22. In a neutralization reaction, an acid and base react to form __ and __ salt and oxygen gas salt and ammonia salt and water hydroxide and ammonia
18. Determine the total pressure of a gas mixture that contains O_(2),N_(2) and He, if the partial pressure of the gases ares P_((O_(2)))=200mmHg,P_((N2))=350mmHg,P_((NO2))=428mmHg 975 grams 1.0 atm 975 mm Hg 975 kPa
17. Calculate the molarity of a solution if there is 1.5mol of NaCl in 2.3L of solution. 1.53 M 153 M 0.65 M 6.5 M Clear All
14. Calculate the following using mole to mass Stoichiometry. What mass of iron is needed to react with sulfur in order to produce 96 grams of iron (III) sulfide according to the following equation? 2Fe+3Sarrow Fe_(2)S_(3) 52g S 104g Fe 52 g Fe 84gFe2S3
Use the method you learned previously to convert the following: Convert 3.8 grams of H_(2)O into moles (Molar mass of H_(2)O is 18.02g/mol) square square times underline ( )=square square
28. What makes carbon unique? It is used as a fuel source. It forms covalent bonds only It has 4 valence electrons that produce a strong covalent bond
Use the combined or ideal gas law to solve this problem. Round to 2 decimal places if needed (ex 3.1415926arrow 3.14) What pressure will be exerted by 0.450 moles of a gas at 25^circ C in a fixed container that has a volume of 650 mL? The pressure will be square latm
Drop 2-3 pellets of potassium hydroxide into a test tube and place it in a test tube amount of nitric acid (HNO_(3)) and observe the reaction. EQN: underline ( )KOH+underline ( )HNO_(3)arrow underline ( )KNO_(3)+underline ( )H_(2)O
Reactions that have a low energy of activation tend to proceed at a high rate. True False
Identify all of the following compounds that contain covalent bonds? SiO_(2) CaO HF D NI_(3)
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.
