For the hypothetical reaction A → B, calculate the average rate of disappearance of A if the initial concentration of A is 0.91 M and the concentration of A after 90 minutes is 0.11 M.

Select all of the examples of a base. Vinegar Baking soda Lemons Tomatoes Bleach Soap Bananas Ammonia

In a horse cart, each of the two horses pull with a force of 1000N. find the resultant force. give reasons.

Accuracy is the correctness of a measurement. true or false.

Why is gravity an example of a scientific law?

A painter lifts a 2.8 kg bucket using a rope. if the acceleration of the bucket in 3.1 m/s2, what is the tension in the rope (in n) ? selected: a. 27.4 n b. 9.8 n c. 8.68 n d. 36.1 n e. 2.94 n f. 0 n

What is cosmic microwave background radiation?

Ocean water has a salinity of 35 parts per thousand. Fresh water has a salinity of less than 0.5 parts per thousand. What can you conclude from this information? A. Ocean water is rich in salt minerals. B.

You decide to add up all the work you did yesterday. If you accomplished 10,000 newton·meters of work yesterday, how much work did you do in units of joules?

What causes day and night on earth?

A yo-yo can be thought of as a solid cylinder of mass m and radius r that has a light string wrapped around its circumference (see below). One end of the string is held fixed in space.