Answers: 2
Chemistry, 22.06.2019 10:30
What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5
Answers: 1
Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 14:00
What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?
Answers: 3
Chemistry, 22.06.2019 18:50
Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space
Answers: 3
3)
Mercury metal is poured into a graduated cylinder that holds exactly 22 ml. The mercury used to...
Mathematics, 03.12.2020 21:40
Business, 03.12.2020 21:40
Social Studies, 03.12.2020 21:40
Advanced Placement (AP), 03.12.2020 21:40
Mathematics, 03.12.2020 21:40
Mathematics, 03.12.2020 21:40
Mathematics, 03.12.2020 21:40
English, 03.12.2020 21:40
Geography, 03.12.2020 21:40
Mathematics, 03.12.2020 21:40
Mathematics, 03.12.2020 21:40