Answer:
103.98 kpa
Explanation:
Pv= nRT
Where
P= pressure of the system=
n= number of moles= 3 moles
T= temperature= 250 K
Volume of the container= 60 liters
R= 0.0821L.atm/K.mol
Substitute the values
Pv= nRT
P= nRT/ V
= (3×0.0821×250)/60
= 1.026 Atm
1atm= 101325 Pascal
1.026 atm= X
= 103984 pasca
Convert to kilopascal
= 103984 pasca /1000
= 103.98 kpascal
PLEASE HELP ASAP DUE SOON WILL MARK BRAINLIEST
The data showed that recently the alligator population has decreased. How could the decrease in the alligator
population affect the other populations? Be sure to explain whether the gar population, the diving duck population, a
the crab population will change, and why.
Answer:
Since the alligator population decreased, this means there are less predators for the gar. Less predators for the gar mean the gar population will increase. More gar also means more competition for the diving duck in terms of animals that eat crabs, and thus the diving duck population will also decrease.
Explanation:
Hope this helped <3
Provide one example where a neutralization reaction is undesired/harmful. State the reactants and explain why it is harmful for this reaction to take place.
Answer:
You're in my science class wth
Explanation:
For instance farmers are using basic fertilizers to neutralize an acid soil –which is harmful for the plants- while basic solutions are added in the chimneys of factories to neutralize the acid smoke that they produce –avoiding the catastrophic effects of the acid rains. Acid released in the environment from industry creates acid rain which has many ecological effects. Acid rain makes waters acidic, and causes them to absorb the aluminium that makes its way from soil into lakes and streams. This combination makes waters toxic to crayfish, clams, fish, and other aquatic animals.
Find the number of moles in:
12.044 x 10^24 atoms
Explanation:
number of moles = number of particle/ 6.02X10^23
= 12.044 X 10^24/6.02×10^23
=20.0066 moles so round it up to 3 S.F
So
=20.0moles
What are the columns on the periodic table called?
(2.5 Points)
Answer:
A group is a column of elements in the periodic table of the chemical elements.
So, the columns on the periodic table are called groups.
If this block has a mass of 173.7 grams, then what is this element??
Answer:
C
I am pretty sure that is the answer
The mass of the given cube of 173.7g and the volume of the box is 9 cm³.Then the density is 19.3 g/cm³. Therefore, the element with this density is gold. Option D is correct.
What is density?Density of a substance is the ratio of mass to its volume. Thus it tells about how much denser the substance is in the given volume. This physical quantity is dependant on mass, volume temperature and pressure.
The element have their own density corresponding to the mass and volume used. The dimensions of the given box is 3, 3 and 1. Thus volume is the product of this length, breadth and height.
Volume = 3 ×3 × 1
= 9 cm³.
Mass of the box is given 173.7 grams. Now, the density of the element is calculated as follows:
Density = 173.3 / 9 cm³
= 19.3 g/cm³.
From the table, it is clear that the this density corresponds to the element gold. Therefore, option D is correct.
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determine the number of significant figures in 478 cm
Answer:
There are 3 significant figures on this one.
how many moles of ions is in Magnesium chloride?
When crossing parents with genotypes Rr and rr what will be the percentage of the genotypes of the offspring
Answer:
Explanation:
Heterozygous cross with a hom.ozygous recessive yields the following results
50% rr (hom.ogyzous recessive)
50% Rr (heterozygous dominant)
A heterozygous cross with a homozygous recessive gives the following results: 50% rr (homozygous recessive) and 50% Rr (heterozygous dominant).
What is Parental crossing?Crossing over is a type of cellular process which occurs during the process of meiosis when chromosomes of the same type line up. When these two chromosomes – one from the mother and one from the father – line up, parts of the chromosome can be switched. Two chromosomes contain the same genes, but the genes may have different forms.
