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Questions in chemistry

[Terjawab] How can the rate constant be determined from the rate law? A. The rate constant can be calculated from the exponents of the concentrations. B. The rate constant is the reaction rate multiplied by the concentration terms. C. The rate constant is the reaction rate divided by the concentration terms. D. The rate constant is the same thing as the reaction rate for the reaction.

[Terjawab] Which chemical or physical change is an exothermic process? A. the baking of cookies B. a glass C. the combustion of gasoline D. the evaporation of water from a pool E. the cold pack reaction [tex]$\left( NH _4 NO _3+ H _2 O +\right.$[/tex] heat [tex]$\rightarrow NH _4 OH + HNO _3$[/tex] )

[Terjawab] Which property would cesium most likely have? A. It is hard. B. It is ductile. C. It is a gas. D. It has low reactivity.

[Terjawab] Use the mass and density data to calculate the volume of corn syrup to the nearest tenth. Mass of corn syrup = 57.3 g Density of corn syrup = 1.38 g / mL

[Terjawab] Andy has two samples of liquids. Sample A has a pH of 4, and sample B has a pH of 6. What can Andy conclude about these two samples?

[Terjawab] A solution has a pH of 2. Which best describes the solution? A. a strong acid B. a strong base C. a neutral solution D. a weak base

[Terjawab] Which of the following causes a chemical change? A. metabolizing fat B. winding an alarm clock C. slicing a tomato D. pumping gasoline E. digging a hole

[Terjawab] For the equation [tex]BaCl _2+ Na _2 SO _4 \rightarrow BaSO _4+2 NaCl[/tex], how many chlorine atoms are on the reactants side and on the products side? A. reactants: 1 ; products: 1 B. reactants: 1 ; products: 2 C. reactants: 2 ; products: 1 D. reactants: 2 ; products: 2

[Terjawab] Which chemical or physical change is an exothermic process? A. the baking of cookies B. the combustion of gasoline C. the evaporation of water from a pool D. the cold pack reaction $\left( NH _4 NO _3+ H _2 O +\right.$ heat $\rightarrow NH _4 OH + HNO _3$ )

[Terjawab] 2 3 5 7 Which element has the greatest average atomic mass? A. iodine B. bromine C. tellurium D. krypton