Answer:
When a sodium atom transfer over to a chlorine atom it forms a sodium cation and a chloride anion.
Explanation:
During that time both of the ions would have completely valence shells and energy wise are more stable, the reaction is usually VERY exothermic (Release of heat) which usually produces a bright yellow light.
Answer:
Explanation:
<u>1, Formula</u>
- Mass percent = (mass of solute/mass of solution) × 100
<u>2. Determine mass of solution</u>
Substitute the data and clear the mass of solution:
- 3.5 = (3.0g / mass of solution) × 100
- 0.035 = 3.0g / mass of solution
- mass of solution = 3.0 g / 0.035
- mass of solution = 85.714g
<u>3. Determine the mass of solvent:</u>
- mass of solvent = mass of solution - mass of solute
- mass of solvent = 85.714g - 3.0g = 82.714g
Round to two significant figures: 83 g
Answer:- 0.134 seconds
Solution:- The speed is given as 
and the circumference is 24900 miles which is same as the distance light have to covered. It asks to calculate the time required to cover this distance by the light.
We need to do unit conversion from miles to meter as the speed is given in meter per second.
1 mile = 1609.34 meter
So, 
= 40072566 meters
Know that, 
It's rearranged to time as, 
Let's plug in the values in it:
= 0.134 seconds
So, the light would take 0.134 seconds to travel the mentioned speed. The answer without the unit is 0.134.
