1. Which of the following parts allow different activities of the cell to happen? A cytoplasm
C vacuole
B. lysosome
D. vesicle

2. If the chloroplasts of a plant cell are damaged, which will it be unable to do?
A protect the cell
B. make food for the cell
C. excrete waste materials
D. give instruction for cell to reproduce

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

2b2t

explanation:

2b2t