Answer:
A solution
Explanation:
The solute is the substance being dissolved by another substance
1) Chemical reaction (thermal decomposition)
2NaHCO3 (s) ---> Na2CO3 (s) + H2O (g) + CO2(g)
2) Reasoning
The lost of mass is due to the lost of the gases H2O and CO2.
So, you can calculate the mass of Na2CO3 obtained from 1.000 g NaHCO3, and the difference will be the mass lost.
2) Convert 1.000 g of NaHCO3 to number of moles
molar mass NaHCO3: 1*23g/mol + 1*1g/mol + 1*12g/mol + 3*16g/mol = 84 g/mol
number of moles = mass in grams / molar mass = 1.000 g / 84 g/mol = 0.01190 moles
3) Use therotecial molar ratios:
2 moles NaHCO3 : 1 mol Na2CO3
=> 0.01190 mol NaHCO3 / x = 2 mol NaHCO3 / 1mol Na2CO3
=> x = 1mol Na2CO3 * 0.01190 mol NaHCO3 / 2 mol NaHCO3
=> x = 0.00595 mol Na2CO3
4) Convert 0.0595 mol Na2CO3 to mass
molar mass Na2CO3: 2*23g/mol + 1*12g/mol + 3*16g/mol = 106 g/mol
mass in grams = number of moles * molar mass = 0.00595 mol * 106 g/mol = 0.6307 g
5) lost mass
1.000g - 0.6307g = 0.3693 g
Answer: 0.3693 g
Answer:
$19.20
Explanation:
divide 3.20 by 8 in order to get the cost of 1 can
3.20/8 = 0.40
multiply the cost of 1 can ($0.40) by 48 in order to get the cost of 48 cans
0.40 * 48 = 19.20
$19.20 for 48 cans of corn
To find the experimental value I believe we add up all the temperatures found by each trial and divide by the number of trials
When added up and divided up this is 50.7 C
Then we continue with accepted value minus experimental value over accepted
53.0 - 50.7 / 53.0 x 100
4.3% percent error
