Each hour Jimmy makes 60min ÷ 10min/pizza = <<60/10=6>>6 Pizzas
The number of total pizzas made equals 7 hours x 6 pizzas/hour = <<7*6=42>>42 pizzas
The amount of total flour used equals 42 pizzas x 0.5 kg/pizza = <<42*0.5=21>>21 kg
The amount of flour left equals 22 kg - 21 kg = <<22-21=1>>1 kg
The number of pizzas Jimmy can make is 1kg ÷ 0.5kg/pizza = <<1/0.5=2>>2 pizzas
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