Give the correct number of significant digits for each of the following, 0.00456
ID: 1069883 • Letter: G
Question
Give the correct number of significant digits for each of the following, 0.00456 79000 2.782 Carry out the following operations and express the answers with the correct number of significant digits and units where appropriate. 6.719 mm times 3.8 mm 38.23 g + 10.1 g 23 6 10.03/30.0 ml Carry out the following conversions Useful information 1.8 times degree C = (F-32) 92.5 degree C to K 298 K to degree F 0.480 g to mg 3.75 L to ml As part of an experiment aimed at determining the-density of a Liquid, the following data was obtained. Find the density of the liquid using the data. Is density physical property of chemical property?Explanation / Answer
1) The significant figures indicates its measuring contribution. It includes all non zero numbers & excluding leading zero. a) 4, 5, & 6 b) 7 & 9 c) 2, 7, 8 & 2
2) a) 6.719 x 3.8 = 25.5322 mm. 2, 5, 5, 3, 2 & 2 are significant digits.
b) 38.23 x 10.1 = 386.123 g 3, 8, 6, 1, 2 & 3
c)23.6 - 10.3 = 13.3 / 30.0 g = 0.4433 4, 4, 3 & 3
3) a) 1 g = 1000mg, 0.480 g = 0.480 x 1000 = 480 mg
b ) 0o c = 273 K , 92.5 + 273 = 365.5 K
c) 1 L = 1000mL, 3.75 l = 3.75 x 1000 = 3750 mL
d) F = 9/5 ( 278 - 273 ) + 32
= 9/5 x 25 +32
= 225/5 +32
= 45 + 32 = 77 F
1B )
trial I trial II
Mass of unknown = total mass - mass of erlynmayer flask = 56.518 - 43.318 53.237 - 44.337
= 13.2 g = 7.9 g
Density = Mass / Volume 13.2 / 15 7.9 / 10
= 0.88 g/ml = 0.79 g/ml
Density is a physical property which can be observed without changing composition of compound.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.