Chem Unit 7 Test Flashcards

Significant figure(s)

Digits in a number that contribute to its precision, including all non-zero digits, zeros between significant digits, and trailing zeros in a decimal.

Accuracy

How close a measured value is to the actual (true) value.

Precision

The repeatability or consistency of measurements, regardless of their accuracy.

% error calculation equation

% Error = [(Measured Value - Accepted Value) / Accepted Value] x 100.

Density equation

Density = Mass / Volume.

Giga

A metric prefix meaning 1 billion (10^9).

Mega

A metric prefix meaning 1 million (10^6).

Kilo

A metric prefix meaning 1 thousand (10^3).

Centi

A metric prefix meaning 1 hundredth (10^-2).

Milli

A metric prefix meaning 1 thousandth (10^-3).

Micro

A metric prefix meaning 1 millionth (10^-6).

Nano

A metric prefix meaning 1 billionth (10^-9).

1 mL = ? cm³

1 mL = 1 cm³.

km to mi conversion

1.6 km = 1 mi.

Cm to In

2.54 cm = 1 in.

1 year = ? days

1 year = 365.25 days.

1 month = ? days (on average)

1 month = 30 days (on average).

1 week = ? days

1 week = 7 days.

1 day = ? hr

1 day = 24 hr.

1 hr = ? min

1 hr = 60 min.

1 min = ? sec

1 min = 60 sec.

1 foot = ? inch

1 foot = 12 inches.

1 yard = ? feet

1 yard = 3 feet.

1 mile = ? feet

1 mile = 5280 feet.

454 grams = ? lb

454 grams = 1 lb.

2.2 lbs = ? kg

2.2 lbs = 1 kg.