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NaCl: 2.3 moles
KCl: 1.6 moles
MgCl2: 2.6 moles
#### NaCl: 2.3, KCl: 1.6, MgCl2: 2.6
A car travels 150 kilometers at an average speed of 75 km/h, then continues another 200 kilometers at 100 km/h. What is the total time spent traveling?
Time for first segment: \( \frac{150 \text{ km}}{75 \text{ km/h}} = 2 \text{ hours} \)
Time for second segment: \( \frac{200 \text{ km}}{100 \text{ km/h}} = 2 \text{ hours} \)
Total time: 2 hours + 2 hours = 4 hours
#### 4 hours
A scientist is studying bacterial growth. A culture starts with 500 bacteria, and the population doubles every hour. How many bacteria are present after 5 hours?