Chemistry, 05.07.2019 08:20 Syaralopez

Which mass measurement contains four significant figures? 1. 0.086 g 2. 0.431 g 3. 1003 g 4. 3870 g

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Answer from: 12bluestone

Answer :

(1) The given number in 4 significant figures will be, $8.600\times 10^{-2}g$

(2) The given number in 4 significant figures will be, $4.310\times 10^{-1}g$

(3) The given number in 4 significant figures will be, $1.003\times 10^3g$

(4) The given number in 4 significant figures will be, $3.870\times 10^3g$

Explanation :

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

(1) The given number 0.086 g converted into 4 significant figures.

In 0.086 g, there are 2 significant figures. Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be, $8.600\times 10^{-2}g$

(2) The given number 0.431 g converted into 4 significant figures.

In 0.431 g, there are 3 significant figures. Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be, $4.310\times 10^{-1}g$

(3) The given number 1003 g converted into 4 significant figures.

Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be, $1.003\times 10^3g$

(4) The given number 3870 g converted into 4 significant figures.

Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be, $3.870\times 10^3g$

Answer from: Quest

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

Answer from: Quest

definition

entropy is a measure of the randomness or the extent of disorder of a chemical process.

enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

entropy is measured in joule per kelvin (jk⁻¹) whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

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Which mass measurement contains four significant figures? 1. 0.086 g 2. 0.431 g 3. 1003 g 4. 3870 g...

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