the cell wall.
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HELP PLS WILL GIVE BRAINLIEST AND THANKS
In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 and reacts. The reaction is described by the following balanced chemical equation.
2Al + 3Cl2 ==> 2AlCl3
a)Identify the limiting reagent for the reaction.
b)Calculate the number of moles or products formed
Answer:
you have school on Sunday?
explain any four effects caused due to exercise use chemical of chemical feritilizer on environment
Excessive use of chemical fertilizers has led to several issues such as serious soil degradation, nitrogen leaching, soil compaction, reduction in soil organic matter, and loss of soil carbon.
Hope it helps :)
What is due to acids formed when atmospheric and volcanic gases mix with water. question 2 options: chemical weathering mechanical weathering root-pry pedalfer
Chemical weathering formed is due to acids formation when atmospheric and volcanic gases mix with water.
What is chemical weathering?Chemical weathering is a type of weathering that involved weakening and disintegration of rock by chemical reactions like acid reactions and so on. These reactions include oxidation, hydrolysis, and carbonation. These processes lead to formatiom or destruction of minerals, thus changing the nature of the rock's mineral composition.
Therefore, Chemical weathering is due to acids formed when atmospheric and volcanic gases mix with water.
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Distinguish between single and double replacement reactions and give an example of
each.
Answer:
i think this is right!
Explanation:
An example of a single replacement reaction occurs when potassium (K) reacts with water (H2O). A colorless solid compound named potassium hydroxide (KOH) forms, and hydrogen gas (H2) is set free. The equation for the reaction is: 2K + 2H2O → 2KOH + H.
An example of a double replacement reaction is the reaction between silver nitrate and sodium chloride in water. Both silver nitrate and sodium chloride are ionic compounds. Both reactants dissolve into their ions in aqueous solution.
_____is the force created when an object is physically pushed or pulled. *
1 point
A. applied force
B. friction
C. gravity
D. magnetism
Answer:
applied force .....I'm pretty sure
Answer:
A. Applied forces aka Contact forces
Explanation:
Thos force is created when you apply forces to an object as in a push/pull or other physical ways.
I hope it helps! Have a great day!
Anygays-
(Science)
(Quarter 4)
Solve the puzzle game's to have 5 point's
(BEGIN)
( •O•)!?
| |
| |
| |______|________
|________|_____ |
| |
(FINISH)
(real question)
can you know why Sam is nosebleeding
_ ~
(> ㅍuㅍ)>
Explanation:
because of blood pressure
Pumice is a volcanic rock that contains many trapped air bubbles. A 225- gram sample is occupied 236.6ml.
a. What is the density of pumice (answer is 0.951g/ml)
density of the pumice.
solution:density= mass/ volume (d= m/v)
= 225/236.6
= 0.951g/ml
so, the density of pumice is 0.951g/ml.
[tex]{\boxed{{ formula :}}} [/tex]
[tex] →\bold{Density = \frac{mass}{volume} }[/tex]
[tex]{\boxed{{ Given :}}} [/tex]
[tex]→\bold{Mass = 225 g }[/tex]
[tex]→\bold{ Volume = 236.6 ml}[/tex]
[tex]{\boxed{{ Solution :}}} [/tex]
[tex]→\bold{Density = \frac{mass}{volume} }[/tex]
[tex]→\bold{ Density = \cancel{ \frac{225 g}{236.6 ml}} = 0.951 g/ml}[/tex]
The density of pumice is 0.951 g/ ml .
If I have 21 moles of gas held at a pressure of 78 atm and a temperature of 901 K, what is the volume of the gas?
n this questions certain
a
r
e
g
i
v
e
n
,
of moles ,n = 21 mol, Pressure P = 78 atm, Temperature T = 900 K, Volume V = ?
We have to calculate the volume of the given moles of gas at specific temperature and pressure.
