Explanation:
Tha Symbol of gold is Au.
Answer:
symbol of gold is Au
------------------------------------------------
Identify the two acids and the two bases out of the 5 chemicals below: NaOH/ HCI /H2SO4/ Ca(OH)2 /NaBr *
Answer: NaOH and Ca(OH)2 are bases. HCl and H2SO4 are acids
Explanation:
Create a visual model of an ionic substance (salt) dissolving in water and a covalent substance (sugar) dissolving in water.
Answer:
see image
Explanation:
let me know if you have any questions
Two firefighters are trying to break through a door. One firefighter is heavy, and the other is light. If they run at the same speed, which one is more likely to break through?
Answer:
the heavy one
Explanation:
the heavy one because heavy things and break things and the light one can't
Why do electrons become delocalised in metals?
Answer:
All of the 3s orbitals on all of the atoms overlap to give a vast number of molecular orbitals which extend over the whole piece of metal. The electrons can move freely within these molecular orbitals, and so each electron becomes detached from its parent atom. The electrons are said to be delocalized.
Explanation:
I hope you understand
How many pairs of electrons are shared by adjacent carbon atoms in an alkane?
Answer:
one
Explanation:
HELP ASAP!
Which statement describes one way that nuclear fission differs from nuclear
fusion?
Answer:
answer is A- nuclear fission is too hard to control for use in practical applications
Answer:
O C. Nuclear fission is used to produce electrical power.
Explanation:
Find the total pressure (in atm) of a mixture that contains 3 gases with the following partial pressures. Gas A is 4.2atm, Gas B is 780 mmHg, Gas C is 250.00kPa
Answer: The total pressure of given mixture that contains 3 gases is 7.68 atm.
Explanation:
Given: Partial pressure of gases is:
Gas A = 4.2 atm
Gas B = 780 mm Hg
Convert mm Hg into atm is as follows.
[tex]1 mm Hg = 0.00131579 atm\\780 mm Hg = 780 mm Hg \times \frac{0.00131579 atm}{1 mm Hg}\\= 1.02 atm[/tex]
Gas C = 250 kPa
Convert kPa into atm as follows.
[tex]1 kPa = 0.00986923 atm\\250 kPa = 250 kPa \times \frac{0.00986923 atm}{1 kPa}\\= 2.46 atm[/tex]
Total pressure is the sum of partial pressures of gases present in the mixture.
Therefore, total pressure of given mixture is calculated as follows.
[tex]P_{total} = P_{A} + P_{B} + P_{C}\\= 4.2 atm + 1.02 atm + 2.46 atm\\= 7.68 atm[/tex]
Thus, we can conclude that the total pressure of given mixture that contains 3 gases is 7.68 atm.
Copper (II) reacts with silver nitrate in a single displacement reaction. How many grams of copper are needed to react with 510 grams of silver nitrate?
Ms. Kastenberg spilled a bottle of paint outside in the sun. Over time, the paint dried. This is because:
A
The paint reflected the energy from the light
B
The light was too strong for the paint
с
The sun removed energy from the paint
D
The paint absorbed the energy from the light
Answer:
I believe that the answer is the paint absorbed the energy from the light
Explanation:
The paint dried because the paint absorbed the energy from the light and the correct option is option D.
What is absorption of light?Light absorption is the process in which light is absorbed by matter and converted into energy. In an atom, electrons vibrate at a specific frequency – this is called the natural frequency.
If a wave of light hits a material in which the electrons are vibrating at the same frequency as the wave of light, the electrons will absorb the energy and convert it into vibrational motion.
This is why objects have different colours – different materials’ electrons will vibrate at different rates, and therefore absorb different frequencies of light.
Therefore, the paint dried because the paint absorbed the energy from the light and the correct option is option D.
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What is the difference between strong and weak acids
Answer:
Weak acids don't fully dissociate in the solvent, whereas strong acid do.
