Answer:
See explanation
Explanation:
Precision means the reputability of measurement and accuracy means how close a measurement is to the actual value. To get the measured mass of the acetone we need to substract the mass of the bottle from the measured mass of bottle and acetone.
The mass of the bottle is 38.0015g
⇒The mass of acetone in bottle 1= 0.7783g
⇒Mass of acetone in bottle 2= 0.7780g
⇒Mass of acetone in bottle3= 0.7786g
The measured value is near to each other. ⇒ the measurements are <u>precise</u>.
To check the <u>accuracy</u> we can compare the average value to the actual mass of the acetone.
Average of the acetone measurement is (0.7783+0.7780+0.7786)/3 = 0.7783g
The percentage of difference of the average measurement to the actual mass is = {(actual value-measured value)/actual value}x100%
={(0.7791-0.7783)/0.7791}x100%
=0.10%
So we can see the difference is very small ⇒ the measurement is accurate.
Answer:
The unpaired electron pair on central atom = 1
The central atom form 1 single bond 1 double bond with oxygen atoms.
Explanation:
Ozone, 
Valence electrons of oxygen = 6
Only the valence electrons are shown by dots in the Lewis structure.
The Lewis structure is shown in the image below.
From the Lewis structure, it can be concluded that:-
The unpaired electron pair on central atom = 1
The central atom form 1 single bond 1 double bond with oxygen atoms.
Answer:
(4) Inner core. (5) magma. (6) crust (7) Convection current. (8) energy waves
Explanation:
