How many calories of heat are needed to raise the temperature of a 5.0-gram sample of water by 15.0 degrees Celsius? (Remember, a calorie is the amount of heat required to
change the temperature of 1 gram of water by 1 degree Celsius.)

Which of the following statements is true about planck’s law

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?