Which of the following equations describes a single-replacement reaction?

A. 2N2O5 (g) = O2 (g) + 4NO2 (g)

B. 2Na (s) + Cl2 (g) = 2NaCl (s)

C. Cl2 (g) + 2Kl (s) = 2KCl (s) + l2 (g)

D. H2 (g) + Br2 (g) = 2HBr (g)

Indicate whether each statement about the nucleus of an atom is true or false. 1. The nucleus of an atom is neutral. The nucleus of an atom contains only neutrons. 2.

Considering only specific heat, would be the most ideal for use in cookware. Aluminum Copper Iron Lead

Calcium hydride reacts with water to form hydrogen gas according to the unbalanced equation below: CaH2 (s) + H2O (l) - -> Ca (OH) 2 (aq) + H2 (g) This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple,

The particle that adds mass but no charge to the atomic nucleus is the

A narrow black line at the base of a canyon is likely to be a

Internal respiration is the transfer of oxygen and carbon dioxide from the lungs to the tissue cells of the body. True or False

Which element is a metalloid? 1. Al 2. Ar 3. As 4. Aa

You move a 25N object 4 meters. Find the work you did

What is the relationship between matter and elements

Which of these would be an appropriate way to describe the concentration of orange candies? Check all that apply the number of orange candies divided by total number of candies the mass of orange candies divided by total mass of candies the volume