Unit 1 Test Wrong Questions

which piece of equipment be used to measure 10mL of liquid?

beaker

which piece of equipment used to hold small amount of liquid that needs to be heated over a Bunsen burner?

a test tube

the zero is significant when..

“sandwiched” zero

numbers in scientific notations only count the sig figs of the..

first numbers

(256g +1.15g)/12.00mL

21.4 g/mL

3.11 X 10 over 3 g/ 3.4 X 10 over -8 cm cubed

9.1 X 10 over 10 g/cm cubed

(8.2X10 over 3) + (4.0 X 10 over 3)

12200

12.00 m + 15.001 kg

can’t add m and kg

if measurement falls in between two lines, the.. has to be..

last digit, estimated

if a measurement falls on a line, the… has to be..

last digit, 0 (zero)

…readings have to have.. extra decimal place than the increment

Precise, one

for.. you can’t put a negative in front of your answer

percent error and percent yield

order units from increasing size: dm, cm, km, m, Mm, hm

Millimeter (mm) < Centimeter (cm) < Meter (m) < Kilometer (km)

a. cm,dm,m,hm,km,Mm

centi-, milli-, micro- =, kilo-, mega- =

make a unit smaller, make a unit larger

equation for percent error

(theoretical-actual)/ actual for bigger - smaller