Answer:
1,260 is your answer plz mark if this right
Explanation:
Answer:
The thermal energy, orheat, of an object is obtained by adding up the kinetic energy of all the molecules within it.Temperature is the average kineticenergy of the molecules.
Change of matter
- Know simple science rules and that will help.
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1. Which of the following is a part of a land-based carbon cycle?
Trees
Whales, crab shells, and coral reefs would be part of the ocean-based carbon cycle. Trees roles in the carbon cycle are to catch carbon in the atmosphere (in carbon dioxide forms) and do photosynthesize to create carbohydrate.
Shells are reefs hard skeleton is consist of inorganic carbon that mostly made by CaCO3(calcium carbonate) compound.
2. X represents a substance in a plant involved in photosynthesis. What is its role?
</span><span>It traps light energy and converts it into chemical energy.
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6CO2 + 6H2O + light energy = C6H12O6 + 6O2.
The main product of photosynthesis is a carbohydrate, which is the main energy source for living organism. From the equation, you can see that A is water and B is carbohydrate.
To produce carbohydrate, photosynthesis needs energy that was provided by the sunlight. The plant has a substance that could convert light into chemical energy called chlorophyll that was stored inside chloroplasts cells. The X above the arrow is chlorophyll<span>.
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3. What type of energy transformation takes place when carbon is cycled in a gasoline-based car?
Chemical energy to mechanical energy
The gasoline will undergo combustion process which will produce heat and mechanical energy in the piston of the machine. The energy desired would be mechanical energy and the thermal energy is just side product.
4. Which of the following statements would correct one of the roles listed in the table?
Water combines with carbon dioxide during photosynthesis.
On the photosynthesis equation I mentioned above, water and carbon dioxide is the reactant of the photosynthesis. They both will be combined to produce carbohydrate(sugar) and water molecules.
Chrolophyll is not part of the reaction. It just provides the energy needed for the reaction.
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5. Which of the following processes does not take place during cellular respiration?
Hydrogen of water is separated from oxygen.
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In cellular respiration, the cells using the carbohydrate to produce energy.
The reaction is similar with photosynthesis with reversed product and reactant.
C6H12O6 + 6O2 --> 6H2O + 6CO2 + ATP.
As you can see in the equation, cellular respiration is not using water but produce it instead. It doesn't produce hydrogen either. <span>
6. Using the above equation, how would you prove the law of conservation of mass?
By showing that the numbers of atoms of the same type are equal on both sides.
</span>The law of conservation of mass state that mass can't be produced. That means the reactant and product mass should be same.
The law can be proved by comparing the number of atoms from each element in reaction. The product should have the same number of atoms of the same type with the reactant
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7. During which of the following processes would carbon most likely be required?
Making of glucose
Glucose is carbohydrate that was made of carbon, hydrogen, and oxygen. Since glucose contains carbon, it is most likely to require carbon to make glucose.
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Breaking of rocks, generation of electricity, and running of cars need energy that can be gained from various ways.</span>
Answer:
Explanation:
Chemical formulae tells the kind of atoms and their relative proportion in a compound.
For this purpose, chemical formulae use <em>chemical symbols</em> and <em>numbers</em>.
Each element has a chemical symbol. For example, H is used for hydrogen, O is used for oxygen, Na is used for sodium, C is used for carbon.
Numbers as subscripts to the right of a chemical symbol means the number of atoms of that element in the compound.
These are some examples:
Compound chemical meaning
formula
Sodium chloride NaCl the unit fomula NaCl is formed by 1
atom of sodium and 1 atom of chlorine.
Water H₂O the molecule H₂O (water) is formed by
2 atoms of hydrogen and 1 atom of oxygen.
Methane CH₄ the molecule CH₄ is formed by 1 atom of
carbon and 4 atoms of hydrogen.
In those examples you see how <em>chemical symbols and numbers, which is the chemical formulae, are used to represent the substances.</em>
