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3 years ago

Why do some scientists prefer to express concentrations of water contaminants in the units ppm and ppb rather than molarity?

Chemistry

1 answer:

ira [324]3 years ago

4 0

Explanation:

These molarity units are used to express very small solute concentrations. Molarity cannot be used to express small amount of solute dissolved in solvents.

parts per million ppm is a dimensionless quantity that represents the part of a whole number in units of $\frac{1}{1000000}$

parts per billion ppb represents the part of a whole in units of $\frac{1}{1000000000}$

These quantities are useful in determining very small amount of solute like gold concentration in stream sediments.

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Is tropism the response of a plant to light, gravity, touching . or water?

solniwko [45]

Answer:

all

Explanation:

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3 years ago

KOH (aq) + HNO(little3) (aq) = KNO(little 3) (aq) + H20 (1)

Yuki888 [10]

The reaction already balanced

<h3>Further explanation </h3>

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:

• 1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.

• 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product

• 3. Select the coefficient of the substance with the most complex chemical formula equal to 1

For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:

Balancing C, H and the last O

Reaction

KOH (aq) + HNO₃ (aq) ⇒ KNO₃ (aq) + H₂0 (l)

give coefficient

aKOH (aq) + bHNO₃ (aq) ⇒ KNO₃ (aq) + cH₂0 (l)

K : left = a, right = 1⇒a=1

N : left = b, right =1, b=1

H: left = a, right a+b=2c⇒1+1=2c⇒2=2c⇒c=1

KOH (aq) + HNO₃ (aq) ⇒ KNO₃ (aq) + H₂0 (l)⇒ already balanced

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3 years ago

Which phenomena naturally warms earth lower atmosphere and surface?

Alenkinab [10]

The phenomenon that naturally warms the earth's lower atmosphere and surface is called the greenhouse effect.

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elena-s [515]

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