Answer: In an endothermic reaction for whom the value of is positive has potential energy of the products greater than the potential energy of the reactants.
Explanation:
A chemical reaction in which heat energy is absorbed is called an endothermic reaction. For an endothermic reaction the value of is positive.
A chemical reaction in which heat energy is released is called an exothermic reaction. For an exothermic reaction the value of is negative.
In an endothermic reaction, heat energy is absorbed by the reactant molecules due to which the energy of products tend to increase. As potential energy is the energy acquired by a substance due to its position.
Therefore, we can conclude that in an endothermic reaction for whom the value of is positive has potential energy of the products greater than the potential energy of the reactants.
Answer:
The answer is 33 .
Explanation:
The mass number of an atom is the atomic mass which consists of proton and neutron. This atom has 16 protons and 17 neutrons so it has a mass of 33 :
proton number + neutron number = nucleon number / atomic mass
16 + 17 = 33
Answer:
Characteristics such as melting point, boiling point, density, solubility, color, odor, etc. are physical properties. Properties that describe how a substance changes identity to produce a new substance are chemical properties. ... Physical and chemical properties can be used to classify a substance as ionic or molecular.
Answer:
Aluminium
Explanation:
Ionization energy is the amount of energy needed to remove an electron from a gaseous atom to form a gaseous ion.
The difference between the third and fourth ionization energies is great. This indicates a group III element which is in the third period.
This element is Aluminium (Al)
Answer:
- Leaves impurities in their starting layer - Extraction
- Moves impurities from one layer to another - Wash
- Moves desired compound from one layer to another - Extraction
- Often involves a reaction in one of the layers - Extraction
- Leaves desired compound in its starting layer - Wash
Explanation:
Both extraction and wash are technical materials separation processes. Both seek to carry out a separation of liquid-liquid, through the relationship between solvent and solute present in this solution. Both use a separation funnel and are very similar processes where the main difference is the purpose that each one seeks to exercise. The extraction causes the dissolution of the material that the researcher wants to leave behind. this process leaves impurities in the initial solution layer and moves the researcher's desired compound to the second layer of solution. A chemical reaction can take place during this process.
A wash, on the other hand, dissolves all impurities from the solution and extracts the compound desired by the researcher. Therefore, we can conclude that during this process the impurities are moved from one layer to another in the solution until it is discarded from the funnel, leaving the desired compound in the initial layer.