5. Read these cell observations. In the space next to each answer choice, write whether the cells described are prokaryotic cells, animal cells, plant cells,
or there is not enough information to determine.
A. Cell has a membrane and ribosomes.
B. Cell has many chloroplasts.
C. Cell has a cell membrane and mitochondria but no cell wall.
D. Cell has a nucleus.
E. Cell has a nucleus and cell m

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

personal, she chose to do it.

i wish i could but this one is weird give me abc and i can solve it.