how to solve with steps please

Use the factor label to solve the following problems in the space provided. Remember to show complete work and cancel all undesired units. 1. Write the conversion equivalence for urea molecules; CH4N2O in terms of mole-particlemass. 2. Calculate the number of moles of the indicated substance in each of the following samples: a. 41.5gMgCl2 b. 135gN2O c. 12.5gAr 3. A bottle contains 854 mols of bromine molecules, how many molecules of bromine are in this bottle? 4. 8.751026 Molecules of Bromine are produced by a company per day. What moles (amount) of bromine are produced by this company? 5. A chemical reaction requires 6.85 mols of glucose (C6H12O6). What mass of glucose should be measured to have the necessary amount of glucose? 6. A student dissolves 0.950g of iodine in water. What moles (amount) of iodine (I2) has the student dissolved in water? 7. What mass of glucose contains 5.571020 molecules of glucose (C6H12O6) ? 8. A urea sample obtained for bio experiments contains 8.09g of urea (CH4N2O) : a. How many molecules of urea are present in this bottle? b. How many atoms of hydrogen are in this sample of urea? 9. A student isolated about 5.24g of aluminum carbonate [Al2(CO3)3] from a precipitation reaction in the lab. Calculate: a. The molar mass of Al2(CO3)3 b. The number of formula units (FU) present in the above mass of Al2(CO3)3