| A | B |
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| The decimal number 0.0000010 expressed in scientific notation is 1.0 × 10^6. | True or false |
| The mass of an object, 4.55 × 10-3 g, expressed in decimal notation is 0.000455 g. | True or false |
| The number 7.20 × 10^3 contains three significant figures. | True or false |
| The mass of an object depends on gravity. | True or false |
| Given that 1 inch equals 2.54 centimeters, then 1 cubic inch equals 16.387 cubic centimeters. | True or false |
| All solids have the same density. | True or false |
| The correct scientific notation for the number 0.00050210 is: | 5.0210 × 10-4 |
| The wavelength of blue light is 0.00000045 m. Express this wavelength in scientific notation. | 4.5 × 10-7 m |
| The correct multiplier for the prefix milli is: | 1 x 10-3 |
| An American nickel five cent coin has a mass of approximately 5 grams. Five grams is equivalent to which term? | 5000 milligrams |
| How many liters are in 333 mL? | 0.333 |
| Which of the following statements about matter is FALSE? | Matter is smooth and continuous. |
| Which of the following is NOT an example of matter? | heat from a burning candle |
| When methane(CH4) is burned with oxygen the products are carbon dioxide and water. If you produce 36 grams of water and 44 grams of carbon dioxide from 16 grams of methane, how many grams of oxygen were needed for the reaction? | 64 |
| When elements combine to form compounds, their properties only change slightly. | true or false |
| Life could not exist with just 91 elements if they did not combine to form compounds. | true or false |
| Although some substances we encounter in our routine lives are elements, most occur in the combined state. | True or false |
| The law of constant composition states: All samples of a given compound have the same proportions of their constituent elements. | True or false |
| The subscripts in a chemical formula represent the relative mass of each atom in a chemical compound. | True or false |
| The subscripts in a chemical formula do not change for a given compound. | True or false |
| Chemical formulas normally list the most metallic elements first. | True or false |
| Carbon dioxide is an example of a molecular compound. | True or false |
| Ionic compounds have a net charge of zero. | True or false |
| Ionic compounds always contain positive and negative ions. | True or false |
| The ionic compound that forms between Mg and O is MgO | True or false |
| The correct formula for calcium fluoride is CaF3. | True or false |
| Ionic compounds are usually made up of a metal and a nonmetal. | True or false |
| The ionic compound MgO is named manganese oxide. | True or false |
| Type II metal cations are usually found in the section of the periodic table known as the transition metals. | True or false |
| The phosphorous-to-hydrogen mass ratio is 10.2 for a compound. This ratio could correspond to the compound | PH3 |
| How many total atoms are in the formula Al2(CO3)3? | 14 |
| How many carbon atoms are in the formula Al2(CO3)3? | 3 |
| How many oxygen atoms are in the formula Al2(CO3)3? | 9 |
| How many of each type of atoms are there in the formula NH4C2H3O2? | N = 1, H = 7, C = 2, O = 2 |
| How many of each type of atom are there in the formula (NH4)2HPO4? | N = 2, H = 9, P = 1, O = 4 |
| What is the correct formula for a compound that has three oxygen atoms and one sulfur atom? | SO3 |
| Which among the following elements does NOT exist as a diatomic molecule in nature? | Ne |
| Carbon monoxide is considered which of the following? | molecular compound |
| What is the formula for an ionic compound made of barium and nitrogen? | Ba3N2 |
| The ionic compound that forms between potassium and oxygen | K2O |
| The charge of a vanadium ion in the compound V2O5 is: | 5+ |
| What is correct name of the compound whose formula is N2O4? | dinitrogen tetroxide |
| What is correct name of the compound whose formula is BF3? | boron trifluoride |
| A chemical bond is classified as a covalent bond if it involves the transfer of electrons. | true or false |
| Lewis theory predicts that the formula of a compound formed between bromine and aluminum is: | AlBr3 |
| Lewis theory predicts that the formula for a compound between fluorine and calcium is: | CaF2 |
| When a nonmetal bonds with a nonmetal | electrons ar shared, a covalent bond is involved,molecular compound forms. |
| Which molecule listed below has a polar covalent bond? | H2O |
| Which of the following statements is TRUE for the covalent molecule HCl? | Chlorine is more electronegative and the shared electron pair is likely to be found on the chlorine atom. |
| The electronegativity value for Mg is 1.2 and the value for O is 3.5. Based on these values, what type of bond is expected for a compound formed between Mg and O? | Ionic |
| When the elements are arranged in order of increasing number of protons, certain sets of properties recur periodically. | True or false |