Using Ideal Gas equation;
PV = nRT
V = nRT /P ( R = gas constant = 0.08206 L atm
m
o
l
−
1
K
−
1
)
V= 21 mol x 0.08206 L atm
m
o
l
−
1
K
−
1
x 900K / 78 atm
V= 73.854 L atm / 78 atm = 0.946 L
Predict the species that will be reduced first if a mixture of molten salts containing the following ions undergoes electrolysis:
Zn2+, Mn2+, Na+, Al3+, Li+
Hint! You may need to consult the table of Standard Reduction Potential on the data sheet.
Answer: Zn2+
Explanation:
The standard reduction potential of the given species is as follows:-
[tex]\begin{aligned}&Z_{(aq)}^{2+}+2 e^{-} \longrightarrow {Zn}(\mathrm{s}) \quad E^{\circ}=-0.76 \mathrm{~V}\\&\mathrm{Mn}_{(\text {aq) }}^{2+}+2 e^{-} \longrightarrow \mathrm{Mn}(\mathrm{s}) \quad E^{\circ} = -1.03 \mathrm{~V}\\&\mathrm{Na}^{+}_{(\text {aq) }} + e^{-} \longrightarrow \mathrm{Na}\text{(s)} \quad E^{\circ}=-2.71 \mathrm{~V}\end{aligned}[/tex]
[tex]\begin{aligned}&\mathrm{Al}_{(\text {aq) }}^{3+}+3 e^{-} \longrightarrow \text {Al}\text{(s)}\quad E^{0}=-1.66 \mathrm{~V}\\&\mathrm{Li}^{+}(aq)+{e}^{-} \longrightarrow \mathrm{Li}\text{(s)} \quad E^{0}=-3.05 \mathrm{~V}\end{aligned}[/tex]
In the electrochemical series, the species having the lowest electromotive force—the lowest negative value—will be reduced first and the species having the highest negative value will be reduced last
Therefore, Zn2+ will be reduced first and Li+ will be reduced last
The reduction has been defined as the loss of electrons. The species of molten salt that reduces first has been zinc ion in electrolysis.
What is electrolysis?The electrolysis has been defined as the process of the ionization of the salt under the influence of the electric field.
The species with the lowest reduction potential will reduce first. The reduction potential of the following is:
Zinc ion = -0.76 VManganese ion = -1.03 VSodium ion = -2.71 VAluminum ion = -1.66 VLithium-ion = -3.05 VZinc has the lowest reduction potential and thus is the reduced first among the others.
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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.complete and balance the following equation b. Br2 + Nacl
how many moles of o2 would be required to produce 4 mol h2o?
Hii there !
The reaction accompanying production of water in this case would be -
[tex]\green{ \underline { \boxed{ \sf{2H_2+O_2\longrightarrow 2H_2O}}}} [/tex]
Thus ,by observing the reaction, we can conclude that 2 mole of Hydrogen [tex](H_2 )[/tex]react with 1 mole of oxygen[tex](O_2)[/tex]to produce 2 mole of water [tex](H_2O)[/tex]
Now,
To produce 1 moles of water.
Moles of Oxygen[tex](O_2)[/tex] required [tex] = \frac{1}{2}[/tex] moles
Similarly,
To produce 4 moles of water.
[tex]\implies[/tex] Moles of Oxygen[tex](O_2)[/tex] required = [tex]\frac{1}{2}\times 4[/tex] moles
[tex]\implies[/tex] 2 moles
Hope it helps.
giving brainliest please help!
Answer:
I am sure it is the reaction will shift right towards the
product
What is the concentration in ppm of sodium fluoride in tap water that has been fluoridated by the addition of 32 mg of naf for every 20 kg of solution?.
ppm = mg/l = mg/kg
32 mg / 20 kg = 1.6 ppm
The concentration in ppm of sodium fluoride in tap water is 1.6 ppm.
What is ppm concentration?
ppm is an abbreviation for parts per million. It can also be expressed as milligrams per liter of a solution.It is a measurement which is equal to mass of a substance per unit volume .
One ppm is equivalent to the absolute fractional amount which is multiplied by a million . It is a best way to describe smaller concentrations in a mixture such as that of gases,liquids or solids . It is a ratio of two quantities which have the same unit. In its full form ppm is expressed as one in a million part.
