Which is the best description of what happens in a chemical reaction? A. Atoms rearrange. B. Atoms change into other atoms. C. Matter is destroyed. D. Matter is formed.

Calculate the pH of a solution having the following ion concentrations at 298 K. [H+] = 4.6 * 10^-2 M

Signs that say "do not use near an open flame" refer to a

What does synthesis gas (water gas) consist of? a. oxygen (O2) and hydrogen (H2) b. methane (CH4) and water (H2O) c. carbon dioxide (CO2) and hydrogen (H2) d. carbon monoxide (CO) and hydrogen (H2)

What is the number of moles of NaOH in 26.5 mL of 0.500 Molar NaOH? 53.0 moles 13.3 moles 0.0189 moles 0.0133 moles

The pka of hypochlorous acid is 7.530. a 54.0 ml solution of 0.114 m sodium hypochlorite (naocl) is titrated with 0.337 m hcl. calculate the ph of the solution

100 ml oxygen at 1.75 atm and 200ml nitrogen at 0.6 atm are passed to a 500 ml vessel. Calculate the total pressure of the mixture in the vessel at same temperature

Which is the best metal to use in an alloy to increase its electrical conductivity

Ice does not need to melt into liquid water before it can return to the atmosphere as water vapor. a. True b. False

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?