What is the amount of heat, in joules, required to increase the temperature of a 49.5-gram sample of water from 22°C to 66°C?

(1) 9100 J

(2) 4600 J

(3) 1400 J

(4) 2300 J

All BUT one factor contributes to natural selection. That factor is A) mutation. B) population stability. C) environmental factors. D) differential reproduction.

What determines how many items make up a particular unit

a. Except for hydrogen (and Helium) how many electrons are contained in the valence shell of an atom after it has bonded? 2, 4, 6, 8, 10

Geneva was walking on the beach on a crisp November morning when a cool wind came her way. How would Geneva's body respond to maintain homeostasis? ) Intro Done

Identify the major force between molecules of pentane. dispersion dipole-dipole hydrogen bonding ion-dipole ion-ion

Which of the following statements is true? A. Particles of a solid have a very orderly, three dimensional arrangement and do not move B. Particles of a liquid change shape and volume C.

How does hess's law use intermediate reactions to calculate the enthalpy of a desired reaction?

Which atomic particle dtermines the chemical behaviour of an atom?

If you could travel to the Sun and back, about how far would you travel? A. 1 AU B. 2 AU C. 5 AU D. 10 AU

A scientist is conducting a descriptive experiment where she is monitoring sea level along coastal towns in California. What is a major benefit of this experiment? The relationship shows cause and effect. It is repeatable.