A scientist has a "mystery element" that she wants to identify by using its properties. These properties include its freezing point. She collected data about the element's freezing point (horizontal line) and displayed it on the graph below. Use the graph above to determine the freezing point of the element (horizontal line). Which of these elements is the "mystery element"? The freezing point of each element is listed by its name. Question 4 options: iron (1539°C 1539 ° C ) nickel (1455°C 1455 ° C ) cobalt (1495°C 1495 ° C ) silicon (1430°C 1430 ° C )

Achemical equilibrium between gaseous reactants and products is shown. n2(g) + 3h2(g) ⇌ 2nh3(g) how will the reaction be affected if the pressure on the system is increased? it will shift toward the reactant side as there is lower pressure on the reactant side. it will shift toward the product side as there is higher pressure on the product side. it will shift toward the reactant side as there are a greater number of moles of gas on the reactant side. it will shift toward the product side as there are a fewer number of moles of gas on the product side.