3 years ago

Give the number of significant figures 6.32 g

2 answers:

6 0

There are 3 significant figures. significant figures are all digits that are not zeros. as well as all zeros that would NOT change the number if removed. i know it seems backwords but they are significant to telling where the measurement ends.

shtirl [24]3 years ago

4 0

There are 3 sig figs

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yawa3891 [41]

The % yield of Ca(OH)₂ : 62.98%

<h3>Further eplanation </h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

CaO + H₂O ⇒ Ca(OH)₂

mass CaO= 4.2 g

mol CaO(MW=56,0774 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{4.2}{56,0774 g/mol}\\\\mol=0.075$