Answer:
B
Explanation:
Describe how the meniscus is used to read volume measurements on a graduated cylinder
Answer:Tthe liquid in a graduated cylinder curves up at the edge where the liquid meets the wall of the cylinder. This curve in the liquid is called the meniscus and is used to determiine the volume of liquid in a graduated cylinder by observing the measurement tick closest to the bottom of the meniscus.
Explanation:
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Please answer the image and also explain the image using the words condensation evaporation condensed liquid water and rain
Answer:
Evaporation: The physical process or stage where the water changes to vapor in the sky.
Condensation: The physical process or stage where the vaporised water (vapor) changes to water (rain)
Condensed liquid water: It is called a condensate. From the image, the condensate is rain
If 4.644.64 mol of NO2NO2 occupy 25.925.9 L, how many liters will 2.732.73 mol of NO2NO2 occupy at the same temperature and pressure
Answer:
I will assume that the moles are all mistyped and will change them to:
4.64, 25.9, and 2.73.
15.2 liters
Explanation:
Both situations can be described using the ideal gas law:
PV=nRT,
where P, V, and T are the pressure, volume, and temperature (in degrees K). n is the number of moles. R is the gas constant.
First NO2 : P1(25.9L) = (4.64moles)RT
Second NO2: P2V2 = (2.73moles)RT2
Divide one equation by the other:
(P1(25.9L) = (4.64)RT1)
P2V2 = (2.73)RT2
The temperatures, pressures, and gas constants are unchanged, so we can cancel those to obtain:
(25.9L)/V2 = (4.64/2.73)
V2 = (25.9L)(2.73/4.64)
V2 = 15.2 Liters
Please hurry
Which parts of Earth contain at least one form of water? Select all that apply. O
A. Cryosphere
B. Biosphere
C. Geosphere
D. Atmosphere
E. Hydrosphere
The parts of Earth that contain at least one form of water are Cryosphere, Biosphere, Geosphere, atmosphere and Hydrosphere. i.e all the given options are applicable.
All the parts of the earth contains at least one form of water and the hydrosphere on earth contains all form of water.
The atmosphere is the gaseous envelope round the earth. Breathing involves gaseous exchange between lungs and the atmosphere.
The biosphere is the living component. It is the part dominated and domiciled by life. T
The geosphere is the rock sphere of the earth. The earth's interior is all about the geosphere.
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What is the mass of cs present in 15. 0 g of cesium acetate, formula csch3coo?.
Answer:
the answer is ''4g''
Explanation:
The mass of Cs present in 15.0 g of caesium acetate is approximately 10.18 grams.
To calculate the mass of Cs (caesium) present in 15.0 g of caesium acetate ([tex]\rm CsCH_3COO[/tex]), you need to determine the molar mass of [tex]\rm CsCH_3COO[/tex] and then find the proportion of Cs in the formula.
Molar mass of [tex]\rm CsCH_3COO[/tex]:
Cs: 1 atom * atomic mass of Cs = 1 * 132.91 g/mol = 132.91 g/mol
C: 2 atoms * atomic mass of C = 2 * 12.01 g/mol = 24.02 g/mol
H: 6 atoms * atomic mass of H = 6 * 1.01 g/mol = 6.06 g/mol
O: 2 atoms * atomic mass of O = 2 * 16.00 g/mol = 32.00 g/mol
Total molar mass of [tex]\rm CsCH_3COO[/tex] = 132.91 + 24.02 + 6.06 + 32.00 = 194.99 g/mol
Now, find the proportion of Cs in the formula:
Mass of Cs in 1 mol of [tex]\rm CsCH_3COO[/tex] = 132.91 g/mol
Mass of Cs in 15.0 g of [tex]\rm CsCH_3COO[/tex] = (15.0 g * 132.91 g/mol) / 194.99 g/mol ≈ 10.18 g
Thus, the mass of Cs present in 15.0 g of caesium acetate is approximately 10.18 grams.
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(Help Me Please!)
A student collected the data shown above. Row A may represent error
B
C
D
E
Express solution concentration in terms of molality.
Explanation:
Molality of a solution is the number of moles of solute dissolved in 1 Kg of the solvent. Thus, if one gram molecule of a solute is present in 1 kg of the solvent.
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have a great day :)
Why does a beam of light bend when it passes into a new medium?
Answer + Explaination: A beam of light bends when it passes into a new medium because light travels slower in denser medium.
4. Which location (a, b, or c) would have the highest temperature?
5. Which location(a, b, or c) would have the lowest temperature?
6. Give reasoning to explain how and why the latitude of a place on Earth affects its average temperature.
answer fast worth 100 POINTS AND WILL MARK BRAINLEST
#4
c is right above the earth's crest so it absorbs most earth .so highest temperature
#5
a is at top hence least heat absorbs so least temperature
#6
Higher the attitude lower the temperatureLower the attitude higher the temperature1. State the law of Conservation of linear momentum.
