Answer : The mass of 5.0 moles of ribose is 750 grams.
Explanation : Given,
Moles of ribose = 5.0 moles
Molar mass of ribose = 150 g/mole
Formula used :
![\text{Mass of ribose}=\text{Moles of ribose}* \text{Molar mass of ribose}](https://img.qammunity.org/2020/formulas/chemistry/college/ggmlw3wflpachjao4kmn0n9l71mwpus4z6.png)
Now put all the given values in this formula, we get:
![\text{Mass of ribose}=5.0mole* 150g/mole=750g](https://img.qammunity.org/2020/formulas/chemistry/college/esfke4p4ij8uo5dekhv07izdq6c17qg8jg.png)
Therefore, the mass of 5.0 moles of ribose is 750 grams.