The organisms in this initial hybridization are called the parental or P generation. The progeny of the Rr x rr cross are called F1 generation which will have a heterozygous cross with the homozygous recessive giving the following results: 50% Rr (homozygous recessive) and 50% rr (heterozygous dominant)
A cross between two of the offspring in F1 generation would produce a new set of progeny called second filial generation (or F2 generation).
Thus, a heterozygous cross with a homozygous recessive gives the following results: 50% rr (homozygous recessive) and 50% Rr (heterozygous dominant).
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Which radiation detection device is the best to use for measuring the presence of radiation in large moving objects where constant monitoring is impossible?
film badge
Geiger counter
cloud chamber
scintillation counter
Answer:
A film badge
Explanation:
The film badge dosimeter or film badge is a personal dosimeter used for monitoring cumulative radiation dose due to ionizing radiation. It of a photographic film and a holder. This film badge is used to determine or measure and record the radiation exposure as a result of radiations, x-rays, gamma rays and also beta particles.
All users of medical x-ray equipment (C-arms, fluoro units, therapy units) must wear badges. Those using larger quantities of radioactive materials will also be provided badges. The correct option is A.
What is film badge?Ionising radiation exposure is measured using photographic film for personnel monitoring purposes. A filter that protects part of the film from particular types of radiation may also be present in the film badge, which may contain two or three films with varying sensitivity levels.
A particular kind of passive dosimeter is the film badge. It comprises of a photographic emulsion film in a light-tight wrapping (kept in a holder) that changes optical density in response to ionising radiation. The holder, which also includes several filters (for calculating tissue equivalent amounts), is typically worn on the body's trunk.
So film badge is the device used most commonly today for monitoring the radiation exposure of personnel.
Thus the correct option is A.
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Every closed circuit has an electric current, voltage, and ___________..
Fill in the blank
1 mole of hydrochloric acid reacts with 1 mole of sodium hydroxide to give _______ g of sodium chloride.
Answer:
58,5
Explanation:
Como Representar la distribución electrónica por el método de la escalera y con los cajones de la distribución eléctronica: En "s" máximo 2 electrones En "p" máximo 6 electrones En "d" máximo 10 electrones
Answer:
Como Representar la distribución electrónica por el método de la escalera y con los cajones de la distribución eléctronica: En "s" máximo 2 electrones En "p" máximo 6 electrones En "d" máximo 10 electrones
Explanation:
SISISISISISISISISISISI
Akosua has observed that anytime she drinks sobolo, her stool appears dark green. On one occasion
Akosua observed that her stool, which appeared dark green, turned quickly to bright red upon mixing with the perchloric acid-treated WC water.
i. What about the sobolo drink (bright red) that made the stool of Akosua green?
ii. Why did the stool of Akosua, which appeared green because she took sobolo drink, turn into
bright red upon mixing with the acidic WC water?
iii. Suggest a practical use of sobolo drink in the identification of chemicals in the science laboratory .
Answer:
i. Sobolo is a Ghanian drink that is produced from red hibiscus flower that has an average pH of 6.7
It contains cyanidin and anthocyanins, which is a red pigment that is red in an acidic medium and changes green when introduced in a basic medium that has a high pH
The pH at the rectum of the digestive system = 5 to 8 (Slightly basic)
Therefore, what made the stool of Akosua green is that the sobolo drink changes to green in basic solution
ii. The stool which appeared green because she took sobolo turn into bright red upon mixing with the acidic WC water because of the presence of anthocyanins in sobolo, it turns red in an acidic medium
iii. Sobolo which turns green, or blue in a basic medium and red in an acidic medium can be used as a litmus solution to test the pH of a given substance
Explanation:
Sobolo or soobolo in Ghana is a name for the Hibiscus tea or tisane, which is made from calyces of the hibiscus plant, and has a sour (tangy) taste and appears bright red in color
Let's say that you were given the following
problem:
A gas that exerts a pressure of 151 mm Hg in a
container with a volume of L will exert a
pressure of 166 mm Hg when transferred to a
container with a volume of 0.532 L.
Let's begin by assigning our variables. Let's say
that P1 = 151 mm Hg. What is V2?
