1837226
Descripción
Fichas por mellowsmiley122, actualizado hace más de 1 año
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Creado por mellowsmiley122
hace casi 10 años
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| Pregunta | Respuesta |
| The pH of a nearby stream is tested and found to be basic. What pH could be a valid result from the testing of the stream? | Greater than 7 |
| Which mixture can be classified as a solution? A. air B. fruit salad C. H2O D. liquid nitrogen | air |
| How many total atoms are found in one molecule of H2O? | 3 |
| Which method of separation can be used for a heterogeneous mixture? A. by distillation B. by densities C. by chromatography D. by acidification | Densities |
| What only happens during a chemical reaction? | New substances are formed |
| What describes a process where a precipitate is formed? A. A solution of AgNO3 is added to a solution of CaCl2 to produce solid AgCl and a solution of CaNO3. B. Propane gas combusts to form CO2 and H2O. C. A solution of HCl mixes with a solution of Ca(OH)2 to produce H2O and CaCl2. D. A solution of H2SO4 mixes with a solution of NaOH to produce water and Na2SO4. | A solution of AgNO3 is added to a solution of CaCl2 to produce solid AgCl and a solution of CaNO3. |
| Which chemical equation describes the balanced reaction between magnesium and hydrochloric acid to form magnesium chloride and hydrogen gas? | Mg + 2HCI -> MgCI2 + H2 |
| What are the reactants in a cellular respiration? | The material needed for the process: Glucose and oxygen |
| What are the products in a cellular respiration? | the materials produced during the process: carbon dioxide and water |
| What is the properly balanced equation that shows the synthesis of limewater, Ca(OH)2, from calcium oxide and water? | CaO + H2O → Ca(OH)2 |
| What is the base of a Ph scale? | Any number greater than 7 |
| What is the correct formula for hydrogen gas? | H2 |
| What is the solutes in a simple mixture? | the substance that can be dissolved |
| What is the solvent in a simple mixture? | the mixture that is the one doing to dissolving, ex. water |
| Is the equation KMnO4 + HCl → KCl + MnCl2 + H2O + Cl2 balanced or not balanced? Explain. | The equation is not balanced because the number of atoms of each element on the left is not equal to their numbers on the right. |
| What is an ionic bond? | it is a bond formed by the attraction between two oppositely charged ions |
| What is a covalent bond? | a chemical bond that involves the sharing of electron pairs between atoms |
| What is the difference between a covalent and an ionic bond? | a covalent bond shares electrons where as an ionic bond transfers them |
| What is a homogeneous mixture? | a mixture with uniform composition throughout |
| What is a heterogeneous mixture? | type of mixture in which the composition can easily be identified since there are two or more phases present, not uniform composition |
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