Explanation:
Answer: Strong acids dissociate fully in water to produce the maximum number of H + ions. ... Weak acids, such as ethanoic acid (CH 3COOH), do not fully dissociate
Explanation:
Los ácidos fuertes se disocian completamente en agua para producir el máximo número de iones H +. ... Los ácidos débiles, como el ácido etanoico (CH 3COOH), no se disocian completamente
Consider the following redox reaction:
2Cr(OH)3 + ClO3- + OH- CrO42- + 2 H2O
A) The reaction is balanced and occurred in an acidic environment
B) The reaction is unbalanced and occurred in a basic environment
C) The reaction is balanced and occurred in a basic environment
D) The reaction is unbalanced and occurred in an acidic environment
Answer:
kkahshsi
Explanation:
jsjysvs7xbzj sis zyhzoa w sizndkzjaos skzn8zjjzhxlx zjzjzjhzbsjz sksnzinsizjdi sis7gshsjsjsjiajwiwiw iajaja naskoh oe
VA ROGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
Answer:
Pppppppppppppppppppppppppppppp
Water absorbs energy when it undergoes___
A. freezing
B. deposition
C. condensation
D. melting
Answer:
d. melting
As heat enters the water the particles move much faster, bumping into each other. Therefore, more heat means more energy!
Hopesthis helps!
Which important historical figure did Berthollet teach and travel with?
Answer:
Napoleon Bonaparte
Explanation:
Napoleon Bonaparte was pleased by Berthollet's accomplishments and hired Berthollet in 1798 for his expedition in Egypt, wherein he founded the Institut d'Egypte. He has become the chief scientist at the Institut de France following his homecoming to Paris, and he set up a private laboratories at his country residence in Arcueil on the outskirts of The capital.
Is Zinc sulfide ionic or covalent?
Which describes the greatest difference between gases and solids?
A. Solids feel softer than gases.
B. Gases are darker colors than solids.
c. Solids have stronger odors than gases.
D. Gases usually weigh less than solids.
Answer:
D)Gases usually weigh less than solids.
Answer:
D) Gases usually weigh less than solids
Explanation:
Gases don't have weight and solids do which automatically makes gases lighter because they don't have a mass like a solid.
Name the following compound
CH 3 – CH 2 – CH = CH – CH 2 – CH 3
Answer:
hex-3-ene
remember the least number rule and since the double bond lies at 3rd C-atom from either ways, the compound is named hex (six carbon atoms) -3(position of double bond)-ene (primary suffix for unsaturated organic compound where any two carbons have double bond). hex-3-ene.
if you have any doubt, please feel free to ask :-))
13 : 22
MI SEC
23. Which of the following solutions will reach dynamic equilibrium?
a Supersaturated solution
b Unsaturated solution
C Saturated solution
d None of the above
Answer:
C
Explanation:
The solution that will reach dynamic equilibrium is a saturated solution. The correct option is C.
What is an unsaturated solution?A chemical solution in which the solute concentration is less than its equilibrium solubility is known as an unsaturated solution.
The solvent dissolves the entire solute.
When a solute (typically a solid) is mixed with a solvent (commonly a liquid), two reactions take place at the same time.
Thus, the correct option is C, the saturated solution.
Learn more about saturated solutions.
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2C2H6 + 7O2 → __CO2 + 6H2O
What coefficient will need to be placed in the blank in order for the following equation to be correctly balanced?
A.
1
B.
3
C.
4
D.
7
Answer:
From the Combustion formula of Organic Compounds....
Exactly 4 Moles of CO2 would make the equation balanced
So
OPTION C
4MOLES
74g of Ca(OH)2 (74 g/mol) in 340 ml solution
Answer:
This question is asking to calculate the molarity of the solution based on the information provided.
The answer is 2.94M
Explanation:
Molarity of Ca(OH)2 solution = number of moles (n) ÷ volume (V)
Using the formula below to calculate number of moles of Ca(OH)2.
mole = mass/molar mass
Molar mass of Ca(OH)2 = 74 g/mol
mole = 74g/74g/mol
mole = 1mol
Volume of Ca(OH)2 solution = 340ml = 340/1000 = 0.340 L
Molarity = 1/0.340
Molarity = 2.94M
Which of the following is most helpful for identifying an organism using a dichotomous key?
Its average lifespan
Its sources of food
Its habitat
Its physical structures
Answer:
Its physical structure
Explanation:
The fungus known as “chicken of the woods” grows on trees. the fungus breaks down the tree and gets its nutrients that way. the tree decays gets weak and becomes very vulnerable to extreme weather.
