Ammonia (NH_(3)) is synthesized by the reaction of nitrogen and hydrogen in the presence of an iron catalyst according to the equation below.Removing the iron catalyst would decrease the reaction rate. 3H_(2)(g)+N_(2)(g)xrightarrow (Fe)2NH_(3)(g) True or False

An equilbrium constant with a value of 8.0times 10^6 Indicates that at equilibrium __ Multiple Choice the reactants are favored the products are favored approximately equal concentrations of reactants and products are present there are more reactants present than products None of the choices are comect.

c. Use the activity series of metals to predict the products of the following single-replacement reaction. Explain your answer. (1 point) NiCl_(2)+Fearrow

A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration of 68.gcdot L^-1 The geochemist also measures the concentration of salt in several nearby non-isolated lakes and finds an average concentration of 6.6gcdot L^-1 Assuming the salt concentration in Lake Parsons before it became isolated was equal to the average salt concentration in nearby non-isolated lakes, calculate the percentage of Lake Parsons which has evaporated since it became isolated. Be sure your answer has the correct number of significant digits.

What is the carbon chain length of a saturated fat that is likely to increase risk of heart disease? 14 18 22

Consider the reaction: 2C_(2)H_(6)(g)+7O_(2)(g)arrow 4CO_(2)(g)+6H_(2)O(g) Decreasing the concentration of C_(2)H_(6)(g) will decrease the reaction rate. True or False

Fill in the Blank Question The equilibrium constant, K,is the ratio of the concentrations of the square over the concentrations of the square and is a characteristic value of a reaction at a given square C Need help? Review these concept resources. Read About the Concept

What are the products when you neutralize HNO_(3) with KOH?

A chemical reaction releases 55.2 kcal. How many kilojoules does this correspond to? Multiple Choice 231 kJ 0.231 kJ 13.2 k J 1,320 kJ None of the choices are correct.

An example of a Class 1, Group B material is Propane. True False

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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.