How many moles of sulfur trioxide are formed from 5 moles of sulfur dioxide using the given balanced equation? 2SO_(2)+O_(2)arrow 2SO_(3) 1 mol of SO_(3) 2 mol of SO_(3) 3 mol of SO_(3) 5 mol of SO_(3) 6 mol of SO_(3)
Calculate the [H_(3)O^+] of an aqueous solution if the [OH^-]=8.57times 10^-4M Answer: square
2. (2 points each)What is the mass of 1.00 mol of each of the following elements? a. Sodium b. Sulfur
Concept of mole/molecular mass 1. (5 points) What is the total number of molecules in 2 mol of glucose, C_(6)H_(12)O_(6) (1mol=6.02times 10^23molecules)
An increase in oxidation number is: more acidic reduction less basic oxidation
More acidic means more of __ ions in solution. H+ OH- HCO3- H-
Which describes a solution that ionizes partially and forms H+ ions?" Strong Acid Weak Acid Neutral Solution Weak Base Strong Base
The pH of solution A is 2, solution B is 12 and solution Cis7 Solution A-acidic, B basic and C-neutral Solution A-basic, B neutral and C-acidic Solution A-acidic, B-neutral and C-basic Solution A-neutral, B basic and C-acidic
A student found the pH of a given carbonated drink at 1 degree celsius to be 3. He left the drink on the counter for 4 hours and then checked the PH again. The pH showed a decrease because the carbon dioxide increased in the drink The pH showed a decrease because the carbon dioxide decreased in the drink The pH showed an increase due to increase in Carbon dioxide in the drink The pH showed an increase due to the decrease of carbon dioxide in the drink
Which of these are electron pair acceptors Bronsted-Lowry bases Bronsted-Lowry acids Lewis acids Lewis bases
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.