Benefits, harmed, parasitism
Answer:
the answer is harmed
Explanation:
Brainliest plzzzzzzzzzz
3. Balance the chemical equations
Answer:
A) BaCl2 + 2NaOH → Ba(OH)2 + 2NaCl
B) H2SO4 + 2KOH → K2SO4 + H2O
C) K2O3 + 2HCl → 2KCl + H2O + CO2
D) 2FeSO4 → Fe2O3 + SO2 + SO3
E) 2NaNO3 → 2 NaNO2 + O2
Explanation:
Answer:
A) BaCl² + 2NaOH → _Ba(OH)² + 2NaCl
B) H²SO⁴ + 2KOH → _K²SO⁴ + H²O
C) K²CO³ + 2HCl → _KCl + H²O + CO²
D) 2FeSO⁴ → _Fe²O³ + _SO² + _SO³
E) 2NaNO³ → 2NaNO² + _O²
Please help me!! And please no links!!!!
Write a clear scientific explanation of how and why the water ended up on the mirror and not in the tub. Be sure to include scientific vocabulary (including any phase changes that occurred and the role of kinetic energy).
Vocabulary words-
Condensation
Gas
Heat
Kinetic energy
Liquid
Steam
Vaporization
Water vapor
Answer:
The water was hot it turned into steam then turned to water vapor and the got attached to the glass and as the gas got attached the glass and it built up then became water again. As the vaporization was happening the gas was moving hence the energy building up.
Explanation:
What change would shift the equilibrium system to the left?
A(g) + B(s) + Energy = 309) (3 points)
Adding more of gas C to the system
Heating the system
Increasing the volume
Removing some of gas C from the system
Answer:
C
Explanation:
sorry if its wrong but i think its right
Heating the system will shift the equilibrium system to the left.
The correct option is B.
What is equilibrium?
Chemical equilibrium is a state where no net change in the amounts of reactants and the products occurs during a reversible chemical reaction.
A reversible chemical reaction happens when the products react with the original reactants as soon as they are generated.
On a treadmill, you are walking continuously but not going anywhere, which can be said as equilibrium.
Thus, the correct option is B.
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An atom of element X has an atomic number of 11 and a mass number of 23. .
a) What is the definition of atomic number?
b) How many protons, electrons and neutrons are in this atom?
c) A different atom of X has an atomic number of 11, but a mass number of 24. Give a
name for these two forms of X.
d) Would these two atoms have similar chemical properties? Give a reason for your
answer.
Answer:
ssaasasasassdsdsdafdftrga*b*y/a la 3
Explanation:
Answer:
a) the number of protons in an atom
b) 11 protons, 11 electrons and 12 neutrons.
c) Isotope
d) yes, they still have the same number of protons and electrons.
Explanation:
b) Number of neutrons = mass number - atomic number
Atoms have the same number of electrons and protons
c) isotopes are atoms with the same number of protons but a different number of neutrons.
Hope this helped !
Calculate the volume that 12.5 g of carbon dioxide gas will occupy at a temperature of 45 degrees Celsius and a pressure of 1.20 atm
Answer:
[tex]V=6.2L[/tex]
Explanation:
Hello there!
In this case, according to the given information, it is possible for us to realize that we need to use the ideal gas equation in order to calculate the volume of CO2 but firstly calculating the moles:
[tex]n=\frac{12.5g}{44.01g/mol}=0.284mol[/tex]
Then, we proceed with the ideal gas equation to solve for volume:
[tex]PV=nRT=\\\\V=\frac{nRT}{P}\\\\V=\frac{0.284mol*0.08206\frac{atm*L}{mol*K}*(45+273.15)K}{1.20atm}\\\\V=6.2L[/tex]
Regards!
bacterial cells.
Which label belongs in the area marked animal?
nucleus
DNA
cell wall
ribosomes
Answer:
I believe it would be (nucleus)
If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?
Answer: As a result an increase in kinetic energy also happens.
Explanation:
Potential energy is the energy occupied by an object or substance due to its position.
Kinetic energy is the energy occupied by an object of substance due to its motion.
If the kinetic and potential energy in a system are equal and then an increase in potential energy will occur.
As a result, there will also occur an increase in kinetic energy also.
Thus, we can conclude that as a result an increase in kinetic energy also happens.
what is the name of this molecule?
A. 2-pentyne
B. cis-2-pentene
C. 3-methylpentane
D. Pentane
As the compound has alkyne as the functional group the correct option is A.
Functional group is defined as a substituent or a group of atoms or an atom due to which chemical reactions are carried out. Each functional group will react in the same way regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.
The reactivity of functional group is increased by making modifications in the functional group .Atoms that are present in functional groups are linked to each other by means of covalent bonds.They are named along with the organic compounds according to IUPAC nomenclature.
As the compound has alkyne as the functional group the correct option is A.
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