Show:
Scientific Notation/ Temperature
Significant Digits
Metric Conversions
Molar Conversions
Density
100
Put the following number into scientific notation: 3,789,000,000
3.789 x 10^9
100
How many significant digits are in the following number: 0.002708
4
100
Convert 200L to mL
200L x 1000mL/1L = 2x10^5
100
How many atoms in 2.36 mol of Al?
2.36mol x 6.022 x 10^23 atoms/1mol = 1.42E24
100
What is the formula for density?
D = m/v
200
Convert the following number to standard notation: 2.33 x 10^-6
0.00000233
200
Round the following number to 3 sig figs: 48776
48800
200
How many hectometers are in 1 mm?
1mmx 1m/1000mm x 1hm/100m = 1x10^-5
200
How many moles in 24g Si?
24g Si x 1mol/28.09g Si = 0.85 mol
200
What is the density of an substance with a mass of 4.0 grams and a volume of 15mL
4.0g/15ml = 0.27g/mL
300
Convert the following temperature to Kelvins: 25 degrees celsius
25 + 273 = 298 K
300
Round the following number to 2 sig figs, and then put it into scientific notation: 9456700000000
9.5 x 10^12
300
Convert 4.77 hm to cm.
4.77hm x 100m/1hm x 100cm/1m = 47700
300
How many atoms in 46.2g of Br?
46.2 g Br x 1mol Br/79.90g Br x 6.022E23 atoms Br/ 1mol Br = 3.48 x 10^23 atoms
300
You have an object with a density of 0.98g/mL. The mass of this object is 60g what is it's volume in mL?
60g x 1mL/.98g = 61mL
400
Convert the following number to scientific notation, and then round to 2 significant figures: 0.0000000043558
4.4 x 10^-9
400
Solve the following problem: 3.14g / 12.56 mL
0.250g/mL
400
Convert 6.7E11 microliters to decaliters (daL).
67 daL
400
You have 5.79E25 atoms of Ti, how many grams is this
4.60x10^3 g Ti
400
You have an object with a mass of 525g and a density of 3.05g/mL. What is it's volume in liters?
525g x 1mL/3.05g x 1L/1000mL = .172L
500
Convert the following temperature to degrees celsius: 324 K
324 K - 273 = 51 degrees celsius
500
Solve the following problem. Round the answer to the right number of sig figs (13.5 + 2.496) x 4.5
72
500
If a cube of metal has a density of 20.g/cm^3 and one edge of the cube is 5.0cm in length, what is the mass of the cube?
V = (5cm)^3 = 25cm^3 125cm^3 x 20g / 1cm^3 = 2500g