Chapter 1 Grade 12 SABIS Chemistry Quiz 1

In which of the following are the zeros not significant: 0.1 cm, 1.0 cm, 1.01 cm, 10 cm?

• 0.1

• 1.0

• 1.01

• 10

refers to the degree of agreement among several measurements of the same quantity.

refers to the agreement of a particular value with the true value.

error: means that a measurement has equal probability of being high or

low.

• Random

• Systematic

error: occurs in the same direction each time; it is either always high or

always low.

• Random

• Systematic

are numbers that were not obtained using measuring devices, they are numbers

obtained by counting, in formulae or in definitions

• exact numbers

• intact numbers

• octet numbers

• proactive numbers

nonzero numbers are always significant

• True

• False

zeros between nonzero numbers are never significant

• True

• False

zeros before nonzero numbers are always significant.

• True

• False

Zeros to the right of a number are always significant

• True
• False