What is the mass of solid nh4cl formed when 75.5g of nh3 is mixed with an equal mass of hcl? what is the volume of the gas remaining, measured at 14.0c and 752 mmhg? what gas is it? the formula is nh3 (g) + hcl gas -> nh4cl solid

Answer : The volume of the gas remaining is 56.5 liters.

The gas is hydrochloric acid and the formula of the gas is HCl.

Explanation :

The balanced chemical reaction will be:

First we have to calculate the moles of and HCl.

Molar mass of = 17 g/mole

and,

Molar mass of = 36.5 g/mole

Now we have to calculate the limiting and excess reagent.

From the balanced reaction we conclude that

As, 1 mole of react with 1 mole of

So, 2.07 mole of react with 2.07 mole of

From this we conclude that, is an excess reagent because the given moles are greater than the required moles and is a limiting reagent and it limits the formation of product.

The remaining moles of gas = 4.44 - 2.07 = 2.37 moles

Now we have to calculate the volume of the gas remaining.

Using ideal gas equation :

where,

P = Pressure of gas = 752 mmHg = 0.989 atm     (1 atm = 760 mmHg)

V = Volume of gas = ?

n = number of moles of gas = 2.37 moles

R = Gas constant =

T = Temperature of gas =

Putting values in above equation, we get:

Thus, the volume of the gas remaining is 56.5 liters.

The gas is hydrochloric acid and the formula of the gas is HCl.

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we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).