The answer
the general equation of the reaction is
<span>NH4NO3 -------------- N2O + 2H2O
</span><span>The molar mass of NH4NO3 is 80.03
</span>The mass of NH4NO3 is <span>160.1 g
so we can deduce that
n</span>NH4NO3 = number of mole of NH4NO3 = 160.1 g / 80.03 =2 moles
by using proportion property
NH4NO3 -------------- N2O + 2H2O
1mole 1mole 2 moles
nNH4NO3 nH2O
the number of mole nH2O can be found by
1/ nNH4NO3 = 2 / nH2O
nH2O = 2 x nNH4NO3 = 2 x 2 = 4 moles
to find the mass, we use
mH2O = 4 moles x 18.01 g /mol = 36 g
Molarity (M) = moles of solute (mol) / Volume of the solution (L)
Molarity of the solution = 3.000 M
Volume of the solution = 250.0 mL = 0.25 L
moles in 250.0 mL = molarity x volume of the solution
= 3.000 M x 0.25 L
= 0.75 mol
Hence, 0.75 mol of NaCl is needed to prepare 250.0 mL of 3.000 M NaCl solution.
Moles (mol) = mass (g) / molar mass (g/mol)
Moles of NaCl in 250.0 mL = 0.75 mol
Molar mass of NaCl = <span>58.44 g/mol
Mass of NaCl in 250.0 mL = Moles x Molar mass
= 0.75 mol x </span><span>58.44 g/mol
= 43.83 g
Hence, 43.83 g of NaCl is needed to prepare 250.0 mL of 3.000 M solution.</span>
Answer:
Modal means the one that occurs most often (averages: mode). In maths, the mode is one of the most common ways to describe a set of data. ... The modal class is, therefore, the group with the highest frequency.
Answer: The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles SO2, or 64.0638 grams.
Hope it helps.
Answer:
b. close to 0 degree celsius
Explanation:
100 g * ( x-0)= 500 g * ( 25-x) , where x is the new temperature reached
if we solve for x , we get 20 degree celsius
i.e. the temperature of ice increases to 5 degree celsius and the temperature of water drops to 5 degree celsius
hope it helps.