2. Explain why momentum must be conserved in an isolated system.
Answer:
Law of conservation of linear momentum :- when there is no any external force applied on a system of particles then , momentum of system of particles will be conserved or you can say that if external force is zero. Then momentum of system of particles in intially = momentum of system of particles in finally
Explanation:
According to Newton's second law of motion, because no external force occurs on the system, The change in momentum is equal to zero; hence, the linear momentum is conserved. The entire linear momentum of an isolated system, that is, a system that is not subjected to any external forces, is conserved.
1. The total amount of momentum of the collection of objects in the system is the same before the collision as after the collision.
2. It must be conserved in an isolated system because isolated systems do NOT exchange matter or energy with their surroundings.
A 20. 0-liter flask contains a mixture of argon at 0. 72 atmosphere and oxygen at 1. 65 atmospheres. What is the total pressure in the flask? A. 0. 93 atm B. 2. 37 atm C. 8. 44 atm D. 18. 6 atm.
The total pressure of the system is equivalent to the sum of all the pressure of the individual gases. The total pressure of the flask is 2.37 atm.
What is total pressure?According to Dalton's law, the total pressure of the system will be equivalent to the total of the pressures exerted by the individual gases present in the system.
The total pressure of gases is given as,
[tex]\rm P = P_{1} +P_{2}+ P_{3}.....P_{n}[/tex]
Given,
The pressure of argon gas = 0.72 atmThe pressure of oxygen = 1.65 atmTotal pressure = PSubstituting values in the above equation:
[tex]\begin{aligned}\rm P &= 0.72 + 1.65\\\\&=2.37\;\rm atm\end{aligned}[/tex]
Therefore, 2.37 atm is the total pressure of the flask.
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The substances produced i. A chemical reaction are called?
Answer:
it’s called a product
Explanation:
think of the different chemicals as a math problem you add two or more things together and you get the product
A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
Requires an investment of energy
Anabolic
catabolic
Anabolism builds molecules required for the body's functionality. The process of catabolism releases energy. Anabolic processes require energy.
When an atom of chlorine forms an ionic bond with an atom of sodium, the atom of sodium...
A) Loses an electron
B) Loses a proton
C) Becomes an ion with a larger radius than the atom of sodium
D) Gains an electron
When an atom of chlorine forms an ionic bond with an atom of sodium, the
atom of sodium loses an electron.
What is an Ionic bond?This is also known as electrovalent bond and it is the bond which occurs
as a result of elements gaining or losing electrons in a reaction.
An atom of chlorine forming an ionic bond with an atom of sodium,means
the atom of sodium will have to lose an electron in other to achieve a
stable octet configuration.
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How many compounds are found in 2.3 moles of Ca(NO3)2?
Answer:
For every 1 Ca(NO3)2 there are six (2 * NO3 or 2 * 3 O) oxygens. If you have 3 mole of Ca(NO3)2 then you have 18 mole of oxygen atoms (3*6).
Explanation:
How did the lab activities help you answer the lesson question how do the processes of conduction, convection, and radiation help distribute energy on earth? what did you learn from conducting this lab?.
Answer:Conduction transfers heat between two materials that are touching, such as foil and chocolate pieces, or particles, such as the atoms in foil.Convection allows heat to be transferred in liquids, like water.Radiation transfers heat from a light bulb to paper.Conduction,
convection, and radiation move energy from the Sun to Earth and throughout Earth.
Explanation:
Conduction: This is a flow of heat by direct contact. Heat travels from a warmer object toward a colder object.
Convection: This is a transfer of heat by mixing a fluid.
Radiation is the transfer of heat in wave form.
Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas.
Radiation is the transfer of thermal energy through thermal emission.
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Valence electrons are found on the ____ shell of an atom and ____ with other atoms. For most atoms, the magic number is __ electrons to make a compound stable. Elements in group 1 have ___ valences electron(s) and are most ____. Elements in group 18 have 8 valence electrons, making them “___” and not reactive.
Balance the Chemical reaction
2CH4—C2H6+3H2O
Answer:
2CH4 - - - > C2H6+3H2O
2C2
8H12
0O3
6CH4 + 3O - - - > 3C2H6+3H2O
6C6
24H24
3O3
I added oxygen to the reactant side because I presumed this must be a combustion of methane; since, H2O is made in the product side.
Hope this helps!
A gas at a pressure of 608 mmHg is held in a container with a volume of 545 mL. What is
the volume at standard pressure?
Answer:
441.81 mL
Explanation:
P1 x V1 = P2 x V2
V2 = P1 x V1 / P2
V2 = 608 x 545 / 750
V2 = 331360 / 750
V2 = 441.81 mL
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At which point is the slump block located?
Explanation:
At 4th point the slump block is located
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have a great day :)
It is point 2, for anyone who sees this is the future
What is the empirical formula for a compound that contains 17.34% hydrogen and 82.66% carbon?
