What is the approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3?
a.0.42 g
b.2.4 g
c.42 g
d.260 g

Mass, m = 260 grams

Explanation:

It is given that,

Density of silver,

Volume of the silver,

We need to find the mass of a piece of silver. The formula for the density is given by :

m = 262.5 g

or

m = 260 grams

So, the mass of the piece of the silver is 260 grams. Hence, this is the required solution.

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

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