A 2.56g sample of anthracene C14H10, was burned to heat an aluminum calorimeter (mass = 948 g). The calorimeter contained 1.50 L of water with an initial temperature of 20.5oC and a final temperature of 34.3oC.

Which of the following characteristics describes aerobic organisms. 1) Not very active, efficient use of energy 2) Not very active, inefficient use of energy 3) Very active, efficient use of energy 4) Very active, inefficient use of energy

Why would you use more than one indicator to determine the ph of a solution?

1a) consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in the presence of sodium hydroxide.

Câu 1: Trong phân tử este (X) no, đơn chức, mạch hở có thành phần oxi chiếm 36,36 % khối lượng. Số đồng phân bố tạo của X là A. 4. B. 5. C. 2. D. 3.

How does the space between atoms change as agas goes through prase changes to become a soild? how. do they different? use words to describe

What happens to an isotopes during radioactive

Why does the effective nuclear charge increase across a row of the periodic table?

Iodine-131 decays to form xenon-131. the half-life of this reaction is 8.07 days. from a 200-g sample of iodine-131, how much of the sample is xenon-131 after 16.14 days?

Complete the following statement by checking all that apply Creativity allows scientists to develop multiple approaches to solving problems. adapt to changes in scientific knowledge. look at old problems in new ways.

The atomic weight of hydrogen is 1.00794. a. True b. False