How many significant figures are in 23.479

The electric force between a charged foam cup and a positively charged metal sphere is 2.12 newtons. If the charge on the cup is 2.0 * 10-6 coulombs and the charge on the metal sphere is 2.

Consider the following equilibrium reaction having gaseous reactants and products. 4HCl + O2 ⇌ 2H2O + Cl2 Which of the following would result from increasing the volume of oxygen? A. The volume of hydrochloric acid increases. B.

How many atoms are in 20.0g Ca?

The U. S. Navy has a system for communicating with submerged submarines. The system uses radio waves with a frequency of 76s^-1. what is the wavelength of the radiation in meters? In miles?

What is the energy required to remove an electron from an atom in the gaseous state called

If a net force of 5.0 forward acts on a 0.60 kg toy car, what is it's acceleration?

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing chromatography sorting

A gas expands in volume from 26.7 to 89.3 mL at constant temperature. Calculate the work done (in joules) if the gas expands (a) against a vacuum, (b) against a constant pressure of 1.5 atm, (c) against a constant pressure of 2.8 atm. (1L⋅atm=101.

Beta particles are emitted from radioactive atom p when it disintegrates spontaneously to form non radioactive atom q. which of these statements is most likely correct about atom p and atom q?

What should I do for the science fair?