Answer:
Plasma
Explanation:
In addition to solid, liquid and gas, there exists a fourth state of matter called the plasma.
Plasma is a state of matter involving super=heated matter such that electrons leave atoms thereby leading to the formation of an ionized gas.
In summary, plasma is a hot, gas-like mixture with no definite volume or shape that is made up of electrically charged particles.
FREE BRAINLIEST!!!!! You have two objects. One is hot the other is cold (lack of heat). In what direction does the heat want to travel?
Answer:
the heat wants to travel up. Heat rises
Explanation:
Show work, thanks
1. How many grams of AgNO3 are necessary to make 1.0 L of a 6.0 M stock solution?
2. How would you make 1.0 L of a 0.1 M solution of AgNO3 from your 6.0 M stock solution?
Answer:
Q.1
Given-
Volume of solution-1 L
Molarity of solution -6M
to find gms of AgNO3-?
Molarity = number of moles of solute/volume of solution in litre
number of moles of solute = 6×1= 6moles
one moles of AgNO3 weighs 169.87 g
so mass of 6 moles of AgNO3 = 169.87×6=1019.22
so you need 1019.22 g of AgNO3 to make 1.0 L of a 6.0 M solution
1. the grams of [tex]\rm AgNO_3[/tex] is 1019.22.
2. 10,192.2
What is molarity?Molarity is the measure of the concentration of any solute in per unit volume of the solution.
1. Volume is 1.0 l.
Molarity of solution -6 m
To find the mass of [tex]\rm AgNO_3[/tex]
[tex]\rm Molarity = \dfrac{n}{V}\\\\rm 6 = \dfrac{n}{1}\\\\n = 6 \times 1 = 6[/tex]
Mass of One mole of [tex]\rm AgNO_3[/tex] is 169.87 g
Therefore, the mass of 6 moles will be
169.87 × 6 = 1019.22
2. Molarity of solution 6.0
Volume of solution is 0.1m
The mass of 6 moles will be
169.87 × 6 = 1019.22
[tex]\rm density = \dfrac{mass }{volume} \\\\\rm density = \dfrac{1019.22 }{0.1} = 10,192.2[/tex]
Thus, the options are 1. 1019.22 2. 10,192.2
Learn more about molarity, here
Calculate the temperature of a gas when it is expanded to 5.25L. The gas originally occupies 3.90L of space at 252K.
Answer:
[tex]T_2=339K[/tex]
Explanation:
Hello there!
In this case, according to the Charles' gas law as way to understand the volume-temperature as a directly proportional relationship for this problem, we can write:
[tex]\frac{T_2}{V_2}=\frac{T_1}{V_1}[/tex]
Thus, given the initial temperature and volume and the final volume, we are able to calculate the final temperature as follows:
[tex]T_2=\frac{T_1V_2}{V_1} \\\\T_2=\frac{252K*5.25L}{3.90L}\\\\T_2=339K[/tex]
Best regards!
Cutting, melting, bending, or crushing are examples of what kind of change?
Answer:
those are all physical changes and most physical changes can be undone like crushing a pice of metal you can flatten it back out you anwser is physical change
Explanation:
Answer:
It is a physical change because it can be reversed back and no new subtances is dormed.
Using the balanced reaction 2Al2O3 → 4Al + 3O2 determine the moles of Aluminum Oxide, Al2O3 produced when 85.5 grams of Aluminum Al is produced.
