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3 years ago

Reactants → products

Chemistry

1 answer:

uranmaximum [27]3 years ago

3 0

Answer:

they are equal

Explanation:

the Law of Conservation of Mass states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change

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A student prepares 150.0 mL of 1.40 M HCl using 35.0 mL of a stock solution. What is the concentration of the stock solution? Us

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Answer:6.0M

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3 years ago

Calcium is a group 2 element. Chlorine is a group 7 element. They form an ionic compound called

kondaur [170]

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Explanation:

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Calcular la cantidad de NaOH necesaria para preparar medio litro de disolución 2,5 N. (Dato: peso molecular del NaOH = 40 g/mol)

kolbaska11 [484]

Answer:

The amount of NaOH required to prepare a solution of 2.5N NaOH.

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Explanation:

Since,

NaOH has only one replaceable -OH group.

So, its acidity is one.

Hence,

The molecular mass of NaOH =its equivalent mass

Normality formula can be written as: $Normality=\frac{mass of solute NaOH}{its equivalent mass} * \frac{1}{volume of solution in L} \\$

Substitute the given values in this formula to get the mass of NaOH required.

$2.5N=\frac{mass of NaOH}{40g/mol} *\frac{1}{1L} \\mass of NaOH=2.5N*40gmol\\ = 100.0g$

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3 years ago

Both Sydney, Australia and Guangzhou, China are on the East coasts of continents in the Pacific Ocean. Why are their yearly temp

cestrela7 [59]

Answer:

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(I'm assuming you meant to put Australia in the options)

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China is in the northern hemisphere and has its summer in July etc and Winter in December etc.

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