When does a change in energy occur?

1. In some physical changes, but not all.

2. In every physical change, but not in a chemical change.

3. In every chemical or physical change.

For the reaction 2 s (s) + 3 o2 (g) → 2 so3 (g), how much so3 can be produced from 4 g o2 and excess s? 1. 0.25 mol so3 2. 0.13 mol so3 3. 0.06 mol so3 4. 0.08 mol so3 5. 0.17 mol so3

As more bulbs are connected in series in a circuit, what happens to the brightness with which each glows?

What is the symbol for resistance?

What is the change in entropy when 0.210 mol of potassium freezes at 63.7°C? (ΔHfus = 2.39 kJ/mol) kJ/K

Which traits did Meiolania have

Table salt is formed when an electron is transferred from a sodium atom to a

Convert 45 joules to heat calories

What is 450 g of flour a measure of? A) Weight B) Inertia C) Gravity D) Mass

List the four (4) ways you can tell that a chemical reaction has occurred.

A student has 2.99 g of Potassium Permaganate. How many mL of a. 532 M solution can the student make? How does one solve this?