During a chemical reaction, no atoms are destroyed or created. The change occurred in the given reaction is the regrouping of atoms of the reactants.
What is a chemical change?A change by which a bond between two atoms is created or breaks called chemical changes. All chemical and biological reactions are example of chemical changes.
According to law of conservation of mass proposed by Antoine Lavoisier mass is neither created nor destroyed. Thus the total mass in a reaction is conserved.
The mass in reactant side must be equal to the mass in the product side in a balanced reaction. Thus no atoms crated or destroyed.
Therefore, option A is correct, that is atoms are regrouped between reactants during a reaction to get new products with same mass as that in product side.
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Which form of energy is stored chemical energy and example of?
Kinetic energy
Potential energy
Gravitational energy
Powered energy
Answer:
D
Explanation:
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Which phrase describes the parts of a solution but NOT the parts of a heterogeneous mixture?
A.) evenly mixed
B.) chemically bonded
C.)always a single type of atom
D.) easily visible with a unaided eye
Answer:
c
Explanation:
what is the volume of a marble that has a mass of 3.g and a Density of 2.7 g/ml ?
make sure to round to the nearest tenth
Answer:
1.111 or since you want me to round 1.1 if not right let me know please.
Explanation:
Answer:
1.1
Explanation:
all you have to do is divide the mass by density to get the volume yurr
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Mitochondria are very important to the cell and are sometimes called the powerhouses of the cell. Imagine that a certain virus penetrates a cell and reaches the mitochondria. Predict what would happen to the cell if the virus were able to destroy all of the cell's mitochondria.
A. The cell would eventually die without the ATP that it needs for activities
B. The cell would be unaffected by the loss of mitochondria and will continue to function normally
C. The cell would rapidly produce more proteins
D . The cell would multiple uncontrollably because there is nothing to stop it anymore.
Answer:
b
Explanation:
What's a compound?
What's an element?
whatss a mixture?
Answer:
Compound: any substance composed of identical molecules consisting of atoms of two or more chemical elements.
Element: is a pure substance which cannot be broken down by chemical means.
Mixture: is a substance which consist of two or more elements or compounds not chemically combined together.
The phase of matter can be changed by:
a) increasing temperature
b) decreasing mass
c) increasing volume
d) all of the above
Answer: A
Explanation: Mass and volume is the amount, amount doesn’t make the phase of a matter change.
help please, thank you !!
Answer:
5
Explanation:
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The graph shows the distance traveled by a ball over a certain amount of time. According to the graph, between 2 and 4 seconds the ball was-
A. traveling at a constant speed.
B. increasing its speed.
C. changing its direction.
D. remaining at rest.
Carlos is using the following images of a coal plant and a barbecue for his science investigation about chemical energy. Based on his observations, which statement most likely describes the conclusion of his investigation?
a coal plant
a barbecue
The images show examples of chemical energy being converted into heat and electrical energy.
The images show examples of mechanical energy being converted to heat energy.
The power plant and the barbecue convert electrical energy into chemical energy.
The power plant and the barbecue store heat energy and convert it to chemical and electrical energy.
I believe it is the first one, please correct me if I'm wrong.
Answer:
A
Explanation:
Why are gamma rays not affected by a magnet as they pass over it?
a) Gamma rays do not have enough mass to be affected.
b)Gamma rays do not have the right electrical charge to be affected.
c) Gamma rays are composed of only energy.
d) Gamma rays move too fast for anything to affect their pathway.
I think it's B
I hope I helped
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An atom of gold with 79 protons, 79 Electrons and 118 neutrons would have a mass number of....
A) 39
B) 158
C) 197
D) 276
Answer:
C
Explanation:
An atom of gold with 79 protons, 79 Electrons and 118 neutrons would have a mass number of 197 gold. Therefore, option C is correct.
What is mass number ?The total number of protons and neutrons in an atomic nucleus is known as the mass number, often known as the atomic mass number or nucleon number. In atomic mass units, it is roughly equivalent to the atom's atomic mass.
Because it indicates the mass of the entire number of protons and neutrons in an element, the mass number of an element is so named. The atomic number and atomic mass of an element are typically listed in periodic tables along with the chemical symbols for each element.
The third element in the periodic table's eleventh column is gold. It is under the transition metal category. The most common isotope of gold has 118 neutrons and 79 protons together with 79 electrons.
Thus, option C is correct.
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