Answer:
V2~0.4839M
Explanation:
We're going to use Boyles law to answer the question.
Boyle's law:
P1V1=P2V2
P1=151mmHg
P2=166mmHg
V1=0.532L
V2=?
V2=(P1 x V1)/P2
V2=(151 x 0.532)/166
V2~0.4839M
Hope it helps:)
Answer: C. unknown
Explanation: got it right on acellus
Which of these events is likely to have caused the mass extinction of the dinosaurs?
A.An increase in Earth's overall temperature
B. A large volcanic eruption on nearby islands
C. The fallout of a meteor colliding with Earth's surface
D. Rising sea levels flooding low-lying coastlines
b) determine the number of moles of carbon dioxide
produced.
Explanation:
The mass of one mole of a substance, expressed in gms, is equal to the mean molecular mass of the substance. The molecular mass of CO2= 12+2x16= 44 so the mass if a mole of CO2 is approximately 44 grams.
Hope it helps!!!...
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HELP PLEASE!!!!!!!
140 grams of lead (II) nitrate are dissolved in water then mixed with a solution containing 75 grams of sodium chloride. The reaction creates the precipitate, lead (II) Chloride, and a solution of sodium nitrate. How many grams of lead (II) Chloride can be produced given the initial amount of lead (II) nitrate?
Answer:
Try a grams calculator, Its pretty to nd one :D
Explanation:
what does Avogadro's law state and what is the formula
The law is approximately valid for real gases at sufficiently low pressures and high temperatures. The specific number of molecules in one gram-mole of a substance, defined as the molecular weight in grams, is 6.02214076 × 1023, a quantity called Avogadro's number, or the Avogadro constant.
Answer:
Hello There!!
Explanation:
The answer is that it states that under the same pressure and temperature conditions, equal volumes of all gases contain the same number of molecules.
Formula:Vn=k
hope this helps,have a great day!!
~Pinky~
Hello, anyone? help me
The reaction is run at two temperatures where temperature 1 is lower than temperature 2. Which relationship is correct for either rate constant (k1 or k2) or activation energy (Ea,1 and Ea,2)
Answer:
The answer is "[tex]K_1 < K_2[/tex]"
Explanation:
In the given question, the value of the [tex]K=Ae^{-\frac{Ea}{RT}}[/tex] and the [tex]T_1 <T_2[/tex]is the rate value which is the constant that is [tex]K_2>K_1[/tex]. As per the temperature value when its increase rate is constantly increasing. [tex]E_a[/tex] is activation energy it is not dependent on the temperature that why the answer is [tex]K_1 < K_2[/tex].
NaOH+ N2O3---> ___+____
Answer:
NaOH+ N2O3---> NaNO2 + H2O
Tipo de enlace en los compuestos. Compuesto /Electronegatividad Elemento 1/Electronegatividad Elemento 2/ Diferencia de electronegatividad (resta) Tipo de enlace CO2 KCl H2O
Answer:
Tipo de enlace enlace en CO2 - Covalente
Tipo de enlace enlace en KCl - iónico
Tipo de enlace enlace en H2O: enlaces covalentes y de hidrógeno
Electronegatividad de CO2 - Diferencia en electronegatividad de carbono (EN = 2.5) y oxígeno (EN = 3.5) = 3.5 - 2.5 = 1
Diferencia en electronegatividad de KCl = 3,2 -0,8 = 2,4
Diferencia en electronegatividad de H2O = 3.5 -2.1 = 1.4
Explanation:
Tipo de enlace enlace en CO2 - Covalente
Tipo de enlace enlace en KCl - iónico
Tipo de enlace enlace en H2O: enlaces covalentes y de hidrógeno
Electronegatividad de CO2 - Diferencia en electronegatividad de carbono (EN = 2.5) y oxígeno (EN = 3.5) = 3.5 - 2.5 = 1
Diferencia en electronegatividad de KCl = 3,2 -0,8 = 2,4
Diferencia en electronegatividad de H2O = 3.5 -2.1 = 1.4
2Al(s) + 3Cu^3 + (aq) -> 2Al^3 + 3Cu(s) which reactant is reduced and which is oxidicided.
