What does a plateau represent on hearing curve

If an isotope of an element has 40 neutrons and a mass number of 79, how many electrons must it have?

If you drop a 25-gram piece of metal that has a temperature of 100° Celsius into 1000 grams of water at 20° Celsius, what best describes what would occur? 1. the temperature lost by the metal will equal the temperature gained by the water 2.

4.19-g sample of nitrous oxide (an anesthetic, sometimes called laughing gas) contains 5.73 * 1022 N2O molecules. How many nitrogen atoms?

If a runner maintains a constant speed of 12 miles an hour how long will it take to complete a half marathon race of 13.1 miles?

Fission of uranium produces energy and___. A.) isotopes of smaller elements. B.) lighter isotopes of uranium C.) Heavier isotopes of uranium D.) isotopes of larger elements

What is the volume of an object with a height of 2.3cm, a width of 2.4cm, a mass of 17.5g, and a length of 20cm?

Is layers of sediment forming at the bottom of the ocean erosion?

How to find the better buy of two of the same item, but they have different units of measurements and different costs.?

The agricultural practice of spraying insecticides leaves behind which pollutant in the soil? A. Chemical poison B. Excess nitrogen C. Excess salt D. Acidic compounds

What is the name of the compound composed of iron and carbonate? [hint: iron has a + 3 charge in this compound]?