Tell if the mixture is homogeneous or heterogeneous and explain why you classified it as homogeneous or heterogeneous. a) Iced tea b) Salad c) Chocolate chip cookie
The scientific method has several components...
Classify the following statements as observation, hypothesis, theory, or law. a) If I do all of the assignments for a class, then I will succeed in the course. b) The substance is blue, crystalline, and dissolves in water. c) Most acids taste sour.
Tell whether the following is a property of a compound or a mixture: a) Can contain three elements in a specific ratio b) Varies in chemical composition depending on the sample size c) Can be classified as either homogeneous or heterogeneous
While you are working in the lab your instructor hands you a vial of red, crystalline material and asks you to tell if it has ionic or covalent bonding. Describe at least one experiment you would do to answer the instructor's question.
Give the name and chemical symbol for: a) An element with 50 electrons b) An element with 28 protons c) An element with 2 electrons in the first shell, 8 electrons in the second shell, 8 electrons in the third shell, and 2 electrons in the fourth shell d) An element with atomic number of 78
Number of electrons in the outermost shell...
Think about the number of electrons in the outermost shell of the elements involved and write the chemical formula for: a) A compound between potassium and iodine b) A compound between hydrogen and nitrogen c) A compound between carbon and bromine
Compounds that contain an element from the noble gas family...
There are very few compounds that contain an element from the noble gas family (elements in column 18, rightmost column). Explain why there are so few noble gas compounds in nature.
Gasoline is sold in various octane ratings. You make your selection of octane rating right at the pump. What is meant by an octane rating of 89?
Explain solubility rules used to predict precipitation reactions. Predict if precipitation occurs in the mixing reactions of the following aqueous solutions: a) ammonium sulfate + iron(II) nitrate b) potassium iodide + lead(II) nitrate c) sodium nitrate + copper(II) sulfate d) ammonium iodide + silver nitrate
What color- red or blue- would you expect each of the following to produce when added to litmus: Milk of magnesia wine seawater coca-cola tomato juice
