What are the units of specific gravity? Assuming that the density of water is 0.997 g.mL^-1 and the specific gravity of gold is 19.28 what is the density of gold in g.mL^-1? In pounds per cubic foot?

my attempt: no units for specific gravity. Density of gold in g.ml^-1 = 19.2 g/mL^-1 I have no idea how to convert to pounds per cubic foot?

4. The mass of the earth is 6.1 x 10^27 g and the radius is 6.4 x 10^6 m. What is the average density of the earth in g.mL^-1? Hint the volume of a sphere is 4/3 pie r^3 where r is the radius of the sphere.

my attempt:
2.6 x 10^19 g/ml^-1

5. The mass of a neutron is 1.675 X 10^-24 g. The radius is about 10^-15 m. What is the density of a neutron in g.mL-1? What assumption is being made about the structure of the neutron in this calculation?

my attempt: 4.2 x 10^ -45
assume the structure is a sphere?

Suppose you have a metal with a small volume (0.5mL) and a metal with a large volume (5.0mL). Which should give a higher percentage error if we use the water immersion method? explain.

my attempt: i would think less water would give a higher percentage error but not sure of the reasoning my guess the water not covering the metal throwing off the accuracy?

... a. 100 ml of liquid A has a mass of 250 g. What is its density, in kg/L? (Note: 1 L = 1000 ml = 0.001 m3) b. Liquid B has a specific gravity of 0.98. ...

... The specific gravity is defined as specific gravity = density/density of water. ...Density of the filament material = specific gravity x density of water. ...

... 1. density = mass/volume = m/(pi*r^2*l) = 15.70/(3.1415*1^2*5) = 1.00 g/cm^3 specific gravity = density of this sample/density of water = 1.00/1.00 = 1. ...

... drops from 18°C (65°F) to 10°C (50°F), the specific gravity of the water ... g = The acceleration of gravity. ... Ρw = The density of the carrying liquid (water). ...

... 2.5 Specific gravity of Water Sw = 1.0. Hence, Volume of sludge (in lit) Vs = (mw/Sw + mv/Sv + mf/Sf)*(0.4536) litre [NOTE: 1 lb == 0.4536 kg and density = S ...