Determine the number of moles of compound in each of the following samples.?
4.50g h2o
471.6g ba(oh)2
129.68g fe3(po4)2

Explanation:

To calculate the number of moles, we use the equation:

   ......(1)

Given mass of water = 4.50 g

Molar mass of water = 18 g/mol

Putting values in equation 1, we get:

Hence, the moles of given amount of water is 0.25 moles.

Given mass of barium hydroxide = 471.6 g

Molar mass of barium hydroxide = 171.34 g/mol

Putting values in equation 1, we get:

Hence, the moles of given amount of barium hydroxide is 2.75 moles.

Given mass of iron phosphate = 129.68 g

Molar mass of iron phosphate = 150.82 g/mol

Putting values in equation 1, we get:

Hence, the moles of given amount of iron phosphate is 0.86 moles.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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