Answer:
To what temperature must a sample of helium gas be cooled from 22.2 degrees C to reduce its volume from 1.00L to 100cm3 ?
Explanation:
What is the isotope notation of selenium
Answer:
It is Se.
hope this helps.
.
Rocks containing _____ have magnetic properties.
lodestar
iron
magnesia
magnetite
Answer: Iron
Explanation: There are little minnerals that make it magnetic.
Which property of liquids creates a meniscus in
glass tubes as seen in the picture?
O adhesion
O
cohesion
O melting point
polarity
ANSWER IS ADHESION
The property of liquid that create meniscus in glass tubes is Adhesion
What is Adhesion?Adhesion is the property of liquid in which two different or disimillar molecules or surfaces to cling to each other. For example, solids have a very high cohesive properties and this make them not to stick to the surfaces they come in contact.
Therefore, Adhesion property of liquids creates a meniscus in glass tube.
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Answer:
Adhesion
Explanation:
If 4.65 LL of CO2CO2 gas at 22 ∘C∘C at 793 mmHg mmHg is used, what is the final volume, in liters, of the gas at 35 ∘C∘C and a pressure of 743 mmHg mmHg , if the amount of CO2CO2 does not change?
Answer:
About 7.9 L.
Explanation:
We can utilize the ideal gas law. Recall that:
[tex]\displaystyle PV = nRT[/tex]
Because the amount of carbon dioxide does not change, we can rearrange to formula to:
[tex]\displaystyle \frac{PV}{T}= nR[/tex]
Because the right-hand side stays constant, we have that:
[tex]\displaystyle \frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2} = nR[/tex]
Hence substitute initial values and known final values:
[tex]\displaystyle \begin{aligned} \frac{(793\text{ mm Hg})(4.65 \text{ L})}{(22 \text{ $^\circ$C})} & = \frac{(743 \text{ mm Hg})V_2}{(35\text{ $^\circ$C})} \\ \\ V_2 & = 7.9\text{ L}\end{aligned}[/tex]
Therefore, the final volume is about 7.9 L.
A 20 g gold coin is heated from 10°C to 50°C ( CAu is 0.13 J/g−°C ). What is the △H ? (Hint: Remember ΔH=q, so if you solve for q, you might have your answer!)
Now
[tex]\\ \rm\rightarrowtail Q=mc\delta T[/tex]
[tex]\\ \rm\rightarrowtail Q=20(40)(0.13)[/tex]
[tex]\\ \rm\rightarrowtail Q=800(0.13)[/tex]
[tex]\\ \rm\rightarrowtail Q=104J[/tex]
Why is fusion only possible with small nuclei?
Answer:
The measurement of the mass of nuclei has revealed that the mass of the constituent protons and neutrons is more than the mass of the nucleus
Explanation:
Hope this helps ya have a nice day
What is the mass of 15100 mL of oxygen gas at STP?
Answer:
02 has a mass of 1.78 g.
Explanation:
hope this helps
What type of energy transformation takes place during cellular respiration?
Use complete sentences to explain how energy is conserved during cellular respiration. (10 points)
Answer:
chemical energy transgormation takes place during cellular respiration
What are the names of the positive and negative electrodes of an electrolytic cell?
In an electrolytic cell, the positive electrode is known as anode, while the negative electrone is known as cathode.
What is an electrolytic cell?This is a type of cell that requires external electrical energy to work or to trigger a chemical reaction. This is only possible trough two types of electrodes: anode and cathode.
What is the difference between anode and cathode?The key differene is the type of charge, cathodes are negatively charged, while anode are positively charged.
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Magnetic field lines appear _____.
A farthest apart at the poles where the magnetic field is strongest
B closest together at the poles where the magnetic field is weakest
C closest together at the poles where the magnetic field is strongest
D farthest apart at the poles where the magnetic field is weakest
Answer:
A
Explanation:
A farthest apart at the poles where the magnetic field is strongest
.
Which is not a property of magnets?
AThey point north when allowed to swing freely on a string.
B They attract or repel other magnets.
C Their force of attraction is strongest in the middle of the magnet.
D They attract iron and other materials containing iron.
