CHEMISTRY HIGH SCHOOL

What are signs that a chemical reaction has accrued

Answers

Answer 1
Answer:

Answer:

Burns, rashes, types of sickness, etc

Explanation:
Answer 2
Answer: (Change in color,change in odor,formation of precipitation )hope this helps

Related Questions

An atomic nucleus must contain at least one neutron or else the force of attraction of the electron(s) will collapse the atom. True/false
as a result of the gold foil experiment it was concluded that an atom (1) contains protons, neutrons, and electrons(2)contains a small, dense nucleus(3)has positrons and orbitals (4)is a hard and invisible sphere
What is the mass, in grams, of 6.82 L of nitrogen monoxide at STP? R = 0.0821 L atm / mol K
With a 1.0–2.0 Sv dosage of radiation, an individual can expect to A. die.   B. hemorrhage.   C. see no immediate effect.   D. have nausea and hair loss.
Identify whether the following is an example of qualitative or quantitative data. the taste of an apple:

Muscles perform what type of energy transformation?

Answers

Muscles perform energy transformation from chemical energy to kinetic energy which is very evident as we do our day to day activities. Hope this answers the question. Have a nice day. Feel free to ask more questions. Thank you.

How is electron movement related to covalent bonding in ammonia, NH3?A) Electrostatic sharing in a sea of electrons around the atoms allows bonds to form.
B) The atomic orbitals overlap and electrons are shared between the atoms forming bonds.
C) A transfer of electrons forms ions which are electrostatically attracted forming bonds.
D) Orbital exchange occurs between the atoms to redistribute the electrons and form bonds.

Answers

Answer:

B

Explanation:

A) The sea of electrons only happen with metalic bond, a bond with two metalic elements.

B) As both elements in ammonia (N and H) are non-metals we don't observe an transfer of electrons, both elements share the number of electrons needed to stablize it (3 electrons for the N and 1 for the H).

C) To have a transfer of electrons, we need a bond between a metal and a non-metal, in this case, N and H are non-metals, so this doesn't happen.

D) The electrons are shared, only the electrons nothing happens between the orbitals.

How is electron movement related to covalent bonding in ammonia, NH3?

A) Electrostatic sharing in a sea of electrons around the atoms allows bonds to form. 
B) The atomic orbitals overlap and electrons are shared between the atoms forming bonds. 
C) A transfer of electrons forms ions which are electrostatically attracted forming bonds. 
D) Orbital exchange occurs between the atoms to redistribute the electrons and form bonds.

The electron movement related to covalent bonding in ammonia, NH3 is The atomic orbitals overlap and electrons are shared between the atoms forming bonds. The answer is letter B.

“The element vanadium is a solid at room temperature, and its density is 6110 kilograms per meter cubed. Its melting point is 1910 degrees Celsius.” Which correctly evaluates the statement? not reliable because opinions are presented, reliable because testable facts are presented, not reliable because it is very brief ,reliable because metric units are used

Answers

I think the correct answer is the second option. The statement pertaining to the properties of the element vanadium is reliable because the facts presented are testable or can be verified by doing experimentation. Also, nowadays, many studies are present that contains properties of almost anything.

Answer:

B: reliable because testable facts are presented

Explanation:

give the other guy brainliest he got here first

What is the best description of the Bohr model of the atom?A.)The atom consists of a positively charged material with negatively charged electrons embedded within it.
B.)The atom consists of a nucleus with electrons orbiting randomly around it.
C.)The atom consists of a nucleus with electrons orbiting at specific energy levels. Absorbed photons cause electrons to jump between energy levels.
D.)The atom consists of a nucleus surrounded by a region containing electrons. Electrons cannot be located exactly within this region, but the probability that they will be found in an area can be stated.

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The best description of the Bohr model of the atom is that the atom consists of a nucleus with electrons orbiting at specific energy levels. Absorbed photons cause electrons to jump between energy levels. The answer is letter C.

Which statement describes a physical change?a. A carton of milk souring
b. A piece of silver flatware tarnishing
c. Dry ice subliming into carbon dioxide
d. Two clear solutions forming a precipitate when mixed

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The correct answer C. Dry ice subliming to carbon dioxide is an example of a physical change. This type of change is when only the appearance changed but the substance is still the same. It is the opposite of a chemical change where a new substance is formed from this change.

Which of the following is not a type of adaptation? A. Functional B. Mechanical C. Behavioral D. Structural

Answers

B. Mechanical-  is NOT a type of adaptation
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Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil?
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