45. most abundant metal in the earth's crust

46. first discovered in light coming from the sun

What is the mass, in grams, of 2.75 L of CO2 gas

Z=20; 1s22s22p63s23p6 express your answer as an Ion

A 30.00 ml ba (oh) 2 solution of unknown concentration was neutralized by the addition of 32.83 ml of a 0.1382 m hcl solution. write the balanced molecular equation for the neutralization reaction between hcl and ba (oh) 2 in aqueous solution.

Which of these refers to atoms with the same atomic number but different atomic masses? a. These atoms have different numbers of protons. b. These atoms have different numbers of electrons. c. These atoms are isomers. d. These atoms are isotopes. e.

Which two elements show similarities in the pattern of chemical bonding?

Regalo puntos : v vengan a mi prros

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