molar masses: Al2O3 = 85.962 O2= 31.998 Al = 26.982
A 1.58 mol
B 8.95 mol
C 6.34 mol
D 1.67 mol
Answer:
The correct option is option;
A. 1.58 mol
Explanation:
The given balanced chemical reaction is presented as follows;
2Al₂O₃ → 4Al + 3O₂
The given mass of Al produced = 85.5 grams
The given molar mass of Al₂O₃ = 85.962 g/mol
The given molar mass of O₂ = 31.998 g/mol
The given molar mass of Al = 26.982 g/mol
[tex]We \ note \ that \ the \ number \ of \ moles, \ n = \dfrac{Mass }{Molar \ mass}[/tex]
For the given produced Al, n = 85.5 g/(26.982 g/mol) ≈ 3.169 moles
From the given reaction, we have;
2 moles of Al₂O₃ produces 4 moles of Al
∴ 2/4 moles of Al₂O₃ produces 4/4 = 1 mole of Al
2/4 × 3.169 = 1.5845 moles of Al₂O₃ produces 1 × 3.169 = 3.169 moles of Al
∴ 1.5845 ≈ 1.58 moles of Al₂O₃ produces 3.169 moles of Al ≡ 85.5 grams of Al
The correct option is approximately 1.58 moles of Al₂O₃.
How many grams of KNO3 would recrystallize from 100 g of water, if a saturated solution were cooled from 50 degrees celcius to 20 degrees celcius?
Answer:
[tex]m_{cryst}=58g[/tex]
Explanation:
Hello there!
In this case, according to the attached solubility chart, it is possible for us to realize that about 88 grams of KNO3 are soluble at 50 °C but just 30 grams are soluble at 20 °C in the same 100 g of water.
In such a way, the crystalized mass of this solute can be calculated by subtracting the mass at 50 °C and the mass at 20 °C:
[tex]m_{cryst}=88g-30g\\\\m_{cryst}=58g[/tex]
Best regards!
A 10 kg package is delivered to your house.
Use one complete sentence to describe an example of how work is done on the package as it gets brought inside.
Make sure to use proper spelling, grammar, and other language mechanics.
In your explanation, make sure to use the terms related to the formula for work (W = Fd).
Answer:
Explanation:
Work is a net force applied through a distance in order to displace an object, commonly abbreviated as W. A net force is the sum of all forces acting on an object. Work is mass times acceleration and distance so to find out the work you simply calculate the acceleration of the box being brought in. Next find the distance it was carried to get in the house. Then find out the mass of the box and finally multiply those sums together to get the amount of work put in to bring the package inside.
What is the [OH) if the poH is 4.9?
a) 4.9 x 10-10 M
Ob) 1.0 x 10-4 M
C) 1.25 x 10-5 M
O d) 7.94 x 10-10 M
Answer:
the answer is 4.9×10-10M
How many grams of carbon dioxide can be produced from 2.0 g of ethene and 2.9 g of oxygen?
Answer:
The reaction takes place is
2 (C2H6) + 7 (O2) → 4(CO2) + 6(H2O)
According to the equation,
60g ethane requires 7x32= 224g oxygen
here ethane is in excess.oxygen will be consumed completely.
hence
2.9 g O2 will consume 60×2.9/224=0.776g of C2H6
now,
2 moles of C2H6 produces 4 moles of CO2!
60g ethane produces 4x44 g CO2
hence amount of CO2 produced =4×44×0.776/60=2.27g
31. Use the equation given below to answer the following question: If 755 kJ of heat was absorbed, what mass of carbon dioxide reacted?
2CO2 + 43.9 kJ → 2CO +O2
Answer:
1514g of CO₂ reacted
Explanation:
Based on the reaction:
2CO₂ + 43.9kJ → 2CO + O₂
2 moles of carbon dioxide require 43.9kJ of energy to produce 2 moles of carbon monoxide and 1 mole of oxygen
To solve this question, we must convert the 755kJ of energy to moles of carbon dioxide that reacts and to find the mass as follows:
755kJ * (2 moles CO₂ / 43.9kJ) =34.4 moles of CO₂ are produced
Mass CO₂: Molar mass: 44.01g/mol
34.4 moles CO₂ * (44.01g / mol) =
1514g of CO₂ reactedhelp it’s for today, not accepting links
How is Percent Composition of a molecule by atoms different than Percent Composition of a molecule by mass of?
Answer:
Percent composition by mulecules is: (mass of element/molecular mass) x 100
Percent composition by atoms is: (mass of element/molecular mass) x 100.
