1 mole of a pure substance has a mass equal to its molecular mass expressed in grams.
This is known as the molar mass, M, and has the units g mol-1
So 2 moles of a substance would have a mass = 2 x molar mass
3 moles of a substance would have a mass = 3 x molar mass etc
This leads to the formula: mass = moles x molar mass
If we let:
m = mass of substance in grams,
n = moles of pure substance,
M = molar mass of the pure substance in g mol-1
we can write the equation: m = n x M
This equation can be rearranged to give the following:
n = m ÷ M (moles = mass ÷ molar mass)
M = m ÷ n (molar mass = mass ÷ moles)
Answer:
There are 3 elements, Sodium, Carbon, and oxygen. There are 2 Sodium atoms 2*2=4, one carbon, and 3 Oxygen so 4+1+3=8 total atoms. one compound CO3
Explanation:
that's all I know
1) Chemical equation
<span>4C3H5(NO3)3(l) 12CO2(g) + 6N2(g) + 10H2O(g) + O2(g)

2) Molar ratios
4 mol C3H5(NO3)3 : 10 mol H2O
3) Convert grams of water into number of moles:
numer of moles = mass in grams / molar mass = 120 g / 18.0158 g/mol =
number of moles = 6.66 moles H2O.
4) use proportion and solve for x
4 mol C3H5(NO3)3 / 10 mol H2O = x / 6.66 mol H2O
=> x = 6.66 mol H2O * 4 mol C3H5(NO3)3 / 10 mol H2O = 2.66 mol C3H5(NO3)3
5) Convert </span><span>2.66 mol C3H5(NO3)3 into grams
mass in grams = molar mass * number of moles = 227.0995 g * 2.66 mol = 605.07 g
Answer: 605.07 g</span>