Che 1000 Practice Test 3

OCC AH Chemistry

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To answer the questions below click on the button which represents the correct response or enter a short answer. Then click "submit" to send your answers. Subscripts are not available. Exponents are represented by e and a number. Thus 1000 = 1e3 and 0.001 = 1e-3. When you enter a numerical answer, do not enter letters (like g, grams, mol etc).

When dissolved in water, the chemical formula H2S describes the compound called:

Your answer:
hydrochloric acid.
hydrosulfuric acid.
dihydrogen sulfide.
sulfuric acid.

Some elements form more than one polyatomic ion with oxygen. The sequence of prefixes and suffixes _ _, _, and _ are used in naming these compounds and represent compounds with an increasing number of oxygen atoms.

Your answer:
hypo, ite, per, ate
hypo, per, ite, ate
hypo, ite, ate, per
per, ate, ite, hypo

Avogadro's number is:

Your answer:
6.022e21
6.022e23
6.022e25
6.022e27

The element _____________ is the reference used to define the mole and allow calculation of molar masses.

Your answer:
hydrogen
silicon
oxygen
carbon

In the chromate ion ([CrO4]2-) oxygen atoms possess an electric charge of 2-, therefore the chromium atom must possess a charge of:

Your answer:
3+.
6+.
8+.
4+.

Give the IUPAC Stock name for TiO2. Spelling must be correct. Use Roman numerals to indicate the electrical charge of the metal ion in the name. Separate the words with a space.

Your answer:

Give the IUPAC Stock name for FeI2. Spelling must be correct. Use Roman numerals to indicate the electrical charge of the metal ion in the name. Separate the words with a space.

Your answer:

Give the IUPAC Stock name for SnF4. Spelling must be correct. Use Roman numerals to indicate the electrical charge of the metal ion in the name. Separate the words with a space.

Your answer:

Write the formula for magnesium hydroxide.

Your answer:

Write the formula for ammonium nitrate.

Your answer:

Write the formula for zinc dichromate.

Your answer:

Calculate the molar mass (in grams) of the compound Fe2(S04)3. You must use a Periodic Table of the Elements. Enter your answer to the nearest 0.1 gram.

Your answer:

Calculate the number of moles in 290 grams of butane, C4H10. You must use a Periodic Table of the Elements. Enter your answer to the nearest 0.1 mole.

Your answer:

Calculate the number of molecules in 440 grams of CO2. You must use a Periodic Table of the Elements. Enter your answer in scientific notation, accurate to the nearest 0.1.

Your answer:

If a compound has an empirical formula of CH2O and a molar compound mass of 240.0 g, calculate the molecular formula of this compound. You must use a Periodic Table of the Elements.

Your answer:

Calculate the mass percent of nitrogen in the compound Mg(NO3)2. You must use a Periodic Table of the Elements. Enter your answer to the nearest 0.1%.

Your answer:

Calculate the empirical formula of a compound containing 26.73% P, 12.08% N, and 61.19% Cl. You must use a Periodic Table of the Elements.

Your answer:

Chemical equations often incorporate abbreviations indicating states of matter or reaction conditions. With one, or a few words, write what the abbreviation s indicates.

Your answer:

Chemical equations often incorporate abbreviations indicating states of matter or reaction conditions. With one, or a few words, write what the abbreviation l indicates.

Your answer:

Chemical equations often incorporate abbreviations indicating states of matter or reaction conditions. What is the abbreviation for gaseous substance?

Your answer:

Balance the equation Al4C3 + H2O -> Al(OH)3 + CH4 and enter the correct whole number coefficient for H2O.

Your answer:

Balance the equation Al4C3 + H2O -> Al(OH)3 + CH4 and enter the correct whole number coefficient for CH4.

Your answer:

Balance the equation CH4 + Cl2 -> CCl4 + HCl and enter the correct whole number coefficient for CCl4.

Your answer:

Balance the equation Al + H2SO4 -> Al2(SO4)3 + H2 and enter the correct whole number coefficient for H2SO4.

Your answer:

Balance the equation C18H36O2 + O2 -> CO2 + H2O and enter the correct whole number coefficient for CO2.

Your answer:

Balance the equation C18H36O2 + O2 -> CO2 + H2O and enter the correct whole number coefficient for H2O.

Your answer:

Che 1000 Practice Test 3

OCC AH Chemistry

When dissolved in water, the chemical formula H2S describes the compound called:

Some elements form more than one polyatomic ion with oxygen. The sequence of prefixes and suffixes ___ ___, ___, and ___ are used in naming these compounds and represent compounds with an increasing number of oxygen atoms.

Avogadro's number is:

The element _____________ is the reference used to define the mole and allow calculation of molar masses.

In the chromate ion ([CrO4]2-) oxygen atoms possess an electric charge of 2-, therefore the chromium atom must possess a charge of:

Give the IUPAC Stock name for TiO2. Spelling must be correct. Use Roman numerals to indicate the electrical charge of the metal ion in the name. Separate the words with a space.

Give the IUPAC Stock name for FeI2. Spelling must be correct. Use Roman numerals to indicate the electrical charge of the metal ion in the name. Separate the words with a space.

Give the IUPAC Stock name for SnF4. Spelling must be correct. Use Roman numerals to indicate the electrical charge of the metal ion in the name. Separate the words with a space.

Write the formula for magnesium hydroxide.

Write the formula for ammonium nitrate.

Write the formula for zinc dichromate.

Calculate the molar mass (in grams) of the compound Fe2(S04)3. You must use a Periodic Table of the Elements. Enter your answer to the nearest 0.1 gram.

Calculate the number of moles in 290 grams of butane, C4H10. You must use a Periodic Table of the Elements. Enter your answer to the nearest 0.1 mole.

Calculate the number of molecules in 440 grams of CO2. You must use a Periodic Table of the Elements. Enter your answer in scientific notation, accurate to the nearest 0.1.

If a compound has an empirical formula of CH2O and a molar compound mass of 240.0 g, calculate the molecular formula of this compound. You must use a Periodic Table of the Elements.

Calculate the mass percent of nitrogen in the compound Mg(NO3)2. You must use a Periodic Table of the Elements. Enter your answer to the nearest 0.1%.

Calculate the empirical formula of a compound containing 26.73% P, 12.08% N, and 61.19% Cl. You must use a Periodic Table of the Elements.

Chemical equations often incorporate abbreviations indicating states of matter or reaction conditions. With one, or a few words, write what the abbreviation s indicates.

Chemical equations often incorporate abbreviations indicating states of matter or reaction conditions. With one, or a few words, write what the abbreviation l indicates.

Chemical equations often incorporate abbreviations indicating states of matter or reaction conditions. What is the abbreviation for gaseous substance?

Balance the equation Al4C3 + H2O -> Al(OH)3 + CH4 and enter the correct whole number coefficient for H2O.

Balance the equation Al4C3 + H2O -> Al(OH)3 + CH4 and enter the correct whole number coefficient for CH4.

Balance the equation CH4 + Cl2 -> CCl4 + HCl and enter the correct whole number coefficient for CCl4.

Balance the equation Al + H2SO4 -> Al2(SO4)3 + H2 and enter the correct whole number coefficient for H2SO4.

Balance the equation C18H36O2 + O2 -> CO2 + H2O and enter the correct whole number coefficient for CO2.

Balance the equation C18H36O2 + O2 -> CO2 + H2O and enter the correct whole number coefficient for H2O.

Some elements form more than one polyatomic ion with oxygen. The sequence of prefixes and suffixes _ _, _, and _ are used in naming these compounds and represent compounds with an increasing number of oxygen atoms.