<span>1. Calculate the mass of the formula unit (fu). Na= 22.990 g/mol Cl= 35.453 g/mol so total = 22.990 g/mol + 35.453 g/mol = 58.443 g/mol
1 mol = 6.02 x10^23 formula units, so (58.443 g/mol)*(1 mol/6.02x10^23 fu)= 9.7x10^-23
2. Convert mass to grams: (0.17 mg)*(1 g/1000 mg) = 0.00017 g
3. Calculate number of formula units: 0.00017 g x (1 fu/9.7x10^-23 g) = 1.8x10^18
Or more simply:
(.00017 g) * (1 mol/58.443 g) * (6.02x10^23 fu/1mol) = 1.8x10^18</span>
Answer:I’ll ask my teacher
Explanation:
Answer:
The correct answer is 150 kJ.
Explanation:
As per Law of Conservation of Energy, energy can neither be created nor destroyed, it can only change from one form to another.
If a chemical reaction absorbs 150 kJ and all the energy that is being absorbed is neither created nor destroyed, then it means all the energy absorbed comes from the surroundings (Air, wall of container etc).
Answer:
More reactive - Sodium and potassium
Less reactive - Aluminum, Manganese and Zinc
Because it is a representation of data or maybe an object/process that is used to describe a certain data of phenomena that cannot be figured out directly.
