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grandymaker [24]

3 years ago

7

A metal is electrolyzed from aqueous solution by using an electrical current of 1.23 a for 2.5 hours and 3.37 grams of metal is

deposited. in a separate experiment the number of electrons used for the reduction of the metal is 2. what is the metal

1 answer:

ElenaW [278]3 years ago

3 0

48.0g piece of metal is dropped into 50.0mL of water in a graduated cylinder. The water level rises to 62.4mL.

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3 years ago

If an experiment calls for 0.200mole acetic acid (Hc2H3O2)how many grams of glacial acetic acid do we need?

bija089 [108]

<h3>Molar mass:-</h3>

$\\ \sf\longmapsto HC_2H_3O_2$

$\\ \sf\longmapsto 1u+2(12u)+3(1u)+2(16u)$

$\\ \sf\longmapsto 1u+24u+3u+48u$

$\\ \sf\longmapsto 28u+48u$

$\\ \sf\longmapsto 76u$

$\\ \sf\longmapsto 76g/mol$

No of moles=0.2mol
Given mass=?

$\\ \sf\longmapsto No\:of\;moles=\dfrac{Given\:Mass}{Molar\:Mass}$

$\\ \sf\longmapsto 0.2=\dfrac{Given\:mass}{76}$

$\\ \sf\longmapsto Given\:Mass=0.2\times 76$

$\\ \sf\longmapsto Given\:Mass=1.52g$

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3 years ago

What is the scientific method 1-7?

IRINA_888 [86]

#1- Identify a problem
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3 years ago

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$\text{Pb(OH)}_2 +2\text{HCl} \longrightarrow \text{PbCl}_2 +2 \text{H}_2 \text{O}$

$2\text{Mn} + 6\text{HI} \longrightarrow 3 \text{H}_2+2\text{MnI}_3$

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2 years ago

Opening a can of paint requires a screwdriver or other machine to pry open the lid. how does a screwdriver affect the force appl

joja [24]

<span>Opening a can of paint requires a screwdriver or other machine to pry open the lid. The screwdriver affect the force applied to opening the lid. The answer is : </span><span>B. It increases the applied force and changes its distance and direction.</span>

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3 years ago

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