Chemistry

25g of a metal solid transfers 190.8 j of heat to its surroundings and in the process goes from 46^circ C to 29^circ C What is the identity of the solid? Al Ag Pb Fe

The oxidation number of nitrogen given for all the following species is correct except: NH_(2)OH(-1) N_(2)H_(4)(-2) N_(2)O(+1) HNO_(2)(+3) HN_(3)(-1)

Some ions are sketched below. Rank them in increasing order of size of hydration enthalpy Delta H_(myd) That is, select I next to the ion with the smallest Delta H_(hrd') select 2 next to the ion with the next bigger Delta H_(hyd') and so on. (-) [Choose one) V (Choose one) V square . square Note for advanced students:please compare the absolute magnitude of Delta H_(hyd). For example, if Delta H_(hyd)=-1kJ/mol for the first lon and Delta H_(hyd)=-2kJ/mol for the second ion, then the first ion has the smaller Delta H_(hyd) and the second lion has the bigger Delta H_(myd).

Compounds are types of matter composed of two or more types of atoms bonded together. False True

Write the balanced net ionic equation for the following reaction. H_(2)SO_(4)(aq)+2NH_(4)OH(aq)arrow 2H_(2)O(l)+(NH_(4))_(2)SO_(4)(aq) A 2H^+(aq)+2NH_(4)^+(aq)+OH^+(aq)arrow 2H^+(l)+OH^- (l)+2NH_(4)^+(aq) B H^+(aq)+OH^-(aq)arrow H_(2)O(l) C 2H^+(aq)+SO_(4)(aq)+OH^-(aq)arrow 2H^+(l)+OH^-(l)+ SO_(4)^2-(aq) D 2H^+(aq)+SO_(4)(aq)+OH^-(aq)arrow 2H_(2)O(l)+SO_(4)^2- (aq) E 2H^+(aq)+SO_(4)(aq)+2NH_(4)^+(aq)+OH^-(aq)arrow 2 H^+(l)+OH^-(l)+2NH_(4)^+(aq)+SO_(4)^2-(aq) F 2H^+(aq)+2NH_(4)^+(aq)+OH^-(aq)arrow 2H_(2)O(l)+2 NH_(4)^+(aq) . F G (NH_(4))_(2)SO_(4)(aq) H_(2)SO_(4)(aq)+2NH_(4)OH(aq)arrow 2H_(2)O(l)+ H 2H^+(aq)+SO_(4)(aq)+2NH_(4)^+(aq)+OH^-(aq)arrow 2 H_(2)O(l)+2NH_(4)^+(aq)+SO_(4)^2-(aq) (H

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)+2NaNO_(3)(aq) Ca^2+ and NO_(3)^- Ca^2+ and SO_(4)^2- Na^+ and NO_(3)^- Na^+ and SO_(4)^2-

How do we calculate molar mass of water (H_(2)O) You add up the atomic masses of 2 hydrogens and one oxygen from the periodic table ) You add up the weight of hydrogen and oxygen o

If an identification test is positive it means a chemical reaction has occured True False

Which reaction is metal displacement reaction? NaCl(aq)+AgNO_(3)(aq)arrow AgCl(s)+NaNO_(3)(aq) HBr(aq)+KOH(aq)arrow H_(2)O(l)+KBr(aq) Zn(s)+2HCl(aq)arrow ZnCl_(2)(aq)+H_(2)(g) 2Lil(aq)+Pb(NO_(3))_(2)(aq)arrow Pbl_(2)(s)+2LiNO_(3)(aq)

Burning Magnesium with a flame will cause what to happen? A bright white light and white ash form Nothing A bright black light and black ash form A bright red light and red ash form