In a chemical reaction, mass is conserved means what

QUESTION POSTED AT 14/02/2020 - 02:04 PM

Answered by admin AT 14/02/2020 - 02:04 PM

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
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Related questions

QUESTION 2 Which of the following is a stage in the life cycle of a population? growth stability decline all of the above QUESTION 3 ______ environmental factors for plants include light. Biological Physical Chemical all of the above


Question 2. The correct answer is "all of the above".

Question 3. The correct answer is "Physical"


Question 2. According to ecological terms, the life cycle of a population describes the different phases that a group of individuals go through from its growth to its death. The phases of the life cycle include: "growth", when the resources exceeded the number of individuals; "stability", when the resources are enough for the number of individuals; and "decline", when the resources are not enough for the number of individuals.

Question 3. The light is one of the most important physical environmental factors that affects a plant's growth. Light is considered a physical factor because is an abiotic factor that is inherent of the environment, such as sound and temperature.

ANSWERED AT 28/02/2020 - 03:57 PM

QUESTION POSTED AT 28/02/2020 - 03:57 PM

Jimmy and Jenny have designed an experiment to test how termites react to the chemicals in ink pens. They use one termite in their experiment. Jenny draws four circles, using four different brands of black ink. Jimmy places the termite on each circle of ink and they watch the termite's behavior as it is placed on each circle, one try per circle. In all four cases, the termite veers off the ink circle. Jimmy and Jenny conclude that termites are not attracted to ink at all. What suggestion would you give Jimmy and Jenny concerning their experimental design?


In the given experimental design, Jimmy and Jenny should use more than one termite and should run many trials as possible before coming to the conclusion. In order to be able to confirm their theory, they would have to experiment, the same trial on various termites to find whether the termites exhibit any kind of attraction towards the ink or not.  

Only one termite, which has been used in the experiment might be the one that is not getting attracted to the ink.  

ANSWERED AT 28/02/2020 - 03:47 PM

QUESTION POSTED AT 28/02/2020 - 03:47 PM

What affects the density of a substance? Select all that apply. Mass Gravity Volume Weight

mass and volume affect density

ANSWERED AT 28/02/2020 - 02:32 PM

QUESTION POSTED AT 28/02/2020 - 02:32 PM

How does the arctic tundra fit in with the Laws of conservation of Mass and Energy

In the biome, "Arctic Tundra", Tree growth is hindered by low temperatures, and then there is low mass production in vegetation. The Energy used in their formation by the vegetative would be equivalent to the energy provided by them to the biodiversity. So, the input and Output energy is equal. Hence, it obeys the law of conservation of Energy 

Hope this helps! 

ANSWERED AT 28/02/2020 - 02:10 PM

QUESTION POSTED AT 28/02/2020 - 02:10 PM

When do chemical reactions involving enzymes slow down??

When temperatures are low. If temperatures get too high, the reactions stop completely because the enzymes get denatured.

Hope this helps!

ANSWERED AT 28/02/2020 - 01:37 PM

QUESTION POSTED AT 28/02/2020 - 01:37 PM

HELP ASAP!! DUE TOMORROW!! FIRST TO HELP WILL GET MARKED AS BRAINLIEST!! 4. How does the chemical makeup of protein and nucleic acids differ from the makeup of carbohydrates and lipids?

Protein, Carbohydrate have the elements Hydrogen, Oxygen, and Carbon in them but Protein holds extra nitrogen in it.

Hope this helps!

ANSWERED AT 28/02/2020 - 01:09 PM

QUESTION POSTED AT 28/02/2020 - 01:09 PM

What is Chemical digestion?

Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.

ANSWERED AT 28/02/2020 - 12:31 PM

QUESTION POSTED AT 28/02/2020 - 12:31 PM

The warm, moist air masses in the tropics ______ in the atmosphere as they heat. sink rise circulate none of the above

Answer: Option (b) is the correct  answer.


When air is warmer then it means it molecules are moving rapidly from its initial place. Hence, its molecules gain more kinetic energy due to which there occurs more number of collisions between its molecules.

As a result, these molecules move farther apart from each other leading to the rise of air molecules.

Thus, we can conclude that the warm, moist air masses in the tropics rise in the atmosphere as they heat.

ANSWERED AT 28/02/2020 - 12:30 PM

QUESTION POSTED AT 28/02/2020 - 12:30 PM

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s is ....... J. (Formula: KE = 1/2 mv2 )

25 The kinetic energy of a ball

ANSWERED AT 28/02/2020 - 12:27 PM

QUESTION POSTED AT 28/02/2020 - 12:27 PM

What are the waste products of the chemical reaction in a cell? Please help ASAP

Carbon dioxide is a waste product of respiration and is formed from carbon and oxygen which were originally part of the food molecules. Heat energy may be released from cells during respiration. Metabolism is a word for all the chemical reactions in a living organism.

ANSWERED AT 28/02/2020 - 12:08 PM

QUESTION POSTED AT 28/02/2020 - 12:08 PM

Which is true of the light reaction of photosynthesis? A. It breaks down ATP. B. It breaks down sugar. C. It produces ATP. D. It produces sugar.

Answer: The correct option is C) It produces ATP.

Photosynthesis is the process by which green plants prepare their own food using CO₂ and H₂O in the presence of sunlight. It is primarily divided into light reaction and dark reaction.

The light reaction takes place in the thylakoid membranes of the chloroplast. In this reaction, energy from sunlight is captured by the chlorophyll pigment via a series of chemical reactions. This results in the formation of two high energy chemical compounds, which are ATP and NADPH.

These compounds are further used in the dark reaction for the synthesis of food ( which is glucose).

Thus, it produces ATP is true for the light reaction of photosynthesis.

