Balance the following reaction and determine the sum of the coefficients:___ Cr +  ___H2SO4   –>  ___Cr2(SO4)3  +  ___H2

MolarityWhat is the molarity of a solution that contains 92.6 g of K2CO3 in 429 mL of solution?The molar mass of K2CO3 is 138.21 g/mol.

Density Read the mass and determine the volume of an irregularly-shaped metallic object using the information in the attached image file.  Calculate the density from this information and identify the element from the list of densities below. Pt (platinum)  21.5 g/cm3 Fe (iron)            7.87 g/cm3 Ag (silver)        10.5 g/cm3 Al (aluminum) 2.60 g/cm3 Au (gold)         19.3 g/cm3 density volume displacement

Gas LawsA sample of PH3 occupies 0.650 L at a temperature of 293 K and a pressure of 951 mmHg. How many moles of PH3 are in the sample?760 mmHg = 1 atmR = 0.0821 L atm/mol K

Refer to Exam File: Geometries and HybridizationWhich molecule has resonance structures?

Reaction A   CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)Reaction B   Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)Reaction C   AgNO3 + NaCl → AgCl + NaNO3 Reaction D   HCl + NaOH → NaCl + H2OReaction E   N2(g) + 3H2(g) → 2NH3(g)Titration In the acid-base neutralization reaction, it was found that 25 mL of a 1.00 M HCl solution neutralized 50.0 mL of the base. What is the molarity of the base solution?

Reaction A   CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) Reaction B   Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Reaction C   AgNO3 + NaCl → AgCl + NaNO3  Reaction D   HCl + NaOH → NaCl + H2O Reaction E   N2(g) + 3H2(g) → 2NH3(g) Limiting reactant problem What is the mass of the precipitate produced in the reaction of 4.50 g of silver nitrate with 3.77 g of sodium chloride? (You may need to consult the solubility table to determine the precipitate before proceeding with the calculation.) Molar Masses

In the next several test questions, you will see five reactions listed at the top  (Reactions A through E).   Read each question carefully and choose the correct reaction for solving each question.

Which of the following is a polar molecule?I2, CO, CO2, CCl4, BF3

When someone speaks two languages, the languages stay totally separate in their brain and never influence each other.