The rock in a lead ore deposit contains 89 % pbs by mass. how many kilograms of the rock must be processed to obtain 1.5 kg of pb?

Approximately 1.9 kilograms of this rock.

Explanation:

Relative atomic mass data from a modern periodic table:

To answer this question, start by finding the mass of Pb in each kilogram of this rock.

89% of the rock is . There will be 890 grams of in one kilogram of this rock.

Formula mass of :

.

How many moles of formula units in that 890 grams of ?

.

There's one mole of in each mole of . There are thus of in one kilogram of this rock.

What will be the mass of that of ?

.

In other words, the in 1 kilogram of this rock contains of lead .

How many kilograms of the rock will contain enough to provide 1.5 kilogram of ?

.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.