Write and balance the following equations. IDENTIFY the type of reaction for each.
(a) potassium + diboron trioxide → potassium oxide + boron
(b) aluminum sulfide + barium phosphide → aluminum phosphide + barium sulfide
(c) tricarbon octahydride + oxygen → carbon dioxide + water
(d) cesium
+ nitrogen → cesium nitride

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?