Significant digits are the number of digits that reflect the precision of a measurement or number. true or false

Heated blocks of iron used to be warm bed. A 1600g brick of iron heated to 155c would release how many joules of heat energy as it cooled to 25c?

Which location would be best for solar energy

Suppose that you take the spectra of several stars to identify the 434-nm line of hydrogen (color = indigo), but you find the lines are shifted due to the Doppler effect.

How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of one molecule of pyruvate?

Which of the following best matches a part of a living cell with the function it performs? 1. Cytoplasm: fluid which carries the nucleus and other organelles 2. Vacuole: fluid which carries the nucleus and other organelles 3.

According to the ph scale, what is the approximate ph of acid rain? a. 4.0 b. 4.5 c. 5.0 d. 5.5

You find a little bit (0.150g) of a chemical marked Tri-Nitro-Toluene, and upon combusting it in oxygen, collect 0.204 g of CO2 and 0.030 g H2O (we'll assume that these are the products, along with nitrogen).

What reaction occurs when two amino acids are put together?

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains of water at. During the reaction of heat flows out of the bath and into the flask. Calculate the new temperature of the water bath.

An aluminum can has a height of 4.83 inches, a diameter of 2.60 inches, and a uniform wall/end thickness of 0.0112 inches.