ANSWERED AT 28/02/2020 - 12:05 PM

QUESTION POSTED AT 28/02/2020 - 12:05 PM

What is the mass of an atom with 15 neutrons and 13 electrons

Name: Aluminum 
Symbol: Al 
Atomic Number: 13 
Atomic Mass: 26.981539 amu 
Melting Point: 660.37 °C (933.52 K, 1220.666 °F) 
Boiling Point: 2467.0 °C (2740.15 K, 4472.6 °F) 
Number of Protons/Electrons: 13 
Number of Neutrons: 14 
Classification: Other Metals 
Crystal Structure: Cubic 
Density @ 293 K: 2.702 g/cm
Color: Silver 
British Spelling: Aluminium 
IUPAC Spelling: Aluminium

ANSWERED AT 28/02/2020 - 11:07 AM

QUESTION POSTED AT 28/02/2020 - 11:07 AM

Cellular respiration converts the reactants' oxygen and glucose into carbon dioxide, water, and energy. The reverse reaction of photosynthesis converts reactants of carbon dioxide and water into oxygen and glucose. These two reactions are part of which biogeochemical cycle? Water cycle Carbon cycle Phosphorus cycle Nitrogen cycle

Answer: Carbon cycle


All organic compounds are made of carbon. The source of the carbon in the living matter is carbon dioxide  whcih is present in the atmospheric air or carbon dioxide dissolved in water. Green plants and algae (producers) use carbon dioxide to make food (carbohydrate) in the presence of sunlight and water in the process of photosynthesis. The prepared carbohydrate is used by the producers and excess food is stored as fats and polysaccharides which are eaten by consumers. Carbon dioxide goes back to the atmosphere through cellular respiration.

ANSWERED AT 28/02/2020 - 10:44 AM

QUESTION POSTED AT 28/02/2020 - 10:44 AM

Which of these is a characteristic of ALL living things? A) respond to external stimuli B) absorb complex food molecules C) produce offspring by means of sexual reproduction D) use energy to actively move through the environment

Answer: Option A


The living things respond to the external stimuli. This is one of the most characteristic feature of the living things.

When any living being is exposed to an external stimuli then it will respond to the external stimulus. This is a property of all the living beings.

The external stimuli may be heat, change in temperature, change in pressure, change in the intensity of light, et cetera.

hence, the correct answer is option A

ANSWERED AT 28/02/2020 - 10:41 AM

QUESTION POSTED AT 28/02/2020 - 10:41 AM

Suppose you took a trip to the moon. Write a paragraph describing how and why your weight would change. Would your mass change too?

I can tell U something to help U with ur paragraph, like no ur mass won't change, and ur weight will change because Weight = mass X gravity, and the gravity on the moon is less than that's on earth so ur weight will also decrease, hope that helped

ANSWERED AT 28/02/2020 - 10:41 AM

QUESTION POSTED AT 28/02/2020 - 10:41 AM

Which of the folowing is not a chemical buffer system?

The body's chemical buffer system consists of three individual buffers: the carbonate/carbonic acid buffer, the phosphate buffer and the buffering of plasma proteins. While the third buffer is the most plentiful, the first is usually considered the most important since it is coupled to the respiratory system. 

Carbonic acid (H2CO3) is a weak acid and is therefore in equilibrium with bicarbonate (HCO3-) in solution. When significant amounts of both carbonic acid and bicarbonate are present, a buffer is formed. This buffer system can be written as: 

H2CO3 + H2O  H3O+ + HCO3-
Under normal circumstances there is much more bicarbonate present than carbonic acid (the ratio is approximately 20:1). As normal metabolism produces more acids than bases, this is consistent with the body's needs. The blood, with its high base concentration, is able to neutralize the metabolic acids produced. Since relatively small amounts of metabolic bases are produced, the carbonic acid concentration in the blood can be lower. 

Since carbonic acid is not stable in aqueous solutions some of it decomposes to form carbon dioxide and water. The respiratory system is responsible for removing the carbon dioxide. 

H2CO3  H2O + CO2
By combining the two reactions of carbonic acid we can write: 

ANSWERED AT 28/02/2020 - 10:34 AM

QUESTION POSTED AT 28/02/2020 - 10:34 AM

A paramecium cell moves by means of flagella

False. The paramecium uses cilia, not a flagella.


ANSWERED AT 28/02/2020 - 10:15 AM

QUESTION POSTED AT 28/02/2020 - 10:15 AM

The theory of __________ proposed that a series of catastrophes or mass extinctions followed by repopulation could explain why species change over time.

The theory of evolution proposed that a series of catastrophes or mass extinctions followed by repopulation could explain why species change over time

ANSWERED AT 28/02/2020 - 08:07 AM

QUESTION POSTED AT 28/02/2020 - 08:07 AM

How do living systems follow the law of conservation of mass and energy?

Living systems use the law of conservation of mass when a living organism dies. When the organism decomposes carbon is released and enters back into the earth. It follows the law because the mass is not being created or destroyed, but reused.
Living systems use the law of conversation of energy when an organism decomposes. Thermal energy is recycled back into the atmosphere or absorbed by other living things.
Hope this helps.

ANSWERED AT 28/02/2020 - 05:12 AM

QUESTION POSTED AT 28/02/2020 - 05:12 AM

What is the mass of the object as displayed on the balance below. 54.3 g 144 g 154.3 g 153.7g

The correct answer is D. 153.7 hope this helps

ANSWERED AT 28/02/2020 - 05:12 AM

QUESTION POSTED AT 28/02/2020 - 05:12 AM

What is one of the ways we can conserve

Re using plastic and not just throw away 

ANSWERED AT 28/02/2020 - 05:03 AM

QUESTION POSTED AT 28/02/2020 - 05:03 AM