The reaction: 2H2(g) + O2(g) 2H2O(g), can be interpreted as: a. 2 moles of hydro

ID: 574199 • Letter: T

Question

The reaction: 2H2(g) + O2(g) 2H2O(g), can be interpreted as:

a. 2 moles of hydrogen gas reacts with 1 mole of oxygen gas to produce 2 moles of water.

b. 2 grams of hydrogen gas reacts with 1 gram of oxygen gas to produce 2 grams of water.

c. 2 hydrogen atoms react with 1 oxygen atom to produce 2 atoms of water.

d. 4 hydrogen atoms react with 2 oxygen atoms to produce 2 water molecules.

e. All these options are correct.

6. Which of the following statement(s) is(are) true for ionic bonding?

a. The electrons are shared between the atoms.

b. There is a large electronegative difference ( 2.0) between the atoms.

c. The bonding that occurs is usually between two nonmetal atoms.

d. The bonding that occurs is usually between metal and nonmetal atoms.

e. A noble gas configuration is formed by each element or ion.

7. True or false? The greater the difference in electronegativity between two bonded atoms is, the less polar the bond. a. True b. False

8. In what type of reaction is water always a product?

a. precipitation

b. acid-base

c. oxidation-reduction

d. decomposition

e. combustion

5. 2H2(g) + O2(g) ---------------- 2 H2O(g)

according to the reaction

2 moles of H2 reacts with 1 mole 0f O2 to give 2 mole of H2O

2x 6.023x10^23 atoms of Hydrogen reacts with 6.023x10^23 atoms of Oxygen to give 2x 6.023x10^23 molecules of H2O

The answer is A

6) The asnwers are a),b), d) and e).

Ionic bond is formed between metal and a non-metal.

Ionic bond is formed when the elctronegativity difference between two atoms is greaterthan or equal to 2.

In the formation of ionic bond the two ions are getting inert gas electronic configation.

7) the answer is False.

More electronegativity difference between two atoms is Ionic bond or more polar bond.

8) acid-base reaction . The answer is B.

NaOH + HCl ----------------- NaCl + H2O

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