Answer:
The coefficients are 6, 1, 3
Explanation:
HNCO →C3N3(NH2)3 + CO2
From the above equation, there are a total of 6 atoms of nitrogen on the right side and 1atom on the left. It can be balance by putting 6 in front of HNCO as shown below:
6HNCO → C3N3(NH2)3 + CO2
Now there are 6 atoms of carbon on the left side and 4 atoms on the right side. It can be balance by putting 3 in front of CO2 as shown below:
6HNCO → C3N3(NH2)3 + 3CO2
Now the equation is balanced as the numbers of atoms of the different elements on both sides of the equation are the same.
The coefficients are 6, 1, 3
in 6.0 years it will be 450.00 heart beats
in 6.00 years it will be 450.000 heart beats
in 6.000 years it will be 450.0000 heart beats
Explanation:
Answer:
0.23mol/kg
Explanation:
Given parameters:
Mass of Potassium Bromide = 25g
Volume of pure water = 900mL
Unknown:
Molality = ?
Solution:
Molality is one of the ways of measuring concentration. It is the number of moles of solute in given mass of solvent.
Mathematically;
Molality =
Number of moles of KBr;
Number of moles =
Molar mass of KBr = 39 + 80 = 119g/mol
Number of moles =
= 0.21mole
Mass of solvent;
Mass of solvent = density of water x volume of water
Mass of solvent = 1.0g/mL x 900mL = 900g = 0.9kg
Now;
Molality =
= 0.23mol/kg