6) How many grams are in 11.9 moles of chromium? 7) How many moles are in 9.8 grams of calcium? 8) How many grams are in 238 moles of arsenic?

## Step 1:To find the number of grams in 11.9 moles of chromium, we need to multiply the number of moles by the molar mass of chromium. The molar mass of chromium is 52.00 g/mol.### **Number of grams = Number of moles * Molar mass**## Step 2:To find the number of moles in 9.8 grams of calcium, we need to divide the mass of calcium by the molar mass of calcium. The molar mass of calcium is 40.08 g/mol.### **Number of moles = Mass / Molar mass**## Step 3:To find the number of grams in 238 moles of arsenic, we need to multiply the number of moles by the molar mass of arsenic. The molar mass of arsenic is 74.92 g/mol.### **Number of grams = Number of moles * Molar mass**