John weighs 115 kg. Sally weighs 115 lb. Who is heavier of the two?

An electron is in a region outside the nucleus. An electron a) Is larger than a proton and has no charge b) Has less mass than a proton and has a negative charge c) Is smaller than a proton and has no charge d) Has a positive charge

1. Which of the following is true about theories? They are false all the time. They cannot be misproven. They are absolute truths. They are accepted as true because of confirmation by experimentation.

A student sets up an experiment with two groups of bacteria. One group is exposed to the normal amount of mercury found in the environment. The other group gets a larger dose. Which term describes the normally treated group

C). How many mole of A1,0, (aluminum oxide) would be produced from reacting 8 mole of aluminum?

Why does the compound formed by an ionic bond have a neutral charge when the ions that bond are charged?

How are the number of protons and the number of neutrons related?

If a sample of copper with a density of 8.90 g/cm3 displaces 13.0 mL of water when placed in a beaker, what is its mass? a 1.46 g b. 0.685 g c. 116 g

Which statement accurately describes the origin and expansion of the universe

Conversion. 5 km to inches

How many kilojouls are required at 0c to melt an ice cube with a mass of 25g