Atoms of the same element zinc for example have the same number of what

Mass box A = 10 grams; Mass box B = 5 grams; Mass box C-made of one A and one B How many grams of A would be needed to give the same number of particles: as 7.5 grams of B? as 2.5 grams? as 12.5 grams? as 1 gram?

What do you mean by oxonium salt?

For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 4p orbital to a 2s orbital in a hydrogen atom?

How many kilojoules of energy are released when. 1.60 kg of water cools from 80.0 ºC to 60.0 ºC?

17. If 3.25 g of Na2CO3 is used, how many grams of CaCO3 can be made?

How many grams of RbOH are present in 35.0 mL of a 5.50 M RbOH solution?

Which balanced equation represents a chemical change? (1) H2O (l) + energy → H2O (g) (2) 2H2O (l) + energy → 2H2 (g) + O2 (g) (3) H2O (l) → H2O (s) + energy (4) H2O (g) → H2O (l) + energy

What did the scientist say to the hydrogen atom that claimed to have lost an electron worksheet?

Based on reactivity, which of the following elements can replace aluminum (Al) in a compound during a single replacement reaction?

How do you tell if a reaction is endothermic or exothermic using only the written formula