A particular compound has the empirical formula CH2O. its molar mass is 240.0 g/mol. predict the molecular formula for this compound.

True or false: atoms have the same number of electrons as they have protons

How many energy sublevels are in the second principal energy level?

Consider the general reaction: 2 A + b B → c C and the following average rate data over a specific time period / Delta t: - / frac{ / Delta A}{/Delta t} = 0.0080 mol L-1 s-1 - / frac{ / Delta B}{/Delta t} = 0.

Which of the statements below is not a characteristic of economically developed nations? 1. access to health care 2. high standard of living 3. industrialization 4. reduced use of resources

All atoms of an element all have the same number of electrons protons neutrons

Use the balanced equation from number four above to determine the limiting reactant if we had a mixture of 5.0 moles of Fe and 4.0 moles of O2.

Using the kinetic theory what happens to oxygen particles as they are cooled

Identify the following: 1. The only 2 liquid elements. 2. The element in period 4, group 0. 3. The second metalloid in period 4. 4. The first element in group 4A.

You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." the soy milk is most likely a

Give reason: a. Fractionating columns with beads are used for fractional distillation b. Crystallisation is a better technique than evaporation