Circular lines on topographic map is called Contour lines these lines shown on two dimension map and depict elevation on the ground . the distance of each contour line is set to represent a certain level of elevation with zero being sea level . mostly map use distance between coutour lines is 10 m
Answer:
20%
Explanation:
mass by mass percentage of a solution =(mass of solute)/(mass of solution)
mass of solute=550g
therefore 110×100/550=20%
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Answer:
Option B and D
Explanation:
The Gibb's free energy also referred to as the gibb's function represented with letter G. it is the amount of useful work obtained from a system at constant temperature and pressure. The standard gibb's free energy on the other hand is a state function represented as Delta-G, as it depends on the initial and final states of the system.
A feasible way to synthesize the product entails the spontaneity of the reaction.
The spontaneity of a reaction is explained by the standard gibb's free energy.
If Delta-G = -ve ( the reaction is spontaneous)
if Delta -G = +ve ( the reaction is non-spontaneous)
if Delta-G = 0 ( the reaction is at equilibrium)
Hence the option (B and D) with negative Gibb's free energy are the reaction that are spontaneous.
Answer:
Mass of CaBr₂ = 179.9 g
Explanation:
Given data:
Volume of CaBr₂ solution = 450.0 mL (450/1000 = 0.45 L)
Molarity of solution = 2.00 M
Mass of CaBr₂ = ?
Solution:
Formula:
Molarity = number of moles / volume of solution in L
Now we will put the values.
2.00 M = number of moles / 0.45 L
Number of moles = 2 M × 0.45 L
Number of moles = 0.9 mol ( M = mol/L)
Mass of CaBr₂:
Mass of CaBr₂ = number of moles × molar mass
Mass of CaBr₂ = 0.9 mol × 199.89 g/mol
Mass of CaBr₂ = 179.9 g
Yes, Polymers are materials made of long, repeating chains of molecules. ... Proteins are natural polymers made up of amino acids, and nucleic acids (DNA and RNA) are polymers of nucleotides — complex molecules composed of nitrogen-containing bases, sugars and phosphoric acid, for example.