Which of the following statements is true about endothermic reactions? They release heat to the surroundings The products have less energy than the reactants They absorb heat from the surroundings They occur spontaneously

What is the name of this compound? $Al(C_{2}H_{3}O_{2})_{3}$ ammonium acetate aluminum $(III)$ acetate aluminum acetate ammonium carbonate

A synthetic lubricant presently used with ternary blends containing HCFCs is known as __ Alkylbenezene Polyalkylene Polywannacracker Polyolester

Which of the following equations is correct? $TC=FC+VC$ $TC=FC-VC$ $TC=MC-VC$ $TC=FC\times VC$

Identify the geometry of $[Cr(H_{2}O)_{6}]^{3+}$ tetrahedral square planar octahedral trigonal planar bent

An element is best described as a material that has consistent physical properties. that has consistent chemical properties. that is pure. with more than one type of atom. consisting of only one type of atom.

What is the atomic number of Argon? 40 22 18

vphich pure substance can be classified as an element? $H_{2}$ $NO_{3}$ NaCl $H_{2}SO_{4}$

Q2: Fill in the blank. Know your __ type your text here

What is the approximate pH at the equivalence point of a weak acid- strong base titration if 25 mL of aqueous HF requires ; 30.00 mL of 0.400 M NaOH? $K_{a}HF=6.76\times 10^{-4}$ a. 1.74 b. 5.75 c. 8.25 d. 12.26

Question 3 of 10 What property is used to calculate the pH of a solution? A. The hydrogen ion concentration in ppm B. The hydrogen ion concentration in $mg/dL$ C. The hydrogen ion concentration in $mol/L$ D. The hydrogen ion concentration in $mol/kg$