The three isomers of pentane have different

(1) formula masses

(2) molecular formulas

(3) empirical formulas

(4) structural formulas

Devante buys a helium birthday balloon for his mom at the grocery store, where the temperature is a comfortable 72oF.

Which of the following combustion reactions is balanced correctly? A. C4H6 + 5.5O2 4CO2 + 3H2O B. C4H6 + 4O2 4CO2 + 3H2O C. C4H6 + 11O2 4CO2 + 3H2O D. C4H6 + 1.5O2 4CO2 + 3H2O

A nonaqueous solution has a solvent that is not water. Which is an example of a nonaqueous solution? paint steel orange juice shaving cream

HCL + NaOH → H2 + NaCl In which of these would the reaction rate be the quickest? A) A 1M HCl solution reacts with a 1M NaOH solution B) A 1M HCl solution reacts with a 2M NaOH solution C) A 2M HCl solution reacts with a 1M NaOH solution D) A 2M HCl

According to Reference Table M, what is the color of the indicator methyl orange in a solution that has a pH of 2? (1) blue (3) orange (2) yellow (4) red

Write the atomic number, atomic mass, number of protons, electrons and neutrons for the first five elements

Identify how the colligative properties of a solvent change when a solute is added, forming a solution.

The first experimental step after weighing and combining your salt/sand mixture is adding water to your mixture and stirring. After you have stirred for a few minutes, where are the SiO2 and NaCl, respectively?

What does homogeneous mixture of elements mean

Systems in nature tend to undergo changes towards? (1) Lower energy and less disorder (2) Higher energy and less disorder (3) Lower energy and more disorder (4) Higher energy and more disorder