Explanation:
from the equation we know that 500g of Mgcl are produced.
but we also know that 83g of Mgcl will give 2g of hydrogen
therefore, 500g of Mgcl will give x g of hydrogen
x=
500*2/83g = 12.04g
if you have not yet understood just leave a message
During a phase change, such as melting or boiling, the kinetic energy __. Highlight correct answer
Answer: During a phase change, such as melting or boiling, the kinetic energy increases.
Explanation:
Kinetic energy is the energy obtained by the molecules of a substance due to their motion.
When phase change such as melting or boiling takes place then it means heat is absorbed by the substance. As a result, their molecules more even more rapidly from one place to another due to which more number of collisions take place.
Hence, a change in phase of substance occurs as kinetic energy increases in melting or boiling process.
Thus, we can conclude that during a phase change, such as melting or boiling, the kinetic energy increases.
63.15 mL of calcium hydroxide is required to titrate 18.9 mL of a 0.200 M H3PO4 solution. What is the molarity of the basic solution?
Answer:
0.0898M is the molarity of the basic solution
Explanation:
The reaction of calcium hydroxide, Ca(OH)₂ with H₃PO₄ is:
3 Ca(OH)₂ + 2 H₃PO₄ → 6H₂O + Ca₃(PO₄)₂
To solve this question we must find the moles of H3PO4 that react. With the moles and the rection we can find the moles of Ca(OH)2. Using its volume we can find its molarity:
Moles H3PO4:
0.0189L * (0.200mol / L) = 0.00378 moles H3PO4
Moles Ca(OH)2:
0.00378 moles H3PO4 * (3mol Ca(OH)2 / 2mol H3PO4) = 0.00567 moles Ca(OH)2
Molarity:
0.00567 moles Ca(OH)2 / 0.06315L =
0.0898M is the molarity of the basic solution890J of heat are applied to a piece of aluminum, causing a 4.6°C increase in its temperature. The specific heat of aluminum is 0.902 J/g°C. What is the mass of aluminum?
Question 12 options:
175g
3,693g
214g
0.00220g
Answer:
214
Explanation:
Q=mco
Q=heat
M is mass
C is specific heat
O is increased in temperature
B) A company president would like to offer a 4.00 L cylinder containing 500 g of chlorine in the new catalog. The cylinders you have on hand have a rupture pressure of 40 atm. Use both the ideal gas law and the van der Waals equation to calculate the pressure in a cylinder at 25°C. Given a = 6.58 L2 atm mol-2 and b = 0.056 L mol-2, Cl =35.5. (5 marks)
Answer:
43.1atm is the pressure using gas law and 27.2atm using Van der Waals Law.
Explanation:
Ideal gas law is:
PV = nRT
Where P is pressure in atm
V is volume = 4.00L
n are moles of the gas (For chlorine Molar Mass: 70.90g/mol):
500g * (1mol / 70.90g) = 7.052 moles
R is gas constant = 0.082atmL/molK
T is absolute temperature = 25°C + 273 = 298K
To solve the pressure, P:
P = nRT/V
P = 7.052mol*0.082atmL/molK*298K / 4.00L
P = 43.1atm is the pressure using gas law.
Van der Waals equation is:
[tex]P + a(\frac{n}{V})^2 * (V-nb) = nRT[/tex]
Where a is 6.58L²atm*mol⁻²
b = 0.056Lmol⁻²
Solving for pressure:
[tex]P + a(\frac{n}{V})^2 = \frac{nRT}{(V-nb)}[/tex]
[tex]P = \frac{nRT}{(V-nb)}-a(\frac{n}{V})^2[/tex]
[tex]P = \frac{7.052mol*0.082atmL/molK*298K}{(4.00L-7.052mol*0.056L*mol)}-6.58L^2mol^{-2}(\frac{7.052mol}{4.00L})^2[/tex]
P = 172.323 / 3.6051 - 20.4866
P = 27.2atm using Van der Waals Law
Represente lo que ocurre mediante flechas cuando dos cargas negativas, dos cargas positivas y una carga positiva y otra negativa se acercan Es urgente
Answer:
Neutral.
