Indicate whether the following represents a Chemical or Physical change: Gasoline burns in air

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