A Question 5 (1 point) Retake question What is the percent by mass of a solution that contains 15.65 g of iron (II) sulfate (FeSO4) dissolved in 99.38 g of water. Please provide your final answer rounded to two decimal places. Only provide the number and no units! Your ch​

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction. express your answer as a chemical equation. identify all of the phases in your answer.

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest