Select the correct answer.

Which compounds are acting like Brønsted-Lowry acids in the following acid-base equilibrium?

HCO3 - + H2O H2CO3 and OH-

A.

H2O and OH-

B.

HCO3 - and OH-

C.

H2O and H2CO3

D.

HCO3 - and H2CO3

In an internal combustion engine, platinum speeds up the oxidation of carbon monoxide to carbon dioxide. Platinum is needed for the reaction, but is not used up in the reaction.

Trenton collects a sample of moist air. One of these factors is unrelated to the amount water vapor in his sample. Which factor is it? A. Pressure B. Temperature C. Vapor density D. Volume E. Wind speed

Is water compressible?

How many protons, neutrons, electrons, does isotope number 19 and mass of 39?

A piece of copper with a mass of 218 g has a heat capacity of 83.9 j/°c. what is the specific heat of copper?

In any chemical compound the elements are always combined in the same proportion by__. a) charge b) mass c) volume d) density

Which would exhibit characteristics of both a metal and a nonmetal? select one: a. si b. ge c. sb d. po e. all of the above exhibit characteristics of both a metal and a nonmetal?

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.

Which of the following is the most likeley example of an favorable mutation A. A mutation that makes a rabbit able run faster B. A mutation that changes the rabbit's fur to bright orange C. A mutation that changes the color of the rabbit's eyes D.

Which of these mole ratios is possible for this reaction? FeCl3 + 3NaOH → Fe (OH) 3 + 3NaCl 1:1 1:3 3:1 2:3