Spontaneous reactions __ are always exothermic always take place at a rapid rate always release free energy always result in increased disorder of the system
Why does a higher temperature cause a reaction to go faster? Collisions occur with greater energy only. There are more collisions per second only. There are more collisions per second and the collisions are of greater energy. There are more collisions per second or the collisions are of greater energy.
What is the molar solubility of Ni_(3)PO_(4) in a 1.00L solution of 0.00300M solution of Ni^+ Ni_(3)PO_(4)Ksp=4.5^ast 10^-18 Answer
7. Hemiacetals are? a. produced on the oxidation of a carboxylic acid b. result of the reaction between an aldehyde and a ketone c. are produced when an ether reacts with a ketone
Which of the following functional groups is present in acetic acid? hydroxyl group sulfhydryl group carbonyl group carboxyl group
Which of these drinks contain the most alcohol? A 12 ounce beer A 5 ounce glass of wine They all contain equal amounts of alcohol A 1.5 ounce shot of 80 proof whiskey
Strong bases dissociate only slightly in water. True False
Use the balanced equation, 4Al+3O_(2)arrow 2Al_(2)O_(3) to answer the following question. How many grams of O_(2) are needed to react completely with 14.3 g of Al? Be sure your answer has the correct number of significant figures. square g O_(2)
4.2 Write the symbols for the following elements: a. oxygen b. lithium c. uranium d. titanium e. hydrogen f. chromium g. tin h. gold
Identify the spectator ions for the reaction between calcium nitrate and sodium sulfate The balanced molecular equation is Ca(NO_(3))_(2)(aq)+Na_(2)SO_(4)(aq)arrow CaSO_(4)(s)+2Na NO3 (aq) Ca^2+ and NO_(3)^- Na^+ and NO_(3)^- Na^+ and SO_(4)^2- Ca^2+ and SO_(4)^2-
Given the following reactions and corresponding $\Delta H$ values, find the $\Delta H$ (to the nearest whole \#) for the reaction: $H_{2}SO_{4}(l)\rightarrow SO_{3}(g)+H_{2}O(g)$ $H_{2}S(g)+2O_{2}(g)\rightarrow H_{2}SO_{4}(l)$ $\Delta H=-235kJ$ $H_{2}S(g)+2O_{2}(g)\rightarrow SO_{3}(g)+H_{2}O(l)$ $\Delta H=-207kJ$ $H_{2}O(l)\rightarrow H_{2}O(g)$ $\Delta H=44kJ$ $\square $
Convert $4.68\times 10^{25}$ atoms $PBr_{3}$ to mol
Which of the following best describes a mixture? a material that is made up of many molecules a substance that can be changed into another substance a material that contains two or more substances a substance that has been broken down into Its smallest parts
What is used to of a hope of sixes in a a compound heard on the chermal reme? the periodic table prefixes chemical symbols the IUP AC
40. Using the hyphen form of symbol writing write the name of this atom. ${}_{9}^{19}F^{-1}$
Which of the following will not increase 1 point the rate of a chemical reaction? increasing surface area stirring decreasing the temperature increasing the concentration A __ is a substance that increases the rate of a reaction without being consumed. __ 1 point A(n) __ slows down the rate of a reaction. __ is a substance that 1 point
Use molecular orbital theory to determine the bond order in $H_{2}$ o 2 1 3
What partie should be used for the caygin akan when maning the characal formuls $SO_{2}?$ $\square $ disappointed mono- pent.
What happens to the pH of a buffer solution if it is diluted by adding more water? A) pH increases B) pH decreases C) pH remains the same D) pH becomes 7 E) It depends on the starting volume of the buffer
What is the chemical formula for lead (II)sulfate? $Pb_{3}(SO_{4})_{2}$ $PbSO_{4}$ $Pb_{3}(SO_{3})_{2}$ $PbSO_{3}$
