Calculate the pH of a solution in which the concentration of H^+ ions is 1x 10^-6M 16 6 7 12
What was a by-product of the ethyl alcohol and sodium silicate chemical reaction? sodium alcohol pure sodium pure silicon water
A symbol is one or two __ that represent the name of an element. A letters B numbers
If the total mass of the products of a reaction is less than the mass of the reactants, what must be true? (3 points) A nuclear reaction has taken place. A chemical reaction has taken place. Nuclear fusion has occurred. Nuclear fission has occurred.
Which of the following is a property of a base? unreactive watery feel strong color nonelectrolyte bitter taste
Which formula does NOT represent a molecule? H_(2)O Au CO_(2) NH_(3)
The amount of product that is produced during a reaction is dependent upon __ the amount of limiting reactant none of these the amount of excess reactant the amount of limiting and excess reactant
The number of moles in 3.5times 10^23 molecules Si is 0.984 moles 0.58 moles 0.602 moles 0.281 moles
Solutions Final Review Choose all of the properties of solutions. Extremely small particles. Particles that are evenly distributed. Scatter light in the Tyndall Effect. Particles don't settle when they sit Particles do settle when they sit. Are all homogeneous Can be homogeneous or heterogeneous.
Alubricant can equalize pressures in various places along two contacting surfaces, thereby reducing Fluid friction Mechanical shock Rust and corrosion Surface fatigue
Before you go, which type of molecule would you choose to be the anode in a lithium battery? a) The metal with the most negative potential b) It does not matter since lithium's potential is so negative c) The metal with the most positive potential d) Another lithium compound
Part I: Unit Conversions.Show all work (known and unknown, and dimensional analysis - including units! Write your answers in the boxes provided. Unit Test: Dimensional Analysis and Mole Convers 1. Find the number of minutes in 25 years, assuming that $1year=365days$ K:25 years 2. The driving distance from Spokane to Seattle is 479,000 meters. Convert this distance to miles given $1m=100cm,1in=2.54cm,12in=1ft,$ and $1mi=5280ft$ $\square $ Part II: Mole Conversions . Show all work (known and unknown, and dimensional analysis - including units! Write your answers in the boxes provided. 3. A sample contains $9.2\times 10^{22}$ atoms of beryllium (Be)How many moles is this? $\square $ 4. The formula for Aluminum Carbonate is $Al_{2}(CO_{3})_{3}$ What is the molar mass of aluminum carbonate? $\square $
The following reaction is an example of a substitution reaction. $2Na+Cl_{2}\rightarrow 2NaCl$ TRUE FALSE
Heterogeneous mixtures are observed to be uniform throughout. True False
What are some examples of foods that need an emulsifier mayonnaise chocolate ice-cream oil water various salad dressings.
27. The contents of a drum have not been identified. You notice crystalline material on top of the drum, you should treat the contents as: A. shock-sensitive waste. B. nearly empty. C. containing chlorinated solvent. D. containing caustic materials.
A weak acid is a dilute acid that is not very powerful. True False
What is a crucial aspect of chemical optimization? Adjusting team member speed Pre-treating the vehicle Using water reclamation tanks Ordering new equipment
Why is chemistry sometimes referred to as the "central science?" Because we need to know it to survive as a species. Because it is interconnected with many other STEM disciplines. Because it incorporates principles from math and physics. Because there are many subdisciplines of science that rely on chemistry.
Malia was able to make a paperclip float on the surface of water. What will most likely happen to the paperclip if a drop o dishwashing detergent is added near it? Soap is a surfactant that increases the intermolecular forces of water allowing the paperclip to continue to float. Soap makes the water less viscous making the paperclip sink. Soap is a surfactant that disrupts the intermolecular forces of water making the paperclip sink. Soap makes the water more viscous allowing the paperclip to continue to float.
