Hoà tan hoàn toàn một lượng magie trong 200g dd H2SO4 loãng vừa đủ, sau phản ứng thu được magie sunfat MgSO4 và 3,36 lít khí hidro (đktc) a/ Tính khối lượng magie đã phản ứng
b/ Tính khối lượng magie sunfat MgSO4 thu được
c/ Tính nồng độ phần trăm dd H2SO4 đã dùng

Two atoms interact with each other as shown by the equation. complete the equation by filling in the missing parts. 1 2 3 4 5 h he li

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?