Measuring in Chemistry

Determine the number of significant digits.

a) 0.0157 g ________________

b) 700 m ________________

c) 508,987 mm ________________

d) 1.2 x 10³ ________________

e) 25 computers ________________

Round the following to the specified degree of accuracy. (4 pts)

8.696 to 2 significant figures ___________________

0.39888 to 3 significant figures ___________________

66.279 to 1 significant figure ___________________

279.09558 to 2 significant figures ___________________

Use the conversion factor to solve the following:

Mrs. Rodríguez is visiting Japan. She wants to buy a Kimono to take back home. She has $500 US and the kimono costs 475 yens, will she have enough money to buy one? Conversion factor (1 Japanese Yen = 0.0095 US Dollar)

Use a Conversion factor to solve the following.

1.9 x 10⁵ mg = __________ dg

14.8 g = __________ µg

6.6 x 10³ mm = __________ Dam

The SI units of measurement for the following are:

mass ___________________________

volume _________________________

length or distance ________________________

time ________________________

amount of matter ________________________

temperature

Convert the following numbers into standard notation. (6 pts)

a) 7.4 x 10^-5 ____________________

b) 5.76 x 10⁰ ____________________

c) 4.11 x 10³ ____________________

Convert the following numbers into Scientific notation. (4 pts)

a) 0.0157 g ________________

b) 700 m ________________

c) 508,987 mm ________________

d) 1.2 ________________

Solve the following problems. (10 pts)

10⁸ x 10⁴ = _______________________

10 ⁹/10² = _______________________

10⁸/10 ^{- 4} = _______________________

10⁰ + 10¹ = _______________________

10^{5 -} 10³ = _______________________

Is this image of a bee sting a physical or a chemical change?

• Physical change

• Chemical change

Is this image of crushing ice a physical or a chemical change?

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-4