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 is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?