Explicación:
Cuando dos cargas negativas, dos cargas positivas y una carga positiva y una carga negativa se unen, los átomos se vuelven neutrales porque las cargas opuestas cancelan el efecto de la otra. Si hay igual número de cargas y además son opuestas entre sí, entonces todas estas cargas cancelan el efecto de la otra formando el átomo neutral, pero si hay diferencia en el número de cargas, entonces la carga que es alta en número aparece en el átomos.
is the answer A or B?
Answer:
Letter DHope I helped!♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥
Arcturus is a star whose surface temperature is 4290 K. What is most likely the color of Arcturus? What is most likely the mass of Arcturus? about solar masses
Answer:
orange
0.8
Explanation:
On egde
Acturus which is a star with surface temperature 4290 K is orange in color and has a mass of 0.8 kilograms.
What is a star?
A star is an astronomical object comprising a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the eye at night, but their immense distances from Earth make them appear as fixed points of light. The most prominent stars have been categorised into constellations and asterisms, and many of the brightest stars have proper names.
Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated 1022 to 1024 stars.A star's life begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements.
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why sodium chloride is a poor conductor of electricity in solid state?
Answer:
Because the electrons in this ionic compound arent free to move and so cannot carry charge. For an iconic compound to conduct electricity it must be a liquid, either in a molten form or dissolved in water.
Explanation:
Is this clear?
Which of the following is not a reason for extinction?
a change in climate
a change in predation rate
the ability to breed successfully
loss of habitat
Answer:
the ability to breed successfully
Explanation:
Answer:
the ability to breed successfully
Explanation:
the more offspring's an organism has, the less chance of extinction would happen. I hope that helped bestie
what do you call the materials in which electricity pass easily?
a. insulator
b. conductors
c. non conductors
d. metallic
Answer:
Conductors
Explanation:
Please Answer all 4 questions and i will give brainliest!
You haven't added the 4 questions, so when you upload them, i'll answer.
Does someone know the answers?
Answer:
b)sugar and water : Sedementation
d) salt and water : evaporation
Give me an example of electrons. in your own words.
Answer:
Electrons are the negative particles that are part of an atom
Explanation:
It’s short sorry
Discuss the issue of “energy return” when considering a biofuel
Explanation:
Regarding non-GHG environmental impacts, research suggests that production of biofuel feedstocks, particularly food crops like corn and soy, could increase water pollution from nutrients, pesticides, and sediment (NRC 2011). Increases in irrigation and ethanol refining could deplete aquifers (NRC 2011).Regarding non-GHG environmental impacts, research suggests that production of biofuel feedstocks, particularly food crops like corn and soy, could increase water pollution from nutrients, pesticides, and sediment (NRC 2011). Increases in irrigation and ethanol refining could deplete aquifers (NRC 2011)
plz help me get it right and no links
Answer:
get what right?
Answer:
You didn't post the question.
Explanation:
Edit your question and I'll try to help you.
Hope this helped? Lol.
How many grams are there in 3.26 x 10^25 Molecules of Mg(NO3)2?
Answer:
8025.996 grams are there in 3.26*10²⁵ Molecules of Mg(NO₃)₂.
Explanation:
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression. Avogadro's number applies to any substance.
Then you can apply the following rule of three: if 6.023*10²³ molecules are contained in 1 mole of the compound, 3.26*10²⁵ molecules are contained in how many moles of the compound?
[tex]amount of moles=\frac{3.26*10^{25}molecules*1 mole }{6.023*10^{23}molecules }[/tex]
amount of moles= 54.12
Molar mass is the mass of one mole of a substance, which can be an element or a compound. Being the molar mass of the compound Mg(NO₃)₂ 148.3 g/mole, so 54.12 moles of the compound contains 8025.996 grams.
8025.996 grams are there in 3.26*10²⁵ Molecules of Mg(NO₃)₂.
What happens when a liquid becomes a gas?
A. It changes shape and volume
B. It changed volume but not shape
C. It changes shape but not volume
D. Nothing happens
Answer:
A It changes shape and volume
Explanation:If a liquid turns into a gas it starts to change shape since they are not the same
Answer:I believe it’s A
Explanation:when a liquid turns into a gas it the volume increases of the substance and of course the shape changes
help me get this right no links
I need help cause this teacher won’t stop cursin
The following chemical equations are organized by reaction type. You must balance each reaction, and show your work
Answer:
lets be honest
Explanation:
no one knows and this is worthless to answer for the worth of 5 points
HELPPPPPP!!!! ILL MARK YOU BRAINLIEST!
