Which species represents a chemical compound?

(1) N2 (3) Na

(2) NH4 + (4) NaHCO3

1) In what state or phase do most ionic compounds occur? A) Solid. B) Liquid. C) Gas. D) Plasma. 2) The compound CO is an example of a (n). A) salt. B) element. C) ionic compound. D) covalent compound.

Iron is extracted from fe 2o 3 by a reaction with carbon (c) at very high temperature. if you take 2.86 x 10 4 g of fe 2o 3 to react with 9.05 x 10 3 g of c, how many moles of fe 2o 3 will be used? 2fe 2o 3 + 3c → 4fe + 3co 2

How does a dam regulate and how does it work?

Aside from carbon and hydrogen, which are always present in organic molecules, what are some other substances they may contain?

A perfect cube of aluminum metal was found to weigh 20.00 g. the density of aluminum is 2.70 g/ml. what is the dimension of the cube

What would happen if you tried to sqeeze a gas into a smaller container?

Paint, paint thinners and some cleaning agents can weaken the shell of a hard hat and may eliminate

A 10 chunk of metal has a specific heat of 0.25 J/g ºC. The temperature is changed from 10ºC to 45ºC. How much heat is required?

In this reaction what is the correct coefficient for sodium chloride? pb (no3) 2? nacl → pbcl2? nano3

Classify each of the following as a path function or a state function. work energy distance traveled enthalpy heat