Complete the lewis dot structure for h2co (in which both h atoms are bonded to c).

The chemical formula for cesium oxide is Cs2O. What is the charge of cesium?

On a mission to a newly discovered planet, an astronaut finds gallium abundances of 61.29% for 69Ga and 39.71% for 71Ga. What is the atomic mass of gallium for this location? The mass of 69Ga is 68.7200amu. The mass of 71Ga is 70.9200amu.

How many moles of oxygen must be placed in a 3.00 L container to exert a pressure of 2.00 atm at 25.0°C? Which variables are given?

Why do we study heat in a chemistry course?

Which sample contains a total of 3.0 x 10^23 molecules? Select one: a. 80 g of Br2 b. 4.0 g of He c. 4.0 g of H2 d. 14 g of Li

Write a net ionic equation for the overall reaction that occurs when aqueous solutions of phosphoric acid (h3po4) and potassium hydroxide are combined. assume excess base. use the pull-down boxes to specify states such as (aq) or (s).

What are the coefficients that will balance the skeleton equation below? n + h ⟶ nh?

Restate Newtons first law in terms of acceleration

Why is burning is not a recommended method of disposing plastics

Why do cells have a plasma membrane? A. to separate protein from the nucleus B. to distinguish plants from animals C. to define the size of the cell D. to separate the inside of the cell from its enviroment