CHE 111 C1--Matter And Measurement: Question Preview (ID: 9350)

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Sugar water is an example of a(n)
a) element
b) compound
c) heterogeneous mixture
d) homogeneous mixture

Burning is a * change, and boiling is a * change.
a) chemical, physical
b) physical, chemical
c) physical, physical
d) chemical, chemical

Properties that do not depend on the amount of a sample are
a) intensive
b) extensive

The SI unit of mass is
a) g
b) cg
c) mg
d) kg

If measurements agree with each other, but not the "true value" they are
a) accurate but not precise
b) precise but not accurate
c) neither accurate nor precise
d) both accurate and precise

How many significant figures are in the measurement 0.0120g?
a) 5
b) 4
c) 3
d) 2

Choose the answer to (6.221cm - 5.2 cm) with the proper number of significant figures.
a) 1.021 cm
b) 1.02 cm
c) 1.0 cm
d) 1 cm

Find the density of a metal bar has dimensions of 5.0 cm x 2.00 cm x 2.0 cm and a mass of 300.0 g. Use proper sig-figs.
a) 1.5 x 10^1 g /cm3
b) 15.0 g / cm3
c) 0.15 g / cm3
d) 1.5 x 10^-1 g / cm3

How many ng are in 1 gram?
a) 1 x 10^6
b) 1 x 10^-6
c) 1 x 10^9
d) 1 x 10^-9

How many mg are equal to 55 kg?
a) 5.5 x 10^7
b) 5.5 x 10^-5
c) 5.5 x 10^5
d) 5.5 x 10^-7

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