Answer:
4 shared electrons
Explanation:
There are 4 shared electrons in the lewis structure of h2o2.
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
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.What is the isotope notation of selenium
Answer:
It is Se.
hope this helps.
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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Which of the following is the primary use of land in the United States?
Question 1 options:
Pasture/range
Forest
Cropland
Urban
Answer:
pasture/range
Explanation:
this is because more than 1/3 of the country's land is being used for this mean alone.
Answer: Forest
Explanation: The largest percentage of land use in the United States is for forests.
Which bond links amino acids together?
glycosidic bond
hydrogen bond
phosphodiester bond
peptide bond
Answer:
Peptide Bonds
Explanation:
Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.
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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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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Procedure for Lab: Enthalpy ?
I have a lab on Edge that's about Enthalpy. The assignment is called " Lab: Enthalpy". If someone could help me with the procedure of the lab, that would be nice. (I don't need the data table, just the procedure.)
The enthalpy refers to the thermodynamic characteristics that have chemical systems associated with their internal energy.
What is enthalpy?The enthalpy refers to the thermodynamic features of the chemical systems associated with the energy of such systems.
Enthalpy is used to estimate the ability of the system to perform work and release energy in the form of heat.
It is well known that different types of chemical reactions may exhibit different enthalpies, which can be estimated by the internal energy, pressure of the system and volume.
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Answer:
Here you are <3
Explanation:
I attached the one I just submitted
(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
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
Balance the following equation. (20 pts)
Answer:
2Cl (aq) + Pb (aq) -> PbCl² (s)
Explanation:
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.
______ contributes to the nitrogen cycle by removing nitrogen from the air and converting it into a form that is usable by plants.
plants
earthworms
fungi
bacteria
The complete statement is "Bacteria contribute to the nitrogen cycle by removing nitrogen from the air and converting it into a form that is usable by plants." This is further explained below.
What is Bacteria?Generally, Bacteria are mono-celled tiny creatures that can be beneficial. Bacteria are germs with a simpler cell structure than many other creatures.
In conclusion, Bacteria contribute to the nitrogen cycle by removing nitrogen from the air and converting it.
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Answer:bacteria
Explanation:
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 is fission different than alpha or beta decay?
Fission is when the parent atom splits into two daughter products. Whereas atom with a mass number is lower by 4 and an atomic number is lower by 2.
Is nuclear fission alpha or beta?Fission outcomes emit beta radiation, while actinides mainly emit alpha radiation. Many of each also radiate gamma radiation.
The beta decays form an isobaric, fission-product decay chain for each mass number.
Thus, Fission is when the parent atom splits into two daughter products.
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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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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-
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]
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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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.
.
Rocks containing _____ have magnetic properties.
lodestar
iron
magnesia
magnetite
Answer: Iron
Explanation: There are little minnerals that make it magnetic.
.
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.
What is not a part of the digestive system
A. Large intestine
B. Small intestine
C.Trachea
D. Esophagus
Answer:
Trachea is not the part of digestive system
Explanation:
Trachea is the part of the respiratory system
Find the empirical formula of a compound that contains 34.97 g of Fe and 15.03 g of O.
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
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
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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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.