A piston in a heat engine does 500 joules of work, and 1,400 joules of heat are added to the system. Determine the change in internal energy and explain how this example demonstrates the conservation of energy.

Solution X has a pH of 9.4, and solution Y has a pH of 7.4. a. What is the [H3O+] in the solution X? Express your answer using one significant figure. b. What is the [H3O+] in solution Y? Express your answer using one significant figure.

Which metallic crystal structure has 8 neighbor crystals

What is the temperature in Celsius of 308 K?

Which pair of ions can form an ionic bond with each other and why? A) Cu + and Ag+; They are both metal ions. B) S2 - and O2-; They have like charges. C) Br - and At-; They are both halogen ions. D) Li + and Br-; They have unlike charges.

Which method will be the best for separating the gasoline from crude oil? A - gas chromatography B - freezing C - Filtration with a paper filter D - Distillation

A flexible container is filled with 960.0 liters of air at 38 degrees Celsius. If pressure in the container does not change, at what temperature will the container have at a volume of 350.0 liters?

Which subatomic particles are paired with their charges? 1. electron-positive, neutron-negative, proton-neutral 2. electron-negative, neutron-neutral, proton-positive 3. electron-negative, neutron-positive, proton-neutral 4.

Where do you think information is coded in a DNA molecule?

The mole fraction of carbon dioxide in a gas mixture is. 200 there are also. 251 g of nitrogen and. 322 g of oxygen in this gas mixture what is the mass of arbon dioxide in this mixture

How do you do empirical formula