Classify each of the equations as synthesis, decomposition, or replacement.

a. 2 A1 + F → 2 Fe + A

b. 2 Ag + S → AS

c. CaC → CaO + C

d. 2 NO + → 2 N

The potential difference between two parallel plates 175 V. An α particle with mass of 6.5 * 10-27 kg and charge of 3.2 * 10-19 C is released from rest near the positive plate.

How many calories are required to raise the temperature of 75g of water from 20 ˚C to 50˚ C? A. 1.5x103 cal B. 2250 cal C. 2000 cal D. 75.0 cal

Examine the sets of bonds given in the choices. which one arranges the bonds in order of increasing (shortest to longest) bond length? examine the sets of bonds given in the choices.

Write the chemical equation for ionic reaction between nabr and agno3. b boldi italicsu underline bulleted list numbered list superscript subscript0 words

Which of the following molecules is nonpolar? 1. BF3 2. H2O 3. NF3 4. CH3Br 5. SO2

Which statement about neutrons is true? A. Neutrons travel around the nucleus of an atom. B. The number of neutrons in an atom always equals the number of electrons. C. Neutrons have less mass than electrons. or D. A neutron has no charge.

Of these gases, which has the fastest-moving molecules (on average) at a given temperature?

What is the oxidation number for zinc? How does zinc's electron configuration account for this oxidation number?

Which of the following experimental observations proved that the idea of matter and mass being evenly distributed in an atom was flawed? A. Less than 1% of the alpha particles went un-deflected through the gold foil. B.

Calculate the energy E of a sample of 3.50 mol of ideal oxygen gas (O2) molecules at a temperature of 310 K. Assume that the molecules are free to rotate and move in three dimensions, but ignore vibrations.