4 years ago

Please help me... BRAINLIEST to the CORRECT AnswerI need this asap

1 answer:

6 0

not 100% sure about significant figures. density might be rounded weirdly, not sure. Idk how to find hardness, so I just found the mineral before hardness, and used the hardness of that mineral

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Calculate the molality of 75.0 grams of MgCl2 (molar mass=95.21 g/mol) dissolved in 500.0 g of solvent.

nordsb [41]

Answer: The molality of magnesium chloride is 1.58 m

Explanation:

To calculate the molality of solution, we use the equation:

$\text{Molality}=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}$

Where,

$m_{solute}$ = Given mass of solute (magnesium chloride) = 75.0

$M_{solute}$ = Molar mass of solute (magnesium chloride) = 95.21 g/mol

$W_{solvent}$ = Mass of solvent = 500.0 g

Putting values in above equation, we get:

$\text{Molality of }MgCl_2=\frac{75.0\times 1000}{95.21\times 500.0}\\\\\text{Molality of }MgCl_2=1.58m$

Hence, the molality of magnesium chloride is 1.58 m

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4 years ago

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Please help, How could you tell a Ca(NO3)2 solution from a Zn(NO3)2 solution?

tamaranim1 [39]

Answer:

you better give me brainliest

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Zinc nitrate and calcium nitrate solution can be distinguished by reaction with ammonium hydroxide. Zinc forms a white gelatinous ppt. whereas there is no precipitation of calcium hydroxide even with excess of ammonium hydroxide

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Convert 6.0cc to cm cubed

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Cc stands for cm cubed (cubic centimetre).
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In a chemical equation, (aq) after one of the substances means that it is which of these? a solid formed from two ionic substanc

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