3 years ago

PLS HELP MEE !! Andy classified some substances as shown in the table.

Chemistry

2 answers:

Lelechka [254]3 years ago

5 0

Number 1 Bc of wood a magnetic

NISA [10]3 years ago

5 0

Answer:

The answer is leather is a non magnetic substance.

Explanation:

its kinda obvious lol

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How many milliliters of a 0.275 M NaOH solution is required to react with 0.450 L of CO2 gas

padilas [110]

Volume of NaOH required to react = 145.5 ml

<h3>Further explanation</h3>

Reaction

CO₂(g) + 2 NaOH(aq) ⇒Na₂CO₃(aq) + H₂O(l)

The volume of CO₂ : 0.45 L

mol CO₂ at STP (O C, 1 atm) ⇒ at STP 1 mol gas 22.4 L :

$\tt mol~CO_2=\dfrac{0.45}{22.4}=0.02$

From the equation, the mol ratio of CO₂ : NaOH = 1 : 2, so mol NaOH :

$\tt mol~NaOH=\dfrac{2}{1}\times 0.02=0.04$

Then volume of NaOH :

$\tt V=\dfrac{n}{M}\\\\V=\dfrac{0.04}{0.275}\\\\V=0.1455~L\rightarrow 145.5~mL$

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3 years ago

Which reaction occurs at the cathode of a lead-storage battery that is being recharged?

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Reaction on positive electrode (cathode):
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s - solid.
l - liquid.
aq - dissolve in water.
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