Explanation:
So their the same
is alcohol a pure substance or a mixture
Body systems are groups of organs that work together to perform a specific function for the organism. Which body system is responsible for eliminating unused by-products excreted from cells and helping balance chemical and water concentrations within the body?
Answer:
It is Excretory system.
:)
nickel (iii) cyanide + aluminum permanganate product?
Answer:
Nickel(II) cyanide is an inorganic compound with a chemical formula Ni(CN)₂
Explanation:
Hope it helps u
FOLLOW MY ACCOUNT PLS PLS
how many moles are there in 2.75L of a 2.0M solution
how many grams are in 2.34 moles of Li?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Lithium, or 6.941 grams.
Thus, the answer would be 16.24194.
Explanation:
Describe how platelets function
Answer:
Platelets are tiny blood cells that help your body form clots to stop bleeding.
Explanation:
If one of your blood vessels gets damaged, it sends out signals to the platelets. The platelets then rush to the site of damage and form a plug (clot) to fix the damage.
[tex]\huge{\mathbb{\tt {ANSWER↓}}}[/tex]
Platelets are only about 20% of the diameter of red blood cells. The normal platelet count is 150,000-350,000 per microliter of blood, but since platelets are so small, they make up just a tiny fraction of the blood volume. The principal function of platelets is to prevent bleeding.#CarryOnLearning
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→XxKim02xXPlease help me with this net ionic chem question. I’ll mark you brainiest if you know it.
Answer:
B: 3k+ + 3OH¯ + Fe3+ + 3KOH = Fe3(H) + + 3NO3¯
Explanation:
Potassium hydroxide (KOH) reacts with iron (III).
The normal balanced equation is;
Fe(NO3)3 + 3KOH = Fe(OH)3 + 3KNO3
Now the ionic equation will be;
3k+ + 3OH¯ + Fe3+ + 3KOH = Fe3(H) + + 3NO3¯
3 If methane burns in a poor supply of air it will give carbon
monoxide and water instead. See if you can write a balanced equation to show this.
Answer:
2CH4 + 3O2 → 2CO + 4H2O
Explanation:
When methane is burnt in adequate supply of oxygen, then carbon dioxide is produced but when methane is burnt in limited supply of oxygen, then carbon mono-oxide is produced.
The balanced equation for the same is as follows -
2CH4 + 3O2 → 2CO + 4H2O
A sample of nitrogen gas is collected over water at temperature of 20.0˚C. What is the pressure of the nitrogen gas if atmospheric pressure is 1.01atm? (vapor pressure of water at 20.0˚C is 17.5 torr)
Answer:
[tex]P_N=0.987atm[/tex]
Explanation:
Hello there!
In this case, for these problems about collecting a gas over water, we must keep in mind that once the gas has been collected, the total pressure of the system is given by the atmospheric pressure, in this case 1.01 atm. Next, since we also have water in the mixture, we can write the following equation:
[tex]P_T=P_w+P_N[/tex]
Thus, by solving for the pressure of nitrogen and using consistent units, we obtain:
[tex]1.01atm=17.5torr*\frac{1atm}{760torr} +P_N\\\\P_N=1.01atm-0.023atm\\\\P_N=0.987atm[/tex]
Calculate the area of an applied force of 300 N and a pressure of 35 Pa? (the answer needs to be accurate with 2 decimal places!)
Answer:
Explanation: 1Pa 1 N/m^2. p = F/A and A = F/p = 300N /35 Pa = 8.57 m^2
How many liters of water do we need to add to 5.00 moles to get a 0.648 M solution?
Answer: This is a typical acid/base equilibrium problem, that involves the use of logarithms.
Explanation:We assume that both nitric acid and hydrochloric acid dissociate to give stoichiometric
H
3
O
+
.
Moles of nitric acid:
26.0
×
10
−
3
⋅
L
×
8.00
⋅
m
o
l
⋅
L
−
1
=
0.208
⋅
m
o
l
H
N
O
3
(
a
q
)
.
