A student places a 12 gram cube of ice inside a container. After six hours, the student returns to observe the contents of the container. Which
Sentence sugests that the container is an open system
A
The container contains 12 grams of liquid water and no ice
B. The container contains 12 grams of ice and no liquid water
C. The container contains 8 grams of liquid water and no ice
D. The container contains 8 grams orice and 4 grams of liquid water.
E The container contains 8 grams of liquid water and 4 grams of water vapor,

Write the balanced equation for a reaction between aqueous nitric acid (hno3) and solid lithium metal (this is a single replacement reaction)

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Lab reagent, hypothesis test. a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl. these six measurements are assumed to be an srs of all possible measurements from solution. they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution. carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.