Pls help I have a test in 1h
Answer:
Al is oxidized
Cu is reduced
Answer:
here
Cu is reduced
and
Al is oxidised
hope this will help you
have a nice day
Why are polar gases, such as H2O and NH3, more likely to deviate from the ideal gas behaviors described by the kinetic molecular theory? (3 points)
Question 4 options:
1)
The density of these gases is high, increasing the number of collisions and reducing their elasticity.
2)
The fluidity of these gases is high, resulting in a higher average kinetic energy.
3)
The particles have a significant volume, reducing the space between the moving particles.
4)
The particles have high intermolecular forces, reducing the elasticity of their collisions.
Answer:
HCl, H2O, and NH3 are the most polar of these, so they won't behave ideally because the particles have greater attractive forces between them. How does the kinetic-molecular theory explain the pressure exerted by gases? ... Particles are always in motion and when they are contained, they are elastic collisions.
The particles have high intermolecular forces, reducing the elasticity of their collisions.
What are polar gases?Polar molecules are formed when a high electronegative atom combined with a less electronegative atom.
Ammonia, sulfur dioxide, hydrogen sulfide, are polar gases.
The non-polar gases are inert gas or noble gas.
The polar compounds are asymmetrically array.
Thus, the correct option is 4, The particles have high intermolecular forces, reducing the elasticity of their collisions.
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HELP!
The piston of an internal combustion engine
compresses 218 mL of gas. The final pressure
is 15 times greater than the initial pressure.
What is the final volume of the gas, assuming
constant temperature?
Answer in units of mL.
Answer:
14.53
Explanation:
V1= 218ML
V2= ?
P2= 15P1
USING BOYLE'S LAW
P1V1= P2V2
V2= P1V1/P2
V2 = P1(218ML)/15P1 = 14.53ML
Is this an alpha or beta decay?
how do valence electrons interact between non polar covalent, polar covalent, and ionic bonds?
Answer:
In non-polar covalent bonds, the electrons are equally shared between the two atoms. For atoms with differing electronegativity, the bond will be a polar covalent interaction, where the electrons will not be shared equally.
Explanation:
i did some reasherch so there^^
A 0.530 M Ca(OH)2 solution was prepared by dissolving 36.0 grams of Ca(OH)2 in enough water. What is the total volume of the solution thus formed?
Answer:
0.917
Explanation:
Answer:
0.917
Explanation:
Just took the test
Use the reaction shown l to answer these questions.
2CO(g) + 2NO) → N2(g) + 2CO2(g)
If 42.7 g of CO is reacted completely at STP, what
volume of N2 gas will be produced?
Answer:
16.8dm3
Explanation:
2 moles of CO gives 1 mole of N2
2 moles of CO= 2* 28= 56g
1 mole of N2 = 1* 22.4dm
56g of CO gives 22.4dm3 of N2
42.7 of CO will give> (42.7*22.4)/56
=16.8dm3
The volume of [tex]N_{2}[/tex] gas will be produced 16.8 [tex]dm^{3}[/tex].
What is volumeVolume is sometimes referred to as capacity. The volume of a cylindrical jar, for example, is used to determine how much water it can hold.
Calculation of volume is shown below:
The given reaction is: 2CO(g) + 2NO) → N2(g) + 2CO2(g)
It can be seen that 2 moles of CO give 1 mole of [tex]N_{2}[/tex].
So, 2 moles of CO = 2×28 = 56 g.
Hence, 1 mole of [tex]N_{2}[/tex] = 1×22.4 = 22.4 [tex]dm^{3}[/tex].
56 g of CO will give 22.4 [tex]dm^{3}[/tex] of nitrogen atom.
42.7 of CO will give = (42.7×22.4) / 56
= 16.8 [tex]dm^{3}[/tex].
Therefore, the volume of nitrogen will be 16.8 [tex]dm^{3}[/tex].
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