Answer:
number of molecules and the number of moles
Explanation:
Its always same for molcols
The relationship between number of molecules and the number of moles is more consistent as the moles and molecules are related by Avogadro's number.
What is Avogadro's number?
Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
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How does changing the initial temperature of the copper affect how much heat energy it has?
Answer:
the rock has a greater amount of heat energy which transfers to water causing vaporization.
A student reads the statement shown.
"The force of gravity exerted on an object decreases as the distance between the objects increases."
Using this statement, what inference can the student make regarding the movement of the planets around the Sun?
A. The orbital speeds of larger planets will be faster than smaller planets.
B. The orbital speeds of gaseous planets will be faster than rocky planets.
C. The orbital speeds of planets closer to the Sun will be faster than planets farther away.
D. The orbital speeds of planets with smoother surfaces will be faster than planets with rougher surfaces.
Answer: C. The orbital speeds of planets closer to the Sun will be faster than planets farther away.
Explanation:
Centripetal force = gravitational force
[tex]\tt m\dfrac{v^2}{r}=Fg[/tex]
[tex]\tt Fg=G\dfrac{M.m}{r^2}[/tex]
Fg inversely proportional to distances (r)
[tex]\tt v^2=\dfrac{Fg.r}{m}[/tex]
because the value of the gravitational force is getting smaller as the distance is getting further from the sun, the orbital speed of the planet will be getting smaller
An indicator is_____ Select all that apply.
an inorganic compound used to determine if a solution is acidic or basic
an organic compound that does use color.
an organic compound that is used to indicate whether a solution is an acid or a base
an organic compound that does NOT use color.
Answer: C
Explanation:
Indicators are organic weak acids or bases with complicated structures.
An indicator is an an organic compound that is used to indicate whether a solution is an acid or a base.
What is an indicator?
Indicator is defined as a chemical substance which is chemically a weak acid or a weak base which changes it's color depending upon the concentration of hydrogen ions present in the solution.They dissociate slightly in water to produce ions.
These are generally derived from plant pigments and are of slightly acidic or basic in nature.There are three types of indicators:
1) natural indicators
2) synthetic indicators
3) olfactory indicators.
These are mainly used in determination of end point of titrations. Every indicator has it's pH range in which it can perform effectively.These are usually organic compounds.Examples of indicators are phenolphthalein ,methyl red, EBT,eosin,etc.
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Name a compound that made from a covalent bond and name it’s use please!!!
How does the life cycle of an average-sized star differ from the life cy-
cle of a high-mass star?
Stars with higher mass have much shorter life cycles because stars expand as they get older that is why the larger the star the older it is smaller stars are more dense with more energy
Which molecule contains bonds with a greater polarity.
What is 3.44555555 rounded to 3dp
You have a 0.200mol piece of aluminum. How many atoms are present in
the aluminum?
0.2 × 6.022 × 10²³ = 12.044 × 10²² = 1.2044 × 10²³
What kind of rocks might you expect to find on the Moon? Why do you think that?
Answer:
The Moon's surface is dominated by igneous rocks. The lunar highlands are formed of anorthosite, an igneous rock predominantly of calcium-rich plagioclase feldspar
Explanation:
Cation____ electrons causing the ion to have a ______ charge and anion ______ electrons to have a ________ charge
Answer:
are electrons causing the ion to have a positive charge and anions are electrons that have a negative charge
Explanation:
Compare and contrast the sense of smell and the sense of touch.
Considering the highly colored nature of the copper-containing reactant and product observed in part b, select an instrument that might have been useful in characterizing the equilibrium?.
The instrument that might be useful in characterising the equilibrium is spectrophotometer.
The use of spectrophotometerSpectrophotometer is an instrument that is used to determine the reflectance of solutions which is affected by the amount of photons absorbed by the solution.
In a solution where by both the reactant and the product contain highly coloured nature of copper, the spectrophotometer can be used to characterise the equilibrium of copper.
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