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2 years ago

Which best describes the law of conservation of mass?

2 answers:

8 0

D. The mass of the reactants and products is equal and is not dependent on the physical state of the substances

NOTE: law of conservation of mass is even more observable in closed systems!

Have a great day/night

xz_007 [3.2K]2 years ago

3 0

Answer: D

Explanation:

D) The mass of the reactant and products is equal and is not dependent on the physical state of the substances

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The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and:

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Answer: NaNO3 (Sodium Trioxonitrate (V) )

Explanation:

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3 years ago

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You must make 1 L of 0.2 M acetic acid (CH3COOH). All you have available is concentrated glacial acetic acid (assay value, 98%;

Sergeu [11.5K]

Answer:

The correct answer is "11.44 ml".

Explanation:

Molarity,

= 0.2 M

Density,

= 1.05 g/ml

Volume,

= 1 L

As we know,

⇒ $Molarity=\frac{No. \ of \ moles }{Volume \ of \ solution}$

or,

⇒ $No. \ of \ moles=Molarity\times Volume$

On putting the values, we get

⇒ $=0.2\times 1$

⇒ $=0.2 \ moles$

Now,

⇒ $No. \ of \ moles=\frac{Mass \ taken}{Molecular \ mass}$

or,

⇒ $Mass \ taken=No. \ of \ moles\times Molecular \ mass$

⇒ $=0.2\times 60.05$

⇒ $=12.01 \ gram$

hence,

⇒ $Density= \frac{Mass }{Volume}$

or,

⇒ $Volume=\frac{Mass}{Density}$

⇒ $=\frac{12.01}{1.05}$

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3 years ago

At the end of the reaction you washed the chemicals into a beaker using water. Why was it OK to use water to do this if Grignard

lesya692 [45]

Answer: water could be used to wash it since the reaction has ended.

Explanation:

There will be no reaction of water with the Grignard reagent since the reaction has ended, as it is well known that water is a universal solvent for washing of glasswares after experiments but if it is during the reaction it will be more advisable to rinse with alcohol to enhance more accuracy during the experiment

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3 years ago

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aksik [14]

Answer:

Weather is at a specific place and time. Climate is over a period of time.

Explanation:

That is the difference

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3 years ago

Does anyone know the answer?????

Juli2301 [7.4K]

Answer:

In chemistry, pH (/piːˈeɪtʃ/) (abbr. power of hydrogen or potential for hydrogen) is a scale used to specify how acidic or basic a water-based solution is. Acidic solutions have a lower pH, while basic solutions have a higher pH.

Explanation:

that should answer ur question

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3 years ago