A cube has a mass of 100g and each side is 5cm. What is its density?
help, also brainly dont be mean and delete this.
if you steal my points, please dont i need genuine help
Answer:
I dont understand what is the question you need help on-
Explanation:
If the temperature of a gas inside a flexible container with a volume of 50 liters (L) decreases from 500°C to 100°C what will be the new volume of the container?
40.00L
10.00L
24.13L
103.6L
If the temperature of a gas inside a flexible container with a volume of 50 liters (L) decreases from 500°C to 100°C, then new volume will be 10L.
What is the relation between volume and temperature?Volume and temperature of the gas is directly proportional to each other and for this question, equation becomes,
V₁/T₁ = V₂/T₂, where
V₁ = initial volume = 50L
T₁ = initial temperature = 500°C
V₂ = final volume = ?
T₂ = final temperature = 100°C
On putting values, we get
V₂ = (50)(100) / (500) = 10L
Hence required volume of gas is 10L.
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PLEASE HELP NEED AN ANSWER ASAP!!!!
PICTURES BELOW!!!!
Two graphs above show a catalytic reaction, which color of balls represents a catalyst?
Select one:
a. Purple
b. Blue
c. Red
d. Green
Explain how you find the instantaneous speed or velocity of an object
I dont want to know WHAT it is I want to know HOW to find it
Answer:
divide the distance by the average
Explanation:
ash QC ok
Using the half-life graph of cobalt-57, choose ALL the statements that are accurate.
es )
A)
The half-life of Co-57 is 20 days.
B)
The half-Life of Co-57 is 10 days.
C)
After fifty days, there is 0% or no Co-57 remaining.
D)
After twenty days have elapsed, about 25% of the Co-57 remains.
E)
Scientists have an 8 gram sample of Co-57. After thirty days, 1 gram
remains.
Answer: B) The half-life of Co-57 is 10 days
D) After twenty days have elapsed, about 25% of the Co-57 remains.
E) Scientists have an 8 gram sample of Co-57. After thirty days, 1 gram remains.
Explanation:
Which process is exothermic?
a) the vaporization of water b) the freezing of water c)the sublimation of dry ice d ) the boiling of liquid nitrogen
Answer:
Freezing of water
Explanation:
When water becomes a solid it releases heat into its surroundings (warming it up).
How many Liters of space will a 70.0g sample of CO2 occupy? You must show all work to receive full credit.
Answer: the answer is 35.6
Explanation:
Look up the answer but take out you must show all your work and resources should pop up I’m on the same question now for chemistry so I’m putting 35.6L
How many hydrogen atoms are present in an alkyne with 5 carbon atoms?
Answer:
cuatro
Explanation:
ino->4
Alkynes are triple bonded hydrocarbons. There are 7 hydrogen in an alkyne with 5 carbon atoms. This compound can be named as pentyne.
What are alkynes?Alkynes are hydrocarbons with one triple bond between two carbon atoms. alkynes are unsaturated compounds. Alkynes are named with the suffix 'yne' like ethyne, propyne etc..
There are three types of hydrocarbons namely, alkanes, alkenes and alkynes. Alkanes are saturated hydrocarbon having single bond between carbon atoms. Eg. methane , ethane etc all having suffix of 'ane'. Alkenes are unsaturated hydrocarbons with double bond between two or more carbon atoms.
Alkenes are named with the suffix 'ene'. Hence, the names become ethene, propene etc. The prefix for the names of hydrocarbons is based on the number of carbons. meth for 2, eth for 2 prop for 3, but for 4 and pent for 5 and so on.
The valency of carbon is 4 and it will bind to four other atoms. When it forms triple bond with a carbon it can bind to one hydrogen only. If it is a middle carbon then it dont have a hydrogen since either side will be carbons.
Thus for a 5 carbon alkyne, there will be total 7 hydrogens and the compound is pentyne.
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Help me get it right and no links
Answer:
i think the second answer " fish migration might be prevented" might possibly be your answer