Module 1 Review

Module 1 Vocabulary Mass is measured ingrams Mass measure of the amount of substance in an object weight measure of the gravitation pull of earth on an object Volume is measured in liters chemistrythe study of matter volume measure of the amount of space occupied Distance is measured inmeters precision indication of the scale on the measuring device that was used metric systemsystem of standard units density a measure of the amount of mass per unit volume accuracy indication of how close a measurement is to the true value matter anything that has mass and takes up space

Unit Conversions  1kg=1000g  1hg=100g  1Dg=10g  10 dg = 1g  100cg = 1 g  1000 mg = 1g

Significant Figures Rule 1 Non zero numbers are always significant 267 has 3 Sig. Figs Rule 2 Beginning zeros are never significant has 1 Sig. Fig Rule 3 Middle Zeros are always significant has 5 Sig. Figs Rule 4 Ending zeros only with a decimal are significant has 5 Sig. Figs Sig. Figs

Scientific Notation  Standard Scientific Your answer will always be between 1-9    If you have a small number, the exponent will be negative would be written as 6.5 x 10‾ ⁵ If you have a large number, the exponent will be positive 2,240,00,000 would be written as 2.24 x 10 ⁹

Scientific Notation If the exponent is negative move the decimal to the left 6.5 x 10‾ ⁵ would be written as If the exponent is positive move the decimal to the right 2.24 x 10 ⁹ would be written as 2,240,00,000

Density Volume Mass  1. Find the density of a piece of concrete of 6.120kg has a volume of 90 L  Formula for density d=m/v  ? Density  what do I know  m=6120 v=90l  2. Find the density of a block that has a mass of 108g and measures 2.0cm x 2.0cm x 9.0cm  Formula for density d=m/v  ? Density  what do I know  m=108g volume=36cm³  3. If the element Bismuth (Bi) has a density of 9.80g/cm³, what is the mass Of 3.74 cm³ Formula for mass m=d * V ? Mass what do you know? Volume = 3.74 cm³ density 9.80g/cm³

Density Volume Mass  4. Magnesium (Mg) has a density of 1.74g/mL. What is the volume of 56.6g  Formula for volume v=m/d  ?volume  what do I know  d=1.4g/ml, m=56.6g  5. An object with a mass of 18.73g is placed in 15.5 mL of water. The water rises to 19.0mL. What is the objects density?  Formula for density d=m/v  Calculate the water displacement 19.0 ml – 15.5 ml  ? Volume  what do I know  m=18.73g v=19.0mL – 15.5 mL

Practice problems

 7. Convert the following numbers into scientific notation  A x 10²  B x 10‾ ⁴  C. 6,100, x 10 ⁶  D x 10‾¹  8. Convert the following numbers back into decimal  A x 10³6540  B x 10‾³  C x 10 ⁷ 35,600,000  D x 10‾ ⁷

Practice problems