Which two particles in an atom are equal in number

Earthquakes are vibrations of Earth's crust. Which of the following is used to measure the size of an earthquake? a. barometer b. Doppler radar C. depth scale d. Seismograph

Air in a closed cylinder is heated from 25 degree to 36 degree. If the initial pressure is 3.80 atm what is the final pressure?

How much heat in kj is released by burning 9.5 grams of methane?

Type the letter that represents the correct location for each particle type below. The neutron is found at. The electron is found at. The proton is found at.

How many atoms are in 2.50 mol of hydrogen?

Name the element that has atoms with the same electronic structure as sulfur ion

The mass of a 2.0 centimeter sample of a substance is 3.2 grams. Calculate the density of the substance

The aromatic amino acids are synthesized in humans by a pathway beginning with reaction of indole with serine. synthesized in bacteria in a pathway shared by all three, up to the production of the intermediate chorismate.

Which element is a liquid at 25 celsius degrees and 1.0 atm? (A) bromine (B) krypton (C) phosphorus (D) xenon

Why do atoms receive a positive or negative charge when they give or take electrons? Include the nucleus in your explanation.