Depending on the substance being measured 1 ppm is expressed in many different ways, out of which preferred ways are microliters per liter , milligrams per liter and micrograms per liter.
For the given problem, concentration in ppm is found out as, since ppm is miiligrams per liter the concentration is found out as follows:32 mg/20 kg (since kilograms and liters are equivalent) =1.6 ppm
Thus, the final concentration of sodium fluoride in tap water which is fluorinated is 1.6 ppm.
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While on the scene of a very large explosion, you realize that you and your colleagues require additional wire mesh screens to collect evidence. What are you most likely sifting through?
A. Liquid found at the crime scene
B. Debris found at the crime scene
C. Dirt from footprints found at the crime scene
D. Vapors from the explosion
The individual is most likely sifting through the debris which is found at the crime scene.
What is Debris?This is defined as the scattered remains of something which has been broken down as a result of incidents such as an explosion.
The wire mesh is used as it helps to remove long fibers present at the crime scene which is taken for investigation.
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What type of galaxy is most common?
Elliptical
Irregular
Lens
Spiral
Imagine that you are a leaf on a plant, and you realize that you are running low on supplies to do your job. You decide to text the roots to set up a delivery. Write a text message conversation between the leaf and the roots that discusses and arranges this delivery.
Be sure to answer these questions in your conversation:
• Which supplies is the leaf running out of? • What are the supplies needed to do? • How will the roots get the supplies from outside the plant? • How will the supplies get from the roots to the leaf?
The leaves of plants primarily serve to photosynthesize and require water conducted by the root to do so.
Water conduction by the rootAs a leaf of a plant running low on supplies that the root is responsible for, what I will be needing is water.
Thus, I will have to send a text message to the root to supply me with water. The root will respond by asking its foot soldiers (the root hairs) to conduct water into the root.
Once water gets into the root, it enters special cells that are responsible for conducting water inside plants - the xylems. The root sends the water through the xylem and water travels from there to me - the leaf.
Once the water gets to me, I will use it in combination with inorganic carbon (carbon dioxide) to synthesize carbohydrates.
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Question 1 (8 points)
Name the following simple binary compounds.
1. NaBr =
2. KCl =
3. Mgo =
4. CaF2=
5. BaS =
6. Li20 =
7. NaF =
8. CS3N =
Answer:
Below
Explanation:
1. Sodium Bromide
2. Potassium Chloride
3. Magnesium Oxide
4. Calcium Fluoride
5. Barium Sulfide
6. Lithium Oxide
7. Sodium Fluoride
8. Cesium Nitride
Consider these equations:
2S (s) + 3O2 (g)→2SO3 (g), ΔH = −792 kJ
2S (s) + 2O2 (g)→2SO2 (g), ΔH = −594 kJ
2SO2 (g) + O2 (g)→2SO3 (g), ΔH =?
What is the missing ΔH?
a. −294 kJ
b. −198 kJ
c. +198 kJ
d. +294 kJ
Answer: (B) −198 kJ.
HELPPPPP
A sample of gas contains 6 mol in a 22 L flask at 238 K. What is the pressure of the gas in atmospheres?
The pressure of the sample of gas with the given mol, volume and temperature is 5.33atm.
Ideal Gas LawThe Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "pressure P times volume V is equal to moles times temperature and the universal gas constant. It is expressed;
PV = nRT
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK ).
Given the data in the question;
Amount of gas n = 6molVolume V = 22LTemperature T = 238KPressure P = ?We substitute our values into the expression above to determine the pressure of the gas in atmospheres.
PV = nRT
P = nRT / V
P = ( 6mol × 0.08206Latm/molK × 238K ) / 22L
P = 117.18168Latm / 22L
P = 5.33atm
Therefore, the pressure of the sample of gas with the given mol, volume and temperature is 5.33atm.
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3.0 Liters of gas at a pressure of 0.90 atm is compressed to 2.0 atm.
What is the new volume?
Answer:
5.5 L
Explanation:
What component of the human epidermis functions to make the skin's surface extremely tough and resistant to bacterial enzymes?
keratin
proteases
dermis
hypodermis
Answer:
Keratin :)
Explanation:
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