9) Air is about 76% nitrogen by mass. Nitrogen is nonreactive because the triple bond in N_(2) is not easily broken. The bond energy of the N_(2) triple bond is 945kJmol-1 What is the corresponding wavelength (nm) of light needed to break this triple bond for one molecule? (assuming one photon interacts with only one molecule) A) 9.45times 10^5nm B) 326 nm C) 1.27times 10^5nm D) 0.157 nm E) 127 nm

Which is a characteristic of the polar water molecule? a tetrahedral electron domain geometry with covalently bonded atoms a linear shape with polar ionic bonds

Use the balanced equation below to answer the question. C_(3)H_(8)+5O_(2)arrow 4H_(2)O+3CO_(2) How many molecules of C_(3)H_(8) are in 4.33times 10^12 molecules of H_(2)O Write your answer in scientific notation Example: 1.23^ast 10^wedge -45 Answer

What is the Delta H_(rxn) for the following reaction? Hint: Use Table 10.3 (Page 430) in your textbook. 2NCl_(3)(g)arrow N_(2)(g)+3Cl_(2)(g) C -823kJ -117kJ -233kJ -475kJ -766kJ

Assuming the volume of the insoluble substance to be 92.5 mL and the mass to be 693.8 g , what is the density of the substance?Be sure to use the correct number of significant figures. 0.1333g/mL 7.50g/mL 7.500g/mL 0.133g/mL

What is the bond order of F_(2) Express your answer numerically as an integer. View Available Hint(s) square

Exercise 2.14 Describe the hybridization of the central atoms N and S in molecules and the molecular geometry of: a. NO_(2) b. SO_(3)

Isotopes of an element are atoms with different numbers of A electronic shells B neutrons C electrons D protons

Suppose you do this experiment again, and only 12 g of CO2 is produced. What was your percent yield (take the amount you actually made -12g and divide by the amount you thought you'd make __ the answer from above Multiply your answer by 100-since percent means out of 100)

Which one of the following describes the correct trends in electronegativity in the periodic table? increases across a period and decreases down a group decreases across a period and increases down a group increases across a period and increases down a group decreases across a period and decreases down a group

Hot Questions

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.