Convert 4800 seconds to hours

1 hr 20 min.

Explanation:

There are 60 second in 1 minute.

There are 60 minutes in 1 hour.

Find the ratio of seconds to hour. To do so, divide 4800 from 60 twice:

4800/(60 * 60) = 4800/3600 = 4/3 = 1 1/3

1 = 1 hour

1/3 = 20/60 = 20 minutes

Your answer would be 1 hour 20 minutes.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".