NEED HELP ASAP Which expression can be used to change 75 kilometers per hour to meters per minute?
(1 km = 1000 m, 1 hr = 60 min)

1. 75 km/1 hr * 1km/1,000 m * 1 hr/60 min
2. 75 km/1 hr * 1km/1,000 m * 60 min/1hr
3. 75 km/1 hr * 1,000 m/1 km * 1 hr/60 min
4. 75 km/1 hr * 1,000 m/1 km * 60 min/1hr

Which of these is an intensive property of a substance

The diagram shows the relationship between scientific disciplines.the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a.physics b.biology c.chemistry d.metallurgy

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal