Can someone help me to answer this correctly, please, and explain it. Please answer these 2 short questions, I don't have more money to buy more questions. These 2 questions are different.

1. a.

1. b.

The boride Ta3B4 is made by the direct combination of tantalum and boron at high temperature. How much boron must react with excess tantalum to prepare 122g of Ta3B4 if the yield of the reaction is 92.4% ? grams B V2O3+H22VO+H2O The reaction of 404.4g of V2O3 with excess H2 yields 329.2g of VO. Calculate the theoretical yield of VO (assuming complete reaction) and its percentage yield. Theoretical yield = g Percentage yield = %