Bohr model gizmo questions
Please help

Which of the following is true about the speed of light? it depends on the wavelength.

Yasmin's teacher asks her to make a supersaturated saline solution. her teacher tells her that the solubility of the salt is 360 g/l at room temperature (25 °c). how can yasmin make a supersaturated saline solution? she can add 380 g of salt to 1 l of hot water (75 °c) and stir until all the salt dissolves. then, she can carefully cool the solution to room temperature (25 °c). she can add 360 g of salt to 1 l of room temperature water (25 °c) and stir the solution until all the salt dissolves. she can add 380 g of salt to 1 l of cold water (5 °c) and stir the solution until most of the salt dissolves. then, she can carefully heat the solution to room temperature (25 °c). she can add 380 g of salt to 1 l of room temperature water (25 °c) and let the solution sit for 24 hours, so the salt dissolves.

Ionic solids such as sodium chloride are easily shattered, but metallic solids such as copper can be easily bent and shaped. this difference occurs because a. ionic solids have low melting points b. atoms in metallic solids are not arranged in a regular pattern c. covalent bonding between sodium and chlorine keeps the solid rigid d. mobile electrons in the copper can shift without disrupting the solid