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What is the name of S2O5?

Based on the successive ionization energies of an unknown element in the table provided, how many valence electrons does the element have?  Successive Ionization energies Number of Electrons Removed Ionization Energies (kJ/mol)  1 1000 2 2000 3 5000 4 7,500 5 21,000 6 23,000 7 25,000

Which of the following images below represents a mixture of 2 different molecular elements? 

At constant temperature a 341 mL sample of gas has a pressure of 1.78 atm. What is the volume if the pressure is increased to 2.65 atm? 

Use the table below to find \( \displaystyle \lim_{x\rightarrow4^{-}} f(x) \) . Note: This question is a one-sided limit. Table of Values \(x\) \(f(x)\) 3 6 3.9 7.92 3.99 7.99992 3.999 7.999999992 —- —- 5 11 4.1 9.07 4.01 9.00007 4.001 9.000000007  

Determine if the following interactions are hydrogen bonds?  1 is [1]. 2 is [2]. 3 is [3].

What volume in milliliters of 0.0432 M calcium hydroxide (Ca(OH)2) is needed to neutralize 385 mL of 0.0611M hydrochloric acid (HCl)?

What element does the following ground state electron configuration represent? [Kr]5s24d105p2

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 192.168.1.16 255.255.255.240. What wildcard mask would the administrator use in the OSPF network statement?

How many unpaired electrons are present in the ground state phosphorous (P) atom?