Explanation:
Their force of attraction is strongest in the middle of the magnet.
5.26 KG of nitrogen monoxide and 7.64 milligrams of oxygen are combined with mass of nitrogen dioxide is formed
Answer:
NO + O2 NO2
Explanation:
How would I name this?
Provide the correct IUPAC name for the compound shown here.
The IUPAC name of the compound shown in the image is 4-bromo butyne.
What is IUPAC?IUPAC is a body in chemistry that stands for International Union of Pure and Applied Chemistry.
IUPAC functions in the naming of organic compounds in chemistry.
According to the image in this question, the functional group of the compound is a triple carbon bond meaning that it is an alkyne.
Bromine is attached to the fourth carbon, hence, the IUPAC name of the compound is 4-bromo butyne.
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Please help!!! 25 points!!!
This image illustrates how different species of warblers are able to survive using different parts of the tree through habitat partitioning. Why would these warblers be able to survive and thrive using the same trees?
A) it reduces interspecific competition
B) it reduces intraspecific competition
C) it increases interspecific competition
D) it increases intraspecific competition
Answer:
C.
Explanation:
✿————✦————✿————✦————✿
Why C? Because-
Spell out the full name of the compound?
A type of reaction that gives off energy is called
Answer:
exothermic
Explanation:
in exothermic reactions, more energy is released when the bonds are formed in the products than is used to breake the bonds in the reactants.Determine the difference between archaea and bacteria. (1 point)
All bacteria are unicellular organisms, while some archaea are multicellular.
Archaea live in extreme environments, while bacteria can be found in most places on Earth.
Bacteria and archaea have different shapes.
Archaea is the domain of life that includes the plant and animal kingdoms, while the bacteria domain includes fungi and protists.
Answer:
I have this work and I'm in 5th grade
Explanation:
Answer:
Archaea live in extreme environments, while bacteria can be found in most places on Earth.
Explanation:
Doing a the test now and this is the answer.
Find the empirical formula of a compound that contains 34.97 g of Fe and 15.03 g of O.
PROBLEM SOLVING: Show pertinent solution and underline/put in a box your final answer. Use the space provided. 15 pts
1. Balance the ff skeleton reactions and identify the oxidizing and reducing agents: 6 pts
a) O2(g) + NO(g) + H2O(l) → NO3-(aq) + H+(aq)
b) CrO42–(aq) + H2O(l) + Cu(s) → Cr(OH)3(s) + Cu(OH)2(s) + OH–(aq)
2. A cell can be prepared from copper and tin. What is the E°cell for the cell that forms from the
following half-reactions? 3 pts
Cu2+(aq) + 2e- Cu(s); E° = 0.34 V Sn4+(aq) + 2e- Sn2+(aq); E° = 0.13 V
Based on the redox equations;
O2 is the oxidizing agent while NO is the reducing agentCu is the reducing agent while CrO_4{^2} is the oxidizing agentThe emf of the cell, E°cell of the cells formed from the half-reactions is 0.21 V
What are reducing and oxidizing agents?Reducing agents are substances which donates electrons and are oxidized in a redox reaction.
Oxidizing agents are substances which accept electrons and are reduced in a redox reaction.
From the given the redox equations:
a) O_2(g) + NO(g) + H_2O(l) → NO_3^{-}(aq) + H^{+}(aq)
O_2 is the oxidizing agent while NO is the reducing agent.b) CrO_4^{2-}(aq) + H_2O(l) + Cu(s) → Cr(OH)_3(s) + Cu(OH)_2(s) + OH^{-}(aq)
Cu is the reducing agent while CrO_4^{2-} is the oxidizing agent.2. The emf of the cell, E°cell = E°red - E°oxi
In the cell, copper is reduced while tin is oxidized.
E°cell = (0.34 - 0.13) V
E°cell = 0.21 V
Therefore, the emf of the cell, E°cell is 0.21 V
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To gain an understanding of mixture and the concept of separate of mixture,prepare an article to help feeding mother in your community to find the element of iron in iron-fortified breakfast cereal flakes .through this article the mother should be able to see how the iron compenent of this mixture (cereal) retains its properties and can thus be separated by physical means
Answer:
you ask questions that are too hard!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
Explanation:
Which is true of magnetic fields?
