This equation indicates that the reaction gives off heat. What is this type of reaction called? 2C4H10 + ? O2? 8CO2 + 10H2O + heat

a. an exothermic reaction

b. an endothermic reaction

c. absorption reaction

d. precipitation reaction

How much heat is required to raise the temperature of 65.8 grams of water from 31.5ºC to 46.9ºC? (The specific heat for water is 4.18 J/g·ºC)

In the following balanced reaction, what volume of a 3.0 M H2SO4 is required to completely neutralize 200.0 ml of a 2.5 M NaOH? H2SO4 + 2NaOH → Na2SO4 + 2H2O A. 200 ml B. 83 ml C. 50 ml D. 170 ml

How many moles are in 30.00 grams of H2PO4

How many total oxygen atoms are in lead (II) nitrate? * Pb (NO3) 2

How many grams of H are in H2O

A change of state requires the addition or removal of heat energy. True False

Trevor watches as a freight train passes. He counts eight identical black railroad cars, then a red car, followed by several more black cars.

How long does a hydrogen bond last in water

If the body temperature of a person is recorded as 37°c, what is the person's body temperature in k? round your answer to the nearest whole number.

Pf3cl2 is a nonpolar molecule. based on this information, determine the f-p-f bond angle, the cl-p-cl bond angle, and the f-p-cl bond angle. enter the number of degrees of the f-p-f, cl-p-cl, and f-p-cl bond angles, separated by commas (e. g.