Answer:
C
Explanation:
This is essentially one of the several safety measures in the chemical laboratory. This particular approach is one used in the case of fire eventualities.
A is wrong
This is because in the advent of a fire incident, it is necessary to evacuate the building as a whole. Meeting in the hallway is still within the building which is not the right thing to do when there’s a fire outbreak. Occupants are expected to leave the building immediately
B. Is also wrong. Taking time to pack your belongings might make you be caught in the inferno. It is expected that you leave the building at once
No. (Just have to max out 20 characters.)
Answer:
Percentage error =
x 100%
Explanation:
In order to calculate the percentage error in the student's calculation, the following formula will be used:
Percentage error =
x 100%
experimental molar mass = 64 g/mol
theoretical molar mass = 58 g/mol
Hence, the expression becomes:
Percentage error =
x 100%
Calcium. this is because Mg and calcium is in the same group. hence, they have similar chemical properties