All categories

2 years ago

Help me. please help me.

Chemistry

1 answer:

igor_vitrenko [27]2 years ago

3 0

B- 90 grams bc 45 mL times 2 equals 90

You might be interested in

2] Calculate the percentage of the element forming sugar glucose C6H1206<br>[C=12, H=1, 0=16]

inysia [295]

Answer:

wouldn't it be 52

Explanation:

3 0

2 years ago

Suppose a current of is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for s

WARRIOR [948]

The given question is incomplete. The complete question is:

Suppose a current of 0.920 A is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 47.0 seconds. Calculate the mass of pure silver deposited on a metal object made into the cathode of the cell.

Answer: 0.0484 g

Explanation:

$Q=I\times t$

where Q= quantity of electricity in coloumbs

I = current in amperes = 0.920 A

t= time in seconds = 47.0 sec

$Q=0.920A\times 47.0s=43.24C$

$AgNO_3\rightarrow Ag^++NO_3^-$

$Ag^++e^-\rightarrow Ag$

96500 Coloumb of electricity electrolyzes 1 mole of Ag

43.24 C of electricity deposits = $\frac{1}{96500}\times 43.24=0.00045moles$ of Ag

$\text{ mass of Ag}={\text{no of moles}\times {\text{Molar mass}}=0.00045mol\times 108g=0.0484g$

Thus the mass of pure silver deposited on a metal object made into the cathode of the cell is 0.0484 g

6 0

2 years ago

What is sewageband dirty amd water

Sav [38]

Answer:

Sewage is a liquid containing wastes from households, industrial and agricultural activities discharged into water and it is dirty water.

7 0

2 years ago

How could you “supersaturate” solutions, exceeding the amount of dissolved solute possible

Bingel [31]

Answer:

Explanation:

In a saturated solution, more solute cannot be dissolved at a given temperature.

This is because, the solute dissolves in a solvent because of space between particles of solvent but on continuous addition of solute, the space between the solvent particles gets fulfilled. Thus no more solute particle can dissolve in a solvent.

4 0

2 years ago

Which of the following items is NOT a compound?

Ede4ka [16]

NaOH but you didnt give options

7 0

1 year ago