There is none.
A microgram per cubic metre is a measure of density while a micron is a measure of length or distance. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.
.75 diameter? What units? 0.75 microns? 0.75 kilometres?
Assume that the particles are spherical in shape with a diameter of 1 micron; that is, a radius of 0.5 microns. Each particle therefore has a volume of 0.5236 cubic microns, approx. Now the volume to be filled is 1 cm3 = (104 microns)3 = 1012 cubic microns. The highest density that can be achieved for sphere packing is pi/sqrt(18) so the maximum volume that the spheres can occupy is pi/sqrt(18)*1012 cubic microns = 7.405*1011 cubic microns. At 0.5236 cubic microns each, this represents 1.4142*1012 particles or sqrt(2)*1012 of them.
That would depend what the material is.
Multiply cubic feet by 0.0283 to get cubic meters.
100 cubic feet = 2.83 cubic meters
You can convert cubic feet to cubic meters, or feet to meters. But you can't convert cubic feet to meters.
103 = 1000 (cubic meters).103 = 1000 (cubic meters).103 = 1000 (cubic meters).103 = 1000 (cubic meters).
251521.0224
1-2 cubic meters in a foot1 cubic foot = 0.0283168466 cubic meters
There are 45,000 cubic centimeters in 0.045 cubic meters.
There is no direct conversion. Cubic meters is volume and square meters is area.
784 cubic inches is 0.01285 cubic meters.