You can tell if it's an Ion dipole if it is a force between ion and polar molecule. Just remember all these: an ion is an atom that gained or lost one or more electrons. It has negative or positive charge. A cation is positively charged. An anion is negatively charged. By knowing these, you can understand how they will bond together.
Molar mass:
KCl = 74.55 g/mol
KClO3 = 122. 55 g/mol
<span>Calculation of the mass of KClO3 :</span>
<span>2 KClO3 = 2 KCl + 3 O2</span>
2* 122.55 g KClO3 ------------------ 2 * 74.55 g KCl
mass KClO3 ?? --------------------- 25.6 g KCl
mass KClO3 = 25.6 * 2 * 122.55 / 2 * 74.55
mass KClO3 = 6274.56 / 149.1
mass = 42.082 g of KClO3
Therefore:
1 mole KClO3 ---------------------- 122.55 g
?? moles KClO3 ------------------- 42.082 g
moles KClO3 = 42.082 * 1 / 122.55
moles KClO3 = 42.082 / 122.55
=> 0.343 moles of KClO3
Answer C
hope this helps!
<h3>
Answer:</h3>
2.572 g
<h3>
Explanation:</h3>
From the question;
Volume of Helium gas, V is 18.5 L
Pressure,P is 85.5 kPa
Temperature, T is 296 K
We are required to calculate the mass of Helium gas
<h3>Step 1: Calculate the number of moles of Helium gas </h3>
- This can be done using the ideal gas equation.
- The ideal gas equation is PV=nRT, where P is the pressure, V is the volume, n is the number of moles, T is the temperature and R is the ideal gas constant which is 8.314 kPa.L/K.mol
Rearranging the formula;
Thus,
n = 0.643 moles
Therefore, moles of Helium are 0.643 moles
<h3>Step 2: Calculate the mass of Helium gas </h3>
To calculate the mass we multiply the number of moles by the molar mass.
Mass = Number of moles × Molar mass
Molar mass of Helium = 4.00 g/mol
Therefore;
Mass of He = 0.643 moles × 4.00 g/mol
= 2.572 g
Hence, mass of helium gas is 2.572 g