Magnesium (mg) is a valuable metal used in alloys, in batteries, and in the manufacture of chemicals. it is obtained mostly from seawater, which contains about 1.30 g of mg for every kilogram of seawater. calculate the volume of seawater (in liters) needed to extract 5.33 × 104 tons of mg. seawater has a density of 1.03 g/ml. (1 ton = 2000 lb; 1 lb = 453.6 g) enter your answer in scientific notation.

Given that, 1.30 g of mg per kg (1000 g) of sea water.

Convert into gram.

1 ton = 2000 lb

Thus,

 =

= =

1 lb = 453.6 g

Thus,

=

= =

Now,

1.30 g of magnesium is present in  1000 g of seawater.

Thus, 1 g of magnesium present in of seawater.

of magnesium present in =  

= of seawater.

Now, density of sea water is

Density is equal to the ratio of mass and volume.

Put the value of density and mass to find the volume:

Volume =

Volume =

Now, convert ml into L:

1 L = 1000 ml

Volume in L =

=

Thus, volume in litres =

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

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