And, moles of hydrochloric acid:
88.0
×
10
−
3
⋅
L
×
5.00
⋅
m
o
l
⋅
L
−
1
=
0.440
⋅
m
o
l
H
C
l
(
a
q
)
.
This molar quantity is diluted to
1.00
L
. Concentration in moles/Litre =
(
0.208
+
0.440
)
⋅
m
o
l
1
L
=
0.648
⋅
m
o
l
⋅
L
−
1
.
Now we know that water undergoes autoprotolysis:
H
2
O
(
l
)
⇌
H
+
+
O
H
−
. This is another equilibrium reaction, and the ion product
[
H
+
]
[
O
H
−
]
=
K
w
. This constant,
K
w
=
10
−
14
at
298
K
.
So
[
H
+
]
=
0.648
⋅
m
o
l
⋅
L
−
1
;
[
O
H
−
]
=
K
w
[
H
+
]
=
10
−
14
0.648
=
?
?
p
H
=
−
log
10
[
H
+
]
=
−
log
10
(
0.648
)
=
?
?
Alternatively, we know further that
p
H
+
p
O
H
=
14
. Once you have
p
H
,
p
O
H
is easy to find. Take the antilogarithm of this to get
[
O
H
−
]
.
Answer link
The concentration of C6H12O6 may be represented as (C6H12O6) {C6H12O6} [C6H12O6]
Answer:
[tex][C_6H_{12}O_6][/tex]
Explanation:
Hello there!
In this case, since the concept of solution concentration is majorly used in terms of moles per liters of solution or molarity (M), it is also possible to represent this chemical unit by using squared brackets, [ ].
In such a way, when focused on the concentration of glucose, C6H12O6, we can use:
[tex][C_6H_{12}O_6][/tex]
Best regards!
What are some of the sources of pollution in south shore, chicago, where there are primarily people of color?
Answer:
Air pollution, Water pollution, disposal of hazardous waste, exposure to lead paint and vehicle traffic
Explanation:
On the west and South side of Chicago, the minority neighborhoods are affected by the exposure to toxic air pollution and other environmental health hazards such as Water pollution, disposal of hazardous waste, exposure to lead paint and vehicle traffic.
Please help me with this net ionic chem question I’ll mark you brainiest if it’s correct
Answer:
The answer is Co2+(aq) + 2 OH-(aq) -> Co(OH)2(s) so the answer is c.
Explanation:
what does binding energy measure
Answer:
"Electron binding energy, more commonly known as ionization energy, is a measure of the energy required to free an electron from its atomic orbital or from a solid. ... The atomic binding energy of the atom is the energy required to disassemble an atom into free electrons and a nucleus."
Explanation:
Hope this helps! <33
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have a wonderful day!
Binding energy is a required amount of energy that disperses the other particles of the reaction system. It measures the energy needed to free an electron or a subatomic particle.
What is binding energy?Binding energy is the ionization energy that depicts how much energy will be needed if an electron has to be removed from an atom for a reaction to occur.
It can be said that the energy required to free an electron from the orbit of the atom is measured in electron volt (eV). It is a little different from ionization energy as binding energy can remove any subatomic particle and not just an electron.
Therefore, the binding energy measures the freed subatomic particle.
Learn more about binding energy here:
https://brainly.com/question/16705705
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Balance the following reactions:
1. PbO2 → PbO + O2
Explanation:
2 moles of lead oxide ->
2PbO2 -> 2PbO + O2
If the man and the ball travels 90 m in 15 seconds, what is their average
speed?
Answer:
The average speed should be 6mps (6 meter per second)
Explanation:
90 divided by 15 = 6
Please answer and thank you
Answer:
It's A.
Atoms that have the same number of valence electrons in their outer shell have similar properties and belong to the same family of elements.
two copper pennies has a mass of 6.64g how many moles of copper do they contain
Answer:
It contains 0.105 mole cu
Explanation: