What would be a Prerequisite Skill or Prior Knowledge that a 5th grade science class should know about Volcano Eruptions before using the below standard? Standard Conduct an investigation to determine whether the mixing of two or more  substances results in new substances.

Masses of compounds used and observations NaCI CuSO4-5H20 Bright blue crystaline solids (NH4)2Fe(SO4)2 pale, Blue-green crystalline solid colorless Crystals Appearance of solid Mass of vial and 12.8364 12.7398 12.9445 compound (g) Mass of emptied vial (g) 11.6023 11.4888 11.9221 Mass of compound used (g) 1.2341. 1.2510. 1.0224 Volume of prepared solution = Type response here. Mass of sodium chloride used = Type response here.

Give typed explanation

Solve question 26 and 27

A standard crank ice cream maker uses a mixture of ice water and salt to cool ice cream mix to the point of freezing. If ice cream freezes at 27 degrees Fahrenheit, what is the minimum concentration of salt needed to make ice cream?

Label as a substance, heterogeneous mixture, or a solution: Beach sand substance solution O heterogeneous mixture

A student is trying to freeze a solution of urea in the lab where the temperature is around 22°C. The student prepares a cooling bath by adding about 20 g of table salt to a 100 g of ice/water mix. Assuming that all salt dissolves, what is the expected temperature of the cooling bath? around 16 degrees Celsius around -6 degrees Celsius around -13 degrees Celsius around 9 degrees Celsius around 13 degrees Celsius