3.
A student uses a solution that contains 16 grams of water to conduct an evaporation
experiment.
At the end of one hour, the amount of water in the solution has decreased
by 3.5%.
. At the end of two hours, the amount of water in the solution has decreased
by another 4.25%.
Which calculations can be used to determine the amount of water, in grams, remaining
in the solution at the end of the second hour?

Will give brainliest it is a lab from k12 here is the linkfor each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. type your answer here. (score for question 3: of 5 points) were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. type your answer here. (score for question 4: of 5 points) make a general statement about the reactivity of the metals in this experiment. type your answer here.

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

How many moles are contained in 5.6 l of h2 at stp