Which of the following is a single-replacement reaction?

a. cacl2 + na2co3 caco3 + 2nacl

b. h2 + cl2 2hcl

c. 2agno3 + cu 2ag + cu(no3)2

d. ch4 + 2o2 co2 + 2h2o

The excretory system,need answers for all: )

A650 ml sodium bromine solution has a bromide ion concentration of 0.245 m. what is the mass (g) of sodium bromide in solution? a) 103.b)0.00155.c)16400.d) 16.4.e) 0.159

How many moles are contained in 5.6 l of h2 at stp