Complete question is;
Molding a shape from soft, malleable material (clay or plaster) or constructing a shape from harder material (such as metal or paper) is called what?
Molding is what a child does with Play-Doh or origami
Answer:
Modeling
Explanation:
In chemistry, we have a branch called modeling chemistry. In modeling, we organize together a series of models instead of a collection of topics. In this approach, we will begin with a phenomena that can be readily observed and are gradually develop the simplest model of matter that helps us make sense of our observations.
Now in the question, we are Molding a shape from soft, malleable materials like clay/plaster or constructing from harder materials like metal/paper. This means that we are organizing a series of models from either soft & malleable or harder materials to produce a simple model shape.
Thus, this is simply modeling.
b. dizzy spells
c. stroke
d. heart attack
how many moles of O2 is required?
1. 27.79
2. 7.63
3. 8.4
4. 25.48
5. 12.635
6. 21.035
7. 23.8
8. 19.04
9. 22.715
10. 26.775
Answer in units of mol.
Answer:
22.715 moles of oxygen are used
Explanation:
Given data:
Number of moles of ethane = 6.49 mol
Number of moles of O₂ required = ?
Solution:
Chemical equation:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Now we will compare the moles of oxygen with ethane.
C₂H₆ : O₂
2 : 7
6.49 : 7/2×6.49 = 22.715 mol
Thus, 22.715 moles of oxygen are used.
B.a rock maintaining its solid shape
C.a koala using claws to hold onto a tree
A rock maintaining its solid shape is one that required intermolecular forces. Thus, option (B) is correct.
Intermolecular forces are those forces that maintain chemical interactions between molecules of a substance and other types of particles present in the substance.
Rocks are constructed of different particles held together by various types of intermolecular forces depending on the kinds of particles present in the rock. Intermolecular forces can occur among molecules and other particles in a solid compound.
Intermolecular forces can either be attractive forces or repulsive forces. The molecules of opposite charges such as positive and negative charges can have attraction between them. While repulsion occurs between particles with similar charges such as between positive and positive charges.
The Intermolecular forces maintain the integrity of the structure of that compound. Intermolecular forces in compounds exist such as electrovalent bonds, covalent bonds, Vander Waals forces, hydrogen bonds, etc.
Learn more about Intermolecular forces, here:
#SPJ6
Answer is: D. substitution.
Substitution reaction or single displacement reaction is a chemical reaction in which one functional group in a chemical compound is replaced by another functional group.
Balanced chemical reaction: CH₃Br(aq) + OH⁻(aq) → CH₃OH(aq) + Br⁻(aq).
In this balanced chemical reaction hydroxy group OH⁻ replaced one atom of bromine (Br⁻) in methyl bromide (CH₃Br).
Answer : The correct option is, (D) Substitution reaction.
Explanation :
Addition reaction : It is a type of reaction in which a molecule combined with the another molecule to give a new larger molecule.
The general representation of this reaction is,
Condensation reaction : It is a type of reaction in which two molecules combine to form a larger molecule and also producing a smaller molecule such as water.
Elimination reaction : It is a type of reaction in which the loss of elements from the starting material to form a double bond in the product.
The general representation of this reaction is,
Substitution reaction : It is a type of reaction in which one functional group is replaced by the another functional group.
The general representation of this reaction is,
(B and C are the two different functional groups)
In the given reaction, Br (functional group) is replaced by the hydroxide ion (functional group). So, this reaction is a substitution reaction.
Hence, the given reaction is a substitution reaction.