Is this reaction endothermic or exothermic

d) NH4NO3 (s)  NH4 + (aq) + NO3 - (aq) [Note, this is the reaction that takes place in a cold pack]

Describe each step in the phase change diagram when Ice from - 25 C changes to 135 C

Which are most responsible for creating acid rain pollution? A nuclear power plants B coal-burning power plants C hydroelectric power plants D wood-burning power plants

Tony was diagnosed with skin cancer. His children are worried that they might have skin cancer too. As Tony's doctor, you must break the news to his children. Which of the following would be accurate? a.

Some of the interrelated factors which affect polar ice are:

Which answer below correctly identifies the changes you observed and the explanation when a candle burns?

A living thing that cannot make its own food and must eat other living things for energy

Which best explains why astronauts appear weightless when they are in a space shuttle orbiting Earth? • They are falling toward Earth at the same rate as the space shuttle.

If increase the amplitude how does the velocity change? (No google)

What is the result of multiplying (2.5 * 1010) * (3.5 * 10-7) ? Use the correct number of significant digits.

What is 0.002353 to two significant figures