Which of the pairs below would be the best choice for a ph 5 buffer? hf/naf, k a (hf) = 3. 5 × 10-4 hc2h3o2/kc2h3o2, k a (hc2h3o2) = 1. 8 × 10-5 nh3/nh4cl, k b (nh3) = 1. 8 × 10-5

The distance d that a car can travel in a certain amount of time t can be found by multiplying the rate of speed r by the travel time. if a car has already travel 4 miles, the formula for the total distance travel is d= rt + 4. which of the following gives the value of r, in terms of d and t?

If you find yourself sharing the road with an aggressive driver, you should: a. attempt to get the driver off the road b. give the driver extra space c. make eye contact and smile

Berikan satu kepentingan terhadap komposisi udara di atmosfera bumi