A.
They are strongest at each pole, where the field lines are closest together.
B.
They are strongest at the north pole, where the field lines are closest together.
C.
They are strongest at the center of the magnet, where the field lines are farthest apart.
D.
They are strongest at each pole, where the field lines are farthest apart.
Magnetic lines of force are are strongest at each pole, where the field lines are closest together.
What are magnetic fields?A magnetic field is the region around a magnet where the influence of the magnet can be felt. The magnetic line of force show the intensity as well as the direction of the magnetic field.
The fact that is true for all magnetic fields is that they are strongest at each pole, where the field lines are closest together.
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Go why?yes but why but no sense so help but yes by hypothesis
Answer:
follow hypothesis bud
Explanation:
yep
Find the acceleration of the 2 kg block in the following diagram. ( Hint find the net force!)
The acceleration of the block will be -2 m/s² in the backward direction.
What is force?
Force is defined as the product of mass of the body and the acceleration with which it is moving. Mathematically -
F = ma
It is a vector quantity. In the three dimensional coordinate system, the force vector can be resolved as -
[F] = F[x] a[x] + F[y] a[y] + F[z] a[z]
Given is a diagram in which two forces are acting on a block.
We can write -
Force 1 on block [F1] = 4 a[x]
Force 2 on block [F2] = 8 (- a[x]) = - 8 a[x]
Resultant of forces [F] = [F1] + [F2] = 4 a[x] + ( - 8 a[x]) = - 4 a[x]
Now, we know that -
F = MA
A = F/M
In vector form, acceleration will be -
[A] = - 1/m × (4 a[x])
[A] = -1/2 × (4 a[x])
[A] = - 2 a[x]
Therefore, the acceleration of the block will be -2 m/s² in the backward direction.
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If you start with 10 carbon and 3 Hydrogen, what will you end with?
Hydrocarbons are composed of hydrogen and carbon only and the hydrocarbon produced will differ according to their mole ratio.
What are hydrocarbons?Hydrocarbons are compounds composed only of carbon and hydrogen.
Hydrocarbons are very large families of compounds which have a common property of being combustible.
Hydrocarbons include:
alkanesalkenes and alkynesThe mole ratio of the carbon to hydrogen in each type of hydrocarbon differs.
Therefore, starting with 10 carbon and 3 Hydrogen, the hydrocarbon produced will differ according to their mole ratio.
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How should the solute and solvent be mixed in the container?.
Fill to the 250-mL mark with water after mixing a tiny amount of water with the solute to dissolve it.
The more solute is broken down in solution the less conductive the solutions is. True or False
Answer:
False.
Explanation:
If the answer to this question was true, then that would mean that the more the solute is broken down, the less it'll dissolve... and everyone know that this doesn't make sense. I hope I explained this is an easy manner so you could understand! Good luck! :)
The more solute is broken down in solution the more conductive the solutions is and the statement is False.
What effects the conductive nature of a solution?
Conductivity depends upon solvation of ions present in solution. Greater the solvation of ions, lesser is the conductivity.
Solvation is the process in which molecules of a solvent attract the particles of a solute.
The main forces in solvation are ion-dipole and hydrogen bonding attractions.
The more concentrated a solution is, the greater the conductivity measured (if the solute is a conductor in solution). This is because the higher the concentration of the solute, the more ions will be available to carry electric charge.
Therefore, the more solute is broken down in solution the more conductive the solutions is and the statement is False.
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Explain how humans get muscle cramps
Answer:
Humans get muscle cramps when they start sport movemement wih out training and there is a store of calorie and amino acids so when it heated fastly there were some disease like muscle cramps
Balance the following equation. (20 pts)
Answer:
2Cl (aq) + Pb (aq) -> PbCl² (s)
Explanation:
What is represented in the image?
A: a space-filling model
B: a ball-and-stick model
C: a chemical formula
D: a structural formula
Answer:
A structural formula is shown, making the answer D.
(2) 8.1.3 Write down the structural formula of alcohol used in this reaction.
Answer:
-OH
Explanation:
Alcohols generally have the structural formula OH
for example, ethanols structural formula is C2H5OH