About 4. the weight of He is about 4 amus and the weight of O is about 16 amus, so you would need 4 He atoms to get close to the same mass as an O atom. i hope this helps
I believe the correct response would be A. The ions once dissolved in the solution are free to move
0.2625 litres is the volume of methanol should be used to make 1.25 L of a 21.0% by volume solution.
Explanation:
Given that:
Volume of solution = 1.25 litres
methanol to be present in the composition of 21% of the volume.
To make 21 % solution by volume of a substance it means that 21 L of the substance is present in 100 L of the solution which is made upto 100 L by adding the solvent.
So, 21 L in 100 L will make 21% solution
x litres of methanol in 1.25 L of solution
So, 
= 
x = 0.2625 litres
hence, 0.2625 litres of the methanol will be added and the volume will be made to 1.25 litres so that 21% solution by volume gets form.
Answer:
Weather is the condition of Earth’s atmosphere at a particular time and place, whereas climate is the characteristic weather in an area over a long period of time.
Explanation:
Weather and climate are two very important conditions that describes the atmospheric overview of a place.
Weather is reported over a short period of time, it is the condition of the atmosphere at a particular time and place.
Climate is reported over a long period of term. The average weather condition of a place over a long period of time is the climate.
- The most important control over the climate of a place is the temperature and amount of precipitation it receives over a period of time.
- Weather conditions is reported using more diverse factors such a temperature, pressure, humidity, precipitation, etc.
