Without the size opf the block, if is not possible tell the weight,
The answer will depend on the size of the concrete block!
Concrete block.
The answer depends on how much of the block is hollow.
Basic concrete block it 8x8x16 inches.
There are 10 concrete block per m2.
concrete block
A concrete block is made from concrete, a brick block is made from brick. They are two different building materials. Both have their respective advantages and disadvantages.
It weighs 59 lbs. There is a difference between a "real" cinder block and a concrete block. A cinder block uses cinders--ash from the burning of coal--as its aggregate. Concrete blocks are made from concrete. Concrete block is far stronger than is cinder block, and some jurisdictions prohibit the use of cinder block. The only justification for cinder block is that it weighs less than concrete block, which is important if the ground you're building on isn't strong enough to support a heavy structure. This justification has gone away, because now you can buy concrete block made from expanded-shale aggregate that's as light as cinder block and as strong as standard-weight concrete masonry.
A concrete block is normally 8 inches high so that an 18 concrete block wall is 12 feet high.
classification of concrete blocks
what is the weight of concrete block work per cubic meter.