Answer:Percent error= 90.9%
Explanation:
Percent error or percentage error is defined as the percentage of the difference between a measured value usually from an experiment and an exact value in comparison to the exact number.
its formula is thus
Percent error = experimental value - exact or actual value /exact value x 100
=(18.9 - 9.9 /9.9 ) x 100= 9/9.9) x 100
0.909 x 100 = 90.90 = 90.9%
Ionic crystals are hard because of tight packing lattices, say, the positive and negative ions are strongly attached among themselves.
A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
Answer:
Explanation:
Balanced forces are opposite in direction and equal in size.
Balanced forces are in a state of equilibrium.
Answer:
Line 3 is incorrect
Explanation:
In line 3, the statements should be switched. Chemical reactions involve small amounts of energy and nuclear reactions involve enourmous amounts of energy. Lines 1 and 2 are correct.
VOTE ME FOR BRAINLIEST!!
