Chemistry

N_2g+3H_2g leftharpoons 2NH_3g △ H=-92kJmol-1 Consider the chemical reaction for the manufacture of ammonia in the Haber process. The ΔH value shows that the reaction is exothermic. What would be the effect on the position of equilibrium if you increased the pressure? All BUT ONE choice applies. More ammonia would be formed. The position of equilibrium would...

Crystallization of sodium acetate from a supersaturated solution occurs spontaneously. What can you deduce about the signs of △ S and △ H

The rate of reaction is determined by dividing the change in amount of products by the change in time final - initial products/ final - initial time. Was the rate of reaction the same across all the time periods in part I? Explain any differences observed. What happens to the reaction rate as the supply of substrates runs out?

A_ is made up of more than one different type of atom or element bonded together B A heterogenous mixture molecule D c homogenous mixture compound

Goal 3: Determine the characteristics of different types of chemical bonds. 6. Which of the following enables a compound to exhibit electrical conductivity? a. All of the atoms involved in a chemical bond contains valence electrons. b. The molecules redistribute as whole entities in the solution. c. Charged ions can move around water freely. d. The atoms inv...

During the recrystallization of benzoic acid, a student starts with 103 mg of black, impure benzoic acid. After the recrystallization, the student weighs the pure benzoic acid to find there are now only 75 mg. What is this student's perce recovery of benzoic acid? percent recovery=square

Match each formula with it's name: SeO_42- SeO_32- SeO_52- SeO_22- selenate selenite hyposelenite perselenate

At which Celsius temperature does lead change from a solid to a liquid? 1. 874 ° C 2. 601 ° C 3. 328 ° C 4. 0 ° C 12 Which sample represents a homogeneous mixture? 1. C_2H_5OH s 2. C_2H_5OHg 3. C_2H_5OHl 4. C_2H_5OHaq 13 Which statement describes a chemical property of hydrogen gas? 1. Hydrogen gas burns in air. 2. Hydrogen gas is colorless. 3. Hydrogen g...

Minerals are classified as major, trace, and ultratrace. True False Question 39 Which of the following cooking methods increases vitamin loss in foods the most? microwave stir-fry boil steam Question 40 Which of the following is NOT a benefit of dietary fiber? reduces obesity risk increases blood cholesterol promotes bowel health slows glucose absorption

About one percent of carbon atoms have an extra neutron, giving them seven. They're called_ .