CH2
C5H
C2H5
CH3
Answer:
C2H5
Explanation:
you first find the number of moles of both substances then divide by the lowest number in this case carbon was 1 and hydrogen was 2,515... then you multiply by a whole number which was 2 then it was now C2H5
A dead fish has washed up on the beach and is starting to decay. Which compound produces the unpleasant odor from the decaying fish?
A. pentane-1,5-diamine
B. hexane-1,5-diamine
C. hexane-1,6-dithiol
D. 2-pentanone
Answer:
A. Pentane- 1,5-diamine
Explanation:
I just did this in chemistry today
Answer:
The other person is correct.
Explanation:
You should give him brainiest.
14. A 500.0 ml flask contained O2 gas at 25.0°C at a pressure of 4.5 atm. What is the number
of moles in the flask?
Explanation:
3.Apply the ideal gas law: PV = nRT solving for n. Here you can use the pressure given in atm, but you must choose the 0.0821 atm L/mole K gas constant. Or you can change 4.5 atm to 3420 mm Hg and use the 62.4 mmHg L/mole K gas constant. You must change 500 ml to 0.5 L because both gas constants have units in L, and so the volume must be in liters so it can cancel out. And of course, you must change the temperature to Kelvin.
a. n = (4.5atm)(0.5L)
moliK)(298K) = 0.092 mole (0.0821 atmiL
b. 0.092mol 32g
⎛⎝⎜ ⎞⎠⎟ = 2.9 g
1mol
c. Remember that D = mass
vol so D = 2.9g
0.5L = 5.9 g/L
1. Explain the data. Is there any evidence that a reaction has occurred?
2. Does the conductivity increase or decrease?
3. What is the indicator of the number of ions in solution?
4. How does this evidence indicate that the reaction has occurred between ions?
5. The Ba(OH)2 dissociates as Ba+² +2 OH. H2SO4 dissociates as 2 H+ +SO4-2. Write a balanced equation for this reaction.
6. When the conductivity is at a minimum, what must be true about the amount of Ba(OH)2?
7. Why does it not conduct at a low point?
8. Why does it conduct more before and after this minimum point?
If anyone has even one answer to any of these, that'd be really helpful!! Thank you! ^^
The appearance of ions in solution makes a solution to conduct electricity.
What is conductivity?Conductivity refers to the flow of current through a solution.
1) There is an evidence that reaction has occurred because of the formation of a precipitate
2) The conductivity decreases as more H2SO4 was added.
3) The indicator of the number of ions in the solution is the current recorded.
4) This evidence indicates that a reaction has occurred because the formation of a precipitate decreases the current.
5) Ba(OH)2(s) ----> Ba^2+(aq) + 3OH^-(aq)
H2SO4(aq) ---> 2H^+(aq) + SO4^2-(aq)
6) When the conductivity is at the minimum, It means that the Ba(OH)2 is largely undissociated.
7) It does not conduct at a low point because there are no ions in solution.
8) It conducts more before and after this minimum point because of more ions in solution.
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Will it make a difference if we swap the anode and cathode in electroplating?
Answer:
▪ Will it make a difference if we swap the anode and cathode in electroplating?
➢ If we interchange the two terminals after electroplating then the ions deposited on the plate will move again towards their original position.
[tex]TextFromYourMrEx...[/tex]
#CarryOnLearning
Explanation:
if we change the two terminals after electroplatingthen the ions deposited on the plate will move again towards their original position...
HELP PLEASE FAST 100 POINTS
In any chemical reaction, the mass of the products must equal the mass of the reactants. The mass of product B is the same as the combined mass of Reactant A and H₂O.
Answer:
sh5barch shougi
Explanation:
Kl (aq) + _Pb(NO3)2 (aq) → __ KNO3 (aq) + _Pbl2 (s)
3. What is the total pressure of a mixture of nitrogen and hydrogen, in atm, if the
partial pressure of nitrogen is 509.7 mmHg and the partial pressure of hydrogen is
630.3 mmHg?
Answer:
As per Dalton's law of Partial pressure,
The total pressure of a mixture of gases is equal to sum of partial pressure of individual components of the mixture.
So, P=P_H+P_N+P_WP=P
H
+P
N
+P
W
\implies 864\ mm=220\ mm+410\ mm+P_W\implies⟹864 mm=220 mm+410 mm+P
W
⟹ P_W=864-630=234P
W
=864−630=234 mm of Hg.
Explanation:
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SOMEONE HELP ME PLEASE
Convert the answer above to Kelvin
Answer:
313.15
Explanation:
A sample of a gas in a rigid container at 35.0oC and 1.85 atm has its temperature increased to 48oC. What will be the new pressure?
Answer:
Standard pressure is always 1.00atm. Example #1: How many moles of oxygen will occupy a volume of 2.50 L at STP? Standard temperature = 273K law.
Explanation:
Answer:
2.07 atm
Explanation: