In the figure below, label “a” is a _________ cell (name the cell, not the organelle).  

It is relatively easy to change the temperature of a substance that a. is very massive. b. is an insulator. c. has a high specific heat capacity. d. has a low specific heat capacity. e. is brittle.

What is the atomic symbol for an element that has 30 neutrons and a mass number of 55? a. At b. Zn c. Co d. Mn e. Cs

A gas sample is heated from -20.0°C to 57.0°C and the volume is increased from 2.00 L to 4.50 L. If the initial pressure is 0.140 atm, what is the final pressure? a. 0.0477 atm b. –0.177 atm c. 0.411 atm d. 0.242 atm e. 0.0811 atm

Use VSEPR theory to predict the molecular geometry around the carbon atom in formaldehyde, H2CO. a. linear b. bent c. trigonal-planar d. tetrahedral e. octahedral

Which of the following equations is not balanced? a. 2Sb2OS2 + 10O2 → 2Sb2O5 + 4SO3 b. (NH4)2Cr2O7 → N2 + 4H2O + Cr2O3 c. C12H22O11 + 12O2 → 12CO2 + 11H2O d. 2NaCl + Pb(NO3)2 → PbCl2 + 2NaNO3 e. Fe3O4 + 3CO → 3Fe + 3CO2

Iron(III) oxide can be reduced by carbon monoxide.           Fe2O3(s)   +   3CO(g)  

Arrange the gases—F2, Ar, and CH3F—in order of increasing standard entropy (S°) at 298 K.

Which of the following pass high-energy electrons to the electron transport chain?

The products of photosynthesis are the