Which type of matter is composed of two or more elements that are chemically combined in a fixed proportion

Apply the ideal gas law to solve problems Question A sample of gas that contains 21.0 moles at a pressure of 78.0 atm with a temperature of 900. Khas what volume? • Use R = 0.08206 La for the gas constant.

In a certain city, electricity costs $0.13 per kW·h. What is the annual cost for electricity to power a lamp-post for 5.50 hours per day with (a) a 100.

How many moles are in 125g of water?

What is true of dufusion

Ammonia is a weak base because it produces ___ ions in solution

A 1 liter solution contains 0.227 M acetic acid and 0.302 M potassium acetate. Addition of 0.113 moles of sodium hydroxide will: (Assume that the volume does not change upon the addition of sodium hydroxide.)

How do newtons laws relate to egg drop project

Terrlel uses a microscope to look t slides of plant cells. he sees a cell with two nuclei that have visible chromosomes. which stage of cell division is this cell?

Read the following chemical equation. Fe (s) + O2 (g) → Fe3 + O2 - What most likely happens during this reaction? Iron loses three electrons. Iron gains three electrons. Oxygen loses two electrons. Oxygen gains two electrons.

What is a possible charge of an anion? +3 -2 0 +1